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74ACTQ646SC Folha de dados(PDF) 1 Page - Fairchild Semiconductor

Nome de Peças 74ACTQ646SC
Descrição Electrónicos  Quiet Series??Octal Transceiver/Register with 3-STATE Outputs
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Fabricante Electrônico  FAIRCHILD [Fairchild Semiconductor]
Página de início  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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© 2000 Fairchild Semiconductor Corporation
DS010635
www.fairchildsemi.com
January 1990
Revised September 2000
74ACQ646 • 74ACTQ646
Quiet Series
 Octal Transceiver/Register
with 3-STATE Outputs
General Description
The ACQ/ACTQ646 consist of registered bus transceiver
circuits, with outputs, D-type flip-flops, and control circuitry
providing multiplexed transmission of data directly from the
input bus or from the internal storage registers. Data on the
A or B bus will be loaded into the respective registers on
the LOW-to-HIGH transition of the appropriate clock pin
(CPAB or CPBA). The four fundamental handling functions
available are illustrated in Figure 1, Figure 2, Figure 3 and
Figure 4.
The ACQ/ACTQ utilizes Fairchild Quiet Series
 technol-
ogy to guarantee quiet output switching and improved
dynamic threshold performance. FACT Quiet Series
 fea-
tures GTO
 output control and undershoot corrector in
addition to a split ground bus for superior performance.
Features
s Guaranteed simultaneous switching noise level and
dynamic threshold performance
s Guaranteed pin-to-pin skew AC performance
s Independent registers for A and B busses
s Multiplexed real-time and stored data transfers
s 300 mil slim dual-in-line package
s Outputs source/sink 24 mA
s Faster prop delays than the standard AC/ACT646
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
FACT
, Quiet Series, FACT Quiet Series and GTO are trademarks of Fairchild Semiconductor Corporation
Order Number
Package Number
Package Description
74ACQ646SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74ACQ464ASPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
74ACTQ646SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74ACTQ464ASPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Pin Names
Descriptions
A0–A7
Data Register A Inputs
Data Register A Outputs
B0–B7
Data Register B Inputs
Data Register B Outputs
CPAB, CPBA
Clock Pulse Inputs
SAB, SBA
Transmit/Receive Inputs
G
Output Enable Input
DIR
Direction Control Input


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