100121FC

Overview

The 100121FC is a nine-channel inverter integrated circuit manufactured by National Semiconductor. It belongs to the 100K series logic family and is housed in a 24-pin CFlatPack package. The device operates with a supply voltage range of 4.2V to 5.7V. It features an input logic level low threshold of 1.49V and an input logic level high threshold of 0.88V. The component is designed for operation at temperatures starting from 0°C.

Feature Summary

• Contains nine independent inverter channels within a single integrated circuit
• Operates on standard 5V logic supply ranges
• Utilizes a 24-pin CFlatPack surface-mount package

Applications

• Digital signal inversion in logic circuits
• Signal conditioning for 100K series compatible systems
• General-purpose logic gate applications

Procurement Notes

Verify the manufacturer designation, as National Semiconductor assets are held by Texas Instruments. Confirm the specific suffix 'FC' corresponds to the CFlatPack package and commercial temperature grade. Ensure the part number matches the 100K series specifications rather than other variants. Cross-reference the pinout against official datasheets to prevent integration errors.

Selection Notes

Select this component when nine inverted outputs are required in a compact form factor. The 100K series offers a balance of speed and power consumption suitable for general digital logic. The CFlatPack package is appropriate for surface-mount assembly processes. Verify that the operating voltage and logic thresholds align with the system's interface requirements.

Part Context

National Semiconductor was a prominent manufacturer of analog and logic components before its acquisition by Texas Instruments. The 100K series represents a standard logic family known for reliable performance in digital applications. This specific inverter integrates multiple gates to reduce board space and simplify circuit design for manufacturers requiring multiple inversion stages.

Replacement Considerations

Check for direct equivalents from Texas Instruments under the same 100K series designation. Verify pin compatibility and electrical characteristics if considering alternative logic families. Ensure any substitute maintains the nine-channel configuration and CFlatPack footprint.