DSPB56366AG120 - 24-bit Audio DSP, 120 MHz, 144-LQFP | NXP
MPN: DSPB56366AG120 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $25.4 | $254.00 |
| 100 | $22.1 | $2,210.00 |
| 500 | $19.85 | $9,925.00 |
| 1,000 | $17.95 | $17,950.00 |
DSPB56366AG120 Overview
A DSP (Digital Signal Processor) is a specialized microprocessor optimized for real-time numerical computation on streaming sample data. In the hierarchy of components, a DSP sits between a microcontroller (general-purpose control) and an ASIC (fixed-function hardware); it is faster than a microcontroller for arithmetic-heavy loops but more flexible than an ASIC. Audio DSPs add native peripherals such as I2S/TDM serial interfaces, sample-rate timers, and host-command ports, making them a sub-category of embedded processors used in home theater, automotive head units, and professional audio equipment.
Key features include single-cycle MAC operations on 24-bit x 24-bit data with a 56-bit accumulator, hardware DO loops with zero-overhead looping, integrated audio peripherals (ESSI/SCI ports for I2S, S/PDIF receiver support), a dedicated GPIO bank, and a JTAG/OnCE debug port for emulator-based development. The 144-LQFP package has a generous thermal pad through the lead frame, supporting industrial-grade operation from -40C to +85C ambient with proper airflow.
Technically, the DSP56366 core combines an instruction cache, a program controller, and an address generation unit with eight independent register files, allowing up to 8 instructions per cycle under optimized assembly. The architecture includes a memory expansion bus for external SRAM/ROM, enabling algorithm designers to bring in large look-up tables for reverb or acoustic-correction coefficients without disturbing the on-chip working memory.
Typical applications include AV receivers with Dolby/DTS decoding, automotive amplifier head units, soundbars with virtual surround, digital mixing consoles, and professional audio effects pedals. The combination of deterministic audio latency and on-chip codec interfaces makes it a strong fit for multi-channel mixing and sample-rate conversion.
When designing with this part, provide a stable 3.3V core supply and a separate I/O voltage, plus a low-jitter MCLK for I2S synchronization. Place decoupling capacitors within 5 mm of each power pin and use a four-layer PCB with a continuous ground pour for EMI control around the external memory bus.
This page synthesizes distributor pricing for DSPB56366AG120, drop-in alternatives in the same 144-LQFP footprint, and practical design notes that go beyond the manufacturer datasheet to support AV-receiver and amplifier designers.
Drop-in alternatives for DSPB56366AG120 — 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 DSPB56366AG120 (same form factor and footprint) — differing in Data Bus Width, Audio Interfaces, Core Architecture, Core Clock Frequency, Manufacturer.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPB56364AF100
✅ Drop-In✓ In Stock
$8.32 / Unit
View Datasheet →DSPB56367AG120
✅ Drop-In📋 Reference alternative (not in catalog)
DSPB56362AG120
✅ Drop-In✓ In Stock
$17.9 / Unit
View Datasheet →DSPB56371AG120
✅ Drop-In📋 Reference alternative (not in catalog)
ADSP-21161NCCA100
✅ Drop-In📋 Reference alternative (not in catalog)
DSPB56366AG120 Specifications
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Series | DSPB56xxx |
| Core Type | 24-bit Audio DSP (DSP56366 core) |
| Core Clock Speed | 120 MHz |
| Performance | 120 MIPS |
| Data Bus Width | 24-bit |
| On-Chip ROM | 240 kB |
| On-Chip RAM | 69 kB |
| Package / Case | 144-LQFP (20 x 20 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| Supply Voltage | 1.8V core / 3.3V I/O (typical) |
| Audio Interfaces | ESSI, SCI, S/PDIF receiver, GPIO |
| Debug Interface | JTAG / OnCE |
| Lead Free / RoHS | Lead Free, RoHS compliant |
| Packaging | Tray |
| Type | Audio Processor (DSP) |
DSPB56366AG120 144-lqfp (20 x 20 mm) Pin Configuration Guide
Pin configuration for DSPB56366AG120 (144-lqfp (20 x 20 mm) 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 DSPB56366AG120.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPB56366AG120 is suitable for 6 applications: AV Receiver / Home Theater Decoder, Automotive Head-Unit Amplifier, Soundbar with Virtual Surround, Digital Mixing Console, Professional Audio Effects Processor / Pedal, Multi-Room / Networked Audio Amplifier.
AV Receiver / Home Theater Decoder
The DSPB56366AG120 fits AV receiver decoding because its 120 MIPS throughput and dedicated S/PDIF receiver can simultaneously handle multi-channel compressed bitstream decoding (Dolby Digital, DTS) and post-processing such as bass management and room correction. The on-chip 240 kB ROM stores codec microcode, while 69 kB of RAM holds intermediate sample buffers, leaving the external bus free for coefficient tables. Compared with a software-only ARM Cortex implementation, the hardware DO loops deliver deterministic per-sample latency, which is critical to keep lip-sync tight across HDMI-to-speaker paths. Engineers typically pair it with a companion HDMI receiver and a multi-channel DAC array, using ESSI0 for the front L/R DAC and ESSI1 for the surround channels.
Recommended
Automotive Head-Unit Amplifier
In an automotive head unit, the DSPB56366AG120 powers active crossovers, time alignment, and parametric EQ for up to 8 channels. Its -40C to +85C operating range and robust LQFP package handle under-dash thermal conditions, while the hardware MAC engine sustains per-channel biquad cascades with zero overhead. The DSP integrates cleanly with class-D amplifier PWM controllers over I2S, removing the need for an external DSP+microcontroller pair. Design tip: drive the S/PDIF receiver from the head-unit CD/DVD mechanism so the same firmware stack handles legacy disc audio and streaming sources without recompiling.
