SN65LBC171, SN75LBC171
TRIPLE DIFFERENTIAL TRANSCEIVERS
SLLS460A – NOVEMBER 2000 – REVISED FEBRUARY 2001
SN65LBC171DB (Marked as BL171)
SN75LBC171DB (Marked as LB171)
SN65LBC171DW (Marked as 65LBC171)
SN75LBC171DW (Marked as 75LBC171)
Three Differential Transceivers in One
Package
1
Signaling Rates Up to 30 Mbps
(TOP VIEW)
Low Power and High Speed
Designed for TIA/EIA-485, TIA/EIA-422, ISO
8482, and ANSI X3.277 (HVD SCSI Fast–20)
Applications
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1R
1DE
1D
1B
1A
RE
CDE
Common-Mode Bus Voltage Range
–7 V to 12 V
GND
GND
2R
V
CC
2B
2A
3B
3A
3D
ESD Protection on Bus Terminals
Exceeds 12 kV
2DE
2D
Driver Output Current up to ±60 mA
3R
Thermal Shutdown Protection
3DE
Driver Positive and Negative Current
Limiting
logic diagram
Power-Up, Power-Down Glitch-Free
Operation
CDE
Pin-Compatible With the SN75ALS171
1DE
1D
1A
1B
Available in Shrink Small-Outline Package
RE
1R
description
The SN65LBC171 and SN75LBC171 are
monolithic integrated circuits designed for
bidirectional data communication on multipoint
bus-transmission lines. Potential applications
include serial or paralleldatatransmission, cabled
peripheral buses with twin axial, ribbon, or
twisted-pair cabling. These devices are suitable
for FAST–20 SCSI and can transmit or receive
data pulses as short as 25 ns, with skew less than
3 ns.
2DE
2D
2A
2B
2R
3DE
3D
3A
3B
These devices combine three 3-state differential
line drivers and three differential input line
receivers, all of which operate from a single 5-V
power supply.
3R
The driver differential outputs and the receiver differential inputs are connected internally to form three
differentialinput/output(I/O)busportsthataredesignedtoofferminimumloadingtothebuswheneverthedriver
is disabled or V
party-line applications over long cable runs.
= 0. These ports feature a wide common-mode voltage range making the device suitable for
CC
The SN75LBC171 is characterized for operation over the temperature range of 0°C to 70°C. The SN65LBC171
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.
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The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second).
Copyright 2001, Texas Instruments Incorporated
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.
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