HD74HC678 - 16-bit Address Comparator

Hitachi Semiconductor (now Renesas)

Datasheet Details

Part number	HD74HC678
Manufacturer	Hitachi Semiconductor (now Renesas)
File Size	50.95 KB
Description	16-bit Address Comparator
Datasheet	HD74HC678 Datasheet

The HD74HC678 address comparator simplifies addressing of memory boards and/or other peripheral devices.

The four P inputs are normally hard wired with a preprogrammed address.

An internal decoder determines what input information applied to the 16 A inputs must be low or high to cause a low state at the output (Y).

HD74HC678 16-bit Address Comparator.

a transparent latch and a latch enabled input (C). When C is high, the device is in the transparent mode. When C is low, the previous logic state of Y is latched. Features.
High Speed Operation High Output Current: Fanout of 10 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) HD74HC678 Function Table Inputs C H H H H H H H H H H H H H H H H H L P3 P2.

Part Number	Description
HD74HC670	4-by-4 Register
HD74HC673	16-bit Shift Register
HD74HC674	16-bit Shift Register
HD74HC677	16-bit Address Comparator
HD74HC679	12-bit Address Comparator
HD74HC620	Octal Bus Transceivers
HD74HC623	Octal Bus Transceivers
HD74HC640	Octal Bus Transceivers
HD74HC643	Octal Bus Transceivers
HD74HC646	Octal Bus Transceivers/Registers