SC4431CSK-2TRT Equivalent & Substitute Parts

Part Overview

The SC4431CSK-2TRT is a shunt voltage reference IC manufactured by Semtech Corporation, designed for adjustable voltage reference applications in power management circuits. This component operates with an adjustable output range from 1.224V to 13.776V and delivers up to 40mA output current with ±2% tolerance. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing design support and production continuity.

Substiute Parts

SC4431CSK-2TRT

Semtech CorporationIn Stock: 898SC4431CSK-2TRT Datasheet

Current PartRFQ

TLVH431LIL5T

STMicroelectronicsIn Stock: 9173TLVH431LIL5T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC4431CSK-2TRT is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use SOT-23-5 (SC-74A, SOT-753) surface mount packaging to ensure mechanical and electrical compatibility with existing PCB layouts.

Reference Type & Output Type: The substitute must maintain shunt reference topology with adjustable output capability to preserve circuit functionality.

Electrical Performance Range: The substitute's output voltage range must encompass or exceed the application requirements. The SC4431CSK-2TRT operates from 1.224V to 13.776V; substitute parts with extended ranges (such as 1.24V to 18V) remain compatible for applications within the original voltage window.

Output Current Capability: The substitute must deliver sufficient output current for the application. The SC4431CSK-2TRT provides 40mA; substitutes with equal or greater current capacity (60mA or higher) are acceptable.

Tolerance & Accuracy: The SC4431CSK-2TRT specifies ±2% tolerance. Substitutes with equal or tighter tolerance (±1.5% or better) maintain or improve accuracy.

Operating Temperature Range: The SC4431CSK-2TRT operates from -40°C to 85°C. Substitutes with equal or extended temperature ranges are compatible.

Input Voltage Range: The substitute's input voltage specification must support the application's supply voltage requirements.

Parameter Comparison

Engineering Selection Recommendations

The TLVH431LIL5T from STMicroelectronics is a direct substitute for the obsolete SC4431CSK-2TRT. Both components share identical package geometry (SOT-23-5), reference topology (shunt), and output configuration (adjustable). The substitute meets or exceeds all critical electrical parameters: output voltage range (1.24V to 18V encompasses the original 1.224V to 13.776V specification), output current (60mA exceeds the original 40mA), and tolerance (±1.5% is tighter than the original ±2%).

The TLVH431LIL5T offers additional advantages: active product status ensures ongoing availability and manufacturing support, extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), and RoHS3 compliance for regulatory alignment. The substitute is suitable for direct replacement in applications where the SC4431CSK-2TRT was originally specified, provided the application's input voltage requirements are verified against the substitute's datasheet.

Frequently Asked Questions (FAQ)

Q: Can the TLVH431LIL5T be used as a direct drop-in replacement for the SC4431CSK-2TRT?

A: Yes. Both components use identical SOT-23-5 packaging, share shunt reference topology with adjustable output, and the substitute's electrical specifications meet or exceed the original part's requirements. PCB layout and pin assignments remain unchanged.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer (Semtech versus STMicroelectronics), product status (obsolete versus active), and enhanced specifications in the substitute. The TLVH431LIL5T provides higher output current (60mA versus 40mA), extended output voltage range (18V maximum versus 13.776V), tighter tolerance (±1.5% versus ±2%), and wider operating temperature range (-40°C to 125°C versus -40°C to 85°C).

Q: Are there any compatibility concerns with the substitute?

A: No compatibility concerns exist for package, pinout, or functional topology. The substitute's enhanced specifications (higher current, extended voltage range, tighter tolerance) ensure compatibility with applications designed for the original part. Verify that the application's input voltage requirements are supported by the substitute's datasheet specifications.

Q: Does the TLVH431LIL5T meet regulatory requirements?

A: Yes. The TLVH431LIL5T is RoHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components. Both parts share identical MSL rating (1, Unlimited) and ECCN classification (EAR99).

Q: Why is the SC4431CSK-2TRT obsolete?

A: The SC4431CSK-2TRT is classified as obsolete by Semtech Corporation. The TLVH431LIL5T from STMicroelectronics represents the active, supported alternative for new designs and production continuity.

Q: What is the temperature coefficient specification for the SC4431CSK-2TRT?

A: The temperature coefficient is not specified in the available documentation for the SC4431CSK-2TRT. The TLVH431LIL5T specifies 100ppm/°C for reference.