PCU9956ATWY Equivalent & Substitute Parts

Part Overview

The PCU9956ATWY is a 24-output LED driver IC manufactured by NXP USA Inc., designed for linear PWM dimming applications in backlight systems. This device operates across a 3V to 5.5V supply range with 65mA per-channel output capability in a 38-HTSSOP surface mount package.

The PCU9956ATWY is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

PCU9956ATWY

NXP USA Inc.In Stock: 753PCU9956ATWY Datasheet

Current PartRFQ

PCA9956BTWY

NXP USA Inc.In Stock: 3207PCA9956BTWY Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCU9956ATWY are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

• Identical number of outputs (24 channels)
• Matching supply voltage range (3V to 5.5V)
• Identical per-channel output current (65mA)
• Same dimming control method (PWM)
• Identical package type (38-TFSOP with exposed pad)
• Same mounting technology (Surface Mount)
• Compatible operating temperature range (-40°C ~ 85°C)
• Same manufacturer (NXP USA Inc.)

The PCA9956BTWY meets all substitution criteria and is classified as an active product, providing improved supply availability compared to the obsolete PCU9956ATWY.

Parameter Comparison

Engineering Selection Recommendations

The PCA9956BTWY is the direct substitute for the obsolete PCU9956ATWY. Both devices are manufactured by NXP USA Inc. and maintain identical electrical specifications and package configurations.

The PCA9956BTWY is currently in active production status, ensuring reliable supply chain availability. Both parts carry ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for current manufacturing environments.

The primary difference between the two parts is the Moisture Sensitivity Level (MSL): the PCU9956ATWY carries MSL 1 (unlimited moisture protection), while the PCA9956BTWY carries MSL 3 (168-hour moisture protection). This difference requires appropriate handling and storage protocols during component procurement and assembly operations.

Frequently Asked Questions (FAQ)

Q: Can the PCA9956BTWY be used as a direct replacement for the PCU9956ATWY?

A: Yes. The PCA9956BTWY is electrically and mechanically equivalent to the PCU9956ATWY. All critical parameters—output count, supply voltage range, per-channel current, PWM dimming capability, package type, and operating temperature range—are identical.

Q: What is the difference in Moisture Sensitivity Level (MSL) between these parts?

A: The PCU9956ATWY has MSL 1 (unlimited moisture protection), while the PCA9956BTWY has MSL 3 (168-hour moisture protection). MSL 3 requires that the component be used within 168 hours of package opening under controlled humidity conditions. Appropriate storage and handling procedures must be followed during assembly.

Q: Why is the PCU9956ATWY classified as obsolete?

A: The PCU9956ATWY is no longer in active production. The PCA9956BTWY serves as the active equivalent part from NXP USA Inc., providing the same functionality with current manufacturing support.

Q: Are there any compliance or certification differences?

A: Both parts maintain identical compliance status: ROHS3 compliant, REACH unaffected, and EAR99 export classification. No compliance barriers exist for substitution.

Q: What packaging options are available for the PCA9956BTWY?

A: The PCA9956BTWY is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for different procurement and assembly workflows.