MAX3342EEUE-T [MAXIM]
Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDSO16, 4.40 MM, MO-153AB, TSSOP-16;
| 型号： | MAX3342EEUE-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDSO16, 4.40 MM, MO-153AB, TSSOP-16 信息通信管理 光电二极管 |
| 文件： | 总14页 (文件大小：347K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-2321; Rev 2; 2/03
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
General Description
Features
The MAX3341E/MAX3342E USB transceivers convert
logic-level signals to USB signals, and USB signals to
logic-level signals. An internal 1.5kΩ USB termination
resistor supports full-speed (12Mbps) USB operation.
The MAX3341E/MAX3342E provide built-in 15kꢀ ESꢁ-
protection circuitry on the USB I/O pins, ꢁ+ and ꢁ-,
ꢀ ±±15kV ESVꢀProteoꢁrꢂVꢃꢂVSDVꢄꢂnVSꢅV
ꢀ CrmplyVwꢁohVUEBVEoꢄꢂnꢄPnV±.±V(FullVEpttnV2.0)
ꢀ UEBVE5twVIꢂntptꢂntꢂoVrfVIꢂpuoVE5tw
ꢀ EtpꢄPꢄotVkꢀVꢄꢂnVkMVIꢂpuos/ꢃuopuos
ꢀ k SrwꢂVorV±.8kVAllrwsVCrꢂꢂteoꢁrꢂVwꢁohVLrwꢅ
L
krloꢄgtVAEICs
and ꢀ
.
CC
ꢀ RttꢂumtPꢄotVwꢁohVꢀrwtPVApplꢁtn
ꢀ UEBVStoteoVFuꢂeoꢁrꢂ
The MAX3341E/MAX3342E operate with logic supply
voltages as low as 1.8ꢀ, ensuring compatibility with
low-voltage ASICs. The suspend mode lowers supply
current to less than 50µA. A unique enumerate feature
allows changes in USB communication protocol while
power is applied. The MAX3341E/MAX3342E are fully
compliant with USB specification 1.1, and full-speed
operation under USB specification 2.0.
3.7kV(mꢁꢂ)VorV4kV(mꢄx)—MAX334±
±kV(mꢁꢂ)VorV2.8kV(mꢄx)—MAX3342
ꢀ AllrwVEꢁꢂgltꢅ ꢂntnVrPVSꢁfftPtꢂoꢁꢄlVLrgꢁeVI/ꢃV
ꢀ IꢂotPꢂꢄlVLꢁꢂtꢄPVRtgulꢄorPVAllrwsVSꢁPteoVꢀrwtPꢁꢂg
fPrmVohtVUEBV
ꢀ IꢂotPꢂꢄlVTtPmꢁꢂꢄoꢁrꢂVRtsꢁsorPVfrPVFullꢅEpttn
ꢃptPꢄoꢁrꢂ
ꢀ ThPttꢅEoꢄotVꢃuopuos
The MAX3341E/MAX3342E have a USB detect that mon-
itors the USB bus for insertion and signals this event. The
MAX3341E USB_ꢁET threshold is between 3.7ꢀ (min)
and 4ꢀ (max), while the MAX3342E USB_ꢁET threshold
is between 1ꢀ (min) and 2.8ꢀ (max).
ꢀ NrVꢀrwtPꢅEupplyVEtqutꢂeꢁꢂgVRtquꢁPtnV
ꢀ SPꢁvtPVAeoꢁvtVꢁꢂVEusptꢂnVMrnt
ꢀ AvꢄꢁlꢄbltVꢁꢂVMꢁꢂꢁꢄouPtVChꢁpꢅEeꢄltVꢀꢄe5ꢄgt
The MAX3341E/MAX3342E are available in the miniature
4 ✕ 4 UCSP™, as well as the small 16-pin TSSOP, and
are specified over the extended temperature range,
-40°C to +85°C.
Applications
Ordering Information
Cell Phones
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TSSOP
PC Peripherals
Information Appliances
ꢁata Cradles
PꢁAs
MAX3341EEUE
MAX3341EEBE-T
MAX3342EEUE
MAX3342EEBE-T
4 x 4 UCSP
16 TSSOP
4 x 4 UCSP
MP3 Players
ꢁigital Cameras
UCSP is a trademark of Maxim Integrated Products, Inc.
Pin Configurations appear at end of data sheet.
