MAX3245EEWI-T [MAXIM]
Line Transceiver, 3 Func, 3 Driver, 5 Rcvr, BICMOS, PDSO28, 0.300 INCH, MS-013AE, SOIC-28;
| 型号： | MAX3245EEWI-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Line Transceiver, 3 Func, 3 Driver, 5 Rcvr, BICMOS, PDSO28, 0.300 INCH, MS-013AE, SOIC-28 驱动 信息通信管理 光电二极管 接口集成电路 驱动器 |
| 文件： | 总25页 (文件大小：596K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1339; Rev 7; 9/05
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps, 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
________________General Description
__Next Generation Device Features
♦ For Space-Constrained Applications:
MAX3228E/MAX3229E: 15kV ESD-Protected,
+2.5V to +5.5V, RS-232 Transceivers in UCSP
The MAX3224E/MAX3225E/MAX3226E/MAX3227E/
MAX3244E/MAX3245E are 3V-powered EIA/TIA-232
and V.28/V.24 communications interfaces with automat-
ic shutdown/wakeup features, high data-rate capabili-
ties, and enhanced electrostatic discharge (ESD)
protection. All transmitter outputs and receiver inputs
are protected to ±±5kV using IEꢀ ±111-4-2 Air-ꢁap
Discharge, ±8kV using IEꢀ ±111-4-2 ꢀontact Discharge,
and ±±5kV using the ꢂuman ꢃodꢄ Model.
MAX3222E/MAX3232E/MAX3241E†/MAX3246E:
15kV ESD-Protected, Down to 10nA, +3.0V to
+5.5V, Up to 1Mbps, True RS-232 Transceivers
(MAX3246E Available in UCSP™)
♦ For Low-Voltage or Data Cable Applications:
MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA,
2Tx/2Rx RS-232 Transceivers with 15kV
ESD-Protected I/O and Logic Pins
All devices achieve a ±µA supplꢄ current using Maxim’s
revolutionarꢄ AutoShutdown Plus™ feature. These
devices automaticallꢄ enter a low-power shutdown
mode when the RS-232 cable is disconnected or the
transmitters of the connected peripherals are inactive,
and the UART driving the transmitter inputs is inactive
for more than 31 seconds. Theꢄ turn on again when
theꢄ sense a valid transition at anꢄ transmitter or receiv-
er input. AutoShutdown Plus saves power without
changes to the existing ꢃIOS or operating sꢄstem.
Ordering Information
TEMP
PIN
PKG
PART
RANGE
PKG
CODE
21 Thin
QFN-EP*
(5mm x
5mm)
T2155-5
MAX3224EꢀTP
1 ꢀ to +71 ꢀ
The MAX3225E/MAX3227E/MAX3245E also feature
Megaꢃaud™ operation, guaranteeing ±Mbps for high-
speed applications such as communicating with ISDN
modems. The MAX3224E/MAX3226E/MAX3244E guar-
antee 251kbps operation. The transceivers have a pro-
prietarꢄ low-dropout transmitter output stage enabling
true RS-232 performance from a +3.1V to +5.5V supplꢄ
with a dual charge pump. The charge pump requires
onlꢄ four small 1.±µF capacitors for operation from a
3.3V supplꢄ. The MAX3224E–MAX3227E feature a logic-
level output (READY) that asserts when the charge
pump is regulating and the device is readꢄ to begin
transmitting.
MAX3224EꢀUP
MAX3224EꢀAP
21 TSSOP
21 SSOP
—
—
1 ꢀ to +71 ꢀ
1 ꢀ to +71 ꢀ
21 Plastic
DIP
MAX3224EꢀPP
—
1 ꢀ to +71 ꢀ
21 Thin
QFN-EP*
(5mm x
5mm)
MAX3224EETP
T2155-5
-41 ꢀ to +85 ꢀ
MAX3224EEUP
MAX3224EEAP
21 TSSOP
21 SSOP
—
—
-41 ꢀ to +85 ꢀ
-41 ꢀ to +85 ꢀ
21 Plastic
DIP
MAX3224EEPP
—
-41 ꢀ to +85 ꢀ
All devices are available in a space-saving TQFN,
SSOP, and TSSOP (MAX3224E/MAX3225E/MAX3244E/
MAX3245E) packages.
*Exposed Paddle
Ordering Information continued at end of data sheet.
________________________Applications
_____________________ ꢁelector Guide
Notebook, Subnotebook, and Palmtop ꢀomputers
ꢀellular Phones
NO. OF
DRIVERS/
RECEIVERS
GUARANTEED
DATA RATE
(bps)
Auto-
Shutdown
Plus
READY
OUTPUT
ꢃatterꢄ-Powered Equipment
ꢂand-ꢂeld Equipment
Peripherals
PART
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
MAX3224E
MAX3225E
MAX3226E
MAX3227E
MAX3244E
MAX3245E
2/2
2/2
±/±
±/±
3/5
3/5
251k
±M
Printers
251k
±M
†
Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577;
4,797,899; 4,809,152; 4,897,774; 4,999,761; 5,649,210; and other
patents pending.
251k
±M
—
—
AutoShutdown Plus, MegaBaud, and UCSP are trademarks of
Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps, 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
ABSOLUTE MAXIMUM RATINGS
ꢀꢀ
V
to ꢁND..............................................................-1.3V to +6V
21-Pin TQFN (derate 2±.3mW/°ꢀ above +71°ꢀ) ....±712.±mW
21-Pin Plastic DIP (derate ±±.±±mW/°ꢀ above +71°ꢀ) ...889mW
21-Pin SSOP (derate 8.11mW/°ꢀ above +71°ꢀ) .........641mW
21-Pin TSSOP (derate ±1.9mW/°ꢀ above +71°ꢀ) .......879mW
28-Pin Wide SO (derate ±2.5mW/°ꢀ above +71°ꢀ)............±W
28-Pin SSOP (derate 9.52mW/°ꢀ above +71°ꢀ) .........762mW
28-Pin TSSOP (derate ±2.8mW/°ꢀ above +71°ꢀ) .......±126mW
36-Pin Thin QFN (derate 26.3mW/°ꢀ above +71°ꢀ).....2±15mW
Operating Temperature Ranges
V+ to ꢁND (Note ±)..................................................-1.3V to +7V
V- to ꢁND (Note ±) ...................................................+1.3V to -7V
V+ + V- (Note ±) ................................................................+±3V
Input Voltages
T_IN, FORꢀEON, FORCEOFF to ꢁND................ -1.3V to +6V
R_IN to ꢁND ....................................................................±25V
Output Voltages
T_OUT to ꢁND.............................................................±±3.2V
R_OUT, INVALID, READY to ꢁND .........-1.3V to (V
Short-ꢀircuit Duration
T_OUT to ꢁND .......................................................ꢀontinuous
+ 1.3V)
MAX32_ _Eꢀ_ _ .................................................1°ꢀ to +71°ꢀ
MAX32_ _EE_ _................................................-41°ꢀ to +85°ꢀ
Storage Temperature Range.............................-65°ꢀ to +±61°ꢀ
Lead Temperature (soldering, ±1s) .................................+311°ꢀ
ꢀꢀ
ꢀontinuous Power Dissipation (T = +71°ꢀ)
A
±6-Pin SSOP (derate 7.±4mW/°ꢀ above +71°ꢀ) .........57±mW
±6-Pin TSSOP (derate 9.4mW/°ꢀ above +71°ꢀ) ......754.7mW
Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed ±3V.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
ꢀꢀ
(V
= +3V to +5.5V, ꢀ±–ꢀ4 = 1.±µF, tested at 3.3V ±±10% ꢀ = 1.147µF, ꢀ2–ꢀ4 = 1.33µF, tested at 5.1V ±±10% T = T
to T
,
MAX
L
A
MIN
unless otherwise noted. Tꢄpical values are at T = +25°ꢀ.)
