TL431CDBVTG4 Equivalent & Substitute Parts

Part Overview

The TL431CDBVTG4 is a shunt voltage reference IC with adjustable output, manufactured by Texas Instruments in SOT-23-5 surface mount packaging. This component functions as a precision voltage reference for power management applications, offering adjustable output from 2.495V to 36V with ±2.2% tolerance and 100mA output current capability. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

TL431CDBVTG4

Texas InstrumentsIn Stock: 962TL431CDBVTG4 Datasheet

Current PartRFQ

TL431CDBVT

Texas InstrumentsIn Stock: 3317TL431CDBVT 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 for the TL431CDBVTG4 is determined by strict equivalence across the following critical parameters:

• Reference Type: Shunt voltage reference
• Output Type: Adjustable
• Voltage Range: 2.495V minimum to 36V maximum output capability
• Output Current: 100mA
• Tolerance: ±2.2% or better
• Package: SOT-23-5 (SC-74A, SOT-753)
• Mounting: Surface Mount
• Compliance: ROHS3 Compliant, REACH Unaffected

Substitute parts must maintain electrical equivalence within these parameters. Parts with superior specifications (lower tolerance, extended temperature range, higher MSL rating) are classified as upgrades and remain functionally compatible.

Parameter Comparison

Engineering Selection Recommendations

TL431CDBVT is the manufacturer-recommended direct equivalent, maintaining identical electrical specifications and operating temperature range while offering active product status and higher inventory availability. This part is the primary choice for direct replacement in existing designs.

TL431IL5T represents an upgrade option from STMicroelectronics, providing extended operating temperature range (-40°C to 105°C) and marginally improved tolerance (±2.21%), while maintaining all other electrical equivalence. This part is suitable for applications requiring broader temperature performance.

AS431BKTR-G1 from Diodes Incorporated offers superior tolerance (±1%) and extended operating temperature range (-40°C to 125°C), with specified temperature coefficient of 20ppm/°C. This part is suitable for precision applications requiring tighter voltage reference accuracy. Note the MSL rating of 3 (168 Hours) requires appropriate moisture control during storage and handling compared to the MSL 1 rating of other options.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory equivalence for production use.

Frequently Asked Questions (FAQ)

Q: Can TL431CDBVT be used as a direct replacement for TL431CDBVTG4?

A: Yes. TL431CDBVT is electrically and mechanically equivalent, with identical voltage output range (2.495V to 36V), current rating (100mA), tolerance (±2.2%), and operating temperature (0°C to 70°C). The primary difference is product status (active vs. obsolete) and packaging format (Tape & Reel vs. unspecified).

Q: What is the difference between the three substitute options?

A: TL431CDBVT maintains exact specifications of the original part. TL431IL5T extends the operating temperature range to -40°C to 105°C. AS431BKTR-G1 provides the tightest tolerance (±1%) and widest temperature range (-40°C to 125°C), with specified temperature coefficient performance.

Q: Are all substitute parts in the same SOT-23-5 package?

A: Yes. All substitute parts use SOT-23-5 packaging (SC-74A, SOT-753 case designation), ensuring mechanical and pin compatibility for direct PCB replacement.

Q: Does AS431BKTR-G1 require special handling due to its MSL rating?

A: AS431BKTR-G1 has MSL 3 (168 Hours) compared to MSL 1 (Unlimited) for other options. This requires moisture control during storage and handling. Parts must be stored in dry conditions and used within 168 hours of bag opening under standard humidity conditions.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, maintaining regulatory equivalence for production applications.