TL145406
TRIPLE RS-232 DRIVERS/RECEIVERS
SLLS185A – DECEMBER 1994 – REVISED MARCH 1995
DW OR N PACKAGE
(TOP VIEW)
Meets or Exceeds the Requirements of
ANSI EIA/TIA-232-E and ITU V.28
Designed to Support Data Rates Up to
120 kbits/s Over 3-m Cable
V
V
1
2
3
4
5
6
7
8
16
15
14
CC
DD
1RY
1DA
1RA
1DY
2RA
2DY
3RA
3DY
ESD Protection Exceeds 5 kV on All Pins
Flow-Through Design
13 2RY
12 2DA
Wide-Driver Supply Voltage . . . ±4.5 V
to ±15 V
11
10
9
3RY
3DA
GND
Functionally Interchangeable With Motorola
MC145406 and Texas Instruments
SN75C1406
V
SS
description
The TL145406 is a bipolar device containing three independent drivers and receivers that are used to interface
data terminal equipment (DTE) with data circuit-terminating equipment (DCE). The drivers and receivers of the
TL145406 are similar to those of the SN75188 quadruple driver and SN75189A quadruple receiver,
respectively. Thepinoutmatchestheflow-throughdesignoftheSN75C1406toreducetheboardspacerequired
and allow easy interconnection. The bipolar circuits and processing of the TL145406 provide a rugged low-cost
solution for this function at the expense of quiescent power and external passive components relative to the
SN75C1406.
The TL145406 complies with the requirements of the EIA/TIA 232-E and ITU (formerly CCITT) V.28 standards.
These standards are for data interchange between a host computer and peripheral at signalling rates up to
20 kbit/s. The switching speeds of the TL145406 are fast enough to support rates up to 120 kbit/s with lower
capacitive loads (shorter cables). Interoperability at the higher signalling rates cannot be assured unless the
designer has design control of the cable and the interface circuits at both ends. For interoperability at signalling
rates to 120 kbit/s, use of EIA/TIA-423-B (ITU V.10) and EIA/TIA-422-B (ITU V.11) standards are recommended.
The TL145406 is characterized for operation from 0°C to 70°C.
†
logic symbol
logic diagram (positive logic)
Typical of each receiver
2
4
6
3
15
13
11
14
12
10
1RA
2RA
3RA
1DY
1RY
2RY
3RY
1DA
2DA
3DA
2, 4, 6
RA
15, 13, 11
14, 12, 10
RY
DA
Typical of each driver
5
7
2DY
3DY
3, 5, 7
DY
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
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.
Copyright 1995, 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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