Datasheet

1
FEATURES
1
2
3
4
5
6
7
14
13
12
11
10
9
8
NC
R
RE
DE
D
GND
GND
V
CC
V
CC
A
B
Z
Y
NC
SN65LBC180AD(MarkedasBL180A)
SN65LBC180AN(Markedas65LBC180A)
SN75LBC180AD(MarkedasLB180A)
SN75LBC180AN(Markedas75LBC180A)
(TOP VIEW)
NC −Nointernalconnection
Pins6and7areconnectedtogetherinternally
Pins13and14areconnectedtogetherinternally
DESCRIPTION
SN65LBC180A
SN75LBC180A
www.ti.com ............................................................................................................................................................... SLLS378D – MAY 2000 – REVISED APRIL 2009
LOW-POWER DIFFERENTIAL LINE DRIVER AND RECEIVER PAIRS
2
• High-Speed Low-Power LinBICMOS™ Circuitry
Designed for Signaling Rates
(1)
of up to
30 Mbps
• Bus-Pin ESD Protection 15 kV HBM
• Low Disabled Supply-Current Requirements:
700 µ A 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
(1)
Signaling rate by TIA/EIA-485-A definition restrict transition
times to 30% of the bit duration, and much higher signaling
rates may be achieved without this requirement as displayed
in the TYPICAL CHARACTERISTICS of this device.
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.
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
(V
CC
= 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.
FUNCTION TABLE
(1)
DRIVER RECEIVER
DIFFERENTIAL INPUTS ENABLE OUTPUT
OUTPUTS
INPUT ENABLE
A – B RE R
D DE
Y Z V
ID
≥ 0.2 V L H
H H H L -0.2 V < V
ID
< 0.2 V L ?
L H L H V
ID
≤ -0.2 V L L
X L Z Z X H Z
OPEN H H L Open circuit L H
(1) H = high level, L = low level, ? = indeterminate, X = irrelevant, Z = high impedance (off)
1
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.
2 LinBICMOS is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000 – 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.