74HC03D

Overview

The Toshiba 74HC03D is a high-speed CMOS quad 2-input NAND gate fabricated with silicon gate C2MOS technology. It features open-drain outputs utilizing high-performance MOS N-channel transistors, enabling wired-AND configurations and LED driving capabilities when paired with pull-up resistors. The device operates within a supply voltage range of 2.0 V to 6.0 V and maintains low power dissipation comparable to standard CMOS logic. It provides propagation delays as low as 5 ns at 5 V and includes input protection circuits against static discharge.

Feature Summary

• Quad 2-input NAND logic function with open-drain output structure
• High-speed operation achieving performance similar to LSTTL while maintaining low power consumption
• Wide operating voltage range supporting 2.0 V to 6.0 V supply rails
• Integrated protection circuits on all inputs for static discharge and transient voltage tolerance

Applications

• Wired-AND logic bus implementations
• LED driver circuits requiring external pull-up resistors
• General-purpose digital logic processing in consumer electronics
• Interface circuits between different logic families

Procurement Notes

Verify the specific ordering suffix matches the required package type, as the base part number may correspond to multiple packaging options. Confirm RoHS compliance status directly with the manufacturer or authorized distributor documentation prior to procurement. Ensure the component version aligns with the latest datasheet revision to guarantee accurate electrical characteristics and pinout definitions for your design integration.

Selection Notes

Select this component when an open-drain NAND gate is required for wired-AND functionality or level shifting applications. The HC series offers speed comparable to LSTTL with lower power consumption. Consider the 14-SOIC package constraints regarding thermal dissipation and board space. Verify that the load capacitance and pull-up resistor values are compatible with the specified propagation delay requirements for your target frequency.

Part Context

This component belongs to the 74HC family of high-speed CMOS logic integrated circuits manufactured by Toshiba Semiconductor and Storage. The '03' designation specifically identifies the quad 2-input NAND gate configuration with open-drain outputs. It shares pin compatibility with the standard push-pull 74HC00 but differs electrically in its output stage architecture to support active low signaling and bus sharing applications.

Replacement Considerations

The 74HC00D serves as a functional substitute if push-pull outputs are acceptable instead of open-drain. Cross-vendor equivalents such as SN74HC03N from Texas Instruments or MC74HC03ADR2G from ON Semiconductor provide identical logical functions and pinouts. Verify that replacement parts maintain the same open-drain specification if wired-AND capability is critical to the circuit design.