TL431IDBVRG4 Equivalent & Substitute Parts

Part Overview

The TL431IDBVRG4 is a shunt voltage reference IC with adjustable output, manufactured by Texas Instruments in SOT-23-5 surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The TL431IDBVRG4 delivers a 2.495V adjustable output with ±2.2% tolerance and supports up to 100 mA output current across a -40°C to 85°C operating temperature range. Substitute parts maintain core electrical specifications while offering improved availability and, in some cases, enhanced performance characteristics.

Substiute Parts

TL431IDBVRG4

Texas InstrumentsIn Stock: 23436TL431IDBVRG4 Datasheet

Current PartRFQ

TL431IDBVR

Texas InstrumentsIn Stock: 15393TL431IDBVR Datasheet

MFR RecommendedRFQ

TL431IL5T

STMicroelectronicsIn Stock: 9222TL431IL5T Datasheet

UpgradeRFQ

AS431BKTR-G1

Diodes IncorporatedIn Stock: 4229AS431BKTR-G1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431IDBVRG4 is determined by strict equivalence in the following electrical and mechanical parameters:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage - Output (Min/Fixed): 2.495V or 2.5V
• Voltage - Output (Max): 36V
• Current - Output: 100 mA
• Current - Cathode: 1 mA
• Package / Case: SC-74A, SOT-753 (SOT-23-5)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories: MFR Recommended (direct replacements with active product status) and Upgrade options (enhanced specifications with extended operating temperature ranges or improved tolerance).

Parameter Comparison

Engineering Selection Recommendations

TL431IDBVR (Texas Instruments) is the primary MFR recommended substitute. It maintains identical electrical specifications and operating temperature range as the obsolete TL431IDBVRG4 while offering active product status and improved availability. This part is suitable for direct replacement in existing designs without modification.

TL431IL5T (STMicroelectronics) serves as an upgrade option with extended operating temperature range (-40°C to 105°C versus -40°C to 85°C). Tolerance remains equivalent at ±2.21%, and all other electrical parameters match the main part. This option is appropriate for applications requiring enhanced thermal performance.

AS431BKTR-G1 (Diodes Incorporated) provides the tightest tolerance specification at ±1% with the widest operating temperature range (-40°C to 125°C). The output voltage minimum is specified at 2.5V rather than 2.495V. This part is suitable for precision applications where tighter tolerance and extended temperature operation are required. MSL rating of 3 requires 168-hour moisture bake-out prior to reflow.

All substitute parts maintain ROHS3 compliance and are available in the same SOT-23-5 surface mount package, ensuring PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can TL431IDBVR be used as a direct replacement for TL431IDBVRG4?

A: Yes. TL431IDBVR is electrically and mechanically identical to TL431IDBVRG4, with matching voltage output, tolerance, current ratings, and operating temperature range. The primary difference is product status: TL431IDBVR is active, while TL431IDBVRG4 is obsolete.

Q: What is the difference between TL431IL5T and TL431IDBVR?

A: TL431IL5T extends the operating temperature range to 105°C (versus 85°C for TL431IDBVR) and is manufactured by STMicroelectronics rather than Texas Instruments. Tolerance and all other electrical specifications remain equivalent.

Q: Is AS431BKTR-G1 compatible with designs using TL431IDBVRG4?

A: AS431BKTR-G1 is electrically compatible with equivalent shunt reference functionality. However, it features tighter tolerance (±1% versus ±2.2%), wider operating temperature range (-40°C to 125°C), and a minimum output voltage of 2.5V instead of 2.495V. Verify that your circuit design tolerates these parameter differences before substitution.

Q: What does MSL 3 mean for AS431BKTR-G1?

A: MSL 3 indicates Moisture Sensitivity Level 3, requiring a 168-hour moisture bake-out at specified temperature and humidity conditions prior to reflow soldering. This is more stringent than MSL 1 (unlimited shelf life without bake-out) specified for other substitutes.

Q: Are all substitute parts available in SOT-23-5 packaging?

A: Yes. All substitute parts are available in SC-74A / SOT-753 (SOT-23-5) surface mount packaging, ensuring direct PCB layout compatibility with the original TL431IDBVRG4.

Q: Which substitute should I select for a new design?

A: For standard applications, TL431IDBVR is recommended as the primary choice due to identical specifications and active product status. For applications requiring extended temperature operation, TL431IL5T is appropriate. For precision applications with tight tolerance requirements, AS431BKTR-G1 is suitable, provided MSL 3 handling procedures are implemented.