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7400 IC – Quad 2-Input NAND Gate (DIP-14)
🔲 7400 IC – Quad 2-Input NAND Gate (DIP-14)
The 7400 is a widely used TTL logic IC that contains four independent 2-input NAND gates in a single 14-pin Dual Inline Package (DIP). It is perfect for digital logic circuits, control systems, and basic electronics education.
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Logic Family | TTL (74 series) |
| Function | Quad 2-input NAND gate |
| Package Type | DIP-14 |
| Supply Voltage (Vcc) | 4.75V to 5.25V (typically 5V) |
| Propagation Delay | ~10 ns (depends on variant) |
| Input Logic Level | Low: ≤ 0.8V, High: ≥ 2V |
| Output Drive | TTL compatible (Low ≤ 0.4V, High ≥ 2.4V) |
📌 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) |
Each gate outputs LOW only if both inputs are HIGH (NAND logic: Y = NOT (A • B)).
🛠️ Applications
Digital logic design
Microcontroller interfacing
Signal control systems
DIY electronics and logic experiments
Learning and teaching digital logic
🧠 Truth Table (Per NAND Gate)
| A | B | Output Y |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |