DSPB56371AF150 - 24-Bit 150MHz Audio DSP | NXP
MPN: DSPB56371AF150 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $17.2 | $172.00 |
| 100 | $15.8 | $1,580.00 |
| 500 | $14.6 | $7,300.00 |
| 1,000 | $13.9 | $13,900.00 |
DSPB56371AF150 Overview
A digital signal processor is a specialized microprocessor whose architecture is optimized for the fast, repetitive mathematical operations used in real-time signal processing, such as filtering, decoding, and matrixing of digital audio streams. Within the system hierarchy, the DSP56371 sits between general-purpose MCUs and dedicated audio codecs: it is an embedded processor within the DSP56300 (56000 core) family of audio and communications signal processors.
Key features include the 24-bit fixed-point 56000 core, integrated audio peripherals, and decoder support for the latest generation surround formats including Dolby, THX, and DTS. The device can run delay management, bass management, tone control, and multi-channel surround decode workloads concurrently on a single chip, reducing bill-of-materials cost in consumer and automotive audio designs.
Architecturally, the DSP56371 builds on the proven DSP56300 core with a Harvard memory architecture and on-chip memories sized for decoder application firmware. Its instruction set supports 24-bit data words, which natively match audio sample widths and avoid truncation error in filter banks and mixer paths.
Typical applications include audio/video (AV) receivers, home theater and surround sound decoders, mini stereo systems, digital TV audio subsystems, and automotive audio amplifiers. In each case the chip decodes, post-processes, and outputs multi-channel PCM streams.
Design consideration: NXP has marked this part End of Life, so new designs should secure stock via last-time-buy channels such as Rochester Electronics or plan a firmware migration path to current NXP audio DSP families.
This page synthesizes distributor availability, drop-in alternatives, lifecycle status, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPB56371AF150 — 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 DSPB56371AF150 (same form factor and footprint) — differing in Package, Core, Product Type, Core Clock Frequency, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPB56371AF180
✅ Drop-In✓ In Stock
$41.62 / Unit
View Datasheet →DSPB56371AF150
✅ Drop-In✓ In Stock
$13.9 / Unit
View Datasheet →DSPB56374AF150
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPB56371AF150 Specifications
| Core | DSP56000 (56000) 24-bit fixed-point |
| Product Series | DSP56371 (DSPB371) |
| Core Clock Frequency | 150 MHz |
| Processing Performance | 150 MIPS |
| Data Bus Width | 24 bit |
| Number Type | Fixed-Point |
| Application Target | Audio Processor (AV receivers, home theater, automotive audio) |
| Audio Decoder Support | Dolby, THX, DTS surround decoders |
| Package | 80-LQFP (14x14 mm), QFP80 square, 0.65 mm pitch (gull-wing terminals) |
| Number of Terminals | 80 |
| Mounting Type | Surface Mount |
| Packaging | Tray |
| Manufacturer Status | End of Life (replacement/PCN documentation available via NXP) |
DSPB56371AF150 80-lqfp (14x14 mm), qfp80 square, 0.65 mm pitch (gull-wing terminals) Pin Configuration Guide
Pin configuration for DSPB56371AF150 (80-lqfp (14x14 mm), qfp80 square, 0.65 mm pitch (gull-wing terminals) 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 DSPB56371AF150.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPB56371AF150 is suitable for 6 applications: AV Receiver and Home Theater, Surround Sound Decoder Boards, Automotive Audio Amplifiers, Digital TV Audio Processing, Mini Stereo Systems, Professional Multi-Channel Audio Interfaces.
AV Receiver and Home Theater
The DSPB56371AF150 was designed specifically as the multi-channel decode engine for AV receivers and home theater systems. Its 24-bit fixed-point 56000 core at 150 MHz (150 MIPS) provides enough headroom to run Dolby, THX, and DTS surround decoders concurrently with delay management and bass management post-processing. In a typical topology, an HDMI or S/PDIF front-end streams compressed audio into the DSP over its serial audio ports; the DSPB56371 decodes to multi-channel PCM, applies room and channel EQ, and outputs via multiple SAI ports to DACs. Using one chip for decode plus post-processing removes a second processor from the BOM, a primary design goal NXP stated for the DSP56371 family.
Recommended
Surround Sound Decoder Boards
Standalone surround decoder modules rely on the DSPB56371AF150 because it natively supports the latest generation decoders including Dolby, THX, and DTS per the NXP product description. The 24-bit data word width matches audio sample precision without truncation error in filter banks, while 150 MIPS sustains full 5.1/7.1 decode plus re-equalization and bass redirection. The DSP typically boots decoder firmware from external memory, decodes the incoming bitstream, and feeds eight-channel PCM to audio DACs over serial interfaces. For decoder boards already in production, the DSPB56371AF180 offers the same footprint with 20% more clock margin, useful when adding newer decoder license versions that demand more MIPS.
Recommended
Automotive Audio Amplifiers
NXP explicitly targets automotive audio systems with the DSP56371 family. In car amplifiers and head units, the DSPB56371AF150 handles decode of Dolby and DTS streams plus per-channel delay alignment (for speaker positions) and bass management, all at 150 MHz. Its fixed-point 24-bit architecture keeps quantization noise below the audibility threshold through cascaded biquad filter chains. A key consideration for automotive use is lifecycle: the device is End of Life at NXP, so new automotive platforms should design in the DSPB56371AF180 or a supported part, while existing programs should secure last-time-buy volume through authorized reproduction channels such as Rochester Electronics before open-market stock tightens.
