This document describes the features and characteristics of the 74F647 and 74F649 octal transceivers/registers, including high impedance inputs, independent registers, multiplexed real-time and stored data, choice of non-inverting and inverting data paths, and open-collector outputs.
This document provides product specifications for the Philips 74F647 (non-inverting) and 74F649 (inverting) Octal Transceiver/Register ICs. These devices feature open-collector outputs, high-impedance NPN base inputs to reduce loading, and independent registers for A and B buses.
The datasheet details the logic functions, including real-time bus transfer and stored data transmission between buses A and B. It includes pin configurations, logic symbols, electrical characteristics (DC and AC), absolute maximum ratings, recommended operating conditions, and test circuit definitions.
| Maximum clock frequency (fmax) | 65 MHz |
|---|---|
| Supply current (total) | 125 mA |
| Operating free-air temperature range | 0 to +70 °C |
| Package type | 24-pin plastic Slim Dip package |
| Output type | Open Collector |
The 74F647 is a non-inverting transceiver/register, while the 74F649 is an inverting transceiver/register.
The recommended operating supply voltage is 5.0V.