DSPB56371AF180 - 24-bit 180MHz Audio DSP | NXP | 80-LQFP
MPN: DSPB56371AF180 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $52.02 | $52.02 |
| 10 | $49.42 | $494.20 |
| 100 | $46.82 | $4,682.00 |
| 500 | $44.22 | $22,110.00 |
| 1,000 | $41.62 | $41,620.00 |
DSPB56371AF180 Overview
A digital signal processor (DSP) is a specialized microprocessor optimized for high-speed, multiply-accumulate-intensive mathematical operations such as filtering, convolution, and transform calculations. Within the signal-processing hierarchy, the DSP56371 sits in the audio DSP class beneath general application processors, descended from the DSP56300 core family that NXP (formerly Freescale Semiconductor) engineered for low power dissipation and a rich DSP instruction set for wireless, telecommunications, and multimedia products.
Key features include a 24-bit fixed-point data path, 180 MHz maximum core operation, and integrated audio-oriented peripherals designed for surround decoding. According to NXP product information, the DSP56371 supports the latest generation of audio decoders such as Dolby, THX, and DTS, and is capable of running delay management, bass management, and multi-channel audio post-processing algorithms on a single device.
The DSP56300 core architecture provides dedicated address generation units, hardware loops, and parallel move capability, which sustains high MAC throughput per clock cycle while keeping power dissipation low. This is important in multi-channel AV products where several DSP stages (decoder, post-processing, output mixing) must execute concurrently within a fixed latency budget.
Typical applications include AV receivers, home theater systems, surround sound decoders, mini stereo systems, digital TV audio systems, and automotive audio amplifiers. The 180 MHz speed grade provides headroom for newer decoder suites compared with the 150 MHz DSPB56371AF150 variant.
Design consideration: DSPB56371, DSPA56371, and DSPD56371 devices are pin-to-pin compatible, differing only in ROM code and data, so ROM selection and firmware availability must be confirmed before layout reuse. Note also that the DSPB56371AF180 is officially End of Life per NXP, so last-time-buy planning is essential.
This page synthesizes distributor pricing, drop-in alternatives, lifecycle status, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPB56371AF180 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with DSPB56371AF180 (same form factor and footprint) — differing in Package, Core, Core Architecture, Core Clock Speed, Lifecycle Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPB56371AF150
✅ Drop-In✓ In Stock
$13.9 / Unit
View Datasheet →DSPA56371AF180
✅ Drop-In✓ In Stock
$15.95 / Unit
View Datasheet →DSPD56371
✅ Drop-In📋 Reference alternative (not in catalog)
DSPB56374AFC
✅ Drop-In✓ In Stock
$19.85 / Unit
View Datasheet →DSPB56371AF180 Specifications
| Core | DSP56300 24-bit fixed-point DSP core |
| Maximum Clock Frequency | 180 MHz |
| Data Bus Width | 24 bit |
| Product Type | Audio Digital Signal Processor (DSP), blank ROM version |
| Program Memory Type | ROM (customer-coded) |
| Target Applications | AV receivers, home theater, surround decoders, digital TV audio, automotive audio |
| Decoder Support | Dolby, THX, DTS (per NXP product page) |
| Package Type | 80-LQFP (14x14 mm) |
| Package Code | QFP, square, quad gull-wing |
| Number of Terminals | 80 |
| Terminal Form | Gull wing |
| Mounting Type | Surface Mount |
| Package Body Material | Plastic/Epoxy |
| Lifecycle Status | End of Life (per NXP product page) |
DSPB56371AF180 plastic/epoxy Pin Configuration Guide
Pin configuration for DSPB56371AF180 (plastic/epoxy package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for DSPB56371AF180.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPB56371AF180 is suitable for 6 applications: AV Receivers, Home Theater in a Box (HTiB) Systems, Digital TV Audio Processing, Automotive Audio Amplifiers, Mini Stereo and Compact Audio Systems, Surround Sound Decoders (Pro/Custom Install).
