SN65LBC170 Datasheet, PDF (1/17 Pages) Texas Instruments – TRIPLE DIFFERENTIAL TRANSCEIVERS

D Three Differential Transceivers in One
Package
D Signaling Rates^† Up to 30 Mbps
D Low Power and High Speed
D Designed for TIA/EIA-485, TIA/EIA-422, ISO
8482, and ANSI X3.277 (HVD SCSI Fast–20)
Applications
D Common-Mode Bus Voltage Range
–7 V to 12 V
D ESD Protection on Bus Terminals
Exceeds 12 kV
D Driver Output Current up to ±60 mA
D Thermal Shutdown Protection
D Driver Positive and Negative Current
Limiting
D Power-Up, Power-Down Glitch-Free
Operation
D Pin-Compatible With the SN75ALS170
D Available in Shrink Small-Outline Package
description
The SN65LBC170 and SN75LBC170 are
monolithic integrated circuits designed for
bidirectional data communication on multipoint
bus-transmission lines. Potential applications
include serial or parallel data transmission, 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.
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.
The driver differential outputs and the receiver
differential inputs are connected internally to form
three differential input/output (I/O) bus ports that
are designed to offer minimum loading to the bus
whenever the driver is disabled or V_CC = 0. These
ports feature a wide common-mode voltage range
making the device suitable for party-line
applications over long cable runs.
SN65LBC170, SN75LBC170
TRIPLE DIFFERENTIAL TRANSCEIVERS
SLLS459B – NOVEMBER 2000 – REVISED FEBRUARY 2002
SN65LBC170DB (marked as BL170)
SN75LBC170DB (marked as BL170)
(TOP VIEW)
1D 1
1DIR 2
NC 3
GND 4
2D 5
2DIR 6
3D 7
3DIR 8
16 1B
15 1A
14 NC
13 V_CC
12 2B
11 2A
10 3B
9 3A
SN65LBC170DW (marked as 65LBC170)
SN75LBC170DW (marked as 75LBC170)
(TOP VIEW)
1D 1
1DIR 2
NC 3
GND 4
NC 5
2D 6
2DIR 7
NC 8
3D 9
3DIR ¹⁰
20 1B
19 1A
18 NC
17 NC
16 V_CC
15 2B
14 2A
13 3B
12 3A
11 _NC
NC – No internal connection
logic diagram
1DIR
1A
1B
1D
2DIR
2A
2B
2D
3DIR
3A
3B
3D
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.
†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).}
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.
Copyright  2002, Texas Instruments Incorporated
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