Rochester ID8251A Programmable communication interface 28-pin dip package Datasheet

8251A
© 2012 Rochester Electronics, LLC. All Rights Reserved 12192012
ynchronous Receiver/Transmitter (USART)
The 8251A is the industry standard Universal Synchronous/As
such as MCS-48, 80, 85, and iAPX 86, 88.
designed for data communications with microprocessor families
CPU to operate using virtually any serial
the
by
med
program
is
and
device
al
peripher
The 8251A is used as a
). The USART accepts data characters
“bi-sync”
IBM
g
data transmission technique presently in use (includin
us serial data stream for transmission.
continuo
a
into
them
converts
then
and
format
parallel
in
from the CPU
parallel data characters for the CPU.
into
them
convert
and
streams
Simultaneously, it can receive serial data
for transmission or whenever it has
r
characte
The USART will signal the CPU whenever it can accept a new
of the USART at any time. These
status
complete
the
read
can
CPU
The
CPU.
the
received a character for
Y. The chip is fabricated using
TxEMPT
,
SYNDET
as
such
include data transmission errors and control signals
gy.
technolo
HMOS
nce
performa
Intel’s high
* For complete Rochester ordering guide, please refer to page 2 *
Rochester Electronics guarantees performance of its semiconductor products to the original OEM specifications. “Typical” values are for reference purposes
only. Certain minimum or maximum ratings may be based on product characterization, design, simulation, or sample testing. Rochester Electronics reserves
the right to make changes without further notice to any specification herein.
Specification Number 8251A-CI (I) REV A
Page 1 of 11
8251A
Rochester Ordering Guide
Package
Temperature
D8251A
Rochester Part Number
D8251A
OCM Part Number
DIP-28
0° to +70°C
ID8251A
ID8251A
DIP-28
-40° to +85°C
LD8251A
LD8251A
DIP-28
-40° to +85°C
P8251A
P8251A
DIP-28
0° to +70°C
QD8251A
QD8251A
DIP-28
0° to +70°C
QP8251A
QP8251A
DIP-28
0° to +70°C
TD8251A
TD8251A
DIP-28
-40° to +85°C
Specification Number 8251A-CI (I) REV A
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8251A
Specification Number 8251A-CI (I) REV A
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8251A
Specification Number 8251A-CI (I) REV A
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8251A
Specification Number 8251A-CI (I) REV A
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8251A
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8251A
Specification Number 8251A-CI (I) REV A
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8251A
Specification Number 8251A-CI (I) REV A
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8251A
Specification Number 8251A-CI (I) REV A
Page 9 of 11
8251A
Specification Number 8251A-CI (I) REV A
Page 10 of 11
8251A
Rochester Electronics guarantees performance of its semiconductor products to the original OEM specifications. “Typical” values are for reference purposes
only. Certain minimum or maximum ratings may be based on product characterization, design, simulation, or sample testing. Rochester Electronics reserves
the right to make changes without further notice to any specification herein.
Specification Number 8251A-CI (I) REV A
Page 11 of 11
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