CD4078 8-Input NOR Gate

The CD4078 is an 8-input NOR gate from the 40xx series CMOS logic family. This device implements a single NOR function with eight inputs, producing a high output only when all eight inputs are low. The CD4078 is a specialized logic gate used in applications requiring wide multi-input NOR operations, such as parity checking and detection of all-zero conditions.

This 8-input NOR gate is an ideal building block for zero-detection logic, busy detection, and other combinational functions where an output needs to assert when a number of input signals are all inactive. The standard CMOS characteristics ensure compatibility with a wide range of supply voltages and load conditions.

Features:

1. Single 8-input NOR gate
2. Function: Y = NOT(A+B+C+D+E+F+G+H)
3. High output only when all inputs are low
4. Wide operating voltage: 3V to 15V DC
5. Standard 14-pin DIP package
6. Low power consumption: 10µA at 5V
7. High noise immunity: 45% of VDD typical
8. Compatible with 40xx and 74HC families