SLLS261K − JULY 1997 − REVISED MARCH 2004
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D Meet or Exceed the Requirements of ANSI
TIA/EIA-644 Standard
D Low-Voltage Differential Signaling With
Typical Output Voltage of 350 mV and
100-Ω Load
D Typical Output Voltage Rise and Fall Times
of 500 ps (400 Mbps)
D Typical Propagation Delay Times of 1.7 ns
D Operate From a Single 3.3-V Supply
D Power Dissipation 25 mW Typical Per
Driver at 200 MHz
D Driver at High Impedance When Disabled or
With V
CC
= 0
D Bus-Terminal ESD Protection Exceeds 8 kV
D Low-Voltage TTL (LVTTL) Logic Input
Levels
D Pin Compatible With AM26LS31, MC3487,
and µA9638
description
The SN55LVDS31, SN65LVDS31,
SN65LVDS3487, and SN65LVDS9638 are
differential line drivers that implement the
electrical characteristics of low-voltage differential
signaling (LVDS). This signaling technique lowers
the output voltage levels of 5-V differential
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 delivers 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 both point-to-point and
multidrop (one driver and multiple receivers) 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 SN65LVDS31, SN65LVDS3487, and
SN65LVDS9638 are characterized for operation
from −40°C to 85°C. The SN55LVDS31 is
characterized for operation from −55°C to 125°C.
Copyright 1997 − 2004, Texas Instruments Incorporated
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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.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1A
1Y
1Z
G
2Z
2Y
2A
GND
V
CC
4A
4Y
4Z
G
3Z
3Y
3A
SN55LVDS31 ... J OR W
SN65LVDS31 ...D OR PW
(Marked as LVDS31 or 65LVDS31)
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1A
1Y
1Z
1,2EN
2Z
2Y
2A
GND
V
CC
4A
4Y
4Z
3,4EN
3Z
3Y
3A
SN65LVDS3487D
(Marked as LVDS3487 or 65LVDS3487)
(TOP VIEW)
1
2
3
4
8
7
6
5
V
CC
1A
2A
GND
1Y
1Z
2Y
2Z
SN65LVDS9638D (Marked as DK638 or LVDS38)
SN65LVDS9638DGN (Marked as L38)
SN65LVDS9638DGK (Marked as AXG)
(TOP VIEW)
1920132
17
18
16
15
14
1312119 10
5
4
6
7
8
4Y
4Z
NC
G
3Z
1Z
G
NC
2Z
2Y
1Y
1A
NC
V
4A
GND
NC
3A
3Y
2A
SN55LVDS31FK
(TOP VIEW)
CC
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