This document describes the product specifications of Philips Semiconductors' 74F821/822/823/824/825/826 Bus Interface Registers. The series of registers feature high-speed parallel registers, high-performance bus interface buffering, and high-impedance PNP base inputs. They are ideal for high-speed, light loading, or increased fan-in applications with MOS microprocessors.
The Philips 74F821‑826 series are high‑speed parallel bus interface registers offering 8‑, 9‑ or 10‑bit widths with non‑inverting or inverting 3‑state outputs. They provide low loading PNP base inputs, buffered control inputs, and are compatible with AMD AM29821‑29826 series packages.
The datasheet lists electrical characteristics such as output sink/source currents, input loading, temperature ranges, and package details, together with pin‑out diagrams, logic symbols, function tables and ordering numbers for both commercial and industrial ranges.
| Output sink current (typical) | 64 mA |
|---|---|
| Output source current (typical) | 24 mA |
| Package type | 24‑pin plastic slim DIP (300 mil) |
| Data input load (high/low) | 20 µA / 0.6 mA |
| Clock input load (high/low) | 20 µA / 0.6 mA |
| Data output load (high/low) | 24 mA / 64 mA |
The 74F822 is the inverted‑output version of the 74F821.
They are offered in a 24‑pin plastic slim DIP (300 mil) package.
Typical output sink current is 64 mA and source current is 24 mA.