Recommended
Digital TV Audio Processing
Digital TV audio subsystems use the DSPB56371AF150 to decode broadcast audio formats and drive TV speaker or external output paths. The 150 MHz, 150 MIPS 56000 core decodes compressed surround bitstreams and performs level management, delay compensation for lip-sync alignment, and tone processing in a single chip, which NXP lists as a target market. Audio arrives over serial inputs from the TV SoC and exits to DACs; the 24-bit data path preserves dynamic range through the processing chain. Because the part is EOL, TV platform teams maintaining legacy models should qualify DSPB56371AF180 as a service replacement, since it is footprint-identical and firmware-compatible at the same or higher clock.
Recommended
Mini Stereo Systems
Compact mini and micro stereo systems benefit from the DSPB56371AF150's integration: one 80-LQFP chip performs DTS/Dolby decode, bass management, and tone control, replacing multiple dedicated audio ICs in a cost-sensitive platform. The 150 MHz core easily sustains stereo and 5.1 workloads with MIPS to spare for user-effect processing such as virtual surround widening. Its 14x14 mm LQFP footprint fits the small main PCBs typical of shelf systems. Designers should note the EOL status and plan sourcing: remaining authorized stock flows through Rochester Electronics reproduction, and the DSPB56371AF180 variant remains the first-choice functional substitute for any service or continuing build.
Recommended
Professional Multi-Channel Audio Interfaces
Beyond consumer AV, the DSP56371 architecture suits pro-audio and installed-sound processor boards that need deterministic fixed-point filtering: crossovers, delay lines, and limiting at 24-bit precision with 150 MIPS of budget at 150 MHz. The DSPB56371AF150 streams multi-channel I2S to and from converters while a host MCU manages control, a classic DSP56300 partition. For这类 designs the verified parametric data is limited, so confirm memory sizes and supply voltage from the official NXP datasheet before layout. Given EOL status, new pro-audio designs should prefer DSPB56371AF180 for longevity margin or a supported DSP family, keeping the AF150 for legacy service boards only.
Recommended
Recommended Products Summary
Engineering reference data for DSPB56371AF150 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPB56371AF180 | DSPB56371AF150 (Rochester reproduction) | DSPB56374AF150 |
|---|---|---|---|---|
| Package | 80-LQFP (14x14 mm) | 80-LQFP (14x14 mm) - same | 80-LQFP (14x14 mm) - same | 80-LQFP (14x14 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | Rochester Electronics (authorized reproduction of NXP die) | NXP Semiconductors |
| Core / Architecture | 56000 (DSP56300), 24-bit fixed-point | 56000 (DSP56300), 24-bit fixed-point | 56000 (DSP56300), 24-bit fixed-point | 56000 (DSP56300), 24-bit fixed-point + AES3 I/O |
| Core Clock | 150 MHz | 180 MHz | 150 MHz | 150 MHz |
| Performance | 150 MIPS | 180 MIPS | 150 MIPS | 150 MIPS |
| Data Bus Width | 24 bit | 24 bit | 24 bit | 24 bit |
| Target Application | AV receivers, home theater, surround decoders, digital TV, automotive audio | Same audio targets, more decode headroom | Identical application fit (same device) | Same audio targets plus digital audio I/O |
Key Differentiators
- Audio-dedicated 24-bit fixed-point architecture (vs Generic MCUs or general-purpose DSPs)
- Integrated decoder ecosystem support (vs DSPB56374AF150)
- Footprint-compatible speed upgrade path (vs DSPB56371AF180)
- Honest trade-off: End of Life (vs Current-generation audio DSPs)
Design Notes
Treat lifecycle as a first-class design constraint. NXP has formally marked the DSPB56371AF150 End of Life with discontinuance and product change notices published. Any new production order should be placed through Rochester Electronics (licensed reproduction, listed on DigiKey Marketplace) or secured as a last-time-buy from excess-inventory distributors. Octopart tracks 6 distributors carrying the part; expect EOL price volatility and tray-only packaging.
The 80-LQFP (14x14 mm, 0.65 mm pitch, gull-wing) footprint is shared across DSP56371 speed grades, so lay out the board to accept both DSPB56371AF150 and DSPB56371AF180. Keep serial audio port traces to DACs/ADCs short and length-tolerant (I2S-class rates are not demanding), and provide solid decoupling at each supply pin pair with 100 nF ceramics plus bulk capacitance near the device. Confirm exact supply pin assignments and voltage levels from the official NXP datasheet before finalizing the power tree.
As a fixed-point 24-bit audio DSP, the DSPB56371 decode quality depends on clean clocking: feed the DSP and the audio ADC/DAC chain from a common low-jitter master clock (or derive them from the same source) to avoid sample slips that manifest as clicks in decoded Dolby/DTS streams. Verify firmware was validated at the exact core clock (150 MHz for AF150, 180 MHz for AF180); running AF150 firmware timing loops on the AF180 without re-checking peripheral divider settings is a common migration error.
Compliance Information
Compliance details are not conclusively stated in the verified data for this EOL part; request the official NXP material declaration or Rochester Electronics compliance sheet.