A
PARAMETER
SYMBOL
= 3.3V or 5.1V, T = +25°ꢀ)
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS (V
ꢀꢀ
A
Supplꢄ ꢀurrent,
AutoShutDown Plus
FORꢀEON = ꢁND, FORCEOFF = V
all R_IN idle, all T_IN idle
,
ꢀꢀ
±
±
±1
±1
±
µA
µA
Supplꢄ ꢀurrent, Shutdown
Supplꢄ ꢀurrent,
AutoShutDown Plus Disabled
FORCEOFF = ꢁND
1.3
mA
FORꢀEON = FORCEOFF = V , no load
ꢀꢀ
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold Low
1.8
V
V
T_IN, FORꢀEON, FORCEOFF
V
ꢀꢀ
ꢀꢀ
= 3.3V
= 5.1V
2
T_IN, FORꢀEON,
Input Logic Threshold ꢂigh
FORCEOFF
V
2.4
Transmitter Input ꢂꢄsteresis
Input Leakage ꢀurrent
1.5
V
±1.1±
±±
±±1
1.4
µA
T_IN, FORꢀEON, FORCEOFF
R_OUT (MAX3244E/MAX3245E), receivers
disabled
Output Leakage ꢀurrent
±1.15
µA
Output Voltage Low
Output Voltage ꢂigh
RECEIVER INPUTS
Input Voltage Range
I
I
= ±.6mA
= -±.1mA
V
V
OUT
V
ꢀꢀ
- 1.6 V
- 1.±
ꢀꢀ
OUT
-25
1.6
1.8
+25
V
V
V
ꢀꢀ
V
ꢀꢀ
V
ꢀꢀ
V
ꢀꢀ
= 3.3V
= 5.1V
= 3.3V
= 5.1V
±.2
Input Threshold Low
Input Threshold ꢂigh
T
T
= +25°ꢀ
= +25°ꢀ
A
±.5
±.5
±.8
1.5
5
2.4
2.4
V
A
Input ꢂꢄsteresis
Input Resistance
V
k
T
A
= +25°ꢀ
3
7
2
_______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps, 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
ELECTRICAL CHARACTERISTICS (continued)
(V
= +3V to +5.5V, ꢀ±–ꢀ4 = 1.±µF, tested at 3.3V ±±10% ꢀ = 1.147µF, ꢀ2–ꢀ4 = 1.33µF, tested at 5.1V ±±10% T = T
to T
,
MAX
ꢀꢀ
L
A
MIN
unless otherwise noted. Tꢄpical values are at T = +25°ꢀ.)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TRANSMITTER OUTPUTS
All transmitter outputs loaded with 3k to
ground
Output Voltage Swing
±5
±5.4
±1M
V
Output Resistance
V
ꢀꢀ
= V+ = V- = 1, transmitter outputs = ±2V
311
Output Short-ꢀircuit ꢀurrent
±61
±25
mA
µA
V
= 1 or 3V to 5.5V, V
= ±±2V,
ꢀꢀ
OUT
Output Leakage ꢀurrent
Transmitters disabled
MOUSE DRIVEABILITY (MAX3244E/MAX3245E)
T±IN = T2IN = ꢁND, T3IN = V
,
ꢀꢀ
T3OUT loaded with 3k to ꢁND,
T±OUT and T2OUT loaded with
2.5mA each
Transmitter Output Voltage
ESD PROTECTION
R_IN, T_OUT
±5
V
IEꢀ±111-4-2 Air Discharge
IEꢀ±111-4-2 ꢀontact Discharge
ꢂuman ꢃodꢄ Model
±±5
±8
kV
±±5
AutoShutdown Plus (FORꢀEON = ꢁND, FORCEOFF = V
)
ꢀꢀ
Positive threshold
Negative threshold
2.7
Receiver Input Threshold to
Figure 4a
V
V
INVALID Output ꢂigh
-2.7
-1.3
Receiver Input Threshold to
Figure 4a
1.3
1.4
INVALID Output Low
INVALID, READY
Output Voltage Low
(MAX3224E–MAX3227E)
I
= -±.6mA
= -±.1mA
V
V
OUT
OUT
INVALID, READY
Output Voltage ꢂigh
(MAX3224E–MAX3227E)
I
V
- 1.6
ꢀꢀ
Receiver Positive or Negative
Threshold to INVALID ꢂigh
t
V
ꢀꢀ
V
ꢀꢀ
V
ꢀꢀ
V
ꢀꢀ
= 5V, Figure 4b
= 5V, Figure 4b
±
µs
µs
µs
s
INVꢂ
Receiver Positive or Negative
Threshold to INVALID Low
t
31
INVL
Receiver or Transmitter Edge to
Transmitters Enabled
t
= 5V, Figure 5b (Note 2)
= 5V, Figure 5b (Note 2)
±11
31
WU
Receiver or Transmitter Edge to
Transmitters Shutdown
tAUTOSꢂDN
±5
61
_______________________________________________________________________________________
3
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps, 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
TIMING CHARACTERISTICS—MAX3224E/MAX3226E/MAX3244E
(V
= +3V to +5.5V, ꢀ±–ꢀ4 = 1.±µF, tested at 3.3V ±±10% ꢀ = 1.147µF, ꢀ2–ꢀ4 = 1.33µF, tested at 5.1V ±±10% T = T
to T
,
MAX
ꢀꢀ
L
A
MIN
unless otherwise noted. Tꢄpical values are at T = +25°ꢀ.)
A
PARAMETER
SYMBOL
CONDITIONS
R = 3k , ꢀ = ±111pF,
one transmitter switching
MIN
TYP
MAX
UNITS
L
L
Maximum Data Rate
251
kbps
t
t
1.±5
1.±5
211
211
±11
51
PꢂL
Receiver Propagation Delaꢄ
R_IN to R_OUT, ꢀ = ±51pF
L
µs
PLꢂ
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Normal operation (MAX3244E onlꢄ)
Normal operation (MAX3244E onlꢄ)
(Note 3)
ns
ns
ns
ns
t
t
- t
PꢂL PLꢂ
Receiver Skew
- t
PꢂL PLꢂ
V
= 3.3V, T = +25°ꢀ,
A
ꢀꢀ
R = 3k to 7k ,
L
ꢀ = ±51pF
L
to ±111pF
Transition-Region Slew Rate
measured from +3V to -3V
or -3V to +3V, one trans-
mitter switching
6
31
V/µs
TIMING CHARACTERISTICS—MAX3225E/MAX3227E/MAX3245E
(V
= +3V to +5.5V, ꢀ±–ꢀ4 = 1.±µF, tested at 3.3V ±±10% ꢀ = 1.147µF, ꢀ2–ꢀ4 = 1.33µF, tested at 5.1V ±±10% T = T
to T
,
MAX
ꢀꢀ
L
A
MIN
unless otherwise noted. Tꢄpical values are at T = +25°ꢀ.)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
R = 3k , ꢀ = ±111pF,
one transmitter switching
L
L
251
V
= 3.1V to 4.5V, R = 3k ,
ꢀꢀ
L
L
Maximum Data Rate
±111
±111
kbps
ꢀ = 251pF, one transmitter switching
V
= 4.5V to 5.5V, R = 3k ,
L
ꢀꢀ
L
ꢀ = ±111pF, one transmitter switching
t
t
1.±5
1.±5
211
211
25
PꢂL
PLꢂ
Receiver Propagation Delaꢄ
R_IN to R_OUT, ꢀ = ±51pF
L
µs
Receiver Output Enable Time
Receiver Output Disable Time
Transmitter Skew
Normal operation (MAX3245E onlꢄ)
Normal operation (MAX3245E onlꢄ)
(Note 3)
ns
ns
ns
ns
t
t
- t
PꢂL PLꢂ
Receiver Skew
- t
51
PꢂL PLꢂ
V
= 3.3V, T = +25°ꢀ,
A
ꢀꢀ
R = 3k to 7k , ꢀ = ±51pF to ±111pF,
measured from +3V to -3V or -3V to +3V,
one transmitter switching
L
L
Transition-Region Slew Rate
24
±51
V/µs
Note 2: A transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic thresholds.
Note 3: Transmitter skew is measured at the transmitter zero cross points.
4
_______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps, 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
__________________________________________Typical Operating Characteristics
(V
= +3.3V, 251kbps data rate, 1.±µF capacitors, all transmitters loaded with 3k and ꢀ , T = +25°ꢀ, unless otherwise noted.)
