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HD74HC643 - Octal Bus Transceivers

Download the HD74HC643 datasheet PDF. This datasheet also covers the HD74HC640 variant, as both devices belong to the same octal bus transceivers family and are provided as variant models within a single manufacturer datasheet.

Description

Each device has an active enable G and a direction control input, DIR.

When DIR is high, data flows from the A inputs to the B outputs.

When DIR is low, data flows from the B inputs to the A outputs.

Features

  • High Speed Operation: tpd = 12 ns typ (CL = 50 pF).
  • High Output Current: Fanout of 15 LSTTL Loads.
  • Wide Operating Voltage: VCC = 2 to 6 V.
  • Low Input Current: 1 µA max.
  • Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C).
  • Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation HD74HC640P DILP-20 pin PRDP0020AC-B (DP-20NEV) P HD74HC640FPEL SOP-20 pin (JEITA) PRSP0020DD-B (FP-20D.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (HD74HC640-Renesas.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number HD74HC643
Manufacturer Renesas
File Size 131.68 KB
Description Octal Bus Transceivers
Datasheet download datasheet HD74HC643 Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
HD74HC643 Octal Bus Transceivers Hitachi Semiconductor
HD74HC640 Octal Bus Transceivers Hitachi Semiconductor
HD74HC646 Octal Bus Transceivers/Registers Hitachi Semiconductor
HD74HC648 Octal Bus Transceivers/Registers Hitachi Semiconductor
HD74HC620 Octal Bus Transceivers Hitachi Semiconductor

Other Datasheets by Renesas

Part Number Description
HD74HC640 Octal Bus Transceivers
HD74HC620 Octal Bus Transceivers
HD74HC623 Octal Bus Transceivers
HD74HC668 Synchronous UP/Down Decade Counter
HD74HC669 Synchronous Up/Down 4-bit binary Counter

Full PDF Text Transcription

Click to expand full text
HD74HC640, HD74HC643 Octal Bus Transceivers (with 3-state outputs) REJ03D0637-0200 (Previous ADE-205-517) Rev.2.00 Mar 30, 2006 Description Each device has an active enable G and a direction control input, DIR. When DIR is high, data flows from the A inputs to the B outputs. When DIR is low, data flows from the B inputs to the A outputs. The HD74HC640 transfers inverted data from one bus to other and the HD74HC643 transfers inverted data from the A bus to the B bus and true data from the B bus to the A bus.
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