IS31FL3731C-SALS2 Equivalent & Substitute Parts

Part Overview

The IS31FL3731C-SALS2 is a linear LED driver IC manufactured by Lumissil Microsystems, designed for applications requiring 18-channel output with analog dimming capability. This device is classified as a Power Management (PMIC) component and operates across a 2.7V to 5.5V supply voltage range with 34mA per-channel output current.

The IS31FL3731C-SALS2 has reached obsolete product status, making identification of equivalent substitute parts essential for ongoing design support, production continuity, and component procurement. Direct substitutes with identical electrical and mechanical specifications are available to maintain design compatibility without circuit modification.

Substiute Parts

IS31FL3731C-SALS2

Lumissil MicrosystemsIn Stock: 1036IS31FL3731C-SALS2 Datasheet

Current PartRFQ

IS31FL3731-SALS2

Lumissil MicrosystemsIn Stock: 2374IS31FL3731-SALS2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IS31FL3731C-SALS2 is determined by strict equivalence across the following critical parameters:

• Electrical Specifications: Supply voltage range (2.7V–5.5V), output channel count (18), per-channel current rating (34mA), and analog dimming functionality
• Package Compatibility: 28-SSOP surface mount package with identical 0.209" (5.30mm) width
• Environmental & Compliance: Operating temperature range (-40°C to 85°C), RoHS3 compliance, and MSL rating (3, 168 Hours)
• Manufacturer Consistency: Parts sourced from Lumissil Microsystems to ensure design validation and supply chain reliability

The IS31FL3731-SALS2 meets all substitution criteria as a direct equivalent with identical electrical and mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The IS31FL3731-SALS2 is the direct substitute for the obsolete IS31FL3731C-SALS2. Selection is based on the following engineering criteria:

• Product Status Alignment: The substitute part maintains active product status with Lumissil Microsystems, ensuring continued availability and manufacturing support
• Compliance Certification: Both parts maintain identical RoHS3 compliance and REACH unaffected status, meeting regulatory requirements for current and future production
• Electrical & Mechanical Equivalence: All functional parameters, supply voltage specifications, output channel configuration, and package dimensions are identical, enabling direct PCB-level substitution without design modification
• Supply Chain Continuity: The substitute part is currently in active inventory (2300 Pcs New Original In Stock), providing immediate procurement availability compared to the obsolete main part

Frequently Asked Questions (FAQ)

Q: Can the IS31FL3731-SALS2 be used as a direct replacement for the IS31FL3731C-SALS2 without circuit modification?

A: Yes. The IS31FL3731-SALS2 is electrically and mechanically identical to the IS31FL3731C-SALS2 across all specified parameters, including supply voltage range, output channel count, per-channel current rating, analog dimming functionality, and 28-SSOP package dimensions. No circuit redesign is required.

Q: Are there any differences in compliance or environmental ratings between these parts?

A: No. Both parts maintain identical RoHS3 compliance, REACH unaffected status, MSL rating (3, 168 Hours), and operating temperature range (-40°C to 85°C). Environmental and regulatory specifications are fully equivalent.

Q: Why is the main part listed as obsolete while the substitute is active?

A: The IS31FL3731C-SALS2 has reached end-of-life status with the manufacturer. The IS31FL3731-SALS2 represents the active production equivalent, ensuring continued design support and component availability for new and ongoing production requirements.

Q: What is the significance of the 28-SSOP package specification?

A: The 28-SSOP (Small Shrink Outline Package) with 0.209" (5.30mm) width is the physical package form factor. Both parts use identical package dimensions, ensuring compatibility with existing PCB layouts, solder reflow profiles, and assembly processes without modification.

Q: Are there any other substitute parts available for this application?

A: Based on the provided specifications, the IS31FL3731-SALS2 is the only listed direct substitute meeting all electrical, mechanical, and compliance requirements for the IS31FL3731C-SALS2.