Typical Operating Circuit
1µF
V
BUS
D+
SYSTEM
V
CC
D+
V
RCV
VPI
VMI
SUSPEND
OE
L
23.7Ω
23.7Ω
SUPPLY
MAX3341E/
MAX3342E
0.1µF
VOLTAGE
D-
D-
GND
VTRM
SYSTEM INTERFACE
USB_DET
1µF
USB
INTERFACE
CONNECTOR
MODE
ENUMERATE
VPO
VMO
GND
________________________________________________________________ Maxim Integrated Products
±
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.
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
ABSOLUTE MAXIMUM RATINGS
(All voltages refer to GND, unless otherwise noted.)
Maximum Continuous Current (all other pins).................. 15mA
Supply Voltage (V ) ...............................................-0.3V to +6V
Output of Internal Regulator (VTRM) (Note 1)..........-0.3V to +6V
Input Voltage (D+, D-) (Notes 1, 2) ..........................-0.3V to +6V
Continuous Power Dissipation (T = +70°C)
CC
A
16-Pin TSSOP (derate 7.1mW/°C above +70°C) .........571mW
4 ✕ 4 UCSP (derate 8.2 mW/°C above +70°C)............659mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Bump Temperature (soldering) Reflow............................+235°C
System Supply Voltage (V ).....................................-0.3V to +6V
L
RCV, SUSP, VMO, MODE, VPO, OE, VMI,
VPI, USB_DET, ENUM...............................-0.3V to (V + 0.3V)
L
Short-Circuit Current (D+, D-) to V
or
CC
Ground (Note 3) .....................................................Continuous
Note 1: Guaranteed for V < +3.7V only.
CC
Note 2: Absolute Maximum Rating for input voltage (D+, D-) with V
Note 3: External 23.7Ω resistors connected to D+ and D-.
> +3.7V is -0.3V to (V
+0.3V).
CC
CC
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
= 4V to 5.5V bypassed with 1µF to GND, GND = 0, V = 1.8V to 3.6V, D+ to GND = 15kΩ, D- to GND = 15kΩ, ENUM = V ,
CC
= T
L
L
T
to T
, unless otherwise noted. Typical values are at V
= 5V, V = 2.5V, T = +25°C.) (Note 4)
CC L A
A
MIN
MAX
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.5
20
UNITS
V
USB Supply Voltage
USB Supply Current
V
4
CC
CC
I
Data rate = 12Mbps, C = 50pF (Figure 6b)
L
10
mA
SUSP = high, ENUM = low, OE = high
SUSP = high, OE = low
50
USB SUSP Supply Current
I
85
µA
CC(SUSP)
SUSP = high, ENUM = high, OE = high
85
V
Supply Current
I
(<3V)
V
V
V
V
< 3V (MAX3341E)
80
µA
µA
µA
µA
µA
CC
CC
CC
CC
CC
CC
D+/D- Leakage Current
Supply Current
I
(3V)
= 3V; D+, D- < 3.6V (MAX3341E)
< 1V (MAX3342E)
10
D+/D-
V
I
(<1V)
CC
80
CC
D+/D- Leakage Current
I
(1V)
= 1V; D+, D- < 3.6V (MAX3342E)
10
D+/D-
V Suspend Supply Current
L
I
SUSP = high, 0 < V
< 5.5V
CC
20
L(SUSP)
LOGIC-SIDE I/O
V Input Range
L
V
1.8
3.6
0.4
V
V
L
Input High Voltage
V
SUSP, MODE, ENUM, OE, VMO, VPO
SUSP, MODE, ENUM, OE, VMO, VPO
2/3 x V
IH
L
Input Low Voltage
V
V
IL
Output Voltage High
Output Voltage Low
Input Leakage Current
USB-SIDE I/O
V
VPI, VMI, RCV, USB_DET; I
VPI, VMI, RCV, USB_DET; I
= 1mA
SOURCE
V - 0.2
L
V
OH
V
= -1mA
SINK
0.4
10
V
OL
SUSP, MODE, ENUM, OE, VMO, VPO = 0 or V
1
µA
L
Output Voltage Low
Output Voltage High
Input Impedance
V
D+ or D-
0.3
3.6
V
V
OL
V
D+ or D-
2.8
1
OH
Z
Three-state driver
MΩ
V
IN
IH
Single-Ended Input Voltage High
