SN7402N

Overview

The SN7402N is a standard TTL quad 2-input NOR gate manufactured by Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and features four independent logic circuits in a 14-pin PDIP package. The device provides a low-level output current of 16 mA and a high-level output current of -400 uA, with a typical propagation delay of 11 ns. It supports through-hole mounting and functions reliably across an operating temperature range from 0°C to +70°C.

Feature Summary

• Contains four independent 2-input NOR logic gates for complex boolean operations
• Standard TTL technology ensures compatibility with conventional digital logic systems
• Robust drive capability with specified low-level output current support

Applications

• Digital logic circuit design requiring NOR functionality
• Industrial control systems utilizing standard TTL interfaces
• Educational electronics projects demonstrating basic logic gates

Procurement Notes

Verify the specific manufacturer prefix and suffix against official Texas Instruments documentation to confirm exact electrical characteristics and package variations. Ensure the component meets required RoHS compliance standards for the intended application environment. Cross-reference datasheet revisions to validate performance parameters before integration into final designs.

Selection Notes

Select this component when standard TTL NOR logic is required within a 14-pin DIP form factor. Consider the 4.75 V to 5.25 V supply constraint and industrial temperature limits during system planning. Evaluate alternative series such as LS or HC if lower power consumption or wider voltage ranges are necessary for the specific project requirements.

Part Context

This part belongs to the Texas Instruments 7400 series of standard TTL logic integrated circuits. The 7400 family is widely recognized for its reliability and extensive use in legacy and modern digital systems. The SN7402N specifically implements the NOR function, complementing other gates like NAND and AND within the same logical ecosystem.

Replacement Considerations

Equivalent parts include the SN74LS02N for lower power consumption and the SN74HC02N for CMOS compatibility. Verify pinout consistency and electrical parameter alignment when substituting these alternatives in existing designs.