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74ACQ657CW View Datasheet(PDF) - Fairchild Semiconductor

Part NameDescriptionManufacturer
74ACQ657CW Quiet Series™ Octal Bidirectional Transceiver with 8-Bit Parity Generator/Checker and 3-STATE Outputs Fairchild
Fairchild Semiconductor Fairchild
74ACQ657CW Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
January 1990
Revised September 2000
74ACQ657 • 74ACTQ657
Quiet SeriesOctal Bidirectional Transceiver with
8-Bit Parity Generator/Checker and 3-STATE Outputs
General Description
The ACQ/ACTQ657 contains eight non-inverting buffers
with 3-STATE outputs and an 8-bit parity generator/
checker. Intended for bus oriented applications, the device
combines the 245 and the 280 functions in one package.
The ACQ/ACTQ utilizes Fairchild Quiet Seriestechnol-
ogy to guarantee quiet output switching and improved
dynamic threshold performance. FACT Quiet Series fea-
tures GTOoutput control and undershoot corrector in
addition to a split ground bus or superior performance.
Features
s Guaranteed simultaneous switching noise level and
dynamic threshold performance
s Guaranteed pin-to-pin skew AC performance
s Combines the 245 and the 280 functions in one package
s 300 mil 24-pin slim dual-in-line package
s Outputs source/sink 24 mA
s ACTQ has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74ACQ657SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
74ACTQ657SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74ACTQ657SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
A0–A7
B0–B7
T/R
OE
PARITY
ODD/EVEN
ERROR
Description
Data Inputs/3-STATE Outputs
Data Inputs/3-STATE Outputs
Transmit/Receive Input
Enable Input
Parity Input/3-STATE Output
ODD/EVEN Parity Input
Error 3-STATE Output
FACT, Quiet Series, FACT Quiet Series, and GTOare trademarks of Fairchild Semiconductor Corporation.
© 2000 Fairchild Semiconductor Corporation DS010636
www.fairchildsemi.com
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