SN75185 Datasheet, PDF (1/10 Pages) Texas Instruments – MULTIPLE RS-232 DRIVERS AND RECEIVERS

SN75185
MULTIPLE RS-232 DRIVERS AND RECEIVERS
D Single Chip With Easy Interface Between
UART and Serial Port Connector of IBM
PC/AT ™ and Compatibles
D Three Drivers and Five Receivers Meet or
Exceed the Requirements of TIA / EIA-232-F
and ITU v.28 Standards
D Designed to Support Data Rates Up To
120 kbps
D ESD Protection Meets or Exceeds 10 kV on
RS-232 Pins and 5 kV on All Other Pins
(Human-Body Model)
D Pinout Compatible With the SN75C185
SLLS181A – DECEMBER 1994 – REVISED NOVEMBER 1998
DW OR N PACKAGE
(TOP VIEW)
V_{DD 1}
RA1 ₂
RA2 3
RA3 4
DY1 5
DY2 6
RA4 7
DY3 8
RA5 9
V_SS 10
20 ^V_CC
19 ^RY1
18 RY2
17 RY3
16 DA1
15 DA2
14 RY4
13 DA3
12 RY5
11 GND
description
The SN75185 combines three drivers and five receivers from TI trade-standard SN75188 and SN75189 bipolar
quadruple drivers and receivers, respectively. The pinout matches the flow-through design of the SN75C185
to decrease the part count, reduce the board space required, and allow easy interconnection of the UART and
serial-port connector of IBM™ PC/AT ™ and compatibles. The bipolar circuits and processing of the SN75185
provides a rugged low-cost solution for this function at the expense of quiescent power and external passive
components relative to the SN75C185.
The SN75185 complies with the requirements of the TIA/EIA-232-F and ITU (formerly CCITT) v.28 standards.
These standards are for data interchange between a host computer and peripheral at signaling rates up to
20 kbit/s. The switching speeds of the SN75185 are fast enough to support rates up to 120 kbit/s with lower
capacitive loads (shorter cables). Interoperability at the higher signaling rates cannot be assured unless the
designer has design control of the cable and the interface circuits at both ends. For interoperability at signaling
rates to 120 kbit/s, use of TIA/EIA-423-B (ITU v.10) and TIA/EIA-422-B (ITU v.11) standards are recommended.
The SN75185 is characterized for operation over the temperature range of 0°C to 70°C.
logic symbol^†
2
RA1
3
RA2
4
RA3
5
DY1
6
DY2
7
RA4
8
DY3
9
RA5
19
RY1
18
RY2
17
RY3
16
DA1
15
DA2
14
RY4
13
DA3
12
RY5
† _{This symbol is in accordance with ANSI/IEEE Std 91-1984}
and IEC Publication 617-12.
logic diagram (positive logic)
RA1
RY1
RA2
RY2
RA3
DY1
RY3
DA1
DY2
DA2
RA4
RY4
DY3
DA3
RA5
RY5
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.
IBM and PC/AT are trademarks of IBM Corporation.
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.
Copyright © 1998, Texas Instruments Incorporated
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