Single-Ended Input Voltage Low
V
2.0
V
0.8
V
IL
Receiver Single-Ended
Hysteresis
V
200
mV
mV
HYS
DIFF
Differential Input Sensitivity
V
200
2
_______________________________________________________________________________________
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
ELECTRICAL CHARACTERISTICS (continued)
(V
= 4V to 5.5V bypassed with 1µF to GND, GND = 0, V = 1.8V to 3.6V, D+ to GND = 15kΩ, D- to GND = 15kΩ, ENUM = V ,
CC
= T
L
L
T
to T
, unless otherwise noted. Typical values are at V
= 5V, V = 2.5V, T = +25°C.) (Note 4)
CC L A
A
MIN
MAX
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Common-Mode Voltage
Range
V
0.8
2.5
V
CM
Driver Output Impedance
Internal Resistor
Z
Including 23.7Ω ( 1ꢀ) external resistors
28.5
1.425
3.0
43.5
1.575
3.6
Ω
kΩ
V
OUT
R
1.500
3.3
PU
Termination Voltage
VTRM
V
V
V
V
MAX3341E
MAX3341E
MAX3342E
MAX3342E
4.0
USBLH1
USBHL1
USBLH2
USBHL2
USBHYS
3.7
1
USB_DET Threshold
V
2.8
USB_DET Hysteresis
V
25
30
mV
LINEAR REGULATOR
Power-Supply Rejection Ratio
External Capacitor
PSRR
f = 10kHz, C
= 1µF, D+/D- load
dB
µF
OUT
C
Compensation of linear regulator
1
OUT
ESD PROTECTION (V , D+, D-)
CC
Human Body Model
15
15
8
kV
kV
kV
IEC1000-4-2 Air-Gap Discharge
IEC1000-4-2 Contact Discharge
TIMING CHARACTERISTICS
(V
= 4V to 5.5V, GND = 0, V = 1.8V to 3.6V, D+ to GND = 15kΩ, D- to GND = 15kΩ, ENUM = V , T = T
to T
, unless
MAX
CC
L
L
A
MIN
otherwise noted. Typical values are at V
= 5V, V = 2.5V, T = +25°C.) (Figures 2–6) (Note 4)
CC
L
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OE to Transmit DelayEnable Time
t
Figure 6c
Figure 6c
Figure 6b
15
80
ns
PZD
OE to Driver Three-State Delay
Driver Disable Time
t
25
ns
µs
PDZ
USB Detect Signal Delay
t
7.5
DUSB
TRANSMITTER
t
t
t
t
MODE = high, Figure 6c
MODE = high, Figure 6c
MODE = low, Figure 6c
MODE = low, Figure 6c
30
30
35
35
20
20
110
2
PLH1(drv)
PHL1(drv)
PLH0(drv)
PHL0(drv)
VPO/VMO to D+/D- Propagation
Delay
ns
ns
VPO to D+/D- Propagation
Delay
Rise Time D+/D-
t
4
4
ns
ns
ꢀ
V
R
Fall Time D+/D-
t
F
Rise- and Fall-Time Matching
Output Signal Crossover
t /t
R F
(Note 5)
(Note 5)
90
1.3
V
CRS
DIFFERENTIAL RECEIVER (Figure 6a)
t
30
30
15
15
PLH(RCV)
PHL(RCV)
D+/D- to RCV Propagation
Delay
ns
t
Rise Time RCV
Fall Time RCV
t
ns
ns
R
t
F
_______________________________________________________________________________________
3
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
TIMING CHARACTERISTICS (continued)
(V
= 4V to 5.5V, GND = 0, V = 1.8V to 3.6V, D+ to GND = 15kΩ, D- to GND = 15kΩ, ENUM = V , T = T
to T
, unless
MAX
CC
L
L
A
MIN
otherwise noted. Typical values are at V
= 5V, V = 2.5V, T = +25°C.) (Figures 2–6)
CC
L
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SINGLE-ENDED RECEIVERS
t
t
Figure 6a
Figure 6a
15
15
15
15
PLH(SE)
PHL(SE)
D+/D- to VPI or VMI Propagation
Delay
ns
Rise Time VPI and VMI
Fall Time VPI and VMI
t
Measured from 10ꢀ to 90ꢀ, Figure 6a
Measured from 90ꢀ to 10ꢀ, Figure 6a
ns
ns
R(SE)
t
F(SE)
Time to Detect Single-Ended
Zero
t
14
140
ns
SE0
Note 4: Parameters are 100ꢀ production tested at 25°C, limits over temperature are guaranteed by correlation.
