AED 5.25
1
Description
The Dual 2-input NAND gate of the Logic Gate NOR 74HC02 is a CMOS IC. It features a 14-pin package with 4 separate NOR gates inside of it. The maximum voltage for the IC power source has been set at 6V. The output of an inclusive NOR (Not-OR) gate is typically at logic level 1, and it only switches to logic level 0 when ALL of its inputs are at logic level 1.
we can define the operation of a 2-input digital logic NOR gate as being:
“If both A and B are NOT true, then Q is true”
Specifications:
- Logic Type: NOR
- Output Current: 5.2mA
- No. of Inputs per gate: 2
- Supply Voltage Min: 2V
- Supply Voltage Max: 6V
- Logic Case Style: DIP
- No. of Pins: 14
Pinout of the IC:
| Pin Name | Pin # | Type | Description |
|---|---|---|---|
| VDD | 14 | Power | Supply Voltage (+3 to +15V) |
| GND | 7 | Power | Ground (0V) |
| A1 to A4 | 1, 5, 8, 12 | Input | Inputs A of the four NOR gates |
| B1 to B4 | 2, 6, 9, 13 | Input | Inputs B of the four NOR gates |
| Q1 to Q4 | 3, 4, 10, 11 | Output | Outputs from the four NOR gates |
The Digital Logic “NOR” Gate 2-input NOR Gate
| Truth Table | |||
2-input NOR Gate
|
B | A | Q |
| 0 | 0 | 1 | |
| 0 | 1 | 0 | |
| 1 | 0 | 0 | |
| 1 | 1 | 0 | |
| Boolean Expression Q = A+B | Read as A OR B gives NOT Q |
||
Package Includes:
1 x 74HC02