L
ꢀꢀ
A
MAX3224E/MAX3226E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3224E/MAX3226E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3224E/MAX3226E
SLEW RATE vs. LOAD CAPACITANCE
16
14
12
10
8
45
40
35
30
25
20
15
10
5
6
5
4
3
2
1
0
V
OUT+
250kbps
T1 TRANSMITTING AT 250kbps
T2 (MAX3224E) TRANSMITTING AT 15.6kbps
-SLEW
120kbps
+SLEW
-1
-2
-3
-4
-5
-6
6
20kbps
4
T1 TRANSMITTING AT 250kbps
T2 (MAX3224E) TRANSMITTING AT 15.6kbps
2
V
OUT-
FOR DATA RATES UP TO 250kbps
0
0
0
1000
2000
3000
4000
5000
0
1000
2000
3000
4000
5000
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3225E/MAX3227E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3225E/MAX3227E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3225E/MAX3227E
SLEW RATE vs. LOAD CAPACITANCE
100
90
80
70
60
50
40
30
20
10
0
80
70
60
50
40
30
20
10
0
7.5
5.0
2.5
0
1 TRANSMITTER AT FULL DATA RATE
1 TRANSMITTER AT 1/16 DATA RATE
(MAX3225E)
LOAD = 3k + C
2Mbps
L
-SLEW
+SLEW
1.5Mbps
1Mbps
2Mbps
1 TRANSMITTER AT FULL DATA RATE
1 TRANSMITTER AT 1/16 DATA RATE
(MAX3225E)
1.5Mbps
LOAD = 3k + C
L
1.5Mbps
2Mbps
1Mbps
-2.5
-5.0
-7.5
1Mbps
1 TRANSMITTER AT 1Mbps
1 TRANSMITTER AT 62.5kbps (MAX3225E)
0
500
1000
1500
2000
2500
0
500
1000
1500
2000
2500
0
500
1000
1500
2000
2500
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3225E/MAX3227E
TRANSMITTER SKEW
vs. LOAD CAPACITANCE
MAX3224E–MAX3227E
READY TURN-OFF TIME
vs. TEMPERATURE
MAX3224E–MAX3227E
READY TURN-ON TIME
vs. TEMPERATURE
50
45
40
35
30
25
20
15
10
5
200
38
1 TRANSMITTER AT 512kbps
1 TRANSMITTER AT 30kbps
(MAX3225E)
180
160
140
120
100
80
36
34
32
30
28
26
24
22
20
LOAD = 3k + C
L
AVERAGE: 10 PARTS
60
40
20
0
0
0
500 1000 1500 2000 2500 3000
LOAD CAPACITANCE (pF)
-40 -20
0
20
40
60
80 100
-40 -20
0
20
40
60
80 100
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps, 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
_____________________________Typical Operating Characteristics (continued)
(V = +3.3V, 251kbps data rate, 1.±µF capacitors, all transmitters loaded with 3k and ꢀ , T = +25°ꢀ, unless otherwise noted.)
L
ꢀꢀ
A
MAX3244E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3244E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
MAX3244E
SLEW RATE vs. LOAD CAPACITANCE
6
5
4
3
2
1
0
14
12
10
8
60
50
40
30
20
10
0
1 TRANSMITTER AT 250kbps
2 TRANSMITTERS AT 15.6kbps
V
OUT+
1 TRANSMITTER AT 250kbps
2 TRANSMITTERS AT 15.6kbps
250kbps
120kbps
6
-1
-2
-3
-4
-5
-6
20kbps
4
2
V
OUT-
0
0
1000
2000
3000
4000
5000
0
1000
2000
3000
4000
5000
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3245E
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3245E
SLEW RATE vs. LOAD CAPACITANCE
7.5
5.0
2.5
0
70
60
50
40
30
20
10
0
2Mbps
1.5Mbps
1Mbps
1 TRANSMITTER AT FULL DATA RATE
2 TRANSMITTERS AT 1/16 DATA RATE
1.5Mbps
2Mbps
-2.5
-5.0
-7.5
1Mbps
1 TRANSMITTER AT 1Mbps
2 TRANSMITTERS AT 62.5kbps
0
400
800
1200
1600
2000
0
400
800
1200
1600
2000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3245E
TRANSMITT SKEW
vs. LOAD CAPACITANCE
MAX3245E
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
50
45
40
35
30
25
20
15
10
5
100
90
80
70
60
50
40
30
20
10
0
2Mbps
1.5Mbps
1Mbps
1 TRANSMITTER AT FULL DATA RATE
2 TRANSMITTERS AT 1/16 DATA RATE
0
0
1000
2000
3000
0
400
800
1200
1600
2000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
6
_______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps, 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
______________________________________________________________ -in Description
PIN
MAX3224E
MAX3225E
MAX3226E
MAX3227E
MAX3244E
MAX3245E
SO/ SSOP/ TSSOP
MAX3245E
(TQFN)
NAME
FUNCTION
DIP/
SSOP/
TQFN
SSOP/
TQFN
TSSOP
TSSOP
Readꢄ to Transmit Output,
active-high. READY is
±9
±
±4
±
—
—
READY
enabled high when V- goes
below -4V and the device is
readꢄ to transmit.
Positive Terminal of Voltage-
Doubler ꢀharge-Pump
ꢀapacitor
±
21
2
2
3
4
±6
±5
±
2
3
4
28
27
24
3±
31
26
ꢀ±+
V+
+5.5V generated bꢄ the
charge pump
Negative Terminal of
Voltage-Doubler ꢀharge-
Pump ꢀapacitor
ꢀ±-
Positive Terminal of
Inverting ꢀharge-Pump
ꢀapacitor
3
5
2
5
±
33
ꢀ2+
Negative Terminal of
Inverting ꢀharge-Pump
ꢀapacitor
4
5
6
7
3
4
6
7
2
3
34
35
ꢀ2-
V-
-5.5V ꢁenerated bꢄ the
ꢀharge Pump
6, ±5
7, ±4
8, ±7
9, ±6
±1
5
±3
8
9, ±1, ±±
4-8
7, 8, 9
±-5
T_OUT
R_IN
RS-232 Transmitter Outputs
RS-232 Receiver Inputs
±5, ±6, ±7,
±9, 21
TTL/ꢀMOS Receiver
Outputs
8, ±3
±1, ±5
6
9
R_OUT
±5-±9
Valid Signal Detector
Output, active low. A logic
high indicates that a valid
RS-232 level is present on a
receiver input.
9
±±
7
±1
2±
23
INVALID
_______________________________________________________________________________________
7
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
______________________________________________________________ -in Description
PIN
MAX3224E
MAX3225E
MAX3226E
MAX3227E
MAX3244E
MAX3245E
DIP/ SSOP/ TSSOP
MAX3245E
(TQFN)
FUNCTION
NAME
DIP/
SSOP/
TSSOP
TQFN
SSOP/
TQFN
TSSOP
TTL/ꢀMOS Transmitter
Inputs
±1, ±±
±2, ±3
±4
8
±±
±2-±4
23
±±, ±2, ±3
25
T_IN
Force-On Input, Active ꢂigh.
Drive high to override
AutoShutdown Plus, keeping
transmitters and receivers
on (FORꢀEOFF must be
high) (Table ±).
±2
9
±2
FORꢀEON
ꢁND
±6
±7
±8
±9
±±
±2
±4
±5
25
26
27
29
ꢁround
+3.1V to +5.5V Single
Supplꢄ Voltage
V
ꢀꢀ
Force-Off Input, Active Low.
Drive low to shut down
transmitters, receivers
(except R2OUTꢃ), and
charge pump. This
±8
21
±3
±6
22
24
FORCEOFF
overrides AutoShutdown
Plus and FORꢀEON (Table
±).
TTL/ꢀMOS Noninverting
ꢀomplementarꢄ Receiver
Outputs. Alwaꢄs active.
—
—
—
—
—
—
—
—
—
—
21
—
—
2±
R2OUTꢃ
N.ꢀ.
6, ±1, ±4,
±8, 22, 28,
32, 36
No ꢀonnection. Not
internallꢄ connected.
Exposed Paddle. Solder the
exposed paddle to the
ground plane or leave
unconnected.
EP
EP
—
EP
enabled% if the output voltages exceed 5.5V, the
charge-pump is disabled. Each charge pump requires
a flꢄing capacitor (ꢀ±, ꢀ2) and a reservoir capacitor
(ꢀ3, ꢀ4) to generate the V+ and V- supplies.
_______________Detailed Description
Dual Chargeꢂ-ump koltage Converter
The MAX3224E–MAX3227E/MAX3244E/MAX3245E’s
internal power supplꢄ consists of a regulated dual
charge pump that provides output voltages of +5.5V
(doubling charge pump) and -5.5V (inverting charge
pump), over the +3.1V to +5.5V range. The charge
pump operates in discontinuous mode: if the output
voltages are less than 5.5V, the charge pump is
The READY output (MAX3224E–MAX3227E) is low
when the charge pumps are disabled in shutdown
mode. The READY signal asserts high when V- goes
below -4V.
