TLV431ACDBVRE4 Equivalent & Substitute Parts

Part Overview

The TLV431ACDBVRE4 is a shunt voltage reference IC with adjustable output from Texas Instruments, designed for precision voltage regulation applications. This component features a 1.24V to 6V adjustable output with ±1% tolerance and 15mA output current capability in a compact SOT-23-5 surface mount package. The part is currently classified as obsolete, making identification of compatible substitutes essential for ongoing production and maintenance applications. Active alternatives with equivalent or enhanced specifications are available from both Texas Instruments and other manufacturers.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLV431ACDBVRE4
Manufacturer	Texas Instruments
Reference Type	Shunt
Output Type	Adjustable
Voltage - Output (Min/Fixed)	1.24V
Voltage - Output (Max)	6V
Current - Output	15mA
Tolerance	±1%
Current - Cathode	80µA
Operating Temperature	0°C ~ 70°C
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TLV431ACDBVRE4 is determined by the following critical parameters:

Primary Compatibility Criteria:

Reference Type: Shunt (all substitutes must maintain shunt topology)
Output Type: Adjustable (voltage reference must be adjustable)
Voltage - Output (Min/Fixed): 1.24V (minimum output voltage must match)
Voltage - Output (Max): 6V or higher (maximum output voltage must equal or exceed original)
Tolerance: ±1% or better (accuracy specification must be maintained or improved)
Package / Case: SC-74A, SOT-753 (physical footprint compatibility)
Supplier Device Package: SOT-23-5 (pin count and layout must match)
Mounting Type: Surface Mount (assembly process compatibility)

Secondary Considerations:

Current - Output: 15mA minimum (substitutes with higher current capability are acceptable)
Current - Cathode: 80µA reference (substitutes with different cathode current are acceptable if within design margins)
Operating Temperature: 0°C ~ 70°C minimum range (extended ranges are acceptable)
Product Status: Active preferred (ensures ongoing availability)

Substitutes are grouped into two categories: direct replacements from Texas Instruments maintaining identical specifications, and cross-manufacturer alternatives from STMicroelectronics and Diodes Incorporated with equivalent or enhanced electrical characteristics.

Parameter Comparison

Part Number	Manufacturer	Voltage Output (Min/Max)	Current Output	Tolerance	Cathode Current	Operating Temp	Package	Product Status
TLV431ACDBVRE4	Texas Instruments	1.24V / 6V	15mA	±1%	80µA	0°C ~ 70°C	SOT-23-5	Obsolete
TLV431ACDBVR	Texas Instruments	1.24V / 6V	15mA	±1%	80µA	0°C ~ 70°C	SOT-23-5	Active
TLV431AE5TA	Diodes Incorporated	1.24V / 18V	15mA	±1%	100µA	-40°C ~ 125°C	SOT-25	Active
TS431AILT	STMicroelectronics	1.24V / 6V	30mA	±1%	60µA	-40°C ~ 125°C	SOT-23-5	Active
TS431AIYLT	STMicroelectronics	1.24V / 6V	30mA	±1%	60µA	-40°C ~ 125°C	SOT-23-5	Active
TS431BILT	STMicroelectronics	1.24V / 6V	30mA	±0.5%	60µA	-40°C ~ 125°C	SOT-23-5	Active
TS431BIYLT	STMicroelectronics	1.24V / 6V	30mA	±0.5%	60µA	-40°C ~ 125°C	SOT-23-5	Active
TS431ILT	STMicroelectronics	1.24V / 6V	30mA	±2%	60µA	-40°C ~ 125°C	SOT-23-5	Active
TS431IYLT	STMicroelectronics	1.24V / 6V	30mA	±2%	60µA	-40°C ~ 125°C	SOT-23-5	Active

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended): TLV431ACDBVR from Texas Instruments is the primary substitute. This part maintains identical electrical specifications to the obsolete TLV431ACDBVRE4 while offering active product status with established supply chain availability. Both parts share the same 1.24V to 6V output range, ±1% tolerance, 15mA output current, and SOT-23-5 package configuration. Selection of this part eliminates any design re-qualification requirements.

