TL431CDR

Overview

The TL431CDR is an adjustable precision shunt voltage reference manufactured by Texas Instruments. It operates within a cathode voltage range of 2.5V to 36V and provides an initial accuracy of ±2.2%. The device features a temperature coefficient of 92 ppm/°C and supports a maximum cathode current of 100mA. Designed for surface-mount applications, it is housed in an 8-pin SOIC package. The component functions reliably across an operating temperature range from 0°C to +70°C.

Feature Summary

• Provides programmable output voltage capability via external resistor network
• Delivers high stability with low temperature drift characteristics
• Supports direct replacement for Zener diodes in regulation circuits

Applications

• Precision power supply regulation
• Voltage monitoring circuits
• Portable equipment power management

Procurement Notes

Verify the specific suffix 'J' or absence thereof against official datasheets, as variants may differ in accuracy or packaging. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Ensure the ordering part number matches the required tolerance and thermal specifications for the target application environment.

Selection Notes

Select this component when a stable, adjustable reference voltage is required in space-constrained designs. The SOIC-8 package facilitates automated surface-mount assembly. Consider the ±2.2% initial accuracy and 92 ppm/°C temperature coefficient for circuit precision requirements. Verify that the 100mA cathode current rating meets the load demands of the shunt regulator topology.

Part Context

This device belongs to the TL431 family of programmable shunt regulators. It serves as a versatile alternative to traditional Zener diodes, offering superior performance in terms of adjustability and thermal stability. The component is widely utilized in power management integrated circuits and general-purpose analog signal conditioning applications requiring precise voltage referencing.

Replacement Considerations

Compatible substitutes include LM431BCMX/NOPB and TL431IDT. Verify pinout compatibility and electrical parameter alignment before substitution.