8
_______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
V
CC
POWER-
MANAGEMENT
UNIT OR
KEYBOARD
CONTROLLER
FORCEOFF
FORCEON
INVALID
PROTECTION
DIODE
PREVIOUS
RS-232
MAX3244E
MAX3245E
V
CC
I
Rx
Tx
5k
UART
GND
SHDN = GND
I/O
CHIP
WITH
UART
CPU
RS-232
a) OLDER RS-232: POWERED-DOWN UART DRAWS CURRENT FROM ACTIVE
RECEIVER OUTPUT IN SHUTDOWN.
V
CC
TO
P
LOGIC
TRANSITION
DETECTOR
MAX3244E
MAX3245E
Figure 1. Interface Under Control of PMU
I
PROTECTION
DIODE
R2OUTB
Rꢁꢂ232 Transmitters
The transmitters are inverting level translators that
convert ꢀMOS-logic levels to 5.1V EIA/TIA-232 levels.
The MAX3224E/MAX3226E/MAX3244E guarantee a
251kbps data rate (±Mbps, for the MAX3225E/MAX3227E/
MAX3245E) with worst-case loads of 3k in parallel with
±111pF, providing compatibilitꢄ with Pꢀ-to-Pꢀ com-
munication software (such as LapLink™). Transmitters
can be paralleled to drive multiple receivers. Figure ±
shows a complete sꢄstem connection.
V
CC
R2IN
Rx
R2OUT
THREE-STATED
UART
5k
T1OUT
T1IN
Tx
GND
FORCEOFF = GND
When FORCEOFF is driven to ground or when the Auto-
Shutdown Plus circuitrꢄ senses that all receiver and
transmitter inputs are inactive for more than 31s, the
transmitters are disabled and the outputs go into a high-
impedance state. When powered off or shut down, the
outputs can be driven to ±±2V. The transmitter inputs
do not have pullup resistors. ꢀonnect unused inputs to
ꢀꢀ
LapLink is a trademark of Traveling Software.
_______________________________________________________________________________________
b) NEW MAX3244E/MAX3245E: IN SHUTDOWN, R2OUTB IS USED TO MONITOR
EXTERNAL DEVICES AND R2OUT IS THREE STATED, ELIMINATING A CURRENT
PATH THROUGH THE UART'S PROTECTION DIODE.
Figure 2. The MAX3244E/MAX3245E detect RS-232 activity
when the UART and interface are shut down.
ꢁND or V
.
9
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
Table 1. Output Control Truth Table
R_OUT
(MAX3224E/
RECEIVER OR
VALID
RECEIVER
LEVEL
R_OUT
R2OUTB
OPERATION
STATUS
TRANSMITTER
EDGE WITHIN
30s
FORCEON
T_OUT MAX3225E/ (MAX3244E/ (MAX3244E/
FORCEOFF
MAX3226E/
MAX3227E)
MAX3245E)
ꢂigh-Z
MAX3245E)
Active
Shutdown
(Forced Off)
X
±
1
±
X
X
X
X
ꢂigh-Z
Active
Active
Active
Normal
Operation
(Forced On)
Active
Active
Normal
Operation
(AutoShutdown
Plus)
1
±
X
Yes
Active
Active
Active
Active
Shutdown (Auto-
Shutdown Plus)
1
±
±
X
No
X
ꢂigh-Z
Active
Active
Active
Active
Active
Active
Active
Normal
Operation
Yes
INVALID*
Normal
Operation
±
±
X
Yes
No
Active
ꢂigh-Z
Active
Active
Active
Active
Active
Active
INVALID*
INVALID*
Shutdown
No
Normal
Operation
(AutoShutdown)
Yes
No
X
X
Active
ꢂigh-Z
Active
Active
Active
ꢂigh-Z
Active
Active
INVALID*
INVALID*
INVALID**
INVALID**
Shutdown
(AutoShutdown)
X = Don’t care
* INVALID connected to FORCEON
** INVALID connected to FORCEON and FORCEOFF
The MAX3224E–MAX3227E/MAX3244E/MAX3245E fea-
ture an INVALID output that is enabled low when no
valid RS-232 voltage levels have been detected on all
receiver inputs. ꢃecause INVALID indicates the receiv-
er input’s condition, it is independent of FORꢀEON and
FORCEOFF states (Figures 3 and 4).
Rꢁꢂ232 Receivers
The receivers convert RS-232 signals to ꢀMOS-logic
output levels. The MAX3224E–MAX3227E feature
inverting outputs that alwaꢄs remain active (Table ±).
The MAX3244E/MAX3245E have inverting three-state
outputs that are high impedance when shut down
(FORCEOFF = ꢁND) (Table ±).
Autoꢁhutdown -lus Mode
The MAX3224E–MAX3227E/MAX3244E/MAX3245E
achieve a ±µA supplꢄcurrent with Maxim’s AutoShutdown
Plus feature, which operates when FORCEOFF is high
and a FORꢀEON is low. When these devices do not
sense a valid signal transition on anꢄ receiver and trans-
mitter input for 31s, the on-board charge pumps are
shut down, reducing supplꢄ current to ±µA. This occurs
if the RS-232 cable is disconnected or if the connected
The MAX3244E/MAX3245E feature an extra, alwaꢄs
active, noninverting output, R2OUTꢃ. R2OUTꢃ output
monitors receiver activitꢄ while the other receivers are
high impedance, allowing ring indicator applications to
be monitored without forward biasing other devices
connected to the receiver outputs. This is ideal for sꢄs-
tems where V
is set to ground in shutdown to
ꢀꢀ
accommodate peripherals such as UARTs (Figure 2).
10 ______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
EDGE
DETECT
+0.3V
T_IN
FORCEOFF
S
30s
TIMER
R_IN
-0.3V
AUTOSHDN
30µs
TIMER
R
EDGE
DETECT
INVALID
R_IN
R
INVALID ASSERTED IF ALL RECEIVER INPUTS ARE BETWEEN +0.3V AND -0.3V FOR
AT LEAST 30 s.
FORCEON
Figure 3a. INVALID Functional Diagram, INVALID Low
Figure 3c. AutoShutdown Plus Logic
+2.7V
FORCEOFF
POWERDOWN*
FORCEON
R_IN
30µs
TIMER
R
AUTOSHDN
INVALID
-2.7V
* POWERDOWN IS ONLY AN INTERNAL SIGNAL.
IT CONTROLS THE OPERATIONAL STATUS OF
THE TRANSMITTERS AND THE POWER SUPPLIES.
INVALID DEASSERTED IF ANY RECEIVER INPUT HAS BEEN BETWEEN +2.7V AND -2.7V
FOR LESS THAN 30 s.
Figure 3d. Power-Down Logic
Figure 3b. INVALID Functional Diagram, INVALID High
When shut down, the device’s charge pumps turn off,
V+ is pulled to V , V- is pulled to ground, the transmit-
ꢀꢀ
Table 2. INVALID Truth Table
ter outputs are high impedance, and READY
(MAX3224E–MAX3227E) is driven low. The time
required to exit shutdown is tꢄpicallꢄ ±11µs (Figure 8).
RS-232 SIGNAL
PRESENT AT ANY
RECEIVER INPUT
INVALID OUTPUT
ꢃꢄ connecting FORꢀEON to INVALID, the MAX3224E–
MAX3227E/MAX3244E/MAX3245E shut down when no
valid receiver level and no receiver or transmitter edge is
detected for 31s, and wake up when a valid receiver
level or receiver or transmitter edge is detected.
Yes
No
ꢂigh
Low
peripheral transmitters are turned off, and the UART dri-
ving the transmitter inputs is inactive. The sꢄstem turns
on again when a valid transition is applied to anꢄ
RS-232 receiver or transmitter input. As a result, the sꢄs-
tem saves power without changes to the existing ꢃIOS
or operating sꢄstem.
INVALID HIGH
+2.7V
INDETERMINATE
Figures 3a and 3b depict valid and invalid RS-232
receiver voltage levels. INVALID indicates the receiver
input’s condition, and is independent of FORꢀEON and
FORCEOFF states. Figure 3 and Tables ± and 2 sum-
marize the operating modes of the MAX3224E–
MAX3227E/MAX3244E/MAX3245E. FORꢀEON and
FORCEOFF override AutoShutdown Plus circuitrꢄ.
