SN65LBC180 Datasheet, PDF (1/15 Pages) Texas Instruments – LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS

SN65LBC180, SN75LBC180
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
D Designed for High-Speed Multipoint Data
Transmission Over Long Cables
D Operate With Pulse Durations as Low
as 30 ns
D Low Supply Current . . . 5 mA Max
D Meet or Exceed the Requirements of ANSI
Standard RS-485 and ISO 8482:1987(E)
D 3-State Outputs for Party-Line Buses
D Common-Mode Voltage Range of
– 7 V to 12 V
D Thermal Shutdown Protection Prevents
Driver Damage From Bus Contention
D Positive and Negative Output Current
Limiting
D Pin Compatible With the SN75ALS180
description
The SN65LBC180 and SN75LBC180 differential
driver and receiver pairs are monolithic integrated
circuits designed for bidirectional data
communication over long cables that take on the
characteristics of transmission lines. They are
balanced, or differential, voltage mode devices
that meet or exceed the requirements of industry
standards ANSI RS-485 and ISO 8482:1987(E).
Both devices are designed using TI’s proprietary
LinBiCMOS™ with the low power consumption of
CMOS and the precision and robustness of
bipolar transistors in the same circuit.
Both the SN65LBC180 and SN75LBC180
combine a differential line driver and receiver with
3-state outputs and operate from a single 5-V
supply. The driver and receiver have active-high
and active-low enables, respectively, which can
be externally connected to function as a direction
control. The driver differential outputs and the
receiver differential inputs are connected to
separate terminals for full-duplex operation and
are designed to present minimum loading to the
bus whether disabled or powered off (V_CC = 0).
These parts feature a wide common-mode
voltage range making them suitable for
point-to-point or multipoint data-bus applications.
SLLS174B – FEBRUARY 1994 – REVISED JANUARY 2000
D OR N PACKAGE
(TOP VIEW)
NC ₁
R₂
RE 3
DE 4
D5
GND 6
GND 7
14 V_CC
13 V_CC
12 A
11 B
10 Z
9Y
8 NC
NC – No internal connection
INPUT
D
H
L
X
Function Tables
DRIVER
ENABLE
DE
H
H
L
OUTPUTS
YZ
HL
LH
ZZ
RECEIVER
DIFFERENTIAL INPUTS
A–B
VID ≥ 0.2 V
– 0.2 V < VID < 0.2 V
VID ≤ – 0.2 V
X
Open circuit
ENABLE
RE
L
L
L
H
L
OUTPUT
R
H
?
L
Z
H
H = high level, L = low level, ? = indeterminate, X = irrelevant,
Z = high impedance (off)
logic symbol^†
4
DE
EN1
1
5
D
1
3
RE
EN2
2
R
2
9
Y
10
Z
12
A
11
B
† _{This symbol is in accordance with ANSI/IEEE Std 91-1984}
and IEC Publication 617-12.
logic diagram (positive logic)
4
DE
5
D
3
RE
2
R
9
Y
10
Z
12
A
11
B
LinBiCMOS is a trademark of 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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Copyright © 2000, Texas Instruments Incorporated
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