AV Receivers
The DSPB56371AF180 fits AV receiver platforms because its 180 MHz 24-bit DSP56300 core provides enough MAC throughput to run full multi-channel Dolby, THX, and DTS decoder suites plus bass management, delay management, and room-equalization post-processing concurrently. According to NXP product information, the DSP56371 was explicitly designed for AV receivers and surround sound decoders supporting these decoder generations. In a typical topology, the DSP receives I2S audio from an HDMI or S/PDIF front-end, decodes the bitstream, applies speaker tuning and latency compensation, and outputs multi-channel I2S to DACs. The 180 MHz speed grade offers roughly 20% more headroom than the 150 MHz AF150, which matters when adding upmixing or newer decoder licenses. Because the part is EOL, new receiver designs should treat it as a bridge solution pending last-time-buy planning.
Recommended
Home Theater in a Box (HTiB) Systems
Home theater systems benefit from the DSP56371's single-chip integration of surround decoding and post-processing, reducing BOM cost versus discrete decoder-plus-DSP solutions. NXP's product page names home theaters among the primary DSP56371 applications, citing support for Dolby, THX, and DTS decoder suites and built-in delay and bass management. At 180 MHz in the cost-effective 80-LQFP (14x14 mm) package, one device handles bitstream decoding, speaker delay alignment for 5.1/7.1 layouts, and bass redirection to a subwoofer channel. The blank-ROM (DSPB) version lets the system manufacturer embed its licensed decoder firmware and proprietary tuning, protecting IP. Designers should note the EOL status: production HTiB programs should secure inventory or migrate to the pin-compatible DSPA56371/DSPD56371 ROM variants, which per NXP Community share the identical pin map and differ only in ROM contents.
Recommended
Digital TV Audio Processing
Digital TV audio systems use the DSP56371AF180 to decode broadcast audio (e.g., Dolby Digital in ATSC/DVB transport streams) and perform loudness management, dialog enhancement, and speaker virtualization for slim TV speakers. NXP identifies digital TV audio systems as a core DSP56371 market, and the 24-bit fixed-point datapath provides the dynamic range needed for broadcast-quality processing without floating-point cost. At 180 MHz there is adequate margin to process two to four concurrent audio channels plus post-processing within TV audio latency budgets. The device interfaces to TV SoCs via standard serial audio ports and outputs to Class-D amplifier input stages. Because broadcast loudness standards (such as dialnorm handling) are implemented in firmware, the blank-ROM DSPB variant gives TV makers full control of their certified audio stack.
Recommended
Automotive Audio Amplifiers
NXP's product description explicitly lists automotive audio systems as a DSP56371 target application. In a car audio amplifier head unit or external amp, the DSPB56371AF180 runs road-noise compensation, per-speaker equalization, time alignment, and surround decoding at up to 180 MHz, while the industrial-temperature 80-LQFP package suits under-dash thermal environments. The 24-bit datapath preserves signal integrity through the signal chain into the power amplifier stage. The blank ROM allows Tier-1 suppliers to embed their licensed decoder and tuning IP. Designers must validate the specific speed-grade and qualification data for the automotive program, as the provided data does not state AEC-Q100 qualification for this ROM variant. Given EOL status, automotive programs should verify remaining stock or plan migration to the pin-compatible DSPA/DSPD56371 ROM variants confirmed by NXP Community as pin-to-pin identical.
Recommended
Mini Stereo and Compact Audio Systems
Mini stereo systems (micro/mini Hi-Fi) leverage the DSP56371 to add value features - bass boost, virtual surround from two speakers, and MP3/WMA plus broadcast decoding - in a cost-sensitive platform. NXP names mini stereo systems among the DSP56371's target products, and the single-chip integration of decoding and post-processing at 180 MHz eliminates a separate effects processor. The 24-bit fixed-point architecture executes biquad filter banks and dynamics processing efficiently, and the 80-LQFP 14x14 mm footprint fits compact main-board layouts typical of shelf systems. The blank-ROM DSPB variant lets manufacturers ship their own certified decoder firmware. As with all DSP56371 uses, EOL lifecycle status means mini stereo programs should design around the pin-compatible family (DSPA/DSPD56371) or secure last-time-buy quantities of the AF180.
