DSP56321VF240 - 240MHz 24-bit DSP, 196-MAPBGA | NXP Semiconductors
MPN: DSP56321VF240 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $130.36 | $130.36 |
| 10 | $117.32 | $1,173.20 |
| 100 | $104.28 | $10,428.00 |
| 500 | $91.25 | $45,625.00 |
| 1,000 | $78.21 | $78,210.00 |
DSP56321VF240 Overview
What is a 24-bit fixed-point DSP? A digital signal processor (DSP) is a specialized microprocessor optimized for the high-speed arithmetic demands of real-time signal processing, including audio codecs, modems, and encryption. Fixed-point DSPs represent numeric values using integer arithmetic with scaling, which delivers higher performance per MHz and lower cost than floating-point parts for many embedded workloads. The 24-bit word width in the DSP56300 family provides the dynamic range required for professional audio (24-bit PCM at 48 kHz/96 kHz) and for crypto primitives such as AES and DES. Within the broader taxonomy, the DSP56321 is a digital signal processor -> microcontroller-class SoC -> semiconductor -> integrated circuit.
Key features include 240 MHz core clock, 480 million multiply-accumulate operations per second (MMACS), 576 KB on-chip RAM, a 576-byte bootstrap ROM, and a rich peripheral set comprising a Host Interface, two Synchronous Serial Interfaces (SSI), and a Serial Communications Interface (SCI). The device also provides an external address bus, an external bus interface with instruction-cache control, and a memory-expansion area with both program RAM and instruction cache (each 24 bits x 24 bits). An integrated Address Generation Unit (AGU) and six-channel DMA engine offload the core from data-movement tasks.
Architecturally, the DSP56321 is a member of the Freescale/NXP DSP56300 family. The DSP56000-compatible instruction set enables reuse of legacy firmware, while the instruction cache and dual-memory architecture (X-data, Y-data, program memory) sustain the 1-clock-cycle throughput. The barrel shifter and hardware DO loop registers accelerate signal-processing kernels such as FIR filters, FFT butterflies, and Viterbi decoding.
Typical applications include VoIP gateways, DSL/cable modems, audio processing (mixing, equalization, sample-rate conversion), secure communications (encryption/decryption engines), industrial control DSP front-ends, and home-entertainment audio systems. The DSP56321's 480 MMACS throughput is well-matched to multi-channel audio and to security IPsec/SSL acceleration at edge rates.
When designing with the DSP56321VF240, pay close attention to the MAPBGA-196 PCB footprint (1 mm ball pitch) and to thermal management: at 240 MHz the device dissipates substantial power and requires a thermal pad and via array. The I/O voltage is 3.3 V, so level shifting is required for 1.8 V or 5 V peripherals.
This page synthesizes distributor stock levels, lifecycle status (NXP marked this part End of Life), and pin-compatible DSP56300-family alternatives - information not aggregated on a single datasheet page.
Drop-in alternatives for DSP56321VF240 — 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 DSP56321VF240 (same form factor and footprint) — differing in Mounting Type, Non-Volatile Memory, Package, RoHS Status, Serial Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSP56321VL240
✅ Drop-In✓ In Stock
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View Datasheet →DSP56321AE240
✅ Drop-In📋 Reference alternative (not in catalog)
DSP56311VF240
✅ Drop-In📋 Reference alternative (not in catalog)
DSPB56321VF240
✅ Drop-In📋 Reference alternative (not in catalog)
DSP56321BC240
✅ Drop-In📋 Reference alternative (not in catalog)
DSP56303VF240
✅ Drop-In📋 Reference alternative (not in catalog)
DSP56321VF240 Maximum Ratings & Electrical Characteristics
| Part Number | DSP56321VF240 |
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Family | DSP56300 |
| Core Type | 24-bit Fixed-Point DSP |
| Core Clock | 240 MHz |
| Performance | 480 MMACS (million multiply-accumulates per second) |
| Instruction Set | DSP56000-compatible |
| On-Chip RAM | 576 KB |
| Non-Volatile Memory | ROM 576 B (Bootstrap) |
| DMA Channels | 6 |
| Serial Interfaces | Host Interface, SSI x2, SCI |
| I/O Voltage | 3.30 V |
| Package | 196-MAPBGA (15x15 mm, 1.0 mm pitch) |
| Mounting Type | Surface Mount (BGA) |
| RoHS Status | Compliant |
| Lifecycle Status | End of Life (per NXP product page) |
| Lead-Free | Yes |
DSP56321VF240 196-mapbga (15x15 mm, 1.0 mm pitch) Pin Configuration Guide
Pin configuration for DSP56321VF240 (196-mapbga (15x15 mm, 1.0 mm pitch) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for DSP56321VF240.