Note 5: Guaranteed by design, not production tested.
Typical Operating Characteristics
(V
= 5V, V = 3.3V, T = +25°C, unless otherwise noted.)
A
L
CC
DIFFERENTIAL RECEIVER PROPAGATION
DELAY vs. V
DIFFERENTIAL RECEIVER PROPAGATION
DELAY vs. V
SINGLE-ENDED RECEIVER PROPAGATION
DELAY vs. V
CC
L
L
20
20
18
16
14
12
10
8
10
9
T
= +85°C
A
T
= +85°C
T
= +85°C
A
A
17
14
11
8
8
T
= +25°C
= -40°C
A
T
= +25°C
A
T
= +25°C
A
7
6
T
= -40°C
A
5
T
A
T
= -40°C
A
4
1.8
2.3
2.8
3.3
4.00 4.25 4.50 4.75 5.00 5.25 5.50
(V)
1.8
2.3
2.8
3.3
V (V)
L
V
V (V)
L
CC
SINGLE-ENDED RECEIVER PROPAGATION
DELAY vs. V
TIME TO ENTER SUSPEND MODE
CC
TRANSMITTER SKEW vs. V
vs. V
CC
CC
10
9
50
45
40
35
30
25
20
15
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
T
= +85°C
A
T
= +85°C
A
T
= -40°C
A
8
T
= +25°C
= -40°C
A
T
= +25°C
A
T
= +25°C
A
7
6
T
A
T
= +85°C
A
T
= -40°C
A
5
4
4.00 4.25 4.50 4.75 5.00 5.25 5.50
(V)
4.00 4.25 4.50 4.75 5.00 5.25 5.50
(V)
4.00 4.25 4.50 4.75 5.00 5.25 5.50
(V)
V
V
V
CC
CC
CC
4
_______________________________________________________________________________________
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
Typical Operating Characteristics (continued)
(V
= 5V, V = 3.3V, T = +25°C, unless otherwise noted.)
A
L
CC
LOGIC CURRENT CONSUMPTION IN
SUSPEND MODE
CURRENT CONSUMPTION IN
SUSPEND MODE
VTRM vs. V
CC
9
8
7
6
5
25.5
25.0
24.5
24.0
23.5
23.0
22.5
22.0
3.5
3.4
3.3
3.2
3.1
3.0
I
= 15mA
VTRM
4
3
1.8
2.3
2.8
3.3
4.00 4.25 4.50 4.75 5.00 5.25 5.50
4.00 4.25 4.50 4.75 5.00 5.25 5.50
(V)
V (V)
L
V
(V)
CC
V
CC
TRANSMISSION IN SUSPEND MODE
(SUSP = 1)
RISE- AND FALL-TIME MATCHING
SUSPEND RESPONSE
MAX3341 toc12
MAX3341 toc10
MAX3341 toc11
f = 6MHz
VPO
D+
SUSP
0
VMO
1V/div
D-
2V/div
D+
2V/div
0
2µs/div
20ns/div
100ns/div
USB_DET RESPONSE
MAX3341 toc13
V
CC
2V/div
0
USB_DET
0
10µs/div
_______________________________________________________________________________________
5
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
-in Description
PIN
NAME
FUNCTION
TSSOP
UCSP
D2
Receiver Output. Single-ended CMOS output. RCV responds to the differential input on D+
and D-.
1
2
RCV
VPO
D1
ASIC Voltage Positive Output. Logic-level data into the MAX3341E/MAX3342E.
Mode-Control Input. Selects differential (mode 1) or single-ended (mode 0) input for the
system side when converting logic-level signals to USB level signals. Force MODE high to
select mode 1. Force MODE low to select mode 0.
3
C2
MODE
4
5
C1
B1
VMO
ASIC Voltage Minus Output. Logic-level data into the MAX3341E/MAX3342E.
Output Enable. Drive OE low to enable data transmission on D+ and D-. Drive OE high to
disable data transmission or to receive data.
OE
Suspend Input. Drive SUSP low for normal operation. Drive SUSP high for low-power state. In
low-power state, RCV is low and VPI/VMI are active.
6
B2
SUSP
7
8
A1
A2
VPI
ASIC Voltage Positive Input. Logic-level data output from the MAX3341E/MAX3342E.
