7403 Quad 2-Input NAND Gate Logic IC – Open Collector DIP-14

The 7403 is a digital logic integrated circuit that contains four independent 2-input NAND gates with open-collector outputs in a single package. Unlike the standard 7400, the 7403 requires external pull-up resistors, allowing flexible interfacing with higher-voltage systems and wired-AND configurations. Operating from a 5V supply, it is compatible with standard TTL logic levels and is commonly used for logic control, signal gating, level shifting, and driving external loads such as LEDs and relays.

• Quad 2-input NAND gate configuration
• Open-collector outputs for flexible interfacing
• Supports wired-AND logic functions
• Standard TTL logic compatibility
• Single 5V supply operation
• External pull-up resistor compatibility
• Can interface with higher-voltage circuits
• Suitable for driving LEDs and relays
• DIP-14 through-hole package
• Breadboard friendly design
• Reliable TTL switching performance
• Useful for logic expansion applications
• Supports custom output voltage levels
• Ideal for educational and industrial digital systems

• Model: 7403
• Device Type: Quad 2-Input NAND Gate IC
• Output Type: Open-Collector
• Logic Family: TTL
• Number of Gates: 4
• Inputs per Gate: 2
• Supply Voltage: 5V
• Input Logic Levels: TTL Compatible
• Propagation Delay (Typical): 15ns
• Maximum Output Sink Current: 16mA
• Package Type: 14-Pin DIP
• Mounting Type: Through-Hole
• Operating Temperature Range: 0°C to +70°C
• Application Type: Digital Logic and Level Interfacing

• 3D Model
• Datasheet

•  7403 74LS03 Quad NAND