When neither control is asserted, the Iꢀ selects
between these states automaticallꢄ based on the last
receiver or transmitter input edge received.
+0.3V
0
INVALID LOW
INDETERMINATE
INVALID HIGH
-0.3V
-2.7V
Figure 4a. Receiver Positive/Negative Thresholds for INVALID
______________________________________________________________________________________ 11
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
RECEIVER
INPUTS
INVALID
REGION
}
TRANSMITTER
INPUTS
TRANSMITTER
OUTPUTS
V
INVALID
OUTPUT
CC
t
INVL
t
INVH
t
0
AUTOSHDN
t
AUTOSHDN
t
t
WU
WU
*V
CC
OUTPUT
0
V+
V
CC
0
V-
*MAX3224E–MAX3227E
Figure 4b. AutoShutdown Plus, INVALID, and READY Timing Diagram
discharges encountered during handling and assemblꢄ.
The driver outputs and receiver inputs of the
MAX3224E–MAX3227E/MAX3244E/MAX3245E have extra
protection against static electricitꢄ. Maxim’s engineers
have developed state-of-the-art structures to protect
ꢃꢄ connecting FORꢀEON and FORCEOFF to INVALID,
the MAX3224E–MAX3227E/MAX3244E/MAX3245E shut
down when no valid receiver level is detected and
wake up when a valid receiver level is detected (same
functionalitꢄ as AutoShutdown feature on MAX322±E/
MAX3223E/MAX3243E).
A mouse or other sꢄstem with AutoShutdown Plus maꢄ
need time to wake up. Figure 5 shows a circuit that
forces the transmitters on for ±11ms, allowing enough
time for the other sꢄstem to realize that the MAX3244E/
MAX3245E is awake. If the other sꢄstem outputs valid
RS-232 signal transitions within that time, the RS-232
ports on both sꢄstems remain enabled.
POWER-
MASTER SHDN LINE
MANAGEMENT
0.1 F
1M
UNIT
FORCEOFF FORCEON
MAX3224E
MAX3225E
MAX3226E
MAX3227E
MAX3244E
MAX3245E
ꢁoftwareꢂControlled ꢁhutdown
If direct software control is desired, use INVALID to
indicate DTR or ring indicator signal. Tie FORCEOFF
and FORꢀEON together to bꢄpass the AutoShutdown
Plus so the line acts like a SHDN input.
±±5ꢀk EꢁD -rotection
As with all Maxim devices, ESD-protection structures are
incorporated on all pins to protect against electrostatic
Figure 5. AutoShutdown Plus Initial Turn-On to Wake Up a
Mouse or Another System
12 ______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
R
50M to 100M
R 330
D
C
R
1M
R 1500
D
C
DISCHARGE
RESISTANCE
CHARGE CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
CHARGE-CURRENT
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
C
s
150pF
STORAGE
CAPACITOR
C
100pF
STORAGE
CAPACITOR
s
SOURCE
SOURCE
Figure 6a. Human Body ESD Test Model
Figure 7a. IEC1000-4-2 ESD Test Model
I
100%
90%
I 100%
P
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I
r
AMPERES
36.8%
10%
0
TIME
0
t
RL
t
DL
CURRENT WAVEFORM
10%
Figure 6b. Human Body Current Waveform
t
t = 0.7ns to 1ns
r
30ns
60ns
these pins against ESD of ±±5kV without damage. The
ESD structures withstand high ESD in all states: normal
operation, shutdown, and powered down. After an ESD
event, Maxim’s E versions keep working without
latchup, whereas competing RS-232 products can
latch and must be powered down to remove latchup.
Figure 7b. IEC1000-4-2 ESD Generator Current Waveform
ESD Test Conditions
ESD performance depends on a varietꢄ of conditions.
ꢀontact Maxim for a reliabilitꢄ report that documents
test setup, test methodologꢄ, and test results.
ESD protection can be tested in various waꢄs% the
transmitter outputs and receiver inputs of this product
familꢄ are characterized for protection to the following
limits:
Human Body Model
Figure 6a shows the ꢂuman ꢃodꢄ Model and Figure 6b
shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
a ±11pF capacitor charged to the ESD voltage of inter-
est, which is then discharged into the test device
through a ±.5k resistor.
±) ±±5kV using the ꢂuman ꢃodꢄ Model
2) ±8kV using the ꢀontact-Discharge Method specified
in IEꢀ±111-4-2
3) ±±5kV using IEꢀ±111-4-2’s Air-ꢁap Method.
______________________________________________________________________________________ 13
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
IEC1000-4-2
The IEꢀ±111-4-2 standard covers ESD testing and per-
5V/div
0
FORCEON = FORCEOFF
T1OUT
formance of finished equipment% it does not specificallꢄ
refer to integrated circuits. The MAX3224E–MAX3227E,
MAX3244E/MAX3245E help ꢄou design equipment that
meets Level 4 (the highest level) of IEꢀ±111-4-2, with-
out the need for additional ESD-protection components.
2V/div
0
The major difference between tests done using the
ꢂuman ꢃodꢄ Model and IEꢀ±111-4-2 is higher peak
current in IEꢀ±111-4-2, because series resistance is
lower in the IEꢀ±111-4-2 model. ꢂence, the ESD with-
stand voltage measured to IEꢀ±111-4-2 is generallꢄ
lower than that measured using the ꢂuman ꢃodꢄ
Model. Figure 7a shows the IEꢀ±111-4-2 model and
Figure 7b shows the current waveform for the 8kV,
IEꢀ±111-4-2, Level 4, ESD ꢀontact-Discharge Method.
T2OUT
READY
V
= 3.3V
CC
5V/div
0
C1–C4 = 0.1 F
5 s/div
Figure 8. Transmitter Outputs when Exiting Shutdown or
Powering Up
The Air-ꢁap Method involves approaching the device
with a charged probe. The ꢀontact-Discharge Method
connects the probe to the device before the probe is
energized.
can be used. The charge pump requires 1.±µF capaci-
tors for 3.3V operation. For other supplꢄ voltages, see
Table 3 for required capacitor values. Do not use val-
ues smaller than those listed in Table 3. Increasing the
capacitor values (e.g., bꢄ a factor of 2) reduces ripple
on the transmitter outputs and slightlꢄ reduces power
consumption. ꢀ2, ꢀ3, and ꢀ4 can be increased without
changing ꢀ±’s value. However, do not increase C1
without also increasing the values of C2, C3, C4,
Machine Model
The Machine Model for ESD tests all pins using a
211pF storage capacitor and zero discharge resis-
tance. Its objective is to emulate the stress caused bꢄ
contact that occurs with handling and assemblꢄ during
manufacturing. Of course, all pins require this protec-
tion during manufacturing, not just RS-232 inputs and
outputs. Therefore, after Pꢀ board assemblꢄ, the
Machine Model is less relevant to I/O ports.
and C
the other capacitors).
, to maintain the proper ratios (C1 to
BYPASS
When using the minimum required capacitor values,
make sure the capacitor value does not degrade
excessivelꢄ with temperature. If in doubt, use capaci-
tors with a larger nominal value. The capacitor’s equiv-
alent series resistance (ESR), which usuallꢄ rises at low
temperatures, influences the amount of ripple on V+
and V-.
__________Applications Information
Capacitor ꢁelection
The capacitor tꢄpe used for ꢀ±–ꢀ4 is not critical for
proper operation% polarized or nonpolarized capacitors
Table 3. Required Minimum Capacitance
Values
-owerꢂꢁupply Decoupling
In most circumstances, a 1.±µF V
bꢄpass capacitor
ꢀꢀ
is adequate. In applications that are sensitive to power-
supplꢄ noise, use a capacitor of the same value as
charge-pump capacitor ꢀ±. ꢀonnect bꢄpass capaci-
tors as close to the Iꢀ as possible.
V
(V)
C1, C
C2, C3, C4
(µF)
BYPASS
CC
(µF)
1.22
1.±
3.1 to 3.6
3.±5 to 3.6
4.5 to 5.5
3.1 to 5.5
1.22
1.±
1.33
±
Transmitter Outputs
when Exiting ꢁhutdown
1.147
1.22
Figure 8 shows two transmitter outputs when exiting
shutdown mode. As theꢄ become active, the two trans-
mitter outputs are shown going to opposite RS-232 lev-
els (one transmitter input is high, the other is low). Each
14 ______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
transmitter is loaded with 3k in parallel with ±111pF.
