SC4431CSK-1 TRT Equivalent & Substitute Parts

Part Overview

The SC4431CSK-1 TRT is a shunt voltage reference IC manufactured by Semtech Corporation, designed for adjustable output voltage applications in power management circuits. This component operates with a fixed output voltage of 1.224V to 13.776V and supports a maximum output current of 40 mA. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

SC4431CSK-1 TRT

Semtech CorporationIn Stock: 782SC4431CSK-1 TRT Datasheet

Current PartRFQ

TLVH431BIL5T

STMicroelectronicsIn Stock: 7142TLVH431BIL5T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC4431CSK-1 TRT is determined by the following critical parameters:

• Reference type classification (shunt voltage reference)
• Output type (adjustable)
• Package compatibility (SOT-23-5 / SC-74A)
• Electrical performance envelope (output voltage range, output current, tolerance, operating temperature)
• Input voltage range compatibility
• Cathode current specifications

The TLVH431BIL5T from STMicroelectronics meets these substitution criteria. Both components are adjustable shunt voltage references in identical SOT-23-5 packaging. The substitute part maintains functional compatibility through overlapping electrical specifications and enhanced performance characteristics in key parameters.

Parameter Comparison

Engineering Selection Recommendations

The TLVH431BIL5T is a direct functional substitute for the SC4431CSK-1 TRT based on the following engineering criteria:

• Both components share identical SOT-23-5 packaging, enabling direct PCB footprint compatibility without layout modifications
• The substitute part is classified as active product status, ensuring long-term availability and manufacturing support
• The TLVH431BIL5T provides enhanced electrical performance with tighter tolerance (±0.25% versus ±1%), higher maximum output current (60 mA versus 40 mA), and extended maximum output voltage (18V versus 13.776V)
• Operating temperature range of the substitute extends to 125°C, exceeding the original part's 85°C maximum
• Both components maintain identical moisture sensitivity classification (MSL 1)
• The substitute part carries ROHS3 compliance and REACH unaffected status, meeting modern regulatory requirements

Selection of the TLVH431BIL5T eliminates obsolescence risk while maintaining electrical compatibility and improving performance margins in the application circuit.

Frequently Asked Questions (FAQ)

Q: Can the TLVH431BIL5T directly replace the SC4431CSK-1 TRT without circuit modifications?

A: Yes. Both components are adjustable shunt voltage references in SOT-23-5 packaging with compatible electrical specifications. The substitute part's enhanced performance parameters (higher output current, tighter tolerance, extended voltage range) provide improved operating margins without requiring circuit redesign.

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

A: The primary differences are product status (obsolete versus active), tolerance specification (±1% versus ±0.25%), maximum output current (40 mA versus 60 mA), maximum output voltage (13.776V versus 18V), and operating temperature range (-40°C to 85°C versus -40°C to 125°C). The substitute part offers superior electrical performance across all parameters.

Q: Are the packages physically identical?

A: Yes. Both components use SC-74A / SOT-753 package designation with SOT-23-5 supplier device packaging. Pin configuration and PCB footprint are identical, enabling direct substitution without layout changes.

Q: Does the substitute part meet current regulatory compliance standards?

A: Yes. The TLVH431BIL5T is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components in most markets.

Q: What is the impact of the tighter tolerance specification on circuit performance?

A: The TLVH431BIL5T's ±0.25% tolerance versus the original part's ±1% tolerance provides improved output voltage accuracy. This reduces circuit design margin requirements and improves overall system performance stability.