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The HD74HC679 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 12 A inputs must be low or high to cause a low state at the output (Y). For example, a positive-logic bit combinat.
and enable input (G). When G is low, the device is enabled. When G is high, the device is disabled and the output is high regardless of the A and P inputs.
Features
• High Speed Operation: tpd (A to Y) = 18 ns typ (CL = 50 p.
HD74HC679 - Hitachi Semiconductor
The HD74HC679 address comparator simplifies addressing of memory boards and/or other peripheral devices. The four P inpu.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | HD74HC670 |
Hitachi Semiconductor |
4-by-4 Register |
|
| 2 | HD74HC670 |
Renesas |
4-by-4 Register File |
|
| 3 | HD74HC673 |
Hitachi Semiconductor |
16-bit Shift Register |
|
| 4 | HD74HC674 |
Hitachi Semiconductor |
16-bit Shift Register |
|
| 5 | HD74HC677 |
Hitachi Semiconductor |
16-bit Address Comparator |
|
| 6 | HD74HC678 |
Hitachi Semiconductor |
16-bit Address Comparator |
|
| 7 | HD74HC620 |
Hitachi Semiconductor |
Octal Bus Transceivers |
|
| 8 | HD74HC620 |
Renesas |
Octal Bus Transceivers |
|
| 9 | HD74HC623 |
Hitachi Semiconductor |
Octal Bus Transceivers |
|
| 10 | HD74HC623 |
Renesas |
Octal Bus Transceivers |
|
| 11 | HD74HC640 |
Hitachi Semiconductor |
Octal Bus Transceivers |
|
| 12 | HD74HC640 |
Renesas |
Octal Bus Transceivers |
|