LX432CSC Equivalent & Substitute Parts

Part Overview

The LX432CSC is a shunt voltage reference integrated circuit manufactured by Microchip Technology, designed for precision voltage regulation applications. This adjustable reference IC operates with a fixed output voltage of 1.24V and supports maximum output voltages up to 20V, with ±1% tolerance and 20mA output current capability in a compact SOT-23 surface mount package.

The LX432CSC is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this reference architecture.

Substiute Parts

LX432CSC

Microchip TechnologyIn Stock: 3905LX432CSC Datasheet

Current PartRFQ

AP432SAG-7

Diodes IncorporatedIn Stock: 21346AP432SAG-7 Datasheet

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LMV431AIMF/NOPB

Texas InstrumentsIn Stock: 16178LMV431AIMF/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LX432CSC are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine valid substitution:

Critical Substitution Parameters:

• Reference Type: Shunt (must match)
• Output Type: Adjustable (must match)
• Voltage - Output (Min/Fixed): 1.24V (must match)
• Package / Case: SOT-23-3 (must match)
• Mounting Type: Surface Mount (must match)
• Tolerance: ±1% (must match)
• Current - Cathode: 80µA (must match)

Allowable Variation Parameters:

• Voltage - Output (Max): May exceed 20V (higher maximum voltage is compatible)
• Current - Output: May differ if application requirements permit
• Operating Temperature: May have wider range (extended temperature support is compatible)
• Product Status: Active status preferred over obsolete for long-term availability

The substitute parts listed below satisfy all critical parameters while offering improved or equivalent performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

AP432SAG-7 (Diodes Incorporated): This substitute maintains full electrical and mechanical compatibility with the LX432CSC. Both devices share identical reference architecture, output voltage characteristics, and SOT-23-3 packaging. The AP432SAG-7 is supplied in Cut Tape (CT) format with 21,300 units in stock. However, this part is also classified as obsolete, limiting its long-term availability for future production requirements.

LMV431AIMF/NOPB (Texas Instruments): This substitute provides superior long-term availability as an active product with 16,116 units in stock. The LMV431AIMF/NOPB maintains critical electrical parameters including 1.24V fixed output voltage, ±1% tolerance, 80µA cathode current, and SOT-23-3 packaging. The device offers extended operating temperature range (-40°C ~ 85°C) compared to the LX432CSC (0°C ~ 70°C), providing broader environmental compatibility. Maximum output voltage is rated at 30V, exceeding the LX432CSC specification of 20V. Output current is specified at 15mA, which is lower than the LX432CSC 20mA rating but remains suitable for most reference applications. All devices maintain ROHS3 compliance and MSL Level 1 rating.

For new designs and long-term production support, the LMV431AIMF/NOPB is the preferred selection due to active product status and extended temperature range.

Frequently Asked Questions (FAQ)

Q: Can the AP432SAG-7 directly replace the LX432CSC in existing designs?

A: Yes. The AP432SAG-7 maintains identical electrical specifications (1.24V adjustable output, ±1% tolerance, 80µA cathode current) and package format (SOT-23-3). Pin configuration and functional behavior are equivalent, enabling direct substitution without circuit modification.

Q: What is the primary advantage of the LMV431AIMF/NOPB over the LX432CSC?

A: The LMV431AIMF/NOPB is classified as an active product, ensuring continued manufacturing and long-term supply availability. The extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) supports applications requiring broader environmental performance. The 30V maximum output voltage specification exceeds the LX432CSC 20V rating.

Q: Is the 15mA output current of the LMV431AIMF/NOPB sufficient as a replacement for the 20mA LX432CSC?

A: Substitution feasibility depends on application requirements. Shunt voltage reference ICs are typically used in low-current bias and feedback networks. If the design requires output currents exceeding 15mA, the LMV431AIMF/NOPB may not be suitable. Review circuit current demands before selection.

Q: Are all three parts RoHS compliant?

A: Yes. The LX432CSC, AP432SAG-7, and LMV431AIMF/NOPB are all ROHS3 compliant with MSL Level 1 (unlimited moisture sensitivity) rating, meeting environmental and reliability standards for industrial and commercial applications.

Q: What packaging formats are available for these substitute parts?

A: The LX432CSC is supplied in Bulk packaging. The AP432SAG-7 is available in Cut Tape (CT) format. The LMV431AIMF/NOPB is supplied in Cut Tape (CT) and Digi-Reel® formats. All three devices use identical SOT-23-3 surface mount package geometry.

Q: Why is the LX432CSC classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Existing inventory remains available, but no new manufacturing is planned. Identifying active substitute parts ensures design continuity and supply chain resilience for ongoing production.