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74LS194A Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 74LS194A
Description  4-Bit Bidirectional Universal Shift Register
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com

74LS194A Datasheet(HTML) 1 Page - National Semiconductor (TI)

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June 1989
54LS194ADM74LS194A 4-Bit
Bidirectional Universal Shift Register
General Description
This bidirectional shift register is designed to incorporate
virtually all of the features a system designer may want in a
shift register they feature parallel inputs parallel outputs
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 is 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-
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
Clocking of the flip-flop is inhibited when both mode control
inputs are low
Parallel inputs and outputs
Four operating modes
Synchronous parallel load
Right shift
Left shift
Do nothing
Positive edge-triggered clocking
Direct overriding clear
Connection Diagram
Dual-In-Line Package
TLF6407 – 1
Order Number 54LS194ADMQB 54LS194AFMQB
54LS194ALMQB DM74LS194AM or DM74LS194AN
See NS Package Number E20A J16A M16A N16E or W16A
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A

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