RT9108NLZCP Equivalent & Substitute Parts

Part Overview

The RT9108NLZCP is a 2-channel stereo Class D amplifier IC manufactured by Richtek USA Inc., rated for 10W output per channel at 8Ω load impedance. The device operates across a supply voltage range of 8V to 25.5V and includes integrated short-circuit and thermal protection. Packaged in a 28-TSSOP surface mount configuration with exposed pad, this amplifier is designed for compact audio amplification applications.

The RT9108NLZCP has reached obsolete product status. Identifying equivalent substitute components is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this amplifier IC.

Substiute Parts

RT9108NLZCP

Richtek USA Inc.In Stock: 1111RT9108NLZCP Datasheet

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TAS5721DCAR

Texas InstrumentsIn Stock: 7215TAS5721DCAR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute components for the RT9108NLZCP are identified based on functional equivalence across critical electrical and mechanical parameters. The substitution criteria include:

Electrical Equivalence:

• Class D amplifier topology
• 2-channel stereo output configuration
• 10W output power per channel at 8Ω load impedance
• Supply voltage range compatibility (minimum 8V, maximum ≥25.5V)
• Integrated protection features (short-circuit and thermal protection)

Mechanical and Environmental Equivalence:

• Surface mount packaging technology
• Operating temperature range that encompasses or matches the original specification
• RoHS3 compliance and MSL rating compatibility
• REACH and ECCN classification alignment

The TAS5721DCAR from Texas Instruments meets these substitution criteria as a functionally equivalent 2-channel Class D amplifier with matching output power specifications and protection features.

Parameter Comparison

Engineering Selection Recommendations

The TAS5721DCAR qualifies as a functional substitute for the RT9108NLZCP based on electrical performance equivalence. Both devices deliver identical output power specifications (10W per channel at 8Ω) in a 2-channel stereo Class D configuration with matching supply voltage operating ranges and protection capabilities.

Compliance and Availability Considerations:

The TAS5721DCAR maintains ROHS3 compliance and identical MSL rating (3, 168 Hours), ensuring regulatory and manufacturing process compatibility. As an active product from Texas Instruments, the TAS5721DCAR offers superior long-term supply chain availability compared to the obsolete RT9108NLZCP.

Package Transition:

The primary design consideration involves package transition from 28-TSSOP-EP to 48-HTSSOP. This change requires PCB layout modification and footprint redesign. The 48-HTSSOP package provides additional pin count and thermal management capability through its larger form factor (0.240" width versus 0.173" width).

Operating Temperature Range:

The TAS5721DCAR operates across 0°C to 85°C, which does not extend to the -40°C lower limit of the original RT9108NLZCP. Applications requiring operation below 0°C require alternative component evaluation.

Frequently Asked Questions (FAQ)

Q: Can the TAS5721DCAR directly replace the RT9108NLZCP without PCB modification?

A: No. The TAS5721DCAR uses a 48-HTSSOP package compared to the RT9108NLZCP's 28-TSSOP-EP package. PCB footprint redesign and layout modification are required. Pin configuration and electrical connections must be verified against manufacturer datasheets before implementation.

Q: Are the electrical specifications identical between these two amplifiers?

A: Both devices deliver 10W per channel at 8Ω load in a 2-channel stereo Class D configuration. Supply voltage ranges are compatible (8V minimum, with the TAS5721DCAR extending to 26.4V maximum versus 25.5V for the RT9108NLZCP). Specific protection feature implementation details are not provided in the available data.

Q: What is the significance of the different package types?

A: The 28-TSSOP-EP is a smaller, 28-pin package with exposed pad. The 48-HTSSOP is a larger, 48-pin package. The increased pin count and package size of the TAS5721DCAR may provide enhanced thermal dissipation and additional functional features. PCB area requirements and thermal management strategies differ between packages.

Q: Is the TAS5721DCAR suitable for applications requiring -40°C operation?

A: No. The TAS5721DCAR operates from 0°C to 85°C, which does not meet the -40°C lower operating temperature of the RT9108NLZCP. Applications requiring extended low-temperature operation require alternative component selection.

Q: What is the inventory status of these components?

A: The RT9108NLZCP has 1041 pieces in stock but is obsolete. The TAS5721DCAR has 7142 pieces in stock and maintains active product status, providing superior long-term availability.

Q: Are both components RoHS3 compliant?

A: Yes. Both the RT9108NLZCP and TAS5721DCAR are ROHS3 compliant with identical MSL ratings (3, 168 Hours), ensuring compatibility with modern manufacturing and environmental regulations.