7400 (Integrated circuit)
 7400 Integrated circuit diagram | |
| Pin configuration | 14 Standard, 8 and 20-pin variants |
|---|---|
| NAND gate truth table | ||
|---|---|---|
| Input | Output | |
| A | B | A NAND B |
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
The 7400 Integrated circuit is a TTL Quad 2-Input NAND gate, complementing the CMOS equivalent, the 4011.
These devices contain four independent 2-input NAND gates. They perform the Boolean function in positive logic.
Pin functions
| Pin | I/O | Description | ||||
|---|---|---|---|---|---|---|
| Name | Package | |||||
| CDIP, PDIP, SOIC, SO, SSOP, CFP | SO (SN74xx00) | CFP (SN5400) | LCCC | |||
| 1A | 1 | 1 | 1 | 2 | I | Gate 1 input |
| 1B | 2 | 2 | 2 | 3 | I | Gate 1 input |
| 1Y | 3 | 3 | 3 | 4 | O | Gate 1 output |
| 2A | 4 | 6 | 6 | 6 | I | Gate 2 input |
| 2B | 5 | 7 | 7 | 8 | I | Gate 2 input |
| 2Y | 6 | 5 | 5 | 9 | O | Gate 2 output |
| 3A | 10 | — | 9 | 13 | I | Gate 3 input |
| 3B | 9 | — | 10 | 14 | I | Gate 3 input |
| 3Y | 8 | — | 8 | 12 | O | Gate 3 output |
| 4A | 13 | — | 12 | 18 | I | Gate 4 input |
| 4B | 12 | — | 13 | 19 | I | Gate 4 input |
| 4Y | 11 | — | 14 | 16 | O | Gate 4 output |
| GND | 7 | 4 | 11 | 10 | — | Ground |
| NC | — | — | — | 1, 5, 7, 11, 15, 17 | — | No connect |
| VCC | 14 | 8 | 4 | 20 | — | Power supply |