MAXT3221DW [TI]
LINE TRANSCEIVER, PDSO16;
| 型号： | MAXT3221DW |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | LINE TRANSCEIVER, PDSO16 光电二极管 |
| 文件： | 总11页 (文件大小：144K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAXT3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS351 – JUNE 1999
DB, DW, OR PW PACKAGE
Meet or Exceed the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
Operate With 3-V to 5.5-V V Supply
(TOP VIEW)
CC
EN
C1+
V+
FORCEOFF
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Designed to Operate up to 1 Mbit/s
Low Standby Current . . . 1 µA Typical
External Capacitors . . . 4 × 0.1 µF
V
CC
GND
C1–
C2+
C2–
V–
DOUT
FORCEON
DIN
Accept 5-V Logic Input With 3.3-V Supply
Designed to be Interchangeable With
Maxim MAX3221C and MAX3221E
INVALID
ROUT
RIN
RS-232 Bus-Pin ESD Protection Exceeds
±15-kV Using Human-Body Model (HBM)
Applications
– Battery-Powered Systems, PDAs,
Notebooks, Laptops, Palmtop PCs, and
Hand-Held Equipment
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
description
The MAXT3221 devices consist of one line driver, one line receiver, and a dual charge-pump circuit with ±15-kV
ESD protection pin-to-pin (serial-port connection pins, including GND). These devices provide the electrical
interface between an asynchronous communication controller and the serial-port connector and meet the
requirements of TIA/EIA-232-F. The charge pump and four small external capacitors allow operation from a
single 3-V to 5.5-V supply. These devices are designed to operate at data signaling rates up to 1 Mbit/s, with
an increased slew-rate range of 24 V/ s to 150 V/ s.
Flexible control options for power management are available when the serial port is inactive. The
auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of
operation, if the devices do not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is
set low and EN is high, both drivers and receivers are shut off, and the supply current is reduced to 1 µA.
Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur.
Auto-powerdown can be disabled when FORCEON and FORCEOFF are high. With auto-powerdown enabled,
the devices are activated automatically when a valid signal is applied to any receiver input. The INVALID output
is used to notify the user if an RS-232 signal is present at any receiver input. INVALID is high (valid data) if any
receiver input voltage is greater than 2.7 V or less than –2.7 V or has been between –0.3 V and 0.3 V for less
than 30 µs. INVALID is low (invalid data) if the receiver input voltage is between –0.3 V and 0.3 V for more than
30 µs. Refer to Figure 4 for receiver input levels.
The MAXT3221C is characterized for operation over the temperature range of 0°C to 70°C. The MAXT3221I
is characterized for operation over the temperature range of –40°C to –85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1999, Texas Instruments Incorporated
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAXT3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS351 – JUNE 1999
Function Tables
EACH DRIVER
INPUTS
OUTPUT
VALID RIN
RS-232 LEVEL
DRIVER STATUS
DOUT
DIN
FORCEON
FORCEOFF
X
L
X
H
H
L
L
X
X
Z
H
L
Powered off
H
H
H
H
H
H
Normal operation with
auto-powerdown disabled
H
L
X
Yes
Yes
No
No
H
L
Normal operation with
auto-powerdown enabled
H
L
L
L
Z
Z
Powered off by
auto-powerdown feature
H
L
H = high level, L = low level, X = irrelevant, Z = high impedance
EACH RECEIVER
INPUTS
OUTPUT
ROUT
VALID RIN
RIN
EN
RS-232 LEVEL
L
H
L
L
X
X
H
L
X
H
L
X
Z
H
Open
No
H = high level, L = low level, X = irrelevant,
Z = high impedance (off),
Open = disconnected input or connected driver
off
logic diagram (positive logic)
11
13
10
DIN
DOUT
16
12
FORCEOFF
FORCEON
INVALID
Auto-powerdown
9
8
1
ROUT
RIN
EN
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAXT3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS351 – JUNE 1999
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
CC
Positive output supply voltage, V+ (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 7 V
Negative output supply voltage, V– (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to –7 V
Supply voltage difference, V+ – V– (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 V
Input voltage range, V : Driver (FORCEOFF, FORCEON, EN) . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
I
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25 V to 25 V
Output voltage range, V : Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –13.2 V to 13.2 V
O
Receiver (INVALID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to V
+ 0.3 V
CC
Package thermal impedance, θ (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131°C/W
JA
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149°C/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
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 under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltages are with respect to network GND.