ASIC Voltage Minus Input. Logic-level data output from the MAX3341E/MAX3342E.
VMI
Enumerate. Drive ENUM high to connect the internal 1.5kΩ resistor from D+ to 3.3V. Drive
ENUM low to disconnect the internal 1.5kΩ resistor.
9
B3
ENUM
USB-Side Power-Supply Input. Connect V
to GND with a 1µF ceramic capacitor.
to the incoming USB power supply. Bypass V
CC
CC
10
11
12
A3
A4
B4
V
CC
GND
D-
Ground
Negative USB Differential Data Input/Output. Connect to the USB’s D- signal through a 23.7Ω
1ꢀ resistor.
Positive USB Differential Data Input/Output. Connect to the USB’s D+ signal through a 23.7Ω
1ꢀ resistor.
13
14
15
C4
D4
D3
D+
Regulated Output Voltage. 3.3V output derived from the V
input. Bypass VTRM to GND
CC
VTRM
with a 1µF (min) low-ESR capacitor such as ceramic or plastic film types.
System-Side Power-Supply Input. Connect to the system’s logic-level power supply, 1.8V to
3.6V.
V
L
USB Detector Output. A high at USB_DET signals to the ASIC that V is present. A low at
CC
16
C3
USB_DET
USB_DET indicates that V
is not present. 3.7V (min) and 4V (max), while the MAX3342E
CC
USB_DET threshold is between 1V (min) and 2.8V (max).
The MAX3341E/MAX3342E are tolerant to power
Detailed Description
sequencing with either V
> V or V > V
.
CC
CC
L
L
CC
The MAX3341E/MAX3342E are bidirectional level trans-
ceivers that convert single-ended or differential logic-
level signals to differential USB signals, and convert
differential USB signals to single-ended or differential
logic-level signals. The MAX3341E/MAX3342E are
Additionally, the USB I/O, D+ and D-, and V
are ESD
protected to 15kV. The MAX3341E/MAX3342E can
receive USB power (V ) directly from the USB con-
CC
nection and operate with logic supplies (V ) down to
L
1.8V, while still meeting the USB physical layer specifi-
cations. The MAX3341E/MAX3342E supports full-speed
(12Mbps) USB specification 2.0 operation.
operational from V
= 5.5V to V
= 3V (electrical
CC
CC
specifications are not guaranteed for V
< 4V). Both
CC
devices include an internal 1.5kΩ pullup resistor that
connects and disconnects D+ to VTRM (see the
Functional Diagram).
The MAX3341E/MAX3342E have a unique enumerate
feature that functions when power is applied. Driving
6
_______________________________________________________________________________________
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
ENUM low disconnects the internal 1.5kΩ termination
resistor from D+ enumerating the USB. This is useful if
changes in communication protocol are required while
power is applied, and while the USB cable is connected.
VTRM
VTRM is the 3.3V output of the internal linear voltage
regulator. VTRM powers the internal circuitry of the USB
side of the MAX3341E/MAX3342E. Connect a 1µF (min)
low-ESR ceramic or plastic capacitor from VTRM to
GND, as close to VTRM as possible.
Device Control
D+ and D-
D+ and D- are the USB side transmitter I/O connec-
tions, and are ESD protected to 15kV using the
Human Body Model, 15kV using IEC 1000-4-2 Air-
Gap Discharge, and 8kV using IEC 1000-4-2 Contact
Discharge, making the MAX3341E/MAX3342E ideal for
applications where a robust transmitter is required. A
23.7Ω resistor is required on D+ and D- for normal
operation (see the External Resistors section).
V
CC
In most applications, V
is derived from the USB 5V out-
CC
put. If supplying V
with an alternative power supply
CC
such as a lithium-ion battery, the V
input range is 4.0V
CC
to 5.5V. If V
drops below 4.0V, supply current drops
CC
to 10µA avoiding excessive battery drain, and D+/D-
enter a high-impedance state allowing other devices to
drive the lines. Bypass V
capacitor as close to the device as possible.
to GND with a 1µF ceramic
CC
The MAX3341E/MAX3342E contain unique circuitry to
ensure the USB skew is independent of the input skew
on VPO and VMO. Input skews of up to 10ns are
ignored and do not show up on the output.