Refer to the datasheet for full pin configuration.
Typical Applications
DSP56321VF240 is suitable for 6 applications: VoIP and Telephony Gateways, Audio Processing and Effects, Security and Encryption Acceleration, DSL and Cable Modem Signal Processing, Industrial Motor Control and Servo Drives, Home Entertainment and Set-Top Box Audio.
VoIP and Telephony Gateways
The DSP56321VF240's 480 MMACS throughput and dual SSI ports make it ideal for VoIP media gateways that need to process multiple G.711/G.723.1/G.729 voice channels in real time. Its 24-bit data path preserves the dynamic range needed for echo-cancellation and noise-suppression algorithms, while the 576 KB on-chip RAM is sufficient to hold codec state and per-channel buffers. Placed between the Ethernet PHY and the analog SLIC, the device runs the voice codec and signal-processing stack entirely on-chip, eliminating the need for an external DSP coprocessor.
Recommended
Audio Processing and Effects
With 480 MMACS at 240 MHz and dual SSI ports, the DSP56321VF240 comfortably handles multi-channel 24-bit/96 kHz audio mixing, parametric equalization, and dynamics processing. Its 24-bit word width matches professional audio standards (AES3) without truncation loss, and the SSI ports connect directly to common audio codecs such as the AK5394A ADC and AK4393 DAC. In a typical digital mixer implementation, the DSP56321 receives PCM frames via SSI, applies the user-defined DSP graph, and outputs processed frames to the DAC.
Recommended
Security and Encryption Acceleration
The DSP56321VF240's 24-bit ALU and 480 MMACS throughput are well matched to symmetric crypto primitives such as AES, DES/3DES, and SHA-1, achieving wire-rate IPsec/SSL acceleration for edge routers. Its six-channel DMA engine keeps cipher-block movement off the core, freeing cycles for packet inspection. The 576 KB on-chip RAM holds the key schedule and intermediate state for typical cipher modes. Place the device between the network processor's host bus and the Ethernet MAC, exposing cipher context via the Host Interface.
Recommended
DSL and Cable Modem Signal Processing
The DSP56321VF240 was specifically designed by Freescale/NXP for DSL/cable modem front-end processing, including DMT modulation, FFT/IFFT, and channel equalization. Its 240 MHz clock and 24-bit data path sustain the per-symbol sample rates required for ADSL2+ and VDSL links. The 196-MAPBGA package's 1 mm pitch fits compact CPE form factors. In a typical CPE design the DSP56321 sits between the analog front end (AFE) and the host CPU, performing all PHY-layer DSP in software.
Recommended
Industrial Motor Control and Servo Drives
The DSP56321VF240's deterministic single-cycle instruction throughput and six-channel DMA make it a strong fit for multi-axis industrial servo control, including FOC (field-oriented control) loops running at 20 kHz with sub-microsecond jitter. Its 24-bit ALU and 576 KB on-chip RAM handle the PID state and Park/Clarke transforms for three-phase motors, and the SCI port provides a simple connection to supervisory controllers. In a servo drive the DSP56321 reads current sensors via ADC, computes PWM duty cycles, and outputs to the gate driver.
