HD74HC648 - Octal Bus Transceivers/Registers

Hitachi Semiconductor (now Renesas)

Datasheet Details

Part number	HD74HC648
Manufacturer	Hitachi Semiconductor (now Renesas)
File Size	61.86 KB
Description	Octal Bus Transceivers/Registers
Datasheet	HD74HC648 Datasheet

Six control inputs enable this device to be used as a latched transceiver, unlatched transceiver or a combination of both.

As a latched transceiver, data from one bus is stored for later retrieval by the other bus.

HD74HC646/HD74HC648 Octal Bus Transceivers/Registers with Multiplexed 3-state.

High Speed Operation: tpd (Bus to Bus) = 14 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) HD74HC646/HD74HC648 Function Table Inputs Control G H H L L L L L L Clock Select Data I/O Data I/O Operation or Function HD74HC648 Isolation Store A & B data B real-time data to A bus B stored data to A bus.

Part Number	Description
HD74HC640	Octal Bus Transceivers
HD74HC643	Octal Bus Transceivers
HD74HC646	Octal Bus Transceivers/Registers
HD74HC620	Octal Bus Transceivers
HD74HC623	Octal Bus Transceivers
HD74HC651	Octal Bus Transceivers/Registers
HD74HC652	Octal Bus Transceivers/Registers
HD74HC668	Synchronous UP/Down Decade/4-bit binary Counter
HD74HC669	Synchronous UP/Down Decade/4-bit binary Counter
HD74HC670	4-by-4 Register