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STMicroelectronics Electronic Components Datasheet

ST75185 Datasheet

MULTIPLE RS-232 DRIVERS AND RECEIVERS

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® ST75185
MULTIPLE RS-232 DRIVERS AND RECEIVERS
s MEETS AND EXCEEDS THE
REQUIREMENTS OF EIA/TIA-232-E AND
ITUV.28 STANDARD
s SINGLE CHIP WITH EASY INTERFACE
BETWEEN UART AND SERIAL PORT
CONNECTOR OF IBM PC/ATAND
COMPATIBLES
s DESIGNED TO SUPPORT DATA RATES UP
TO 120 Kbps
s PINOUT COMPATIBLE WITH ST75C185
DESCRIPTION
The ST75185 contains three drivers and five
receivers. The pinout matches the DB9S
connector design in order to decrease the part
count, reduce the board space required and allow
easy interconnection of the UART and serial port
connector of IBM PC/ATand compatibles. The
bipolar circuits and processing of the ST75185
provides a rugged low-cost solution for this
function at the expense of quiescent power and
external passive components relative to the
ST75C185.
The ST75185 complies with the requirements of
the EIA/TIA 232-E and ITU (formally CCITT) v.28
ND
(Plastic Package)
(Micro Package)
ORDER CODES :
ST75185CN
ST75185CD
standards. These standards are for data
interchange between a host computer and
peripheral at signalling rates up to 20k-bits/s. The
switching speeds of the ST75185 are fast enough
to support rates up to 120K-bits/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 the both ends.
For interoperability at signalling rates to 120
K-bits/s, use of EIA/ITA-423-B (ITU v.10) and
EIA/ITA-422-B (ITU v.11) standards are
recommended.
The ST75185 is characterized for operation over
the range of 0oC to 70oC.
PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAM
June 2000
1/12


STMicroelectronics Electronic Components Datasheet

ST75185 Datasheet

MULTIPLE RS-232 DRIVERS AND RECEIVERS

No Preview Available !

ST75185
ORDER CODES
T ype
ST75185CN
ST75185CD
ST75185CDR
Temperature Range
0 to 70 oC
0 to 70 oC
0 to 70 oC
Package
DIP-20
SO-20 (Tube)
SO-20 (Tape & Reel)
Comments
20 parts per tube / 50 tubes per box
40 parts per tube / 25 tubes per box
1000 parts per reel
PIN DESCRIPTION
PIN No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SYMBOL
VDD
RA1
RA2
RA3
DY1
DY2
RA4
DY3
RA5
VSS
GND
RY5
DA3
RY4
DA2
DA1
RY3
RY2
RY1
VCC
NAME AND FUNCTION
Supply Voltage (+12V)
First Receiver Input
Second Receiver Input
Third Receiver Input
First Driver Output
Second Driver Output
FourthReceiver Input
Third Driver Output
Fifth Receiver Input
Supply Voltage (-12V)
Ground
Fifth Receiver Output
Third Driver Input
Fourth Receiver Output
Second Driver Input
First Driver Input
Third Receiver Output
Second Receiver Output
First Receiver Output
Supply Voltage (+5V)
2/12


Part Number ST75185
Description MULTIPLE RS-232 DRIVERS AND RECEIVERS
Maker ST Microelectronics
Total Page 12 Pages
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