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DM54S194 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. DM54S194
Description  4-Bit Bidirectional Universal Shift Registers
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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DM54S194 Datasheet(HTML) 1 Page - National Semiconductor (TI)

   
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TLF6475
June 1989
DM54S194DM74S194
4-Bit Bidirectional Universal Shift Registers
General Description
These bidirectional shift registers are designed to incorpo-
rate virtually all of the features a system designer may want
in a shift register they feature parallel inputs parallel out-
puts right-shift and left-shift serial inputs operating-mode-
control inputs and a direct overriding clear line The register
has four distinct modes of operation namely
Parallel (broadside) load
Shift right (in the direction QA toward QD)
Shift left (in the direction QD toward QA)
Inhibit clock (do nothing)
Synchronous parallel loading is accomplished by applying
the four bits of data and taking both mode control inputs S0
and S1 high The data are loaded into the associated flip-
flops and appear at the outputs after the positive transition
of the clock input During loading serial data flow is inhibit-
ed
Shift right is accomplished synchronously with the rising
edge of the clock pulse when S0 is high and S1 is low
Serial data for this mode is entered at the shift-right data
input When S0 is low and S1 is high data shifts left syn-
chronously and new data is entered at the shift-left serial
input
Clocking of the flip-flop is inhibited when both mode control
inputs are low
Features
Y
Parallel inputs and outputs
Y
Four operating modes
Synchronous parallel load
Right shift
Left shift
Do nothing
Y
Positive edge-triggered clocking
Y
Direct overriding clear
Y
Typical clock frequency 105 MHz
Y
Typical power dissipation 425 mW
Connection Diagram
Dual-In-Line Package
TLF6475 – 1
Order Number DM54S194J or DM74S194N
See NS Package Number J16A or N16E
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


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