TL431BIP Equivalent & Substitute Parts

Part Overview

The TL431BIP is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation and reference applications. This adjustable reference provides a fixed output of 2.495V with a maximum output capability of 36V and supports output currents up to 100mA. The device is packaged in an 8-PDIP through-hole configuration.

The TL431BIP is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain identical electrical performance characteristics while potentially offering different packaging and mounting technologies to support modern manufacturing processes.

Substiute Parts

TL431BIP

Texas InstrumentsIn Stock: 3251TL431BIP Datasheet

Current PartRFQ

TL431BIDBZR

Texas InstrumentsIn Stock: 125372TL431BIDBZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431BIP is determined by equivalence in the following core electrical parameters: reference type (shunt), output type (adjustable), minimum output voltage (2.495V), maximum output voltage (36V), output current capability (100mA), tolerance (±0.5%), cathode current (700µA), and operating temperature range (-40°C ~ 85°C).

The TL431BIDBZR qualifies as a direct electrical equivalent, maintaining all specified electrical characteristics. The primary difference is the packaging format: the TL431BIDBZR uses a surface-mount SOT-23-3 package instead of the through-hole 8-DIP package of the original part. Both devices share the same base product number (TL431) and are manufactured by Texas Instruments under identical electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The TL431BIDBZR is the active equivalent for the obsolete TL431BIP. Both parts maintain identical electrical specifications and are ROHS3 compliant. Selection between these parts depends on the application's mounting technology requirements.

For through-hole PCB designs, the TL431BIP remains available in existing inventory (3143 pcs). For new designs or surface-mount manufacturing processes, the TL431BIDBZR is the appropriate selection, with significantly higher inventory availability (125300 pcs) and active product status ensuring long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the TL431BIDBZR replace the TL431BIP in existing designs?

A: Electrical replacement is direct. However, the TL431BIDBZR uses a surface-mount SOT-23-3 package while the TL431BIP uses a through-hole 8-DIP package. PCB layout and mounting technology must be compatible with the SOT-23-3 footprint.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by matching reference type (shunt), output type (adjustable), output voltage range (2.495V to 36V), output current (100mA), tolerance (±0.5%), cathode current (700µA), and operating temperature range (-40°C ~ 85°C).

Q: Why is the TL431BIP classified as obsolete?

A: The TL431BIP is an older through-hole package variant. The TL431BIDBZR surface-mount version represents the current active product line for this reference design.

Q: Are there compliance differences between the two parts?

A: Both parts are ROHS3 compliant and REACH unaffected. The TL431BIDBZR has a moisture sensitivity level (MSL) rating of 1 (Unlimited), while the TL431BIP lists MSL as Not Applicable.

Q: What inventory considerations should guide part selection?

A: The TL431BIP has 3143 pcs in stock with obsolete status. The TL431BIDBZR has 125300 pcs in stock with active product status, providing superior supply security for ongoing production.