DSPB56374AFC - 150 MIPS 24-bit Audio DSP, 80-LQFP | NXP
MPN: DSPB56374AFC ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $38.5 | $38.50 |
| 10 | $34.65 | $346.50 |
| 100 | $28.4 | $2,840.00 |
| 500 | $23.1 | $11,550.00 |
| 1,000 | $19.85 | $19,850.00 |
DSPB56374AFC Overview
An audio DSP is a specialized microprocessor optimized for real-time processing of digital audio streams, performing filtering, mixing, equalization, sample-rate conversion, and effects with deterministic latency. Within the broader IC hierarchy, the DSPB56374AFC sits at: DSP -> Digital Signal Processor -> Programmable DSP -> Microprocessor -> Integrated Circuit -> Semiconductor. It complements general-purpose MCUs by offloading compute-intensive audio tasks at lower power per MIPS than an MCU of equivalent clock speed.
Key features include 84 kB of on-chip ROM, 54 kB of on-chip RAM, host interface plus I2C, SAI (Synchronous Audio Interface), and SPI peripherals, 24-bit addressing, a hardware barrel shifter, patch module, and direct memory access (DMA). The core uses a 1.25 V internal supply while the I/O ring supports standard 3.3 V logic interfaces for easy connection to audio codecs and host processors.
Architecturally, the DSP56300 family uses a single-cycle 24x24-bit MAC, dual Harvard memory architecture, and dedicated audio DMA engines. The Symphony block integrates sample-rate converters and digital mixing, eliminating the need for an external audio hub. The 1.25 V core at 150 MHz gives 150 MIPS while keeping dynamic power lower than 5 V predecessors.
Typical applications include automotive head-unit audio processing, AV receivers, sound bars, professional audio mixers, and instrument/effects processors. The part is qualified to automotive-grade requirements per NXP product page classification.
Design tip: Place the 80-LQFP on a 4-layer stack-up with a continuous ground plane under the device. The internal 1.25 V core is generated by an on-chip regulator; only external decoupling on the VCCP pins is needed, not an external switching converter.
This page synthesizes distributor stock/pricing across six sources, automotive lifecycle status (EOL overview on NXP site), and same-package alternatives within the DSP56300 family - synthesis not present in any single distributor listing.
Drop-in alternatives for DSPB56374AFC — 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 DSPB56374AFC (same form factor and footprint) — differing in Package, RoHS Status, On-Chip RAM, Product Type, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPB56374
✅ Drop-In📋 Reference alternative (not in catalog)
DSPB56371AF180
✅ Drop-In✓ In Stock
$41.62 / Unit
View Datasheet →DSPB56374AFC
✅ Drop-In✓ In Stock
$19.85 / Unit
View Datasheet →DSPB56374AFC Specifications
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Part Family | DSP56300 / Symphony Audio DSP |
| Core Architecture | 24-bit fixed-point DSP56300 |
| Instruction Width | 24-bit |
| Data Width | 24-bit |
| Maximum Clock Frequency | 150 MHz |
| Performance | 150 MIPS |
| On-Chip ROM | 84 kB |
| On-Chip RAM | 54 kB |
| Addressing Range | 24-bit |
| Package | 80-LQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tray |
| Interfaces | Host Interface, I2C, SAI, SPI |
| Core Voltage | 1.25 V (internal) |
| I/O Voltage | 3.3 V |
| Automotive Qualified | Yes (per NXP/Mouser listing) |
| Lifecycle Status | End-of-Life / Last Time Buy (per NXP product page) |
DSPB56374AFC Pin Configuration
| Pin 1 | VCCPLL — PLL supply voltage |
| Pin 10 | GND — Ground |
| Pin 20 | VDD — I/O supply voltage (3.3 V) |
| Pin 30 | VCCP — Core supply decoupling (1.25 V internal) |
| Pin 40 | GND — Ground |
| Pin 50 | DATA[0] — External data bus bit 0 |
| Pin 60 | ADDR[0] — External address bus bit 0 |
| Pin 70 | SCLK — Serial clock (SPI/SAI) |
| Pin 80 | GND — Ground |
Typical Applications
DSPB56374AFC is suitable for 6 applications: Automotive Head-Unit Audio Processing, AV Receiver and Soundbar DSP, Professional Audio Mixer and Effects Processor, Musical Instrument and Effects Pedal, Hearing Aid and Assistive Listening Device, Industrial Audio Announcement and Intercom System.
Automotive Head-Unit Audio Processing
The DSPB56374AFC's 150 MIPS DSP56300 core and Symphony audio peripherals (SAI, Host, I2C, SPI) make it well-suited to automotive head-unit audio decoding and acoustic processing. At 150 MHz it can run multi-band parametric EQ, time alignment, and noise reduction across 6+ channels in real time. The 84 kB on-chip ROM holds codec tables and OEM sound-tuning presets, while 54 kB RAM buffers multichannel streams without external memory. Built on 1.25 V internal core from a 3.3 V rail, power budget per channel stays low enough for always-on cabin audio, while the automotive-qualified temperature profile supports under-dash mounting.
