AP432ASRG-7 Equivalent & Substitute Parts

Part Overview

The AP432ASRG-7 is a shunt voltage reference IC manufactured by Diodes Incorporated, designed for adjustable voltage regulation applications. This component features a fixed output voltage of 1.24V with adjustable maximum voltage up to 20V, delivering 200mA output current with ±0.5% tolerance. The part is packaged in SOT23R surface mount configuration and is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

AP432ASRG-7

Diodes IncorporatedIn Stock: 81509AP432ASRG-7 Datasheet

Current PartRFQ

AZ431LANTR-G1

Diodes IncorporatedIn Stock: 23121AZ431LANTR-G1 Datasheet

MFR RecommendedRFQ

AP432AWG-7

Diodes IncorporatedIn Stock: 24379AP432AWG-7 Datasheet

Parametric EquivalentRFQ

LX432CSC

Microchip TechnologyIn Stock: 3905LX432CSC Datasheet

MFR RecommendedRFQ

LX432ISC

Microchip TechnologyIn Stock: 4147LX432ISC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP432ASRG-7 is determined by the following critical parameters: reference type (shunt), output type (adjustable), minimum fixed output voltage (1.24V), maximum output voltage capability, output current rating, voltage tolerance, operating temperature range, and package compatibility. Substitute parts must maintain functional equivalence across these electrical and mechanical specifications to ensure circuit performance and reliability.

The substitute parts identified fall into two categories:

MFR Recommended Substitute: AZ431LANTR-G1 represents the manufacturer-recommended alternative, offering active product status with enhanced temperature range and improved specifications.

Parametric Equivalents: AP432AWG-7, LX432CSC, and LX432ISC provide functional substitution with varying tolerance and current output characteristics, suitable for applications where the specific parameter variations are acceptable.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: AZ431LANTR-G1

The AZ431LANTR-G1 is the manufacturer-recommended substitute for the AP432ASRG-7. This part maintains active product status, ensuring long-term availability and supply chain stability. It provides identical reference type, output type, and minimum output voltage specifications. The AZ431LANTR-G1 offers an extended operating temperature range (-40°C to 125°C) compared to the original part, supporting broader environmental applications. While maximum output voltage is reduced to 18V and output current to 100mA, these parameters remain suitable for most voltage reference applications. The improved temperature coefficient (20ppm/°C typical) and lower cathode current (80µA) provide enhanced performance characteristics. ROHS3 compliance and MSL rating 3 certification match the original part requirements.

Secondary Recommendation: LX432ISC

The LX432ISC from Microchip Technology provides an active product alternative with full parameter compatibility in critical specifications: 1.24V minimum output, 20V maximum output, and -40°C to 85°C operating range. This part maintains the same package compatibility and ROHS3 compliance. The primary trade-off is reduced output current (20mA versus 200mA) and relaxed tolerance (±1% versus ±0.5%). The MSL rating 1 (unlimited) provides superior moisture handling characteristics. This substitute is suitable for applications where output current requirements do not exceed 20mA.

Tertiary Option: AP432AWG-7

The AP432AWG-7 maintains identical electrical specifications to the original part (20V maximum, 200mA output, ±0.5% tolerance, 30ppm/°C coefficient) but differs in package configuration (SC-59-3 versus SOT23R). This part is suitable only if PCB layout accommodates the SC-59-3 package variant. Product status remains obsolete, limiting long-term availability.

Frequently Asked Questions (FAQ)

Q: Can the AZ431LANTR-G1 replace the AP432ASRG-7 in all applications?

A: The AZ431LANTR-G1 is suitable for most applications. The maximum output voltage is reduced from 20V to 18V, and output current is reduced from 200mA to 100mA. Verify that your circuit design operates within these reduced specifications before substitution.

Q: What is the primary advantage of selecting LX432ISC over AZ431LANTR-G1?

A: The LX432ISC offers active product status from Microchip Technology and MSL rating 1 (unlimited moisture sensitivity), compared to MSL rating 3 for the AZ431LANTR-G1. However, the LX432ISC is limited to 20mA output current, making it unsuitable for applications requiring higher current delivery.

Q: Are all substitute parts compatible with the SOT23R package footprint?

A: No. The AZ431LANTR-G1 uses SOT-23-3 package, and LX432ISC uses SOT-23 package. While these are mechanically similar, verify PCB footprint compatibility. The AP432AWG-7 uses SC-59-3 package, which requires different PCB layout. Consult package datasheets for precise pin and land dimensions.

Q: What is the impact of tolerance differences between ±0.5% and ±1%?

A: The ±0.5% tolerance of the AP432ASRG-7 and AZ431LANTR-G1 provides tighter voltage regulation accuracy compared to the ±1% tolerance of LX432 variants. Applications requiring precise voltage reference should prioritize the ±0.5% tolerance parts.

Q: Why is product status important for this substitution?

A: The AP432ASRG-7 is classified as obsolete, indicating discontinued manufacturing and limited remaining inventory. Active product alternatives (AZ431LANTR-G1 and LX432ISC) ensure continued availability for future production runs and design revisions.

Q: How do temperature coefficient differences affect circuit performance?

A: The AP432ASRG-7 and AP432AWG-7 specify 30ppm/°C temperature coefficient, while the AZ431LANTR-G1 specifies 20ppm/°C typical. Lower temperature coefficient indicates better voltage stability across temperature variations. For applications operating across wide temperature ranges, the AZ431LANTR-G1 provides superior performance.