SN74LS02N Quad 2 input Nor Gate 74LS series

The SN74LS02N is a quad 2-input NOR gate IC from the 74LS series, designed for general-purpose digital logic applications. It is housed in a DIP-14 package, making it suitable for through-hole PCB designs and breadboard prototyping. Each of the four gates performs the NOR operation, outputting a high signal only when both inputs are low, making this IC a standard choice for digital logic circuits.

Key Specifications for SN74LS02N

General Specifications

1. Logic Type: Quad 2-input NOR gate
2. Package: DIP-14 (Dual Inline Package with 14 pins)
3. Number of Gates: 4 independent NOR gates
4. Input/Output: Each gate has 2 inputs and 1 output

Electrical Characteristics

1. Supply Voltage (V_CC): 4.75 V to 5.25 V (typically 5 V)
2. High-Level Output Voltage (V_OH): Minimum 2.7 V at standard load (with 5 V supply)
3. Low-Level Output Voltage (V_OL): Maximum 0.4 V at standard load
4. Input Load Current (I_IL): -0.4 mA (max), indicating low current requirements for inputs
5. Output Sink Current (I_OL): Up to 8 mA (standard for LS series)

Performance Characteristics

1. Propagation Delay: ~10 ns (typical), which makes it suitable for moderate-speed applications
2. Power Dissipation: Typically low due to TTL technology, but draws around 2 mA per gate when active
3. Temperature Range: 0°C to +70°C (operating)

Pin Configuration

1. V_CC (Power): Pin 14
2. GND: Pin 7
3. Inputs/Outputs: Each NOR gate has two inputs (A, B) and one output (Y)
4. Gate 1: Pins 1, 2 (Inputs) and 3 (Output)
5. Gate 2: Pins 4, 5 (Inputs) and 6 (Output)
6. Gate 3: Pins 8, 9 (Inputs) and 10 (Output)
7. Gate 4: Pins 11, 12 (Inputs) and 13 (Output)

Applications

1. Digital Logic Circuits: Widely used in combinational and sequential circuits
2. Signal Inversion and Control Logic: Essential for circuits where NOR-based logic is required
3. Digital Comparators and Data Processing: Common in applications needing low-power, basic TTL logic

The SN74LS02N is a robust and reliable choice for general-purpose digital circuits, offering basic NOR gate functionality with low power consumption and ease of integration into various standard logic designs.