TDF8546TH/N2,118 Equivalent & Substitute Parts

Part Overview

The TDF8546TH/N2,118 is a quad-channel Class AB audio amplifier IC manufactured by NXP USA Inc., designed for high-power audio applications. This device integrates four independent 64W amplifier channels at 2Ohm load impedance within a 36-HSOP surface mount package. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain functional compatibility through matching package geometry, supply voltage range, channel configuration, and core protection features.

Substiute Parts

TDF8546TH/N2,118

NXP USA Inc.In Stock: 8753TDF8546TH/N2,118 Datasheet

Current PartRFQ

TDF8546TH/N2ZJ

NXP USA Inc.In Stock: 1000241TDF8546TH/N2ZJ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TDF8546TH/N2,118 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Manufacturer: NXP USA Inc.
• Package / Case: 36-BSSOP with exposed pad geometry
• Supplier Device Package: 36-HSOP
• Output Configuration: 4-Channel (Quad) Class AB topology
• Voltage - Supply Range: 6V ~ 18V compatibility
• Mounting Type: Surface Mount
• RoHS3 Compliance and REACH Unaffected status

Allowable Variation:

• Max Output Power per channel may differ based on load impedance specification
• Feature set may be reduced (subset of protection features acceptable)
• Product Status transition from Obsolete to Active is acceptable

The TDF8546TH/N2ZJ qualifies as a direct substitute based on identical package geometry, matching supply voltage range, identical quad-channel configuration, and equivalent RoHS/REACH compliance. Output power specification differs due to load impedance rating (25W @ 4Ohm versus 64W @ 2Ohm), reflecting design variation within the same product family.

Parameter Comparison

Engineering Selection Recommendations

The TDF8546TH/N2ZJ is the qualified substitute for the obsolete TDF8546TH/N2,118. Selection is based on the following engineering criteria:

Compliance & Regulatory: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying environmental and regulatory requirements for current production.

Product Status: The substitute part holds Active status, ensuring ongoing availability and manufacturing support from NXP USA Inc., whereas the main part is classified as Obsolete.

Package & Mechanical Compatibility: Identical 36-BSSOP package geometry with exposed pad and 36-HSOP supplier device package ensures direct PCB layout compatibility without redesign.

Electrical Compatibility: Matching 6V ~ 18V supply voltage range and quad-channel Class AB configuration maintain circuit-level compatibility. Output power specification differs based on load impedance; applications requiring 64W @ 2Ohm operation must evaluate whether 25W @ 4Ohm performance meets system requirements.

Feature Set: The substitute part includes Short-Circuit and Thermal Protection features. The main part includes additional Depop, I2C, Mute, and Standby features. Applications dependent on these additional features require functional verification.

Frequently Asked Questions (FAQ)

Q: Can TDF8546TH/N2ZJ directly replace TDF8546TH/N2,118 on existing PCBs?

A: Yes, from a mechanical and package perspective. Both parts use identical 36-BSSOP package geometry with exposed pad. No PCB layout modifications are required. Electrical compatibility depends on application load impedance and feature requirements.

Q: What is the difference in output power between these parts?

A: TDF8546TH/N2,118 delivers 64W per channel at 2Ohm load impedance. TDF8546TH/N2ZJ delivers 25W per channel at 4Ohm load impedance. The difference reflects design variation within the same product family and load impedance specification. Applications must confirm that the substitute part's power rating meets system requirements.

Q: Are there feature differences between these parts?

A: Yes. TDF8546TH/N2,118 includes Depop, I2C, Mute, Short-Circuit and Thermal Protection, and Standby features. TDF8546TH/N2ZJ includes Short-Circuit and Thermal Protection features. Applications requiring I2C control, Mute functionality, or Depop capability must evaluate whether the substitute part's reduced feature set is acceptable.

Q: Why is the main part classified as Obsolete?

A: Product status reflects NXP USA Inc.'s manufacturing and support lifecycle. Obsolete classification indicates the part is no longer in active production. The substitute part maintains Active status, ensuring continued availability and manufacturing support.

Q: Are both parts RoHS3 compliant?

A: Yes. Both TDF8546TH/N2,118 and TDF8546TH/N2ZJ are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status.

Q: What supply voltage range do these parts support?

A: Both parts operate across 6V ~ 18V supply voltage range, ensuring compatibility with standard audio amplifier power supply designs.

Q: Is the 36-HSOP package the same as 36-BSSOP?

A: 36-HSOP is the supplier device package designation. 36-BSSOP (0.433", 11.00mm Width) Exposed Pad is the standardized package case specification. Both designations refer to the same physical package used by both parts.