TLV431AIDR Equivalent & Substitute Parts

Part Overview

The TLV431AIDR is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage regulation applications. This adjustable reference provides a fixed output of 1.24V with a maximum output voltage of 6V and supports a 15mA output current. The device is packaged in an 8-SOIC surface mount configuration and operates across the industrial temperature range of -40°C to 85°C.

The TLV431AIDR carries a Last Time Buy status, indicating that this specific part number will no longer be manufactured after existing inventory is depleted. This necessitates identification of equivalent substitute parts that maintain functional compatibility while ensuring continued design support and supply chain availability.

Substiute Parts

TLV431AIDR

Texas InstrumentsIn Stock: 2770TLV431AIDR Datasheet

Current PartRFQ

TLV431AIDBZR

Texas InstrumentsIn Stock: 68481TLV431AIDBZR Datasheet

MFR RecommendedRFQ

LMV431AIM5/NOPB

Texas InstrumentsIn Stock: 126211LMV431AIM5/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLV431AIDR is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Reference Type: Shunt (must remain constant)
• Output Type: Adjustable (must remain constant)
• Voltage - Output (Min/Fixed): 1.24V (must match)
• Current - Output: 15mA (must match)
• Tolerance: ±1% (must match)
• Current - Cathode: 80µA (must match)
• Operating Temperature: -40°C to 85°C (must match or exceed)

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount (must remain constant)
• RoHS Status: ROHS3 Compliant (must maintain compliance)
• MSL Rating: 1 (Unlimited) (must match or exceed)

Allowable Variation:

• Voltage - Output (Max): May exceed 6V without functional impact, as the device operates within the specified maximum output range
• Package / Case: May differ provided pin count and electrical function remain compatible

The identified substitute parts maintain all critical electrical parameters while offering alternative packaging options and improved product status.

Parameter Comparison

Engineering Selection Recommendations

TLV431AIDBZR is the primary substitute for the TLV431AIDR. Both devices share identical electrical specifications and operating parameters. The TLV431AIDBZR offers the advantage of Active product status with significantly higher inventory availability (68,400 units in stock versus 2,711 units for the main part). The package transition from 8-SOIC to SOT-23-3 requires PCB layout modification but maintains full functional compatibility. This part is recommended for new designs and production transitions.

LMV431AIM5/NOPB is an alternative substitute with Active product status and the highest inventory availability (126,200 units in stock). This device maintains all critical electrical parameters but features an extended maximum output voltage rating of 30V and a different package configuration (SOT-23-5). The LMV431AIM5/NOPB is suitable for applications where the higher voltage rating provides design margin or where SOT-23-5 packaging is preferred. PCB layout modification is required for this substitution.

Both substitute parts maintain ROHS3 compliance and MSL Level 1 ratings, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the TLV431AIDBZR directly replace the TLV431AIDR without circuit modification?

A: The TLV431AIDBZR maintains identical electrical specifications and can functionally replace the TLV431AIDR. However, the package change from 8-SOIC to SOT-23-3 requires PCB layout modification. Pin functionality remains equivalent, but physical placement and routing must be redesigned.

Q: What is the difference between the TLV431AIDBZR and LMV431AIM5/NOPB?

A: Both devices provide the same core shunt voltage reference functionality with 1.24V fixed output and 15mA output current. The primary difference is the maximum output voltage rating: TLV431AIDBZR is rated to 6V, while LMV431AIM5/NOPB is rated to 30V. Additionally, the packages differ (SOT-23-3 versus SOT-23-5), requiring different PCB layouts.

Q: Why is the TLV431AIDR marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued this specific part number and will not manufacture additional units beyond current inventory. This is a standard lifecycle management practice. Customers should transition to active substitute parts to ensure long-term supply chain continuity.

Q: Are there any compliance or certification differences between the main part and substitutes?

A: No. All three parts (TLV431AIDR, TLV431AIDBZR, and LMV431AIM5/NOPB) maintain ROHS3 compliance, REACH Unaffected status, and MSL Level 1 ratings. Compliance certifications are equivalent across all options.

Q: Which substitute should I select for a new design?

A: For new designs, the TLV431AIDBZR is recommended as the primary choice due to its Active product status, matching electrical specifications, and adequate inventory. The LMV431AIM5/NOPB is suitable if the extended 30V maximum output voltage provides design benefits or if SOT-23-5 packaging is preferred for your application.

Q: What PCB modifications are required when switching from TLV431AIDR to either substitute?

A: Package footprint changes require PCB redesign. The 8-SOIC package must be replaced with either SOT-23-3 (TLV431AIDBZR) or SOT-23-5 (LMV431AIM5/NOPB) footprints. Pin assignments differ between packages, necessitating schematic and layout review to ensure correct signal routing and component placement.