TLV431ACDBVRG4 Equivalent & Substitute Parts

Part Overview

The TLV431ACDBVRG4 is a shunt voltage reference IC with adjustable output from Texas Instruments, designed for precision voltage regulation applications. This part operates with a fixed output voltage of 1.24V to 6V, ±1% tolerance, and 15mA output current in a SOT-23-5 surface mount package. The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLV431ACDBVRG4
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 for the TLV431ACDBVRG4 is determined by the following critical parameters:

Reference Type: Shunt voltage reference
Output Type: Adjustable
Voltage Range: 1.24V minimum to 6V maximum output
Output Current: Minimum 15mA capability
Tolerance: ±1% or better
Package: SOT-23-5 surface mount
Operating Temperature: Extended range preferred for industrial applications

Substitute parts are grouped into two categories:

Category 1: Direct Texas Instruments Equivalents – Same manufacturer, identical electrical specifications, different packaging format (Cut Tape vs. Tape & Reel).

Category 2: Cross-Manufacturer Alternatives – STMicroelectronics and Diodes Incorporated parts meeting or exceeding the electrical requirements. These parts maintain the same reference type, output voltage range, and package form factor while offering enhanced specifications such as higher output current (30mA), improved tolerance (±0.5%), or extended temperature ranges (-40°C to 125°C).

Parameter Comparison

Part Number	Manufacturer	Output Voltage (Min/Max)	Output Current	Tolerance	Cathode Current	Operating Temperature	Package	Product Status
TLV431ACDBVRG4	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

Primary Recommendation: TLV431ACDBVR

The TLV431ACDBVR from Texas Instruments is the direct active equivalent to the obsolete TLV431ACDBVRG4. It maintains identical electrical specifications (1.24V to 6V output, 15mA current, ±1% tolerance) and package format (SOT-23-5). The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). This part is currently in active production status with 137,300 units in stock, ensuring supply continuity. Both parts are ROHS3 compliant and carry identical compliance certifications.

Secondary Recommendations: STMicroelectronics TS431 Series

The TS431AILT, TS431AIYLT, TS431BILT, TS431BIYLT, TS431ILT, and TS431IYLT from STMicroelectronics are functionally compatible alternatives. These parts offer enhanced specifications including doubled output current (30mA versus 15mA), extended operating temperature range (-40°C to 125°C versus 0°C to 70°C), and improved tolerance options (±0.5% and ±1% available). The TS431AIYLT and TS431BIYLT variants include AEC-Q100 automotive qualification. All maintain the SOT-23-5 package and 1.24V to 6V output voltage range. These parts are suitable for applications requiring higher current delivery or wider temperature operation.

Alternative: TLV431AE5TA (Diodes Incorporated)

The TLV431AE5TA from Diodes Incorporated provides an alternative with extended maximum output voltage (18V versus 6V) and wider operating temperature range (-40°C to 125°C). However, this part uses a SOT-25 package rather than SOT-23-5, requiring PCB layout modification. This option is appropriate only when the higher voltage capability is required and package change is feasible.

Frequently Asked Questions (FAQ)

Q: Can I directly replace TLV431ACDBVRG4 with TLV431ACDBVR?

A: Yes. Both parts are from Texas Instruments with identical electrical specifications and SOT-23-5 packaging. The only difference is the packaging format (Tape & Reel versus Cut Tape & Digi-Reel). No circuit modifications are required.

Q: What are the key differences between TLV431ACDBVR and TS431AILT?

A: Both maintain the same 1.24V to 6V output voltage range and ±1% tolerance. The TS431AILT offers doubled output current (30mA versus 15mA), extended temperature range (-40°C to 125°C versus 0°C to 70°C), and lower cathode current (60µA versus 80µA). The TS431AILT is suitable for applications requiring higher current delivery or industrial temperature ranges.

Q: Why does TS431AIYLT have "Y" in the part number?

A: The "Y" designation indicates AEC-Q100 automotive qualification. The TS431AIYLT and TS431BIYLT variants are qualified for automotive applications and extended temperature operation. Electrical specifications remain identical to their non-automotive counterparts (TS431AILT and TS431BILT).

Q: Can I use TS431BILT instead of TS431AILT?

A: Yes, with improved specifications. The TS431BILT offers tighter tolerance (±0.5% versus ±1%) while maintaining all other parameters including 30mA output current and -40°C to 125°C operating range. This substitution improves voltage accuracy without circuit modification.

Q: Is the TLV431AE5TA a direct replacement?

A: No. While functionally similar, the TLV431AE5TA uses a SOT-25 package instead of SOT-23-5, requiring PCB layout changes. Additionally, it specifies 18V maximum output voltage versus 6V. Use this part only when higher voltage capability is required and package modification is acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (TLV431ACDBVR, TS431 series, and TLV431AE5TA) are ROHS3 compliant with identical environmental compliance status to the original TLV431ACDBVRG4.

Q: Which substitute offers the best tolerance?

A: The TS431BILT and TS431BIYLT offer the tightest tolerance at ±0.5%, compared to ±1% for the original part and most alternatives. These parts are suitable for precision voltage reference applications requiring enhanced accuracy.

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