Datasheet

SN55LBC176, SN65LBC176, SN65LBC176Q, SN75LBC176
DIFFERENTIAL BUS TRANSCEIVERS
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SLLS067H − AUGUST 1990 − REVISED DECEMBER 2010
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description (continued)
The SN55LBC176, SN65LBC176, SN65LBC176Q, and SN75LBC176 combine a 3-state, differential line driver
and a differential input line receiver, both of which operate from a single 5-V power supply. The driver and
receiver have active-high and active-low enables, respectively, which can externally connect together to
function as a direction control. The driver differential outputs and the receiver differential inputs connect
internally to form a differential input/output (I/O) bus port that is designed to offer minimum loading to the bus
whenever the driver is disabled or V
CC
= 0. This port features wide positive and negative common-mode voltage
ranges, making the device suitable for party-line applications. Very low device supply current can be achieved
by disabling the driver and the receiver.
These transceivers are suitable for ANSI Standard TIA/EIA−485 (RS-485) and ISO 8482 applications to the
extent that they are specified in the operating conditions and characteristics section of this data sheet. Certain
limits contained in TIA/EIA−485−A and ISO 8482:1987 (E) are not met or cannot be tested over the entire military
temperature range.
The SN55LBC176 is characterized for operation from − 55°C to 125°C. The SN65LBC176 is characterized for
operation from −40°C to 85°C, and the SN65LBC176Q is characterized for operation from −40°C to 125°C.
The SN75LBC176 is characterized for operation from 0°C to 70°C.
logic symbol
†
logic diagram (positive logic)
2
EN1
B
A
1
4
2
R
D
RE
7
6
D
RE
R
7
6
4
1
2
B
A
Bus
3
EN2
1
1
DE
3
DE
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
AVAILABLE OPTIONS
T
A
PACKAGE PART NUMBER PART MARKING
0°C to 70°C
SOP SN75LBC176D 7LB176
0°C to 70°C
PDIP SN75LBC176P 75LBC176
40°C to 85°C
SOP SN65LBC176D 6LB176
−40°C to 85°C
PDIP SN65LBC176P 65LBC176
40°C to 125°C
SOP SN65LBC176QD LB176Q
−40°C to 125°C
SOP SN65LBC176QDR LB176Q
55°C to 125°C
LCCC SNJ55LBC176FK SNJ55LBC176FK
−55°C to 125°C
CDIP SNJ55LBC176JG SNJ55LBC176