USB Detect
USB detect output (USB_DET) signals to the ASIC that
V
is present. A high at USB_DET indicates that V
is
is
CC
CC
CC
present, while a low at USB_DET indicates that V
ENUM
USB specification 2.0 requires a 1.5kΩ pullup resistor
on D+ for full-speed (12Mbps) operation. Controlled by
enumerate (ENUM), the MAX3341E/MAX3342E provide
this internal 1.5kΩ resistor. Drive ENUM high to connect
the pullup resistor from D+ to VTRM. Drive ENUM low to
disconnect the pullup resistor from D+ to VTRM.
not present. The MAX3341E USB_DET threshold is
between 3.7V (min) and 4V (max), while the MAX3342E
USB_DET threshold is between 1V (min) and 2.8V (max).
SUSP
Suspend (SUSP) is a control input. Force SUSP high to
place the MAX3341E/MAX3342E in a low-power state.
In this state, the quiescent supply current into V
less than 50µA and RCV goes low.
is
CC
VPO/VMO, VPI/VMI, and OE
The MAX3341E/MAX3342E system-side inputs are VPO
and VMO. Data from an ASIC comes into the
MAX3341E/MAX3342E through VPO and VMO. VPO
and VMO operate either differentially with VPO as the
positive terminal and VMO as the negative terminal, or
single ended with VPO as the data input (see the
MODE section).
In suspend mode, VPI and VMI remain active as
receive outputs and VTRM stays on. The MAX3341E/
MAX3342E continue to receive data from the USB,
allowing the µP to sense activity on the D+/D- lines and
wake up the MAX3341E/MAX3342E.
The MAX3341E/MAX3342E can also transmit data to
D+ and D- while in suspend mode. This function is
used to signal a remote wakeup by driving a signal on
D+ and D- for a period of 1ms to 15ms. Slew rate con-
trol is not active during suspend mode, and data can
only be sent at data rates up to 200kps.
The MAX3341E/MAX3342E system-side outputs are
VPI, VMI, and RCV. The MAX3341E/MAX3342E send
data to an ASIC through VPI, VMI, and RCV. VPI and
VMI are outputs to the single-ended receivers and RCV
is the output of the differential receiver.
Output enable (OE) controls data transmission. Drive OE
low to enable data transmission on D+ and D-. Drive OE
high to disable data transmission or receive data.
Data Transfer
Receiving Data from the USB
Data received from the USB are output to VPI/VMI in
either of two ways, differentially or single ended. To
receive data from the USB, force OE high and SUSP
low. Differential data arriving at D+/D- appear as differ-
ential logic signals at VPI/VMI, and as a single-ended
logic signal at RCV. If both D+ and D- are low, then VPI
and VMI are low, signaling a single-ended zero condi-
tion on the bus; RCV is undefined (Table 1).
MODE
MODE is a control input that selects whether differential
or single-ended logic signals are recognized by the
system side of the MAX3341E/MAX3342E. Drive MODE
high to select differential mode with VPO as the positive
terminal and VMO as the negative terminal. Drive
MODE low to select single-ended mode with VPO as
the data input (Table 1).
_______________________________________________________________________________________
7
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
Table 1a. Truth Table Transmit (SUSP = 0, OE = 0, ENUM = X)
INPUT
OUTPUT
MODE
VPO
VMO
D+
0
D-
1
0
0
0
0
1
0
1
RCV
0
VPI
0
VMI
1
RESULT
LOGIC 0
SE0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
X
0
0
1
1
1
0
LOGIC 1
SE0
0
X
0
0
0
X
0
0
SE0
0
0
0
1
LOGIC 0
LOGIC 1
UNDEFINED
1
1
1
0
1
X
1
1
Table 1b. Truth Table Receive (SUSP = 0, OE = 1, ENUM = X)
INPUT
OUTPUT
VPI
0
VMI
0
D+
0
D-
0
RCV
RESULT
SE0
X
0
1
X
0
1
0
1
LOGIC 0
LOGIC 1
UNDEFINED
1
0
1
0
1
1
1
1
Table 1c. Truth Table Transmit in Suspend* (SUSP = 1, OE = 0, ENUM = X)
INPUT
OUTPUT
MODE
VPO
VMO
D+
0
D-
1
0
0
0
0
1
0
1
RCV
VPI
0
VMI
1
RESULT
LOGIC 0
SE0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
0
0
0
0
1
1
0
LOGIC 1
SE0
0
0
0
0
0
0
SE0
0
0
1
LOGIC 0
LOGIC 1
UNDEFINED
1
1
0
1
1
1
*Timing specifications are not guaranteed for D+ and D-.