Recommended
Home Entertainment and Set-Top Box Audio
Set-top boxes and AV receivers benefit from the DSP56321VF240's ability to decode multi-channel audio (Dolby Digital, DTS, MPEG) and apply room-correction equalization in real time. The dual SSI ports stream decoded PCM to HDMI audio bridges, while the Host Interface receives compressed bitstreams from the main SoC. The 196-MAPBGA package's compact 15x15 mm footprint simplifies layout in space-constrained consumer enclosures. Place the DSP56321 downstream of the main application processor as an audio co-processor.
Recommended
Recommended Products Summary
Engineering reference data for DSP56321VF240 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSP56321VL240 | DSP56321AE240 | DSP56311VF240 | DSPB56321VF240 | DSP56321BC240 | DSP56303VF240 |
|---|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 196-MAPBGA (15x15 mm, 1.0 mm pitch) | 196-MAPBGA - same | 196-MAPBGA - same | 196-MAPBGA - same | 196-MAPBGA - same | 196-MAPBGA - same | 196-MAPBGA - same |
| Core Clock | 240 MHz | 200 MHz (lower grade) | 240 MHz (same) | 240 MHz | 240 MHz (same) | 240 MHz (same) | 240 MHz |
| Performance | 480 MMACS | 400 MMACS | 480 MMACS | 480 MMACS | 480 MMACS | 480 MMACS | 480 MMACS |
| I/O Voltage | 3.30 V | 3.30 V | 3.30 V | 3.30 V | 3.30 V | 3.30 V | 3.30 V |
| Temperature Grade | Commercial (default) | Commercial | Automotive / Extended | Commercial | Commercial | Industrial | Commercial |
Key Differentiators
- DSP56000 family code compatibility (vs TI TMS320C55x DSPs)
- 196-MAPBGA compact footprint for high I/O count (vs DSP56321 in 196-pin QFP (not offered))
- On-chip 576 KB RAM eliminates external memory for typical workloads (vs TI TMS320VC5402 (16 KB on-chip RAM))
Design Notes
Estimated: at 240 MHz core clock and 1.8 V core supply, the DSP56321VF240 dissipates approximately 1.5-2.0 W in typical DSP workloads. The 196-MAPBGA package requires a thermal pad and an array of thermal vias to a copper pour on inner PCB layers to maintain junction temperature within spec. Without thermal management, sustained operation can exceed the 125 C junction limit under heavy DSP load.
The 196-MAPBGA uses a 1.0 mm ball pitch, which demands PCB fabrication with 0.4-0.5 mm laser-drilled microvias and a 4-layer stackup minimum. Use NSMD (non-solder-mask-defined) land pads with ENIG or OSP finish, and route signal traces on the breakout layer with 0.1 mm trace/space. Place 0.1 uF decoupling capacitors adjacent to each power pin and a bulk 10 uF per power rail.
Do not mix 5 V peripherals directly with the 3.3 V I/O - level translators are required. Verify the bootstrap configuration pins are pulled correctly before POR release, otherwise the device may enter an undefined mode and fail to boot. When migrating from DSP56321 to DSP56311 or DSP56303 firmware, check the memory map for peripheral-base address changes documented in the family reference manual.
Keep the external clock input (typically a 4x PLL reference) trace short and surrounded by a ground guard ring to minimize EMI. Route the Host Interface data/address bus as a matched-length group with controlled impedance (50 ohm single-ended) and place series damping resistors near the DSP. The six DMA channels can move data between any combination of SSI, SCI, Host Interface, and external memory - assign them early in the firmware to avoid conflicts.
Compliance Information
RoHS compliant per Heisener product listing. Lead-free per NXP/Freescale datasheet packaging marking. Automotive grade not qualified (AEC-Q100) for standard VF240; AE240 variant may be qualified - verify on NXP product page.
