TS431IYLT Replacement: TLV431ACDBVT, TLV431CDBVT

Original Part

TS431IYLT

STMicroelectronics

Shunt Voltage Reference IC Adjustable 1.24V 6 VV ±2% 30 mA SOT-23-5

Alternative Part

TLV431ACDBVT

Texas Instruments

Shunt Voltage Reference IC Adjustable 1.24V 6 VV ±1% 15 mA SOT-23-5

TLV431CDBVT

Texas Instruments

Shunt Voltage Reference IC Adjustable 1.24V 6 VV ±1.5% 15 mA SOT-23-5

1. TLV431ACDBVT Substitution Conclusion The TLV431ACDBVT is compatible as a substitute in terms of its basic functionality (adjustable shunt reference, output voltage range) and physical package. However, key differences significantly limit its viability as a drop-in replacement. The primary limitations are: its output current capability is only 15mA (compared to 30mA for the Original Part). If the original circuit operates near 30mA, substitution will lead to unstable or failed reference voltage regulation. Furthermore, it lacks a specified temperature coefficient (the Original Part is 100ppm/°C), introducing uncertainty in stability across wide temperature ranges. It also does not carry AEC-Q100 automotive-grade qualification, precluding its use in automotive electronics or other high-reliability applications. Substitution can only be considered for general industrial or consumer applications where the operating current is confirmed to be well below 15mA, and where stringent requirements for temperature stability and qualification grade are not present.

2. TLV431CDBVT Substitution Conclusion The substitution feasibility conclusion for the TLV431CDBVT is similar to that of the TLV431ACDBVT, with the added consideration of accuracy differences. It shares the same fundamental limitation of a halved output current capability (15mA), as well as the lack of automotive-grade qualification and a specified temperature coefficient. Additionally, its initial accuracy is ±1.5%, which is superior to the Original Part's ±2%. However, given the critical bottleneck of current capability, this accuracy advantage is not a primary deciding factor. Identical to the ACDBVT variant, its substitution is only suitable for applications with low operating current (significantly below 15mA), non-automotive requirements, and non-critical temperature coefficient needs. As its accuracy still meets requirements, it can be considered a potential substitute option under these constrained conditions.

Analysis ID: DD36-0121000

Based on part parameters and for reference only. Not to be used for procurement or production.