Recommended
Surround Sound Decoders (Pro/Custom Install)
Standalone surround processors and custom-installation audio controllers use the DSPB56371AF180 as the decode-and-process engine for multi-zone systems. Per NXP, the DSP56371 supports the latest generation Dolby, THX, and DTS decoders plus delay and bass management - exactly the feature set a matrix surround decoder requires. The 180 MHz core permits 7.1-channel processing with per-channel bass crossover, delay alignment up to tens of milliseconds, and room correction filters simultaneously. Its serial audio ports link to ADC front ends (multi-channel microphone or line inputs) and DAC output banks driving power amplifier modules. Custom integrators maintaining legacy installations find the pin-compatible DSPA56371/DSPD56371 variants (per NXP Community, identical pin map) a viable service-parts path, subject to ROM content verification, since NXP has placed the DSPB56371AF180 on End of Life.
Recommended
Recommended Products Summary
Engineering reference data for DSPB56371AF180 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPB56371AF150 | DSPA56371AF180 | DSPD56371 | DSPB56374AFC |
|---|---|---|---|---|---|
| Package | 80-LQFP (14x14 mm) | 80-LQFP (14x14 mm) - same | 80-LQFP (14x14 mm) - same | 80-LQFP (14x14 mm) - same | 80-LQFP (14x14 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Max Clock Frequency | 180 MHz | 150 MHz | 180 MHz | 180 MHz | 150 MHz |
| Data Path Width | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Pin Compatibility | Reference (DSP56371 family) | Pin-to-pin per NXP | Pin-to-pin per NXP Community | Pin-to-pin per NXP Community | Same package; verify pin map |
| ROM Content | Blank ROM (B variant, customer-coded) | Blank ROM (B variant) | A variant ROM (factory-coded) | D variant ROM (factory-coded) | DSP56374 family ROM - different content |
| Primary Application Focus | AV receivers, home theater, digital TV, automotive audio | Identical family target markets | Identical family target markets | Identical family target markets | Related DSP56374 audio processing |
Key Differentiators
- Top speed grade in the DSP56371 family (vs DSPB56371AF150)
- Blank ROM enables proprietary firmware embedding (vs DSPA56371AF180)
- True pin-to-pin family interchangeability (vs DSPD56371)
Design Notes
Do not exceed 180 MHz: NXP engineers confirmed via the NXP Community forum that the AF180 speed grade must not be run above 180 MHz, and the AF150 grade is capped at 150 MHz. When substituting a DSPB56371AF150 for the AF180, ensure the firmware PLL configuration targets 150 MHz, or the device will be overclocked out of specification. Also confirm the ROM variant (A/B/D) contains the decoder licenses (Dolby, DTS, THX) your product certification requires - the B variant ships blank and must be factory-programmed.
Estimated: the DSP56300 core family was designed by NXP for low power dissipation, but the DSPB56371AF180's exact supply voltage and typical core current are not stated in the provided data (marked [DATA_NEEDED]). Consult the DSP56371 datasheet power-supply chapter before finalizing the regulator sizing. Provide separate clean supply domains for core and I/O with local decoupling (100 nF per power pin plus bulk 10 uF), and verify the PCB power-plane impedance supports transient currents during simultaneous MAC and I/O activity.
The 80-LQFP (14x14 mm) gull-wing package requires a standard 0.5 mm pitch land pattern; verify the footprint against the DSP56371 datasheet mechanical drawing before release. Because DSPA/B/D56371 are pin-to-pin compatible per NXP, design one footprint that accommodates the full family to preserve second-source flexibility for last-time-buy planning. Keep the serial audio (I2S-style) traces short and length-matched within a channel group to minimize inter-channel skew in multi-channel output.
Compliance Information
Compliance status not stated in the provided web data. NXP product page lists an Environmental Quality section for DSPB56371AF180 - consult nxp.com/part/DSPB56371AF180 for authoritative RoHS/REACH details.