2. The package thermal impedance is calculated in accordance with JESD 51.
recommended operating conditions (see Note 3 and Figure 5)
MIN NOM
MAX
3.6
UNIT
V
V
V
= 3.3 V
= 5 V
3
4.5
2
3.3
5
CC
Supply voltage
5.5
V
CC
V
V
= 3.3 V
= 5 V
CC
Driver and control high-level input voltage, V
V
DIN, FORCEOFF, FORCEON, EN
DIN, FORCEOFF, FORCEON, EN
IH
2.4
CC
Driver and control low-level input voltage, V
IL
0.8
25
70
85
V
V
Receiver input voltage, V
–25
0
I
MAX3221C
MAX3221I
Operating free-air temperature, T
°C
A
–40
NOTE 3: Test conditions are C1–C4 = 0.1 µF at V
CC
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V = 5 V ± 0.5 V.
CC
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 5)
‡
PARAMETER
FORCEOFF, FORCEON, EN
TEST CONDITIONS
MIN TYP
MAX
UNIT
I
I
Input leakage current
±0.01
0.3
1
±1
µA
No load,
Auto-powerdown disabled
Powered off
1
mA
FORCEOFF and FORCEON at V
CC
No load, FORCEOFF at GND
10
I
Supply current
CC
No load, FORCEOFF at V
FORCEON at GND,
,
CC
µA
Auto-powerdown enabled
1
10
All RIN are open or grounded
‡
All typical values are at V
= 3.3 V or V
CC
= 5 V and T = 25°C.
CC
NOTE 3. Test conditions are C1–C4 = 0.1 µF at V
A
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V
= 5 V ± 0.5 V.
CC
CC
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAXT3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS351 – JUNE 1999
DRIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 5)
†
PARAMETER
TEST CONDITIONS
DOUT at R = 3 kΩ to GND, DIN = GND
DIN = V
MIN TYP
MAX
UNIT
V
V
V
High-level output voltage
Low-level output voltage
High-level input current
Low-level input current
5
5.4
–5.4
OH
L
DOUT at R = 3 kΩ to GND,
–5
V
OL
L
CC
I
IH
V = V
I
±0.01
±0.01
±1
±1
µA
µA
CC
I
IL
V at GND
I
V
V
V
= 3.6 V,
V
O
V
O
V
O
V
O
= 0 V
Short-circuit
output current
CC
CC
CC
I
±35
±60
mA
OS
‡
= 5.5 V,
= 0 V
r
Output resistance
, V+, and V– = 0 V,
= ±2 V
= ±12 V,
300
10M
Ω
o
I
off
Output leakage current
FORCEOFF = GND,
= 3.3 V or V = 5 V and T = 25°C.
CC
V
CC
= 0 to 5.5 V
±25
µA
†
‡
All typical values are at V
CC
A
Short-circuit durations should be controlled to prevent exceeding the device absolute power dissipation ratings, and not more than one output
should be shorted at a time.
NOTE 3. Test conditions are C1–C4 = 0.1 µF at V
CC
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V = 5 V ± 0.5 V.
CC
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 5)
†
PARAMETER
TEST CONDITIONS
MIN TYP
MAX
UNIT
kbit/s
ns
C
= 1000 pF,
R
= 3 kΩ
L
L
Maximum data rate
1000
See Figure 1
§
t
Pulse skew
C
= 150 pF to 2500 pF,
R
R
= 3 kΩ to 7 kΩ
= 3 kΩ to 7 kΩ,
25
sk(p)
L
L
L
V
C
= 3.3 V,
CC
SR(tr) Slew rate, transition region (see Figure 1)
24
150
V/µs
= 150 pF to 1000 pF
L
†
§
All typical values are at V
= 3.3 V or V
= 5 V and T = 25°C.
