74164: Shift Register, 8 Bits (Serial Input, Parallel Output)

This is an eight-stage, shift-right-only shift register. It may be used as a serial-in/serial-out or serial-in/parallel-out.

For normal operation, one of the Serial inputs is held high and data is sent to the second serial input. Clear is held high. Every negative-to-positive transition (positive edge) of the clock shifts the data one stage to the right.

For instance, the data on the input gets shifted into A. A goes to B. B goes to C. C goes to D. D goes to E. E goes to F. F goes to G. G goes to H. H goes to a following stage or is destroyed.

The contents of the register may be cleared to zero by briefly bringing the Clear input low. Both Serial inputs must be high to enter a high-input state. Bringing either Serial input low forces a low-input condition.

The clock must be bounceless and noise free, producing one, and only one, positive transition per desired shift.

Pinout
Pin # Pin Assignment
1 Serial Input 1
2 Serial Input 2
3 Output A
4 Output B
5 Output C
6 Output D
7 Ground
8 Clock
9 Clear
10 Output E
11 Output F
12 Output G
13 Output H
14 Power (+5V)

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