Hitachi HD74HC678
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. 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.| Part No. | HD74HC678 |
|---|---|
| Datasheet | HD74HC678 Download |
| Manufacturer |  Hitachi |
| Description | 16-bit Address Comparator |
| Buy | Stock & Price |
DESCRIPTION
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). Equality of the address applied at the A inputs to the preprogrammed address is indicated by the output being low. The HD74HC678 features 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
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● 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 P1 P0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 Output Y L L L L L L L L H H H H H H H H L L L L H H H H L L L L H H H H L L H H L L H H L L H H L L H H L H L H L H L H L H L H L H L H H L L L L L L L L L L L L L L L H H L L L L L L L L L...
