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9334FMQB Datasheet

8-Bit Addressable Latch

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9334FMQB pdf
June 1989
9334 DM9334 8-Bit Addressable Latch
General Description
The DM9334 is a high speed 8-bit Addressable Latch de-
signed for general purpose storage applications in digital
systems It is a multifunctional device capable of storing sin-
gle line data in eight addressable latches and being a one-
of-eight decoder and demultiplexer with active level high
outputs The device also incorporates an active level low
common clear for resetting all latches as well as an active
level low enable
The DM9334 has four modes of operation which are shown
in the mode selection table In the addressable latch mode
data on the data line (D) is written into the addressed latch
The addressed latch will follow the data input with all non-
addressed latches remaining in their previous states In the
memory mode all latches remain in their previous state and
are unaffected by the data or address inputs
In the one-of-eight decoding or demultiplexing mode the
addressed output will follow the state of the D input with all
other inputs in the low state In the clear mode all outputs
are low and unaffected by the address and data inputs
When operating the device as an addressable latch chang-
ing more than one bit of the address could impose a tran-
sient wrong address Therefore this should only be done
while in the memory mode
The function tables summarize the operation of the product
Features
Y Common clear
Y Easily expandable
Y Random (addressable) data entry
Y Serial to parallel capability
Y 8 bits of storage output of each bit available
Y Active high demultiplexing decoding capability
Y Alternate Military Aerospace device (9334) is available
Contact a National Semiconductor Sales Office Distrib-
utor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6609 – 1
Order Number 9334DMQB 9334FMQB DM9334J or DM9334N
See NS Package Number J16A N16E or W16A
C1995 National Semiconductor Corporation TL F 6609
RRD-B30M105 Printed in U S A
National Semiconductor
National Semiconductor



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