TL1431CZT

Overview

The TL1431CZT is an adjustable shunt voltage reference manufactured by STMicroelectronics. It provides a programmable output voltage ranging from 2.5 V to 36 V using two external resistors. The device operates with a cathode current range of 1 mA to 100 mA and features a typical dynamic impedance of 0.2 Ω. It is housed in a TO-92-3 package and supports through-hole mounting.

Feature Summary

• Adjustable output voltage capability between 2.5 V and 36 V
• Wide operating current range from 1 mA to 100 mA
• Low typical dynamic output impedance for stable regulation

Applications

• Precision voltage references in power supply circuits
• Programmable linear regulators
• Comparator reference voltage sources

Procurement Notes

Verify the specific suffix 'CZT' against the official STMicroelectronics datasheet to confirm it denotes the tape-and-reel packaging variant within the TL1431 family. Ensure the ordering code matches the required package type and temperature rating for the intended application environment before finalizing procurement.

Selection Notes

Select this component when a low-cost, through-hole adjustable shunt reference is required. The TO-92-3 package suits prototyping or applications where surface-mount space is not critical. Verify that the 1 mA minimum cathode current requirement aligns with the circuit's standby load conditions.

Part Context

The TL1431 series serves as a widely adopted standard for adjustable shunt voltage references. This part belongs to the broader TL1431 family, which includes variants with different tolerances and packages. It functions as a cost-effective alternative to fixed voltage references in feedback loops.

Replacement Considerations

Direct pin-compatible substitutes include the TL1431ACZT and other TL1431 variants from STMicroelectronics. Cross-manufacturer equivalents such as the KA431AZBU may also be considered if electrical parameters match the design requirements.