TL145406
TRIPLE RS-232 DRIVERS/RECEIVERS
SLLS185A – DECEMBER 1994 – REVISED MARCH 1995
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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
ESD Protection Exceeds 5 kV on All Pins
Flow-Through Design
Wide-Driver Supply Voltage ... ±4.5 V
to ±15 V
Functionally Interchangeable With Motorola
MC145406 and Texas Instruments
SN75C1406
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. The pinout matches the flow-through design of the SN75C1406 to reduce the board space required
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
†
†
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
1R Y
15
2R Y
13
3R Y
11
1DA
14
2DA
12
3DA
10
1RA
2
2RA
4
3RA
6
1DY
3
2DY
5
3DY
7
logic diagram (positive logic)
DY
RA
3, 5, 7
2, 4, 6
DA
RY
15, 13, 11
14, 12, 10
Typical of each receiver
Typical of each driver
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.
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.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
DD
1RA
1DY
2RA
2DY
3RA
3DY
V
SS
V
CC
1RY
1DA
2RY
2DA
3RY
3DA
GND
DW OR N PACKAGE
(TOP VIEW)
