TL431ACDBVRE4 Equivalent & Substitute Parts

Part Overview

The TL431ACDBVRE4 is a shunt voltage reference IC with adjustable output, manufactured by Texas Instruments. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement. The TL431ACDBVRE4 operates as an adjustable shunt regulator suitable for precision voltage reference applications in power management circuits. Active alternatives ensure design continuity and supply chain reliability.

Substiute Parts

TL431ACDBVRE4

Texas InstrumentsIn Stock: 926TL431ACDBVRE4 Datasheet

Current PartRFQ

TL431ACDBVR

Texas InstrumentsIn Stock: 78193TL431ACDBVR Datasheet

MFR RecommendedRFQ

TL431AIL5T

STMicroelectronicsIn Stock: 4462TL431AIL5T Datasheet

UpgradeRFQ

AS431BKTR-G1

Diodes IncorporatedIn Stock: 4229AS431BKTR-G1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431ACDBVRE4 is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage - Output (Min/Fixed): 2.495V or 2.5V
• Voltage - Output (Max): 36 V
• Current - Output: 100 mA
• Tolerance: ±1%
• Package / Case: SC-74A, SOT-753
• Supplier Device Package: SOT-23-5
• Mounting Type: Surface Mount

The substitute parts identified maintain these core electrical specifications and physical packaging requirements. Variations in operating temperature range, cathode current, and product status (active vs. obsolete) are noted but do not preclude functional substitution when thermal and supply requirements are compatible with the application circuit design.

Parameter Comparison

Engineering Selection Recommendations

TL431ACDBVR (Texas Instruments): This part is the direct active equivalent of the TL431ACDBVRE4. It maintains identical electrical specifications and operating temperature range. As an active product with ROHS3 compliance and MSL 1 rating, it is the primary substitute for direct replacement in existing designs. Packaging is available in Cut Tape and Digi-Reel formats, supporting both prototype and production procurement.

TL431AIL5T (STMicroelectronics): This part provides extended operating temperature range (-40°C to 105°C) compared to the original specification (0°C to 70°C). Cathode current is specified at 700 µA versus 600 µA in the main part. This substitute is suitable for applications requiring wider temperature performance. ROHS3 compliance and MSL 1 rating confirm environmental and handling compatibility.

AS431BKTR-G1 (Diodes Incorporated): This part meets all core electrical substitution criteria with identical output current and tolerance specifications. The minimum output voltage is specified at 2.5V versus 2.495V, representing a negligible 0.02% difference within the ±1% tolerance band. Operating temperature extends to -40°C to 125°C, providing the widest thermal range. Cathode current is 1 mA, higher than the original 600 µA specification. MSL rating is 3 (168 Hours), requiring controlled storage conditions. ROHS3 compliance is confirmed.

All substitute parts maintain SOT-23-5 packaging and surface mount mounting type, ensuring PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can TL431ACDBVR be used as a direct replacement for TL431ACDBVRE4?

A: Yes. TL431ACDBVR is the active equivalent with identical electrical specifications, operating temperature range, and packaging. It is the recommended primary substitute.

Q: What is the difference between TL431AIL5T and the original part?

A: TL431AIL5T maintains all core electrical parameters but extends the operating temperature range to -40°C to 105°C and specifies cathode current at 700 µA instead of 600 µA. Select this part if your application requires operation beyond 0°C to 70°C.

Q: Is AS431BKTR-G1 compatible with the original design?

A: AS431BKTR-G1 meets all critical electrical substitution criteria. The 2.5V minimum output voltage differs by 0.02% from the 2.495V specification, which is within the ±1% tolerance. Cathode current is 1 mA versus 600 µA; verify that your circuit design accommodates this higher cathode current draw. MSL 3 rating requires controlled storage at specified humidity levels.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitutes carry ROHS3 compliance certification, meeting environmental and regulatory requirements equivalent to the original part.

Q: Does package compatibility require PCB redesign?

A: No. All substitute parts use SOT-23-5 packaging in SC-74A, SOT-753 case format, maintaining identical pinout and footprint compatibility with the original design.

Q: What is the significance of MSL rating differences?

A: TL431ACDBVRE4, TL431ACDBVR, and TL431AIL5T carry MSL 1 (Unlimited), allowing indefinite storage without moisture control. AS431BKTR-G1 carries MSL 3 (168 Hours), requiring storage in controlled humidity environments and baking before reflow soldering if storage limits are exceeded.