Texas Instruments SN75LVDS31D, SN75LVDS31DR Datasheet
D
Meets or Exceeds the Requirements of
ANSI TIA/EIA-644 Standard
D
Low-Voltage Differential Signaling With
Typical Output Voltage of 350 mV and a
100-Ω Load
D
Signaling Rates up to 155 Mbps
D
Operates From a Single 3.3-V Supply
D
Driver at High Impedance When Disabled or
With VCC = 0
D
Low-Voltage TTL (LVTTL) Logic Input
Levels
D
Characterized For Operation From
0°C to 70°C
description
The SN75LVDS31 and SN75LVDS9638 are
differential line drivers that implement the
electrical characteristics of low-voltage differential
signaling (L VDS). This signaling technique lowers
the output voltage levels of 5 V differential
SN75LVDS31, SN75LVDS9638
HIGH-SPEED DIFFERENTIAL LINE DRIVERS
SLLS359A – JUNE 1999 – REVISED MARCH 2000
SN75LVDS31D (Marked as 75LVDS31)
SN75LVDS9638D (Marked as DF638 or 7L9638)
GND
V
CC
1A
2A
GND
(TOP VIEW)
1A
1Y
1Z
G
2Z
2Y
2A
(TOP VIEW)
16
15
14
13
12
11
10
V
CC
4A
4Y
4Z
G
3Z
3Y
9
3A
1Y
8
1Z
7
2Y
6
5
2Z
1
2
3
4
5
6
7
8
1
2
3
4
standard levels (such as TIA/EIA-422B) to reduce the power, increase the switching speeds, and allow
operation with a 3.3-V supply rail. Any of the four current-mode drivers will deliver a minimum differential output
voltage magnitude of 247 mV into a 100-Ω load when enabled.
The intended application of these devices and signaling technique is for point-to-point baseband data
transmission over controlled impedance media of approximately 100 Ω. The transmission media may be
printed-circuit board traces, backplanes, or cables. The ultimate rate and distance of data transfer is dependent
upon the attenuation characteristics of the media and the noise coupling to the environment.
The SN75LVDS31 and SN75LVDS9638 are characterized for operation from 0°C to 70°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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 2000, Texas Instruments Incorporated
1
SN75LVDS31, SN75LVDS9638
HIGH-SPEED DIFFERENTIAL LINE DRIVERS
SLLS359A – JUNE 1999 – REVISED MARCH 2000
4
12
1
7
9
15
†
SN75LVDS31
≥ 1
EN
2
1Y
3
1Z
6
2Y
5
2Z
10
3Y
11
3Z
14
4Y
13
4Z
†
SN75LVDS9638
8
2
3
1Y
7
1Z
6
2Y
5
2Z
logic symbol
G
G
1A
2A
3A
4A
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC
Publication 617-12.
logic symbol
1A
2A
’LVDS31 logic diagram (positive logic)
4
G
12
1A
2A
3A
4A
G
1
7
9
15
10
11
14
13
2
1Y
3
1Z
6
2Y
5
2Z
3Y
3Z
4Y
4Z
’LVDS9638 logic diagram (positive logic)
8
1A
2A
2
3
1Y
7
1Z
6
2Y
5
2Z
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC
Publication 617-12.
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
HIGH-SPEED DIFFERENTIAL LINE DRIVERS
Function Tables
SN75LVDS31
INPUT
A
H H X H L
L H X L H
H X L H L
L X L L H
X L H Z Z
Open H X L H
Open X L L H
H = high level, L = low level, X = irrelevant,
Z = high impedance (off)
ENABLES OUTPUTS
G
G
SN75LVDS9638
INPUT
A
H H L
L L H
OPEN L H
H = high level, L = low level
OUTPUTS
Y Z
Y Z
SN75LVDS31, SN75LVDS9638
SLLS359A – JUNE 1999 – REVISED MARCH 2000
equivalent input and output schematic diagrams
EQUIVALENT OF EACH A INPUT EQUIVALENT OF G, G INPUTS TYPICAL OF ALL OUTPUTS
Input
7 V
50 Ω
300 kΩ
V
CC
Input
50 Ω
7 V
V
CC
10 kΩ
V
CC
5 Ω
Y or Z
Output
7 V
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
SN75LVDS31, SN75LVDS9638
HIGH-SPEED DIFFERENTIAL LINE DRIVERS
SLLS359A – JUNE 1999 – REVISED MARCH 2000
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC (see Note 1) –0.5 V to 4 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
–0.5 V to VCC + 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–65_C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
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.
NOTE 1: All voltages, except differential I/O bus voltages, are with respect to the network ground terminal.
DISSIPATION RATING TABLE
PACKAGE
D (8) 725 mW 5.8 mW/°C 464 mW
D (16) 950 mW 7.6 mW/°C 608 mW
‡
This is the inverse of the junction-to-ambient thermal resistance when board-mounted and with
no air flow.
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
‡
POWER RATING
TA = 70°C
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, V
High-level input voltage, V
Low-level input voltage, V
Operating free-air temperature, T
CC
IH
IL
A
3 3.3 3.6 V
2 V
0.8 V
0 70 °C
†
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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