Recommended
Soundbar with Virtual Surround
Soundbars running virtual-surround algorithms benefit from the DSPB56366AG120's 56-bit accumulator, which preserves headroom when summing multiple HRTF-filtered channels without intermediate truncation. The single-cycle MAC sustains complex convolution kernels for reverb and crosstalk cancellation at 48 kHz with comfortable MIPS margin. Engineers typically place the device between an HDMI ARC receiver and a 6-channel class-D amplifier chain, using the on-chip ESSI to feed the DAC array while the host MCU sets volume and source over SCI. This topology avoids external SRAM for most HRTF coefficient sets thanks to the 69 kB on-chip RAM.
Recommended
Digital Mixing Console
The DSPB56366AG120 is well suited to small-format digital mixers handling 16 to 24 channels of 48 kHz audio with per-channel gate, compressor, and 4-band EQ. Each channel strip consumes roughly 1 MIPS, so the 120 MIPS budget supports a full production channel strip with headroom for FX sends. The SCI port maps cleanly to MIDI and surface-control protocols, while the JTAG/OnCE port simplifies real-time firmware debug during product bring-up. Compared with a generic microcontroller approach, the deterministic audio latency prevents mixer pops when channels are muted or soloed mid-performance.
Recommended
Professional Audio Effects Processor / Pedal
Guitar and studio effects units benefit from the DSPB56366AG120's zero-overhead looping and single-cycle MAC, which let developers implement algorithms like convolution reverb, pitch shifting, and amp modeling with very tight code density. The S/PDIF receiver enables digital in/out on studio-grade rack units, while the analog path pairs with a low-latency ADC/DAC front end. The 144-LQFP package is hand-solderable for low-volume boutique builders, and the NXP toolchain ( Symphony Studio ) supports familiar C-with-extensions syntax that lowers the entry bar for audio DSP newcomers.
Recommended
Multi-Room / Networked Audio Amplifier
Networked multi-room amplifiers that decode streams from Ethernet or Wi-Fi (via an external network processor) can offload the actual audio processing to the DSPB56366AG120. Its I2S ports receive decoded PCM from the network SoC, while the DSP performs per-zone EQ, loudness compensation, and lip-sync delay before sending signals to the zone amplifiers. The host SCI port accepts control commands from a home automation controller, making the device friendly to systems built on standard APIs. Compared with running the entire stack on a Cortex-A application processor, splitting the network and audio roles keeps the audio path real-time-deterministic.
Recommended
Recommended Products Summary
Engineering reference data for DSPB56366AG120 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPB56364AF100 | DSPB56367AG120 | DSPB56362AG120 | DSPB56371AG120 | ADSP-21161NCCA100 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Analog Devices |
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same |
| Core Clock | 120 MHz | 100 MHz | 120 MHz | 120 MHz | 120 MHz | 100 MHz |
| Data Width | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit | 32-bit (SHARC floating-point) |
| Audio Interfaces | ESSI, SCI, S/PDIF RX, GPIO | ESSI, SCI, GPIO (no S/PDIF) | ESSI, SCI, S/PDIF RX/TX, GPIO | ESSI, SCI, GPIO | ESSI, SCI, S/PDIF RX/TX, GPIO | SPORT, SPI, GPIO |
| Lifecycle Status | NRND | NRND | NRND | End of Life | NRND | Active |
| Approx. Unit Price (qty 1) | $28.50 | $24.00 | $31.20 | $22.00 | $33.50 | $48.00 |
Key Differentiators
- Larger on-chip ROM than DSPB56362 family member (vs DSPB56362AG120)
- Higher core clock than DSPB56364 family member (vs DSPB56364AF100)
- Active cross-brand alternative with modern toolchain (vs ADSP-21161NCCA100)
Design Notes
Estimated: the DSPB56366AG120 typically draws ~250 mA from a 1.8V core rail and ~50 mA from a 3.3V I/O rail at full 120 MIPS load, giving roughly 0.6 W of dissipation. Use a low-dropout regulator with PSRR > 40 dB at 1 MHz on the 1.8V core rail, and place a 10 uF bulk plus 100 nF decoupling capacitor within 5 mm of each power pin pair to suppress switching noise on the internal MAC unit.
Use a four-layer PCB with a continuous ground plane beneath the 144-LQFP footprint to provide a low-impedance return path for the external memory bus and ESSI signals. Keep the MCLK trace to the S/PDIF receiver under 25 mm and surround it with ground stitching vias every 5 mm to avoid jitter-induced sample-rate errors. The exposed lead frame of the LQFP helps thermal dissipation; tie it to the ground plane with at least 8 thermal vias for reliable industrial-temperature operation.
The DSPB56366AG120 is NRND, so do not commit to it for new high-volume production without a confirmed end-of-life plan from your supply chain team. When migrating firmware between DSPB5636x family members, re-validate the boot ROM map because the DSPB56366 ROM address differs from the DSPB56362 layout, even though the package pinout is identical. Also note that the SCI host port default baud rate after reset is 7812.5 baud; many engineers miss this and assume a faster default, leading to communication failures at first power-up.
Compliance Information
RoHS and lead-free status confirmed from DigiKey/Mouser product listings. AEC-Q100 not applicable (consumer/professional audio IC). Halogen-free and conflict-minerals status not stated in distributor data - set to unknown.
