TL431CDM

Overview

The TL431CDM is a precision programmable shunt voltage reference manufactured by Microsemi Corporation. It operates within an ambient temperature range of 0°C to 70°C and features an initial voltage reference accuracy of 2%. The device provides an adjustable output voltage from 2.5V to 36V using two external resistors. It supports a sink current capability ranging from 1mA to 100mA, with a typical output dynamic impedance of less than 200mΩ. The component is housed in an 8-pin Plastic SOIC surface-mount package.

Feature Summary

• Offers low output noise for improved signal integrity
• Provides direct pin-to-pin replacement for industry standard TL431 and TL1431 devices
• Features low output impedance for enhanced load regulation

Applications

• Feedback path of switching power supplies
• Overvoltage protection (OVP) crowbar circuits
• Reference source for A/D and D/A converters

Procurement Notes

Verify the obsolete status of this part number before procurement. Confirm that the manufacturer no longer recommends it for new designs. Ensure existing inventory or surplus sources are reliable. Check for RoHS compliance transition data if required for specific manufacturing standards. Validate the 8-pin SOIC package availability against current supply chain constraints.

Selection Notes

Select this component when a 2% accuracy tolerance is sufficient for the application. Consider the 0°C to 70°C operating temperature range limits. Evaluate the 8-pin SOIC package dimensions for PCB layout compatibility. Assess the need for low output noise characteristics in the circuit design. Verify that the 1mA to 100mA sink current meets the load requirements.

Part Context

This device belongs to the TL431 series of precision programmable references. It shares functional similarities with other three-terminal shunt regulators but offers specific accuracy and thermal performance characteristics defined by the 'C' suffix. The Microsemi Integrated Products Division produced this component as part of their legacy analog portfolio.

Replacement Considerations

The datasheet specifies direct pin-to-pin replacement for the industry standard TL431 and TL1431. Verify electrical parameter compatibility with these equivalents before substitution.