Tier 2 - Enhanced Performance Alternatives: STMicroelectronics TS431 series parts (TS431AILT, TS431AIYLT, TS431BILT, TS431BIYLT, TS431ILT, TS431IYLT) provide equivalent or superior electrical performance with identical package footprints. These parts offer doubled output current capability (30mA versus 15mA), extended operating temperature range (-40°C to 125°C), and improved temperature coefficient specifications (100ppm/°C). Tolerance options range from ±0.5% to ±2%, allowing selection based on accuracy requirements. The TS431AIYLT and TS431BIYLT variants include AEC-Q100 automotive qualification for applications requiring automotive-grade components.

Tier 3 - Extended Voltage Range Alternative: Diodes Incorporated TLV431AE5TA offers extended maximum output voltage (18V versus 6V) with identical minimum output voltage and tolerance specifications. This part uses SOT-25 packaging, which differs from the original SOT-23-5 footprint and requires PCB layout modification. Extended operating temperature range (-40°C to 125°C) and higher cathode current (100µA) are provided. Selection of this part is appropriate only when higher output voltage capability is required and PCB redesign is feasible.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory standing. Parts designated with automotive qualification (TS431AIYLT, TS431BIYLT) carry AEC-Q100 certification for applications requiring automotive-grade component traceability.

Frequently Asked Questions (FAQ)

Q: Can I use TS431AILT as a direct replacement for TLV431ACDBVRE4? A: Yes. The TS431AILT maintains the same 1.24V to 6V output range, ±1% tolerance, and SOT-23-5 package. The part offers enhanced specifications including doubled output current (30mA), extended temperature range (-40°C to 125°C), and active product status. No design changes are required for pin-compatible substitution.

Q: What is the difference between TS431AILT and TS431BILT? A: Both parts share identical electrical specifications except for tolerance: TS431AILT provides ±1% tolerance while TS431BILT provides ±0.5% tolerance. Selection depends on accuracy requirements for the application. Both use SOT-23-5 packaging and offer 30mA output current.

Q: Why does TLV431AE5TA use SOT-25 packaging instead of SOT-23-5? A: The TLV431AE5TA from Diodes Incorporated is manufactured in SOT-25 package configuration. While this part offers extended voltage output capability (18V maximum), the different package requires PCB footprint modification and is not a direct pin-compatible replacement. Selection of this part is appropriate only when higher output voltage is required and PCB redesign is feasible.

Q: Are automotive-qualified versions available? A: Yes. STMicroelectronics offers TS431AIYLT and TS431BIYLT with AEC-Q100 automotive qualification. These parts maintain identical electrical specifications to their non-automotive counterparts (TS431AILT and TS431BILT respectively) while providing automotive-grade component traceability and qualification documentation.

Q: What is the significance of the "Y" designation in part numbers like TS431AIYLT? A: The "Y" designation indicates automotive-grade qualification (AEC-Q100) for STMicroelectronics TS431 series parts. Parts with "Y" designation (TS431AIYLT, TS431BIYLT, TS431IYLT) are qualified for automotive applications, while equivalent parts without "Y" (TS431AILT, TS431BILT, TS431ILT) are industrial-grade. Electrical specifications remain identical between automotive and industrial variants.

Q: Can I substitute a ±2% tolerance part (TS431ILT) for the original ±1% part? A: Substitution is possible only if the application design tolerates the reduced accuracy specification. The TS431ILT provides ±2% tolerance compared to the original ±1%. If the circuit design requires ±1% or better accuracy, TS431ILT is not suitable. TS431AILT or TS431BILT should be selected instead.

Q: What is the impact of different cathode current specifications? A: The original TLV431ACDBVRE4 specifies 80µA cathode current, while STMicroelectronics TS431 series parts specify 60µA. This difference is acceptable in most applications as cathode current represents the minimum operating current through the reference element. Lower cathode current (60µA) may reduce power consumption in some circuit topologies. Diodes Incorporated TLV431AE5TA specifies 100µA cathode current, which is also acceptable for standard applications.

Q: Is the extended temperature range of TS431 parts beneficial for my application? A: Extended operating temperature range (-40°C to 125°C for TS431 series versus 0°C to 70°C for the original) provides improved performance stability across wider environmental conditions. If your application operates within the original 0°C to 70°C range, both specifications are equivalent. Extended range is beneficial for industrial, automotive, or outdoor applications experiencing wider temperature variations.

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