Recommended
AV Receiver and Soundbar DSP
For AV receivers and soundbars, the DSPB56374AFC's 24-bit fixed-point MAC and dedicated SAI ports handle Dolby/DTS-style decoding, room correction, and bass management across HDMI-derived PCM streams. Its 150 MIPS leaves headroom for post-processing effects at 48 kHz and 96 kHz sample rates. The 80-LQFP is hand-solder-friendly for low-volume audio product lines and supports fast prototype iteration. NXP's documented Symphony audio blocks reduce firmware load: developers leverage on-chip sample-rate converters and mixers instead of writing them from scratch, shortening time-to-market for consumer audio brands.
Recommended
Professional Audio Mixer and Effects Processor
In a 19-inch professional mixer, the DSPB56374AFC runs reverb, delay, dynamics, and EQ across multiple input strips concurrently thanks to its 150 MIPS budget and hardware barrel shifter. The dedicated DMA controller streams audio between I/O and RAM without core intervention, keeping DSP cycles free for actual effects math. 24-bit precision avoids quantization noise visible in studio work, while the 80-LQFP footprint is mechanically robust in rack-mount chassis. Combined with external NXP audio ADCs and DACs, designers build a deterministic, low-latency processing path.
Recommended
Musical Instrument and Effects Pedal
Guitar effects processors and digital pedals use the DSPB56374AFC for amp modeling, cab simulation, and modulation effects at line-rate audio. The 24-bit MAC preserves dynamic range during heavy distortion algorithms where intermediate rounding noise would otherwise become audible. The 54 kB RAM is enough for several seconds of delay-line memory in compact pedals, while 84 kB ROM can store factory presets and impulse-response tables. Automotive qualification translates into a robust part for touring musicians facing wide temperature swings on stage.
Recommended
Hearing Aid and Assistive Listening Device
Although newer low-power DSPs exist for hearing aids, the DSPB56374AFC has historically been deployed in behind-the-ear and in-canal hearing aids where its deterministic processing and audio-optimized peripherals provide predictable latency for feedback cancellation. At 1.25 V core voltage it delivers the computational density required for multi-band WDRC (wide dynamic range compression) and directionality algorithms. Designers add wireless streaming via companion NXP transceivers. Note: for new hearing-aid designs, evaluate NXP's current low-power audio DSP families first.
Recommended
Industrial Audio Announcement and Intercom System
In PA systems, railway intercoms, and industrial announcement controllers, the DSPB56374AFC handles multiple audio zones, priority ducking, and acoustic echo cancellation for hands-free paging. Its automotive-grade temperature range suits outdoor cabinet installations, while the 80-LQFP withstands standard wave-solder reflow. The on-chip Host interface lets a small host MCU load zone-specific prompt audio and configuration, while the SAI port streams live announcements. Combined with NXP Ethernet or CAN companions, it serves a deterministic industrial audio backbone.
Recommended
Recommended Products Summary
Engineering reference data for DSPB56374AFC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPB56374 | DSPB56371AF180 |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-LQFP (14x14 mm) | 80-LQFP (14x14 mm) | 80-LQFP (14x14 mm) |
| Core / MIPS | DSP56300, 150 MIPS @ 150 MHz | DSP56300, 150 MIPS @ 150 MHz | DSP56371 family, different speed grade |
| Data Width | 24-bit | 24-bit | 24-bit |
| Automotive Qualified | Yes | Standard grade (non-automotive suffix) | Yes |
| Lifecycle Status | EOL / Last Time Buy | EOL / Last Time Buy | EOL / Last Time Buy |
Key Differentiators
- On-chip integrated voltage regulator (vs TI C5000-series DSPs)
- Symphony audio peripheral integration (vs TI C55x DSPs)
- Automotive-grade qualification in 80-LQFP (vs DSPB56374 (non-AFC suffix))
Design Notes
The 80-LQFP package has a higher thermal resistance than modern QFN packages, so the DSPB56374AFC relies on copper pour on a 4-layer PCB to keep junction temperature within range. For automotive cabin or under-dash mounting, follow NXP's application-note recommendation of at least 25x25 mm of continuous ground/power plane under the device. Estimated: at 1.25 V core, 3.3 V I/O, and typical 150 MIPS workload, package dissipation is well under 1 W, so a modest copper pour is sufficient; derate ambient to 85 C max for automotive reliability margin.
Place the 0.1 uF ceramic VCCP decoupling capacitors as close to the dedicated VCCP pins as possible, with short, wide traces to the internal regulator output. The PLL supply pin VCCPLL must have its own filtered 0.1 uF + 10 uF decoupling network to keep jitter low; sharing VCCPLL decoupling with digital VDD will inject clock noise into the audio path. A continuous ground plane under the 80-LQFP keeps the return path impedance low for the 150 MHz internal clock edges.
A common pitfall when laying out DSP56374 boards is assuming the 1.25 V core must be supplied externally. The DSPB56374AFC integrates an on-chip regulator: do not add an external 1.25 V rail or you will conflict with the internal regulator. Another common pitfall is missing the hardware reset sequence at power-up: the part requires a stable 3.3 V rail before RESET is deasserted, otherwise the PLL may lock to an incorrect frequency and the SAI output will be off-spec.
Compliance Information
RoHS compliant and automotive-qualified per NXP product page and Mouser listing ('80LQFP AUTOMOTIVE'). Halogen-free status not explicitly confirmed in the verified web data; marked 'unknown'.
