74ACQ464ASPC
器件描述：Quiet Series⑩ Octal Transceiver/Register with 3-STATE Outputs
器件厂商：FAIRCHILD [Fairchild Semiconductor]
文件大小：97.17KB，共10页
Sponsor by e络盟器件资料摘要：
© 2000 Fairchild Semiconductor Corporation DS010635 www.fairchildsemi.com
January 1990
Revised September 2000
7
4
AC
Q646 • 74AC
T
Q
6
4
6
Qui
e
t Seri
es
Oct
a
l T
r
a
n
sceiv
e
r/
R
e
gist
er wit
h
3-
ST
A
T
E Output
s
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
a73 Guaranteed simultaneous switching noise level and
dynamic threshold performance
a73 Guaranteed pin-to-pin skew AC performance
a73 Independent registers for A and B busses
a73 Multiplexed real-time and stored data transfers
a73 300 mil slim dual-in-line package
a73 Outputs source/sink 24 mA
a73 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
A
0
–A
7
Data Register A Inputs
Data Register A Outputs
B
0
–B
7
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
January 1990
Revised September 2000
7
4
AC
Q646 • 74AC
T
Q
6
4
6
Qui
e
t Seri
es
Oct
a
l T
r
a
n
sceiv
e
r/
R
e
gist
er wit
h
3-
ST
A
T
E Output
s
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
a73 Guaranteed simultaneous switching noise level and
dynamic threshold performance
a73 Guaranteed pin-to-pin skew AC performance
a73 Independent registers for A and B busses
a73 Multiplexed real-time and stored data transfers
a73 300 mil slim dual-in-line package
a73 Outputs source/sink 24 mA
a73 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
A
0
–A
7
Data Register A Inputs
Data Register A Outputs
B
0
–B
7
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