TL431ACPSR Equivalent & Substitute Parts

Part Overview

The TL431ACPSR is a shunt voltage reference IC with adjustable output, manufactured by Texas Instruments. This component functions as a precision voltage reference suitable for power management applications requiring stable reference voltages between 2.495V and 36V. The part is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and ongoing production requirements. The TL431ACPSR is packaged in 8-SOIC form factor and maintains ROHS3 compliance with unlimited moisture sensitivity rating.

Substiute Parts

TL431ACPSR

Texas InstrumentsIn Stock: 2158TL431ACPSR Datasheet

Current PartRFQ

TL431ACDBZR

Texas InstrumentsIn Stock: 77248TL431ACDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431ACPSR is determined by equivalence across the following critical parameters: reference type (shunt), output type (adjustable), output voltage range (2.495V to 36V), output current capability (100 mA), tolerance specification (±1%), cathode current (600 µA), and operating temperature range (0°C to 70°C). The TL431ACDBZR qualifies as a direct functional equivalent, sharing identical electrical specifications and the same base product number (TL431). The primary distinction between these parts is packaging format: the main part uses 8-SOIC while the substitute uses SOT-23-3. Both maintain ROHS3 compliance and unlimited moisture sensitivity rating. The substitute part carries active product status, making it suitable for production applications where the obsolete variant is no longer available.

Parameter Comparison

Engineering Selection Recommendations

The TL431ACDBZR is the direct substitute for the TL431ACPSR based on identical electrical performance specifications and shared base product designation. Selection of the substitute part is driven by product status: the main part is obsolete while the substitute maintains active production status. Both parts satisfy ROHS3 compliance requirements and carry unlimited moisture sensitivity classification. The substitution requires PCB layout modification to accommodate the different package footprint (SOT-23-3 versus 8-SOIC). Pin configuration and electrical function remain equivalent, enabling direct functional replacement in circuit designs. For applications where the 8-SOIC package is mandatory, alternative sources or design revision may be necessary.

Frequently Asked Questions (FAQ)

Q: Can TL431ACDBZR directly replace TL431ACPSR in existing designs?

A: Electrical substitution is direct due to identical specifications. Physical substitution requires PCB redesign to accommodate the SOT-23-3 package footprint in place of the 8-SOIC package.

Q: What are the key differences between these parts?

A: The parts are electrically identical. The primary difference is packaging: TL431ACPSR uses 8-SOIC (0.209", 5.30mm width) while TL431ACDBZR uses SOT-23-3 (TO-236-3, SC-59). The substitute part is in active production status.

Q: Are both parts RoHS compliant?

A: Yes, both TL431ACPSR and TL431ACDBZR are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: What output voltage range do these parts support?

A: Both parts provide adjustable shunt voltage reference output from 2.495V minimum to 36V maximum with ±1% tolerance.

Q: Is the 600 µA cathode current specification the same for both parts?

A: Yes, both parts specify 600 µA cathode current and 100 mA output current capability.

Q: What is the operating temperature range?

A: Both parts operate across 0°C to 70°C ambient temperature range.