SN74ALS164A
8-BIT PARALLEL-OUT SERIAL SHIFT REGISTER
SDAS159D - APRIL 1982 - REVISED DECEMBER 1994
features
- AND-Gated (Enable/Disable) Serial Inputs
- Fully Buffered Clock and Serial Inputs
- Direct Clear
- Package Options Include Plastic Small-Outline (D) Packages and
Standard Plastic (N) 300-mil DIPs
description
This 8-bit parallel-out serial shift register features AND-gated
serial (A and B) inputs and an asynchronous clear (
) input. The gated serial inputs
permit control over incoming data because a low at either input
inhibits entry of the new data and resets the first flip-flop to the
low level at the next clock pulse. A high-level input enables the
other input, which determines the state of the first flip-flop. Data
at the serial inputs can be changed while the clock is high or low,
provided that the minimum setup-time requirements are met. Clocking
occurs on the low-to-high-level transition of the clock (CLK) input.
All inputs are diode clamped to minimize transmission-line effects.
The SN74ALS164A is characterized for operation from 0°C to
70°C.