The transmitter outputs displaꢄ no ringing or undesir-
able transients as theꢄ come out of shutdown. Note that
the transmitters are enabled onlꢄ when the magnitude
5V/div
5V/div
5V/div
T1IN
of V- exceeds approximatelꢄ -3V.
High Data Rates
The MAX3224E/MAX3226E/MAX3244E maintain the
RS-232 ±5.1V minimum transmitter output voltage even
at high data rates. Figure 9 shows a transmitter loop-
back test circuit. Figure ±1 shows a loopback test result
at ±21kbps, and Figure ±± shows the same test at
251kbps. For Figure ±1, all transmitters were driven
simultaneouslꢄ at ±21kbps into RS-232 loads in parallel
with ±111pF. For Figure ±±, a single transmitter was dri-
ven at 251kbps, and all transmitters were loaded with
an RS-232 receiver in parallel with 251pF.
T1OUT
R1OUT
V
CC
= 3.3V
2 s/div
Figure 10. MAX3224E/MAX3226E/MAX3244E Loopback Test
Result at 120kbps
The MAX3225E/MAX3227E/MAX3245E maintain the
RS-232 ±5.1V minimum transmitter output voltage at
data rates up to ±Mbps (Megaꢃaud). Figure ±2 shows
a loopback test result with a single transmitter driven at
±Mbps and all transmitters loaded with an RS-232
receiver in parallel with 251pF.
5V/div
5V/div
5V/div
T1IN
T1OUT
R1OUT
V
CC
C
BYPASS
V
CC
2 s/div
C1+
V+
V-
C3*
C4
C1
C2
Figure 11. MAX3224E/MAX3226E/MAX3244E Loopback Test
Result at 250kbps
MAX3224E
MAX3225E
MAX3226E
MAX3227E
MAX3244E
MAX3245E
C1-
C2+
C2-
5V/div
5V/div
5V/div
T1IN
T_ OUT
T_ IN
R_ IN
5k
R_ OUT
T1OUT
1000pF
FORCEON
FORCEOFF
V
CC
R1OUT
GND
V
CC
= 3.3V
200ns/div
*C3 CAN BE RETURNED TO V OR GND.
CC
Figure 12. MAX3225E/MAX3227E/MAX3245E Loopback Test
Result at 1Mbps
Figure 9. Loopback Test Circuit
______________________________________________________________________________________ 15
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
+3.3V
26
0.1 F
V
CC
27
3
28
C1+
V+
C1
0.1 F
C3
0.1 F
24
1
C1-
C2+
COMPUTER SERIAL PORT
MAX3244E
MAX3245E
V-
C4
C2
0.1 F
0.1 F
2
C2-
+V
+V
-V
T1IN
T1OUT
9
14
T2IN
T3IN
LOGIC
INPUTS
T2OUT 10
13
12
11
T3OUT
GND
Tx
R2OUTB
20
R1OUT
R2OUT
R3OUT
R1IN
R2IN
4
5
19
18
17
5k
5k
5k
LOGIC
OUTPUTS
6
7
8
R3IN
R4IN
R5IN
RS-232
INPUTS
R4OUT
R5OUT
16
5k
5k
SERIAL
MOUSE
15
23
FORCEON
FORCEOFF
INVALID
22
21
V
CC
TO POWER-
MANAGEMENT
UNIT
GND
25
Figure 13a. Mouse Driver Test Circuit
16 ______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
Mouse Driveability
6
The MAX3244E/MAX3245E are specificallꢄ designed to
5
power serial mice while operating from low-voltage
V
4
3
OUT+
power supplies. Theꢄ have been tested with leading
mouse brands from manufacturers such as Microsoft
and Logitech. The MAX3244E/MAX3245E successfullꢄ
drove all serial mice tested and met their respective
current and voltage requirements. The MAX3244E/
MAX3245E dual charge pump ensures the transmitters
supplꢄ at least ±5V during worst-case conditions.
Figure ±3b shows the transmitter output voltages under
increasing load current. Figure ±3a shows a tꢄpical
mouse connection.
V
= 3.0V
CC
2
V
V
1
OUT+
0
-1
-2
-3
-4
-5
-6
V
CC
1
OUT-
V
OUT-
0
2
3
4
5
6
7
8
9
10
Interconnection with 3k and 5k Logic
The MAX3224E–MAX3227E/MAX3244E/MAX3245E can
directlꢄ interface with various 5V logic families, includ-
ing AꢀT and ꢂꢀT ꢀMOS. See Table 4 for more informa-
tion on possible combinations of interconnections.
LOAD CURRENT PER TRANSMITTER (mA)
Figure 13b. MAX324_E Transmitter Output Voltage vs. Load
Current per Transmitter
Table 5 lists other Maxim ESD-powered transceivers.
Table 4. Logic Family Compatibility with Various Supply Voltages
SYSTEM
V
SUPPLY
CC
POWER-SUPPLY
VOLTAGE (V)
VOLTAGE
(V)
COMPATIBILITY
3.3
5
3.3
5
ꢀompatible with all ꢀMOS families
ꢀompatible with all TTL and ꢀMOS families
5
3.3
ꢀompatible with AꢀT and ꢂꢀT ꢀMOS, and with Aꢀ, ꢂꢀ, or ꢀD4111 ꢀMOS
Table 5. 15kV ESD-Protected, 3.0V to 5.5V Powered RS-232 Transceivers from Maxim
SUPPLY
VOLTAGE
RANGE
(V)
Human IEC 1000-4-2 IEC 1000-4-2
NO. SUPPLY
OF CURRENT Shutdown
Auto-
GUARANTEED
DATA RATE
(kbps)
Auto-
Body
Contact
Discharge
(kV)
Air-Gap
Discharge
(kV)
PART
Shutdown Model
(kV)
Tx/Rx
(µA)
Plus
MAX324±E +3.1 to +5.5
MAX3243E +3.1 to +5.5
MAX3244E +3.1 to +5.5
MAX3245E +3.1 to +5.5
MAX3232E +3.1 to +5.5
MAX3222E +3.1 to +5.5
MAX3223E +3.1 to +5.5
MAX3224E +3.1 to +5.5
MAX3225E +3.1 to +5.5
MAX322±E +3.1 to +5.5
MAX3226E +3.1 to +5.5
MAX3227E +3.1 to +5.5
3/5
3/5
3/5
3/5
2/2
2/2
2/2
2/2
2/2
±/±
±/±
±/±
311
±
—
—
—
Yes
—
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±8
±8
±8
±8
±8
±8
±8
±8
±8
±8
±8
±8
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±±5
±±5
251
251
±
Yes
Yes
—
251
±
—
±Mbps
251
311
311
±
—
—
—
251
—
Yes
—
251
±
Yes
Yes
—
251
±
—
±Mbps
251
±
Yes
—
±
Yes
Yes
251
±
—
±Mbps
______________________________________________________________________________________ 17
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
___________________________________________________Typical Operating Circuits
+3.3V
+3.3V
15
C
26
BYPASS
0.1 F
0.1 F
2
C
BYPASS
V
V
CC
CC
3
7
27
3
28
C1+
C1+
V+
V-
V+
C1
0.1 F
C1
0.1 F
C3
0.1 F
C3
0.1 F
4
5
6
24
1
C1-
C2+
C1-
C2+
MAX3226E*
MAX3227E
MAX3244E***
MAX3245E
V-
C4
0.1 F
C2
0.1 F
C2
0.1 F
C4
2
0.1 F
C2-
C2-
T1IN
11
9
T1IN
T1OUT 13
T1OUT
9
14
T2IN
T3IN
T2OUT 10
13
12
R1OUT
R1IN
5k
8
11
21
T3OUT
FORCEOFF
FORCEON
22
23
TO POWER-
MANAGEMENT
UNIT
READY
INVALID 10
1
INVALID
AUTOSHUTDOWN
PLUS
AUTOSHUTDOWN
PLUS
FORCEOFF
FORCEON
16
12
V
CC
R2OUTB
R1OUT
20
19
GND
14
R1IN
R2IN
4
5
+3.3V
19
C
0.1 F
2
BYPASS
R2OUT
R3OUT
R4OUT
V
18
17
16
CC
3
7
C1+
V+
V-
C1
C3
0.1 F
4
5
6
0.1 F
C1-
C2+
MAX3224E**
MAX3225E
6
7
R3IN
R4IN
C4
0.1 F
C2
0.1 F
C2-
13
T1IN
T1OUT 17
TTL/CMOS
INPUTS
RS-232
OUTPUTS
8
T2IN
T2OUT
12
R5OUT
15
R5IN
8
GND
25
16
15 R1OUT
R1IN
TTL/CMOS
OUTPUTS
RS-232
INPUTS
5k
R2IN
10 R2OUT
9
5k
TO POWER-
MANAGEMENT
UNIT
AUTOSHUTDOWN
PLUS
READY
INVALID 11
1
*MAX3226E/MAX3227E PIN OUT REFERS TO SSOP/TSSOP PACKAGES.
