Fairchild 74HC series, MM74HC02J, Logic Type NOR Gate, 4 Circuits, 2 Inputs, 2V ~ 6V Supply, -40°C ~ 85°C, Through Hole, 14-CDIP (0.300", 7.62mm).
| Parameter | Value |
|---|---|
| Series | 74HC |
| Logic type | NOR Gate |
| Mounting | Through Hole |
| Supply voltage | 2V ~ 6V |
| Current - quiescent | 2 µA |
| Current - output high, low | 5.2mA, 5.2mA |
| I/O channels | 2 |
| Operating temperature | -40°C ~ 85°C |
| Package | Bulk |
| Case | 14-CDIP (0.300\", 7.62mm) |
| Number of circuits | 4 |
| Input logic level - low | 0.5V ~ 1.8V |
| Input logic level - high | 1.5V ~ 4.2V |
| Max propagation delay @ v, max CL | 15ns @ 6V, 50pF |
The Fairchild MM74HC02J is a 74HC-series quad 2-input NOR gate in a 14-lead ceramic DIP. It integrates four independent NOR gates, each with two inputs. Supply range runs from 2 V to 6 V. Quiescent current is 2 µA maximum.
The 15 ns propagation delay at 6 V and 50 pF load is typical for 74HC at this supply. The 5.2 mA output drive is symmetric high and low. Input logic thresholds are CMOS-compatible: low at 0.5 V to 1.8 V, high at 1.5 V to 4.2 V.
The MM74HC02J follows the standard 14-pin DIP pinout for a quad 2-input NOR gate: pin 7 is GND, pin 14 is VCC. Each of the four gates has its inputs on pins 1-2, 4-5, 9-10, and 12-13, with outputs on pins 3, 6, 8, and 11 respectively. The datasheet PDF provides the full pin diagram.
The SN74HC21N from TI is a quad 2-input AND gate in the same 14-DIP footprint and 74HC family, but the logic function is AND, not NOR. For a direct NOR replacement, the MM74HC02J itself is the active part; no pin-compatible NOR substitute from another manufacturer is listed in the cross-reference data.