RT9426WSC Equivalent & Substitute Parts

Part Overview

The RT9426WSC is an active, single-cell battery fuel gauge integrated circuit manufactured by Richtek USA Inc. This Power Management IC is designed for lithium ion and lithium polymer battery applications, providing real-time fuel gauge functionality with integrated fault protection. The device operates across an industrial temperature range of -40°C to 85°C and communicates via I2C interface.

Substitute parts are identified when design requirements necessitate alternative packaging formats, inventory availability changes, or when equivalent electrical and mechanical specifications are required for production continuity.

Substiute Parts

RT9426WSC

Richtek USA Inc.In Stock: 17262RT9426WSC Datasheet

Current PartRFQ

RT9426AWSC

Richtek USA Inc.In Stock: 3472RT9426AWSC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The RT9426AWSC is identified as a parametric equivalent to the RT9426WSC based on strict electrical and mechanical compatibility criteria. Both devices share identical specifications across all critical substitution parameters:

Substitution-Determining Parameters:

• Function: Fuel Gauge
• Battery Chemistry: Lithium Ion/Polymer
• Number of Cells: 1
• Interface: I2C
• Operating Temperature Range: -40°C ~ 85°C
• Package / Case: 9-UFBGA, WLCSP
• Supplier Device Package: 9-WLCSP (2.29x1.74)
• Fault Protection: Over Temperature, Over/Under Voltage
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The primary distinction between these parts is the packaging format: RT9426WSC is supplied in Cut Tape (CT) & Digi-Reel® format, while RT9426AWSC is supplied in Tape & Reel (TR) format. Both formats are standard surface-mount delivery methods with no impact on device functionality or electrical performance.

Parameter Comparison

Engineering Selection Recommendations

Both RT9426WSC and RT9426AWSC are active products with identical electrical specifications and regulatory compliance status. Selection between these parts is determined by packaging and supply chain requirements rather than functional capability.

RT9426WSC (Cut Tape & Digi-Reel®): Select this part number when cut tape packaging is required for lower-volume applications, prototype development, or when existing supply chain processes specify this format.

RT9426AWSC (Tape & Reel): Select this part number for high-volume production runs where standard tape and reel packaging is preferred, or when supply chain logistics require this standard format.

Both devices maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and REACH unaffected status. No functional or performance differences exist between these part numbers. The choice between them is purely a packaging and logistics decision with no impact on circuit design, PCB layout, or device operation.

Frequently Asked Questions (FAQ)

Q: Are RT9426WSC and RT9426AWSC electrically identical?

A: Yes. Both parts are single-cell lithium ion/polymer fuel gauge ICs with identical electrical specifications, I2C interface, operating temperature range (-40°C to 85°C), fault protection features, and package dimensions (9-WLCSP, 2.29x1.74mm).

Q: What is the difference between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging?

A: Cut Tape & Digi-Reel® format provides components on tape that can be cut to length for smaller orders, while Tape & Reel format supplies components on continuous tape wound on a reel for automated high-volume assembly. Both formats are surface-mount compatible with no functional differences.

Q: Can I substitute RT9426AWSC for RT9426WSC in my design?

A: Yes. The RT9426AWSC is a direct parametric equivalent. No circuit design changes, PCB layout modifications, or firmware updates are required. The substitution affects only component procurement and supply chain logistics.

Q: Are both parts RoHS compliant?

A: Yes. Both RT9426WSC and RT9426AWSC are ROHS3 compliant with REACH unaffected status and EAR99 export classification.

Q: What is the moisture sensitivity level for these parts?

A: Both parts have Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control requirements during storage or handling.

Q: Do these parts require different PCB footprints?

A: No. Both parts use the identical 9-WLCSP (2.29x1.74mm) package, requiring the same PCB footprint and solder reflow profile.