SN65LBC180A, SN75LBC180A
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
SLLS378B – MAY 2000 – REVISED SEPTEMBER 2000
D
D
D
D
D
D
D
D
D
High-Speed Low-Power LinBICMOS™
Circuitry Designed for Signaling Rates† of
up to 30 Mbps
Bus-Pin ESD Protection Exceeds 12 kV
HBM
Very Low Disabled Supply-Current
Requirements . . . 700 µA Maximum
Designed for High-Speed Multipoint Data
Transmission Over Long Cables
Common-Mode Voltage Range of
– 7 V to 12 V
Low Supply Current . . . 15 mA Max
Compatible With ANSI Standard
TIA/EIA-485-A and ISO 8482:1987(E)
Positive and Negative Output Current
Limiting
Driver Thermal Shutdown Protection
description
The SN65LBC180A and SN75LBC180A
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 are compatible with ANSI standard
TIA/EIA-485-A and ISO 8482:1987(E). The A
version offers improved switching performance
over its predecessors without sacrificing
significantly more power.
SN65LBC180AD (Marked as BL180A)
SN65LBC180AP (Marked as 65LBC180A)
SN75LBC180AD (Marked as LB180A)
SN75LBC180AP (Marked as 75LBC180A)
(TOP VIEW)
NC
R
RE
DE
D
GND
GND
1
14
2
13
3
12
4
11
5
10
6
9
7
8
VCC
VCC
A
B
Z
Y
NC
NC – No internal connection
Function Tables
DRIVER
INPUT
D
H
L
X
Open
ENABLE
DE
H
H
L
H
OUTPUTS
Y
Z
H
L
L
H
Z
Z
H
L
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)
These devices combine a differential line driver and differential input line receiver and operate from a single 5-V
power supply. 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 when powered off
(VCC = 0). These parts feature wide positive and negative common-mode voltage ranges, making them suitable
for point-to-point or multipoint data bus applications. The devices also provide positive and negative current
limiting for protection from line fault conditions. The SN65LBC180A is characterized for operation from – 40°C
to 85°C, and the SN75LBC180A is 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.
† Signaling rate by TIA/EIA-485-A definition restrict transition times to 30% of the bit length, and much higher signaling rates may be achieved
without this requirement as displayed in the TYPICAL CHARACTERISTICS of this device.
LinBiCMOS is a trademark of Texas Instruments.
Copyright © 2000, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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