54F322 Octal Serial Parallel Register with Sign Extend is an 8-bit shift register from National Semiconductor Corporation, which can be loaded either in serial or parallel and has TRI-STATE parallel outputs and a bi-state serial output. Parallel data inputs and parallel outputs are multiplexed to minimize pin count. State changes are initiated by the rising edge of the clock. Four synchronous modes of operation are possible: hold (store), shift right with serial entry, shift right with sign extend and parallel load, and an asynchronous Master Reset (MR) input overrides clocked operation and clears the register.
This document is a technical datasheet for the National Semiconductor 54F/74F322, an 8-bit shift register designed for either serial or parallel loading. The device features TRISTATE parallel output buffers to minimize pin count and includes four synchronous modes of operation: hold (store), shift right with serial entry, shift right with sign extend, and parallel load.
The datasheet provides comprehensive electrical characteristics, including DC and AC parameters for commercial and military grade devices. It details absolute maximum ratings, logic symbols, connection diagrams for various package types (DIP, SOIC, Flatpak, LCC), and physical dimensions.
| Device Type | Octal Serial/Parallel Register with Sign Extend |
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The four modes are hold (store), shift right with serial entry, shift right with sign extend, and parallel load.