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Fairchild Semiconductor - Quiet Series Octal Bidirectional Transceiver

Numéro de référence 74ACTQ657
Description Quiet Series Octal Bidirectional Transceiver
Fabricant Fairchild Semiconductor 
Logo Fairchild Semiconductor 





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74ACTQ657 fiche technique
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
A0A7
B0B7
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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