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HD74HC651 - Octal Bus Transceivers/Registers

Datasheet Summary

Description

This device consists of bus transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers.

Enable GAB and GBA are provided to cotrol the transceiver functions.

Features

  • High Speed Operation: tpd (Bus to Bus) = 16 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) HD74HC651/HD74HC652 Function Table Real-Time Transfer Real-Time Transfer Bus B to Bus A Bus A to Bus B Storage Clock AB Select AB Enable GAB Clock BA Select BA Enable GBA X X L X L L X L H X X H X H X L Tra.

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Datasheet Details

Part number HD74HC651
Manufacturer Hitachi Semiconductor
File Size 55.45 KB
Description Octal Bus Transceivers/Registers
Datasheet download datasheet HD74HC651 Datasheet
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Full PDF Text Transcription

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HD74HC651/HD74HC652 Octal Bus Transceivers/Registers (with inverted 3-state outputs) Octal Bus Transceivers/Registers (with 3-state outputs) Description This device consists of bus transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers. Enable GAB and GBA are provided to cotrol the transceiver functions. Select AB and Select BA control pins are provided to select whether real-time or stored data is transferred. A low input level selects real-time data, and a high selects stored data. The following examples demonstrate the four fundamental bus-management functions that can be performed with the HD74HC651 and HD74HC652.
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