CC A
CC
Pulse skew is defined as |t
– t
|.
PLH PHL
NOTE 3. Test conditions are C1–C4 = 0.1 µF at V
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V = 5 V ± 0.5 V.
CC
CC
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAXT3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS351 – JUNE 1999
RECEIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 5)
†
PARAMETER
High-level output voltage
Low-level output voltage
TEST CONDITIONS
MIN
– 0.6 V
TYP
MAX
UNIT
V
V
V
I
I
= –1 mA
= 1.6 mA
V
CC
V
– 0.1 V
OH
OH
CC
0.4
2.4
2.4
V
OL
OL
V
V
V
V
= 3.3 V
= 5 V
1.6
1.9
1.1
1.4
0.5
CC
CC
CC
CC
V
IT+
Positive-going input threshold voltage
Negative-going input threshold voltage
V
V
= 3.3 V
= 5 V
0.6
0.8
V
V
IT–
Input hysteresis (V
– V
)
IT–
V
hys
IT+
I
Output leakage current
Input resistance
FORCEOFF = 0 V
V = ±3 V to ±25 V
±0.05
±10
µA
kΩ
off
r
3
5
7
i
I
†
All typical values are at V
= 3.3 V or V
= 5 V and T = 25°C.
CC A
CC
NOTE 3. Test conditions are C1–C4 = 0.1 µF at V
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V
= 5 V ± 0.5 V.
CC
CC
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3)
†
PARAMETER
TEST CONDITIONS
MIN TYP
MAX
UNIT
ns
t
t
t
t
t
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
Output enable time
150
150
200
200
50
PLH
PHL
en
C
C
= 150 pF, See Figure 2
L
L
ns
ns
= 150 pF, R = 3 kΩ, See Figure 3
L
Output disable time
ns
dis
‡
Pulse skew
See Figure 2
ns
sk(p)
†
‡
All typical values are at V
= 3.3 V or V
= 5 V and T = 25°C.
CC
Pulse skew is defined as |t
CC
A
– t
|.
PLH PHL
NOTE 3. Test conditions are C1–C4 = 0.1 µF at V
CC
= 3.3 V ± 0.3 V; C1 = 0.047 µF, C2–C4 = 0.33 µF at V
= 5 V ± 0.5 V.
CC
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAXT3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS351 – JUNE 1999
AUTO-POWERDOWN SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 4)
†
TYP
PARAMETER
TEST CONDITIONS
FORCEON = GND,
FORCEOFF = V
MIN
MAX
UNIT
Receiver input threshold
for INVALID high-level output voltage
V
V
V
V
V
2.7
V
T+(VALID)
T–(VALID)
T(INVALID)
OH
CC
FORCEON = GND,
FORCEOFF = V
Receiver input threshold
for INVALID high-level output voltage
–2.7
–0.3
V
V
V
V
CC
FORCEON = GND,
FORCEOFF = V
Receiver input threshold
for INVALID low-level output voltage
0.3
0.4
CC
= –1 mA, FORCEON = GND,
I
OH
FORCEOFF = V
INVALID high-level output voltage
INVALID low-level output voltage
V
– 0.6
CC
CC
= 1.6 mA, FORCEON = GND,
I
OL
FORCEOFF = V
OL
CC
†
All typical values are at V
= 3.3 V or V
= 5 V and T = 25°C.
CC A
CC
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 4)
†
PARAMETER
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
Receiver and driver output enable time
MIN TYP
MAX
UNIT
µs
t
t
t
1
VALID
INVALID
en
30
µs
100
µs
†
All typical values are at V
= 3.3 V or V
= 5 V and T = 25°C.
CC
CC
A
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAXT3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS351 – JUNE 1999
PARAMETER MEASUREMENT INFORMATION
3 V
Input
RS-232
0 V
TLH
Output
Generator
(see Note B)
50 Ω
t
t
THL
C
L
R
L
(see Note A)
V
OH
3 V
–3 V
3 V
–3 V
3 V
Output
FORCEOFF
V
OL
6 V
tTHL or tTLH
SR(tr)
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A.