Table 1d. Truth Table Receive in Suspend* (SUSP = 1, OE = 1, MODE = X, VPO/VMO = X,
ENUM = X)
INPUT
OUTPUT
VPI
0
VMI
0
D+
0
D-
0
RCV
RESULT
0
0
0
0
VPI/VMI ACTIVE
VPI/VMI ACTIVE
VPI/VMI ACTIVE
VPI/VMI ACTIVE
0
1
0
1
1
0
1
0
1
1
1
1
*Timing specifications are not guaranteed for D+ and D-.
_______________________________________________________________________________________
8
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
Transmitting Data to the USB
R
R
D
C
The MAX3341E/MAX3342E output data to the USB dif-
ferentially on D+ and D-. The logic driving signals can
be either differential or single ended. For sending dif-
ferential logic, force MODE high, force OE and SUSP
low, and apply data to VPO and VMO. D+ then follows
VPO, and D- follows VMO. To send single-ended logic
signals, force MODE, SUSP, and OE low, and apply
data to VPO/VMO. When VMO is high, a single-ended
zero condition is sent on the bus and RCV is undefined
(Table 1).
1500Ω
1MΩ
DISCHARGE
RESISTANCE
CHARGE-CURRENT-
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
C
STORAGE
CAPACITOR
s
100pF
SOURCE
EꢁD -rotection
To protect the MAX3341E/MAX3342E against ESD, D+
and D- have extra protection against static electricity to
protect the device up to 15kV. The ESD structures
Figure 1a. Human Body ESD Test Models
withstand high ESD in all states normal operation,
—
suspend, and powered down. In order for the 15kV
ESD structures to work correctly, a 1µF or greater
capacitor must be connected from VTRM to GND.
I
P
100%
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I
r
ESD protection can be tested in various ways; the D+
and D- input/output pins are characterized for protection
to the following limits:
AMPERES
36.8%
1) 15kV using the Human Body Model
10%
0
2) 8kV using the IEC 1000-4-2 Contact Discharge
Method
TIME
0
t
RL
t
DL
CURRENT WAVEFORM
3) 15kV using the IEC 1000-4-2 Air-Gap Method
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
Figure 1b. Human Body Model Current Waveform
R
R
D
330Ω
C
50MΩ TO 100MΩ
Human Body Model
Figure 1a shows the Human Body Model, and Figure 1b
shows the current waveform it generates when dis-
charged into a low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the test device through a
1.5kΩ resistor.
DISCHARGE
RESISTANCE
CHARGE-CURRENT-
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
C
s
150pF
STORAGE
CAPACITOR
SOURCE
IEC 1000-4-2
The IEC 1000-4-2 standard covers ESD testing and per-
formance of finished equipment; it does not specifically
refer to integrated circuits. The MAX3341E/MAX3342E
help the user design equipment that meets level 4 of IEC
1000-4-2, without the need for additional ESD-protection
components.
Figure 1c. IEC 1000-4-2 ESD Test Model
lower in the IEC 1000-4-2 model. Hence, the ESD with-
stand voltage measured to IEC 1000-4-2 is generally
lower than that measured using the Human Body Model.
Figure 1c shows the IEC 1000-4-2 model.
The major difference between tests done using the
Human Body Model and IEC 1000-4-2 is a higher peak
current in IEC 1000-4-2, because series resistance is
_______________________________________________________________________________________
9
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
The Air-Gap Discharge Method involves approaching
V
L
the device with a charged probe. The Contact
Discharge Method connects the probe to the device
before the probe is energized.
OE
0
V /2
L
Machine Model
The Machine Model for ESD tests all pins using a 200pF
storage capacitor and zero discharge resistance. Its
objective is to emulate the stress caused by contact that
occurs with handling and assembly during manufactur-
ing. All pins require this protection during manufactur-
ing. Therefore, after PC board assembly, the Machine
Model is less relevant to I/O ports.
t
t
PDZ
PZD
V
V
- 0.3V
+ 0.3V
OHD
D+/D-
OLD
Figure 2. Enable and Disable Timing, Transmitter
Applications Information
External Components
External Resistors
Two external 23.7Ω 1ꢀ, 1/2W resistors are required
for USB connection. Place the resistors in between the
MAX3341E/MAX3342E and the USB connector on the
D+ and D- lines. See Typical Operating Circuit.
