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CD4034BC

更新时间: 2024-11-03 22:54:19
品牌 Logo 应用领域
美国国家半导体 - NSC /
页数 文件大小 规格书
12页 200K
描述
8-Stage TRI-STATE Bidirectional Parallel/Serial Input/Output Bus Register

CD4034BC 数据手册

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February 1988  
CD4034BM/CD4034BC 8-Stage TRI-STATE Bidirectional  
É
Parallel/Serial Input/Output Bus Register  
General Description  
The CD4034BM/CD4034BC is an 8-bit CMOS static shift  
register with two parallel bidirectional data ports (A and B)  
which, when combined with serial shifting operations, can  
be used to (1) bidirectionally transfer parallel data between  
two buses, (2) convert serial data to parallel form and direct  
them to either of two buses, (3) store (recirculate) parallel  
data, or (4) accept parallel data from either of two buses  
and convert them to serial form. These operations are con-  
trolled by five control inputs:  
All register stages are D-type master-slave flip-flops with  
separate master and slave clock inputs generated internally  
to allow synchronous or asynchronous data transfer from  
master to slave.  
All inputs are protected against damage due to static dis-  
.
SS  
charge by diode clamps to V  
and V  
DD  
Features  
Y
Wide supply voltage range  
High noise immunity  
Low power TTL  
3.0V to 18V  
0.45 V (typ.)  
A ENABLE (AE): ‘‘A’’ data port is enabled only when AE  
is at logical ‘‘1’’. This allows the use of a common bus  
for multiple packages.  
Y
Y
DD  
Fan out of 2 driving 74L  
or 1 driving 74LS  
compatibility  
A-BUS-TO-B-BUS/B-BUS-TO-A-BUS (A/B): This input  
controls the direction of data flow. When at logical ‘’1’’,  
data flows from port A to B (A is input, B is output).  
When at logical ‘‘0’’, the data flow direction is reversed.  
Y
RCA CD4034B second source  
Applications  
Y
Parallel Input/Parallel Output  
Parallel Input/Serial Output  
Serial Input/Parallel Output  
Serial Input/Serial Output register  
Shift right/shift left register  
ASYNCHRONOUS/SYNCHRONOUS (A/S): When A/S  
is at logical ‘‘0’’, data transfer occurs at positive tran-  
sition of the CLOCK. When A/S is at logical ‘‘1’’, data  
transfer is independent of the CLOCK for parallel opera-  
tion. In serial mode, A/S input is internally disabled such  
that operation is always synchronous. (Asynchronous  
serial operation is not possible.)  
Y
Y
Y
Y
Y
Shift right/shift left with parallel loading  
Address register  
Buffer register  
PARALLEL/SERIAL (P/S): A logical ‘‘1’’ P/S input al-  
lows data transfer into the registers via A or B port (syn-  
Bus system register with enable parallel lines at bus  
side  
e
e
logical ‘‘0’’, asynchronous if A/S  
chronous if A/S  
Y
Y
Y
Y
Y
Double bus register system  
logical ‘‘1’’). A logical ‘‘0’’ P/S allows serial data to  
transfer into the register synchronously with the positive  
transition of the CLOCK, independent of the A/S input.  
Up-down Johnson or ring counter  
Pseudo-random code generators  
Sample and hold register (storage, counting, display)  
Frequency and phase comparator  
CLOCK: Single phase, enabled only in synchronous  
e
logical ‘‘0’’  
e
logical ‘‘0’’.  
mode. (Either P/S  
e
logical ‘‘1’’ and A/S  
or P/S  
Connection Diagram  
Dual-In-Line Package  
Order Number CD4034B  
TL/F/5963–1  
Top View  
TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.  
C
1995 National Semiconductor Corporation  
TL/F/5963  
RRD-B30M105/Printed in U. S. A.  

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