SN75185_07 Datasheet, PDF (1/21 Pages) Texas Instruments – MULTIPLE RS-232 DRIVERS AND RECEIVERS

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FEATURES
• Single Chip With Easy Interface Between
UART and Serial-Port Connector of
IBM™ PC/AT™ and Compatibles
• Meets or Exceeds the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
• Supports Data Rates up to 120 kbit/s
• ESD Protection Meets or Exceeds 10 kV on
RS-232 Pins and 3.5 kV on All Other Pins
(Human-Body Model)
• Pin-to-Pin Compatible With the SN75C185
DESCRIPTION/ORDERING INFORMATION
The SN75185 combines three drivers and five
receivers from the TI 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 provide 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 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 is
recommended.
The SN75185 is characterized for operation over the
temperature range of 0°C to 70°C.
SN75185
MULTIPLE RS-232 DRIVERS AND RECEIVERS
SLLS181D – DECEMBER 1994 – REVISED JANUARY 2006
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 VCC
19 RY1
18 RY2
17 RY3
16 DA1
15 DA2
14 RY4
13 DA3
12 RY5
11 GND
DB, DW, OR PW 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
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
IBM, PC/AT are trademarks of IBM Corporation.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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