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74643 - True-Inverting Octal TRI-STATE Transceiver

Download the 74643 datasheet PDF. This datasheet also covers the 74640 variant, as both devices belong to the same true-inverting octal tri-state transceiver family and are provided as variant models within a single manufacturer datasheet.

General Description

These TRI-STATE bi-directional transceivers utilize advanced silicon-gate CMOS technology and are intended for two-way asynchronous communication between data buses They have high drive current outputs which enable high speed operation even when driving large bus capacitances These circuits possess

Key Features

  • Y TTL input compatible Y Octal TRI-STATE outputs for mP bus.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (74640-NationalSemiconductor.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
7464 DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SRS SURROUND SOUND AND VOICE CANCELLER STMicroelectronics
74645 Octal Bus Transceiver Fairchild Semiconductor
74670 3-STATE 4-by-4 Register File Fairchild Semiconductor

Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
74640 Inverting Octal TRI-STATE Transceiver
74670 4-BY-4 REGISTER FILES
74688 8-Bit Magnitude Comparator

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
MM54HCT640 MM74HCT640 Inverting Octal TRI-STATE Transceiver MM54HCT643 MM74HCT643 True-Inverting Octal TRI-STATE Transceiver February 1988 MM54HCT640 MM74HCT640 Inverting Octal TRI-STATE Transceiver MM54HCT643 MM74HCT643 True-Inverting Octal TRI-STATE Transceiver General Description These TRI-STATE bi-directional transceivers utilize advanced silicon-gate CMOS technology and are intended for two-way asynchronous communication between data buses They have high drive current outputs which enable high speed operation even when driving large bus capacitances These circuits possess the low power consumption of CMOS circuitry yet have speeds comparable to low power Schottky TTL circuits All devices are TTL input compatible and can drive up to 15 LS-TTL loads and all inputs are protected from