C includes probe and jig capacitance.
L
B. The pulse generator has the following characteristics: Z = 50 Ω, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
O
r
f
Figure 1. Driver Slew Rate
0 V
EN
3 V
Input
1.5 V
1.5 V
–3 V
Output
Generator
(see Note B)
t
t
PLH
PHL
50 Ω
C
L
(see Note A)
0 V
V
V
OH
FORCEOFF
50%
50%
Output
OL
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A.
C includes probe and jig capacitance.
L
B. The pulse generator has the following characteristics: PRR = 1 Mbit/s, Z = 50 Ω, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
O
r
f
Figure 2. Receiver Propagation Delay Times
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAXT3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS351 – JUNE 1999
PARAMETER MEASUREMENT INFORMATION
3 V
Input
1.5 V
1.5 V
V
CC
3 V or 0 V
–3 V
FORCEON
t
t
PHZ
PZH
(S1 at GND)
(S1 at GND)
R
S1
L
V
3 V or 0 V
OH
50%
Output
0.3 V
GND
C
L
(see Note A)
EN
t
t
PLZ
(S1 at V
PZL
(S1 at V
)
)
CC
CC
Generator
50 Ω
(see Note B)
0.3 V
Output
50%
V
OL
TEST CIRCUIT
VOLTAGE WAVEFORMS
NOTES: A.
C includes probe and jig capacitance.
L
B. The pulse generator has the following characteristics: PRR = 1 Mbit/s, Z = 50 Ω, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
O
r
f
C.
D.
t
t
and t
and t
are the same as t
.
dis
PLZ
PZL
PHZ
PZH
are the same as t
.
en
Figure 3. Receiver Enable and Disable Times
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAXT3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS351 – JUNE 1999
PARAMETER MEASUREMENT INFORMATION
3 V
2.7 V
0 V
0 V
Receiver
Input
–2.7 V
ROUT
–3 V
Generator
(see Note B)
50 Ω
t
t
INVALID
VALID
V
CC
INVALID
Output
0 V
t
Auto-
powerdown
en
INVALID
= 30 pF
≈V+
V+
C
L
(see Note A)
Driver
Output
V
CC
FORCEOFF
FORCEON
0 V
DIN
DOUT
≈V–
V–
TEST CIRCUIT
VOLTAGE WAVEFORMS
Valid RS-232 Level, INVALID High
2.7 V
0.3 V
Indeterminate
If Signal Remains Within This Region
For More Than 30 µs, INVALID Is Low
0 V
†
–0.3 V
Indeterminate
–2.7 V
Valid RS-232 Level, INVALID High
†
Auto-powerdown disables drivers and reduces supply
current to 1 µA.
NOTES: A.
C
L
includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 1 Mbit/s, Z = 50 Ω, 50% duty cycle, t ≤ 10 ns, t ≤ 10 ns.
O
r
f
Figure 4. INVALID Propagation Delay Times and Driver Enabling Time
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MAXT3221
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
SLLS351 – JUNE 1999
APPLICATION INFORMATION
1
2
16
15
FORCEOFF
EN
V
CC
C1+
V+
+
C
= 0.1 µF
BYPASS
3
–
14
Auto-
powerdown
+
–
+
–
GND
C3
C1
4
5
C1–
C2+
13
DOUT
+
–
12
11
10
FORCEON
DIN
C2
6
7
C2–
V–
–
+
C4
INVALID
8
9
RIN
ROUT
V
CC
vs CAPACITOR VALUES
V
CC
C1
C2, C3, and C4
3.3 V ± 0.3 V
5 V ± 0.5 V
3 V to 5.5 V
0.1 µF
0.047 µF
0.1 µF
0.1 µF
0.33 µF
0.47 µF
Figure 5. Typical Operating Circuit and Capacitor Values
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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Copyright 1999, Texas Instruments Incorporated
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