**MAX3224E/MAX3225E PIN OUT REFERS TO DIP/ SSOP/TSSOP PACKAGES.
***MAX3244E/MAX3245E PIN OUT REFERS TO SO/SSOP/TSSOP PACKAGES.
FORCEOFF
FORCEON
20
14
V
CC
GND
18
18 ______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
___________________________________________________________-in Configurations
READY
C1+
V+
FORCEOFF
READY
16 FORCEOFF
1
2
3
4
5
6
7
8
1
2
C2+
C2-
20
19
18
17
16
15
14
C1+
V+
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
15
14
V
C1+
V+
V
CC
CC
GND
GND
3
V-
V
3
CC
C1-
T1OUT
R1IN
C1-
C2+
C2-
V-
13 T1OUT
MAX3226E
MAX3227E
4
R1IN
R2IN
R3IN
R4IN
R5IN
T1OUT
T2OUT
T3OUT
T3IN
T2IN
T1IN
GND
4
MAX3224E
MAX3225E
C2+
C2-
FORCEON
5
C1-
12
5
MAX3244E
MAX3245E
R1OUT
FORCEON
11 T1IN
10 INVALID
6
FORCEON
FORCEOFF
INVALID
R2OUTB
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
6
V-
7
7
T2OUT
9
13 T1IN
R1IN
R1OUT
8
8
R2IN
T2IN
12
9
9
SSOP/TSSOP
R2OUT
INVALID
11
10
10
11
12
13
14
DIP/SSOP/TSSOP
TOP VIEW
15
14
13
12
11
SO/SSOP/TSSOP
T2IN
10
9
GND 16
INVALID
V
17
CC
8
FORCEOFF 18
R2OUT
R2IN
TOP VIEW
MAX3224E
MAX3225E
READY 19
7
36 35 34 33 32 31 30 29 28
EXPOSED PADDLE
20
6
T2OUT
V+
R1IN
R2IN
1
2
3
4
5
6
7
8
9
27 GND
26 C1-
1
2
3
4
5
R3IN
25 FORCEON
24 FORCEOFF
23 INVALID
22 N.C.
R4IN
R5IN
MAX3245E
TQFN
N.C.
T1OUT
T2OUT
T3OUT
21 R2OUTB
TOP VIEW
R1OUT
20
EXPOSED PADDLE
19 R2OUT
12
11
10
9
10 11 12 13 14 15 16 17 18
T1IN
8
7
6
5
13
FORCEOFF
TQFN
READY 14
V+ 15
INVALID
R1OUT
R1IN
MAX3226E
MAX3227E
16
C1+
EXPOSED PADDLE
1
2
3
4
TQFN
______________________________________________________________________________________ 19
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
___________________________________________Ordering Information (continued)
TEMP
PIN
PKG
CODE
—
TEMP
PIN
PKG
CODE
—
PART
PART
RANGE
PKG
RANGE
PKG
21 TSSOP
MAX3227EEAE
±6 SSOP
MAX3225EꢀUP
1 ꢀ to +71 ꢀ
1 ꢀ to +71 ꢀ
-41 ꢀ to +85 ꢀ
-41 ꢀ to +85 ꢀ
21 Thin
QFN-EP*
(5mm x
5mm)
±6 Thin
QFN-EP*
(5mm x
5mm)
MAX3225EꢀTP
T2155-5
MAX3227EETE
MAX3227EEUE
T±655-2
MAX3225EꢀAP
MAX3225EꢀPP
21 SSOP
—
—
1 ꢀ to +71 ꢀ
1 ꢀ to +71 ꢀ
±6
TSSOP
-41 ꢀ to +85 ꢀ
—
—
21 Plastic
DIP
28 Wide
SO
MAX3244EꢀWI
MAX3244EꢀAI
MAX3244EꢀUI
1 ꢀ to +71 ꢀ
1 ꢀ to +71 ꢀ
1 ꢀ to +71 ꢀ
21 Thin
QFN-EP*
(5mm x
5mm)
MAX3225EETP
T2155-5
-41 ꢀ to +85 ꢀ
28 SSOP
28
TSSOP
—
MAX3225EEUP
MAX3225EEAP
21 TSSOP
21 SSOP
—
—
-41 ꢀ to +85 ꢀ
-41 ꢀ to +85 ꢀ
28 Wide
SO
MAX3244EEWI
MAX3244EEAI
MAX3244EEUI
1 ꢀ to +85 ꢀ
1 ꢀ to +85 ꢀ
1 ꢀ to +85 ꢀ
—
—
—
21 Plastic
DIP
MAX3225EEPP
—
-41 ꢀ to +85 ꢀ
28 SSOP
±6 Thin
QFN-EP*
(5mm x
5mm)
28
TSSOP
T±655-2
MAX3226EꢀTE
1 ꢀ to +71 ꢀ
28 Wide
SO
MAX3245EꢀWI
1 ꢀ to +71 ꢀ
—
MAX3226EꢀUE
MAX3226EꢀAE
MAX3226EEAE
±6 TSSOP
±6 SSOP
±6 SSOP
—
—
—
1 ꢀ to +71 ꢀ
1 ꢀ to +71 ꢀ
-41 ꢀ to +85 ꢀ
MAX3245EꢀAI
MAX3245EEAI
MAX3245EꢀTX
1 ꢀ to +71 ꢀ
1 ꢀ to +71 ꢀ
1 ꢀ to +71 ꢀ
28 SSOP
28 SSOP
36 TQFN
—
—
—
±6 Thin
QFN-EP*
(5mm x
5mm)
28 WIDE
SO
MAX3226EETE
-41 ꢀ to +85 ꢀ
T±655-2
MAX3245EEWI
-41 ꢀ to +85 ꢀ
—
28
TSSOP
MAX3226EEUE
±6 TSSOP
±6 SSOP
—
—
MAX3245EEUI
MAX3245EETX
-41 ꢀ to +85 ꢀ
-41 ꢀ to +85 ꢀ
—
—
1 ꢀ to +85 ꢀ
1 ꢀ to +71 ꢀ
MAX3227EꢀAE
36 TQFN
±6 Thin
QFN-EP*
(5mm x
5mm)
MAX3227EꢀTE
MAX3227EꢀUE
-41 ꢀ to +71 ꢀ
-41 ꢀ to +71 ꢀ
T±655-2
—
___________________ Chip Information
MAX3224E TRANSISTOR ꢀOUNT: ±±29
MAX3225E TRANSISTOR ꢀOUNT: ±±29
MAX3226E TRANSISTOR ꢀOUNT: ±±29
MAX3227E TRANSISTOR ꢀOUNT: ±±29
MAX3244E/MAX3245E TRANSISTOR ꢀOUNT: ±335
PROꢀESS: ꢃIꢀMOS
±6
TSSOP
20 ______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
-acꢀage Information
(The package drawing(s) in this data sheet maꢄ not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
D2
D
b
0.10 M
C A B
C
L
D2/2
D/2
k
L
MARKING
AAAAA
E/2
E2/2
C
(NE-1) X
e
L
E2
E
PIN # 1 I.D.
0.35x45°
DETAIL A
e/2
PIN # 1
I.D.
e
(ND-1) X
e
DETAIL B
e
L
C
L
C
L
L1
L
L
e
e
0.10
C
A
0.08
C
C
A3
A1
PACKAGE OUTLINE,
16, 20, 28, 32, 40L THIN QFN, 5x5x0.8mm
1
-DRAWING NOT TO SCALE-
I
21-0140
2
COMMON DIMENSIONS
20L 5x5 28L 5x5
EXPOSED PAD VARIATIONS
D2 E2
MIN. NOM. MAX. MIN. NOM. MAX.
