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7402 IC – Quad 2-Input NOR Gate (DIP-14)
🔲 7402 IC – Quad 2-Input NOR Gate (DIP-14)
The 7402 is a TTL logic IC that includes four independent 2-input NOR gates in a standard 14-pin DIP package. It is perfect for use in digital logic circuits, timers, control systems, and logic training applications.
⚙️ Technical Specifications
| Parameter | Value |
|---|---|
| Logic Family | TTL (74 series) |
| Function | Quad 2-input NOR gate |
| Package Type | DIP-14 |
| Supply Voltage (Vcc) | 4.75V to 5.25V (typically 5V) |
| Input Logic Level | Low ≤ 0.8V, High ≥ 2V |
| Output Logic Level | Low ≤ 0.4V, High ≥ 2.4V |
| Operating Temperature | −55°C to +125°C |
📌 Pin Configuration (DIP-14)
| Pin | Function | Pin | Function |
|---|---|---|---|
| 1 | A1 (Input) | 14 | Vcc (Power) |
| 2 | B1 (Input) | 13 | B4 (Input) |
| 3 | Y1 (Output) | 12 | A4 (Input) |
| 4 | A2 (Input) | 11 | Y4 (Output) |
| 5 | B2 (Input) | 10 | B3 (Input) |
| 6 | Y2 (Output) | 9 | A3 (Input) |
| 7 | GND (Ground) | 8 | Y3 (Output) |
🧠 Truth Table (Per NOR Gate)
| A | B | Output Y |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 0 |
Logic Rule: Y = NOT (A + B)
🛠️ Applications
Digital logic control circuits
Inhibition logic systems
Pulse generation and filtering
Educational electronics kits
Basic decision-making logic