TL431CPWR Equivalent & Substitute Parts

Part Overview

The TL431CPWR is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation and reference applications in power management circuits. This adjustable reference device operates across a 2.495V to 36V output range with ±2.2% tolerance and supports 100 mA output current. The part is classified as Obsolete, making identification of compatible substitutes essential for ongoing design support and procurement planning. Active equivalent models maintain identical electrical specifications while offering improved availability and extended product lifecycle support.

Substiute Parts

TL431CPWR

Texas InstrumentsIn Stock: 18507TL431CPWR Datasheet

Current PartRFQ

TL431CDBZR

Texas InstrumentsIn Stock: 26288TL431CDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431CPWR is determined by strict equivalence across core electrical parameters: reference type (Shunt), output type (Adjustable), voltage range (2.495V to 36V), output current (100 mA), tolerance (±2.2%), cathode current (1 mA), and operating temperature range (0°C ~ 70°C). The TL431CDBZR qualifies as a direct substitute based on identical electrical specifications and compliance certifications. Packaging differences (8-TSSOP versus SOT-23-3) represent the primary distinction and must be evaluated against circuit board layout and assembly capabilities. Both parts share the same base product number (TL431) and maintain equivalent performance characteristics across all specified operating conditions.

Parameter Comparison

Engineering Selection Recommendations

The TL431CDBZR is the primary substitute for the obsolete TL431CPWR. Both devices maintain identical electrical performance across all specified parameters and carry equivalent compliance certifications (ROHS3 Compliant, REACH Unaffected, EAR99 classification). The transition from 8-TSSOP to SOT-23-3 packaging represents a footprint change that requires PCB layout modification. The TL431CDBZR offers superior availability (26,200 units in stock versus 18,400 for the original part) and active product status, ensuring long-term supply chain stability and technical support. Selection between these parts depends solely on packaging compatibility with existing circuit board designs.

Frequently Asked Questions (FAQ)

Q: Can TL431CDBZR directly replace TL431CPWR without circuit modification?

A: Electrical substitution is complete. Packaging differs (SOT-23-3 versus 8-TSSOP), requiring PCB footprint redesign and assembly process adjustment. Pin configuration and electrical function remain identical.

Q: What determines compatibility between these shunt voltage reference devices?

A: Compatibility is established through matching reference type (Shunt), output type (Adjustable), voltage range (2.495V to 36V), output current (100 mA), tolerance (±2.2%), cathode current (1 mA), and operating temperature (0°C ~ 70°C). All parameters must align for direct substitution.

Q: Why is the TL431CPWR listed as Obsolete?

A: Product status reflects Texas Instruments' lifecycle management. The TL431CDBZR represents the active equivalent, maintaining identical specifications with improved long-term availability and support.

Q: Are there compliance differences between these parts?

A: No. Both parts carry identical compliance certifications: ROHS3 Compliant, REACH Unaffected, MSL 1 (Unlimited), and EAR99 classification.

Q: What is the primary consideration when selecting between these substitutes?

A: Packaging selection is the determining factor. The 8-TSSOP package (TL431CPWR) differs from SOT-23-3 (TL431CDBZR) in physical dimensions and pin layout. Circuit board design and assembly capabilities must accommodate the selected package type.