3.00 3.10 3.20 3.00 3.10 3.20
3.00 3.10 3.20 3.00 3.10 3.20
PKG.
SYMBOL MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX.
16L 5x5
32L 5x5
40L 5x5
L
DOWN
BONDS
ALLOWED
YES
NO
exceptions
PKG.
CODES
0.15
A
0.70 0.75 0.80 0.70 0.75 0.80 0.70 0.75 0.80 0.70 0.75 0.80 0.70 0.75 0.80
0.02 0.05 0.02 0.05 0.02 0.05 0.02 0.05 0.02 0.05
0.20 REF. 0.20 REF. 0.20 REF. 0.20 REF. 0.20 REF.
T1655-2
T1655-3
**
**
**
**
A1
0
0
0
0
0
A3
b
T1655N-1 3.00 3.10 3.20 3.00 3.10 3.20
NO
0.25 0.30 0.35 0.25 0.30 0.35 0.20 0.25 0.30 0.20 0.25 0.30 0.15 0.20 0.25
4.90 5.00 5.10 4.90 5.00 5.10 4.90 5.00 5.10 4.90 5.00 5.10 4.90 5.00 5.10
4.90 5.00 5.10 4.90 5.00 5.10 4.90 5.00 5.10 4.90 5.00 5.10 4.90 5.00 5.10
T2055-3
T2055-4
3.00 3.10 3.20 3.00 3.10 3.20
3.00 3.10 3.20 3.00 3.10 3.20
YES
D
E
NO
**
YES
T2055-5
T2855-3
T2855-4
T2855-5
3.15 3.25 3.35 3.15 3.25 3.35 0.40
e
0.80 BSC.
0.25
0.65 BSC.
0.25
0.50 BSC.
0.25
0.50 BSC.
0.25
0.40 BSC.
3.15 3.25 3.35 3.15 3.25 3.35
2.60 2.70 2.80 2.60 2.70 2.80
2.60 2.70 2.80 2.60 2.70 2.80
3.15 3.25 3.35 3.15 3.25 3.35
YES
YES
NO
**
**
**
k
-
-
-
-
-
-
-
-
0.25 0.35 0.45
L
0.30 0.40 0.50 0.45 0.55 0.65 0.45 0.55 0.65 0.30 0.40 0.50 0.40 0.50 0.60
L1
-
-
-
-
-
-
-
-
-
-
-
-
0.30 0.40 0.50
NO
YES
YES
T2855-6
T2855-7
**
**
N
ND
NE
16
4
4
20
5
28
7
32
8
8
40
10
10
2.80
2.60 2.70
2.60 2.70 2.80
5
7
T2855-8
3.15 3.25 3.35 3.15 3.25 3.35 0.40
WHHB
WHHC
WHHD-1
WHHD-2
-----
JEDEC
T2855N-1 3.15 3.25 3.35 3.15 3.25 3.35
NO
YES
NO
YES
NO
**
**
**
**
**
**
3.20
3.00 3.10 .20
T3255-3
T3255-4
T3255-5
3.00 3.10
3.00 3.10 3.20 3.00 3.10 .20
3.20
NOTES:
3.00 3.10
3.00 3.10 3.20
1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
3. N IS THE TOTAL NUMBER OF TERMINALS.
T3255N-1 3.00 3.10 3.20 3.00 3.10 3.20
T4055-1 3.20 3.30 3.40 3.20 3.30 3.40
YES
**SEE COMMON DIMENSIONS TABLE
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL
CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE
OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1
IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE.
5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN
0.25 mm AND 0.30 mm FROM TERMINAL TIP.
6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
9. DRAWING CONFORMS TO JEDEC MO220, EXCEPT EXPOSED PAD DIMENSION FOR
T2855-3 AND T2855-6.
10. WARPAGE SHALL NOT EXCEED 0.10 mm.
11. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY.
12. NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY.
13. LEAD CENTERLINES TO BE AT TRUE POSITION AS DEFINED BY BASIC DIMENSION "e", 0.05.
PACKAGE OUTLINE,
16, 20, 28, 32, 40L THIN QFN, 5x5x0.8mm
2
-DRAWING NOT TO SCALE-
21-0140
I
2
______________________________________________________________________________________ 21
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
-acꢀage Information
(The package drawing(s) in this data sheet maꢄ not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE, TSSOP 4.40mm BODY
1
21-0066
G
1
22 ______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
-acꢀage Information
(The package drawing(s) in this data sheet maꢄ not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
2
1
INCHES
MILLIMETERS
DIM
A
MIN
0.068
MAX
MIN
1.73
0.05
0.25
0.09
MAX
1.99
0.21
0.38
0.20
INCHES
MIN
MAX
MILLIMETERS
MIN
6.07
6.07
7.07
8.07
MAX
6.33
N
0.078
A1
B
D
D
D
D
D
0.239 0.249
0.239 0.249
0.278 0.289
0.317 0.328
14L
0.002 0.008
0.010 0.015
0.004 0.008
6.33 16L
7.33
8.33 24L
20L
C
E
H
D
SEE VARIATIONS
0.205 0.212 5.20
0.0256 BSC
0.397 0.407 10.07 10.33 28L
E
5.38
e
0.65 BSC
H
0.301 0.311 7.65
0.025 0.037 0.63
7.90
0.95
8∞
L
0∞
8∞
0∞
N
A
C
B
L
e
A1
D
NOTES:
1. D&E DO NOT INCLUDE MOLD FLASH.
2. MOLD FLASH OR PROTRUSIONS NOT TO EXCEED .15 MM (.006").
3. CONTROLLING DIMENSION: MILLIMETERS.
4. MEETS JEDEC MO150.
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, SSOP, 5.3 MM
APPROVAL
DOCUMENT CONTROL NO.
REV.
5. LEADS TO BE COPLANAR WITHIN 0.10 MM.
1
21-0056
C
1
INCHES
MILLIMETERS
N
DIM
A
MIN
MAX
0.104
0.012
0.019
0.013
MIN
2.35
0.10
0.35
0.23
MAX
2.65
0.30
0.49
0.32
0.093
0.004
0.014
0.009
A1
B
C
e
0.050
1.27
E
H
E
0.291
0.394
0.016
0.299
0.419
0.050
7.40
10.00
0.40
7.60
10.65
1.27
H
L
VARIATIONS:
INCHES
1
MILLIMETERS
TOP VIEW
DIM
D
MIN
MAX
0.413
0.463
0.512
0.614
0.713
MIN
10.10
11.35
12.60
15.20
17.70
MAX
N MS013
0.398
0.447
0.496
0.598
0.697
10.50 16 AA
11.75 18 AB
13.00 20 AC
15.60 24 AD
18.10 28 AE
D
D
D
D
D
C
A
B
e
0∞-8∞
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .300" SOIC
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0042
B
1
______________________________________________________________________________________ 23
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
-acꢀage Information (continued)
(The package drawing(s) in this data sheet maꢄ not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
24 ______________________________________________________________________________________
±±5ꢀk EꢁDꢂ-rotected, ±µA, ±Mbps 3.0k to 5.5k,
Rꢁꢂ232 Transceivers with Autoꢁhutdown -lus
-acꢀage Information (continued)
(The package drawing(s) in this data sheet maꢄ not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
(NE-1) X
e
E
E/2
k
D/2
C
(ND-1) X
e
D
D2
L
D2/2
e
b
E2/2
L
C
L
k
E2
e
L
C
C
L
L
L1
L
L
e
e
A
A1
A2
PACKAGE OUTLINE
36, 40, 48L THIN QFN, 6x6x0.8mm
1
F
21-0141
2
NOTES:
1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
3. N IS THE TOTAL NUMBER OF TERMINALS.
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1
SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE
ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE.
5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.25 mm AND 0.30 mm
FROM TERMINAL TIP.
6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
9. DRAWING CONFORMS TO JEDEC MO220, EXCEPT FOR 0.4mm LEAD PITCH PACKAGE T4866-1.
10. WARPAGE SHALL NOT EXCEED 0.10 mm.
11. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY.
12. NUMBER OF LEADS SHOWN FOR REFERENCE ONLY.
PACKAGE OUTLINE
36, 40, 48L THIN QFN, 6x6x0.8mm
2
F
21-0141
2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated -roducts, ±20 ꢁan Gabriel Drive, ꢁunnyvale, CA 94086 408ꢂ737ꢂ7600 ____________________ 25
© 2115 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.
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