TL431BCPSR Equivalent & Substitute Parts

Part Overview

The TL431BCPSR is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation and reference applications. This adjustable reference device operates across a 2.495V to 36V output range with ±0.5% tolerance and supports 100 mA output current. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. Active alternatives with identical electrical specifications are available to ensure uninterrupted supply chain access.

Substiute Parts

TL431BCPSR

Texas InstrumentsIn Stock: 5239TL431BCPSR Datasheet

Current PartRFQ

TL431BCDBZR

Texas InstrumentsIn Stock: 56226TL431BCDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431BCPSR is determined by strict equivalence across core electrical and mechanical parameters. The primary substitute, TL431BCDBZR, maintains identical electrical specifications including adjustable output voltage range (2.495V to 36V), output current capacity (100 mA), tolerance (±0.5%), cathode current (600 µA), and operating temperature range (0°C to 70°C). Both parts share the same base product number (TL431) and are manufactured by Texas Instruments.

The key differentiator between these parts is packaging format: the main part uses 8-SOIC (0.209", 5.30mm Width) in Tape & Reel configuration, while the substitute uses SOT-23-3 in Cut Tape & Digi-Reel® format. Both maintain Surface Mount mounting type and identical compliance certifications (ROHS3, REACH Unaffected, EAR99). The substitute part carries Active product status, providing long-term availability assurance compared to the Obsolete status of the main part.

Parameter Comparison

Engineering Selection Recommendations

The TL431BCDBZR serves as the direct electrical equivalent to the TL431BCPSR, with identical performance specifications across all critical parameters. Selection between these parts should be driven by packaging and form factor requirements specific to the application circuit board layout.

The TL431BCDBZR is recommended for new designs and production continuity due to its Active product status, ensuring sustained availability and manufacturing support from Texas Instruments. Both parts maintain equivalent compliance certifications (ROHS3 Compliant, REACH Unaffected, EAR99), supporting regulatory requirements across global markets.

PCB layout modifications are required when transitioning from 8-SOIC to SOT-23-3 packaging. The SOT-23-3 package occupies significantly less board space, which may provide design advantages in space-constrained applications. Electrical performance remains unchanged, allowing direct functional substitution once layout accommodations are implemented.

Frequently Asked Questions (FAQ)

Q: Are the TL431BCPSR and TL431BCDBZR electrically identical?

A: Yes. Both parts maintain identical electrical specifications: 2.495V to 36V adjustable output range, 100 mA output current, ±0.5% tolerance, 600 µA cathode current, and 0°C to 70°C operating temperature range.

Q: What is the primary difference between these parts?

A: The main difference is packaging format. The TL431BCPSR uses 8-SOIC (0.209", 5.30mm Width) in Tape & Reel format, while the TL431BCDBZR uses SOT-23-3 in Cut Tape & Digi-Reel® format. Both are surface mount devices.

Q: Can I directly replace TL431BCPSR with TL431BCDBZR on an existing PCB?

A: Direct PCB replacement is not possible without layout modification due to different package footprints. The 8-SOIC and SOT-23-3 packages have different pin configurations and physical dimensions. PCB redesign is required to accommodate the SOT-23-3 footprint.

Q: Why is the TL431BCPSR listed as obsolete?

A: The TL431BCPSR has reached end-of-life status with Texas Instruments. The TL431BCDBZR, with Active product status, represents the current manufacturing alternative for this functional specification.

Q: Are compliance certifications equivalent between these parts?

A: Yes. Both parts carry identical compliance certifications: ROHS3 Compliant, REACH Unaffected, EAR99 classification, and MSL 1 (Unlimited) moisture sensitivity level.

Q: Which part should I specify for new designs?

A: The TL431BCDBZR should be specified for new designs due to its Active product status and assured long-term availability from Texas Instruments.