V
L
VPO
0
V /2
L
t
PHLO
External Capacitors
Use three external capacitors for proper operation. Use
2V
D+/D-
0.8V
a 0.1µF ceramic for decoupling V , a 1µF ceramic for
L
decoupling V , and a 1.0µF (min) ceramic or plastic
CC
filter capacitor on VTRM. Return all capacitors to GND.
UCꢁ- Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, printed circuit board
techniques, bump-pad layout, and recommended reflow
temperature profile, as well as the latest information on
reliability testing results, refer to the Application Note
UCSP—A Wafer-Level Chip-Scale Package available on
Maxim’s website at www.maxim-ic.com/ucsp.
Figure 3. Mode 0 Timing
V
L
VPO/VMO
0
V /2
L
t
t
PHL1
PLH1
2V
D+/D-
0.8V
Figure 4. Mode 1 Timing
10 ______________________________________________________________________________________
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
3V
D+
D-
0V
t
t
t
PHL(RCV)
PLH(RCV)
V
L
RCV
V /2
L
0V
t
t
PHL(SE)
PLH(SE)
VPI
V
L
V /2
L
0V
t
PLH(SE)
PHL(SE)
VMI
V
L
V /2
L
0V
D+/D- RISE/FALL TIMES ≤ 8ns, V = 1.8V, 2.5V, 3.3V
L
Figure 5. D+/D- to RCV, VPI, VMI Propagation Delays
TEST POINT
3.3V
23.7Ω
D+
TEST POINT
25pF
MAX3341E
MAX3342E
VMI OR VPI OR RCV
1.5kΩ
C = 50pF
L
15kΩ
MAX3341E
MAX3342E
TEST POINT
(a) LOAD FOR VPI, VMI, AND RCV
MAX3341E
23.7Ω
D-
C = 50pF
L
15kΩ
TEST POINT
24Ω
200Ω
MAX3342E
USB_DET
D+ OR D-
+
-
GND
OR V
25pF
50pF
CC
(b) LOAD FOR D+, D-, AND USB_DET
(c) LOAD FOR ENABLE AND DISABLE TIME, D+/D-
Figure 6. Test Circuits
______________________________________________________________________________________ 11
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
Functional Diagram
USB SUPPLY
V
CC
USB_DET
Vbg
LINEAR
REGULATOR
OE
BANDGAP
V
L
ENUM
VTRM
TO INTERNAL CIRCUITS
MAX3341E
MAX3342E
RCV
GND
RECEIVER
1.5kΩ
SUSP
23.7Ω
23.7Ω
TRANSMITTER
D-
VMO
MODE
VPO
D+
OE
EXTERNAL RESISTORS
USB_DET
TO INTERNAL CIRCUITS
VMI
VPI
Vbg
SINGLE-ENDED RECEIVERS
-in Configurations
1
2
3
4
TOP VIEW
BOTTOM VIEW
RCV
1
2
3
4
5
6
7
8
16 USB_DET
MAX3341E/MAX3342E
VPO
MODE
VMO
OE
15
14
13
12
11
10
9
V
L
D
VPO
RCV
V
VTRM
L
VTRM
D+
C
B
VMO MODE USB_DET D+
MAX3341E
MAX3342E
D-
OE
SUSP ENUM
D-
SUSP
VPI
GND
A
V
CC
VPI
VMI
V
GND
CC
VMI
ENUM
UCSP
TSSOP
Chip Information
TRANSISTOR COUNT: 2162
PROCESS: BiCMOS
12 ______________________________________________________________________________________
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
-ac5age Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
______________________________________________________________________________________ 13
1ꢀ5k EꢁDꢂ-rotected UꢁB Level Transceivers
in UCꢁ- with UꢁB Detect
-ac5age Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
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.
14 ____________________Maxim Integrated -roducts, 120 ꢁan Gabriel Drive, ꢁunnyvale, CA 94086 408ꢂ737ꢂ7600
© 2003 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
相关型号：
MAX3344EEUE+
Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDSO16, 4.40 MM, MO-153AB, TSSOP-16
MAXIM
MAX3344EEUE+T
Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDSO16, 4.40 MM, MO-153AB, TSSOP-16
MAXIM
MAX3344EEUE-T
Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDSO16, 4.40 MM, MO-153AB, TSSOP-16
MAXIM
©2020 ICPDF网 联系我们和版权申明