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HD74HC677

Hitachi Semiconductor
Part Number HD74HC677
Manufacturer Hitachi Semiconductor
Description 16-bit Address Comparator
Published Mar 23, 2005
Detailed Description HD74HC677 16-bit Address Comparator Description The HD74HC677 address comparator simplifies addressing of memory boards...
Datasheet PDF File HD74HC677 PDF File

HD74HC677
HD74HC677

Overview
HD74HC677 16-bit Address Comparator Description The HD74HC677 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 infomation applied to the 16 A inputs must be low or high to cause a low state at the output (Y).
For example, a positive-logic bit combination of 0111 (decimal 7) at the P input determines that inputs A1 through A7 must be low and that inputs A8 through A16 must be high to cause the output to go low.
Equality of the address applied at the A inputs to the preprogrammed address is indicated by the output being low.
The HD74HC677 ...


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