DSP56854FGE - 16-bit DSP Controller, 120 MIPS, 32KB SRAM | NXP
MPN: DSP56854FGE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $25.2 | $252.00 |
| 100 | $21.75 | $2,175.00 |
| 500 | $18.4 | $9,200.00 |
| 1,000 | $15.95 | $15,950.00 |
DSP56854FGE Overview
A Digital Signal Controller (DSC) is a hybrid device that combines the processing throughput of a Digital Signal Processor (DSP) with the peripheral integration and ease-of-use of a microcontroller (MCU). Sitting between MCUs (which favor control loops and I/O) and standalone DSPs (which favor numeric throughput), DSCs are commonly classified under the broader semiconductor hierarchy: DSC -> microcontroller -> embedded processor -> integrated circuit. Engineers choose a DSC when a project needs both deterministic interrupt-driven control and fast signal-processing math on a single die.
Key features of the DSP56854FGE include six independent DMA channels, two Enhanced Synchronous Serial Interfaces (ESSI), a Serial Peripheral Interface (SPI), a Serial Communications Interface (SCI), a JTAG/OnCE debug port, six PWM channels with input capture, four 16-bit timers, an external memory interface with chip-select logic, and a low-power HALT/STOP mode. The 56800E core uses a dual Harvard-style architecture supporting 16-bit x 16-bit parallel MAC in a single cycle, providing efficient fixed-point arithmetic for control-loop and audio processing.
Typical applications include digital motor control (BLDC, PMSM, AC induction), uninterruptible power supplies (UPS), telecom data modems and teledatacom devices, digital audio processing, Internet appliances, point-of-sale terminals, and general industrial automation. The 120 MHz core plus six-channel PWM and six DMA channels make it especially well-suited to closed-loop field-oriented control (FOC) of three-phase motors.
When designing with the DSP56854FGE, plan the PCB layout around the external memory bus; route address and data lines length-matched and keep the analog AVSS/VDD pair decoupled with 100 nF plus 10 uF bulk capacitors to minimize substrate noise coupling into the ADC inputs.
Drop-in alternatives for DSP56854FGE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSP56858FGE
✅ Drop-In📋 Reference alternative (not in catalog)
DSP56F8366
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSP56F8376
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSP56854FGE Maximum Ratings & Electrical Characteristics
| Core Architecture | 56800E 16-bit DSP controller |
| Data Bus Width | 16 bit |
| Program Memory Type | 16-bit SRAM (external up to 2M words) |
| Data Memory Type | 16-bit SRAM (external up to 8M words) |
| Internal Program SRAM | 16K x 16-bit |
| Internal Data SRAM | 16K x 16-bit |
| Boot ROM | 16-bit |
| Total Internal SRAM | 32 KB (16K x 16) |
| Maximum Clock Frequency | 120 MHz |
| Performance | 120 MIPS |
| DMA Channels | 6 independent |
| Enhanced Synchronous Serial Interfaces (ESSI) | 2 |
| Serial Peripheral Interface (SPI) | 1 |
| Serial Communications Interface (SCI) | 1 |
| PWM Channels | 6 |
| Timers | 4 x 16-bit |
| External Memory Bus | Glue-less chip-select interface to ROM/SRAM |
| Package | 128-LQFP (14x20 mm) |
| Mounting Type | Surface Mount |
| Process Technology | High-density CMOS, 5V-tolerant TTL-compatible I/O |
DSP56854FGE 128-lqfp (14x20 mm) Pin Configuration Guide
Pin configuration for DSP56854FGE (128-lqfp (14x20 mm) 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 DSP56854FGE.
Refer to the datasheet for full pin configuration.
Typical Applications
DSP56854FGE is suitable for 6 applications: Three-Phase BLDC/PMSM Motor Control, Digital Audio Processing, Teledatacom and Modem Devices, Uninterruptible Power Supplies (UPS), Internet Appliances and Embedded Networking, Point-of-Sale Terminals and Industrial Controllers.
Three-Phase BLDC/PMSM Motor Control
The NXP DSP56854FGE is widely used for digital motor control of three-phase BLDC, PMSM, and AC induction drives in industrial and appliance products. Its 120 MIPS 56800E core executes a single-cycle 16x16 MAC, which is fast enough to close a field-oriented control (FOC) loop on a 20 us update rate while leaving headroom for current, speed, and position estimators. The six PWM channels pair with the on-chip ADC and six DMA channels to drive a complete three-phase inverter plus DC-bus current and back-EMF sensing with deterministic latency. Compared with a generic Cortex-M MCU of equal cost the DSP56854FGE delivers stronger numerical throughput and a richer peripheral set in the same 128-LQFP footprint.
Recommended
Digital Audio Processing
Engineers choose the DSP56854FGE for audio products that require fixed-point DSP performance on a single chip, such as effects units, mixers, equalizers, and consumer audio appliances. The 56800E core sustains 16-bit MACs at 120 MHz, enabling real-time biquad cascades, FFTs, and adaptive filters well above 48 kHz sample rates. Its two Enhanced Synchronous Serial Interfaces (ESSI) connect to common audio CODECs, while DMA offloads buffer movement so the core stays focused on DSP code. Designers migrating from legacy Motorola DSP56000 parts gain an easy software port because the 56800E retains the same Harvard-style architecture.
Recommended
Teledatacom and Modem Devices
The DSP56854FGE was specifically designed for teledatacom and Internet-appliance workloads, providing the serial interfaces (ESSI/SPI/SCI) and glue-less external memory bus needed for modem protocol stacks. Its 120 MIPS of fixed-point throughput handles V.90, V.92, G.711/G.726 codecs, and proprietary modulation schemes in a single chip without external DSP support. The 32 KB internal SRAM plus 8 MB external data memory headroom are well matched to the working set of typical modem DSP kernels. Production designs combining this DSC with a companion analog front-end IC can deliver full-duplex data plus voice feature sets.
Recommended
Uninterruptible Power Supplies (UPS)
In UPS and inverter applications the DSP56854FGE runs the digital control loops that regulate sine-wave output, current sharing, and battery management. The 56800E core can execute PID + state-machine control at sample rates of 16 to 32 kHz, producing tightly regulated output even under step loads. With six PWM channels the controller drives both the inverter bridge and auxiliary converters, while the on-chip ADC samples input/output voltage and current. Industrial UPS designs appreciate the deterministic JTAG/OnCE debug port for fast bring-up of safety-critical firmware.
Recommended
Internet Appliances and Embedded Networking
Home gateway, set-top box, and Internet-appliance designs use the DSP56854FGE as the main system controller when they need both fast busses for media processing and traditional MCU peripherals. The glue-less external memory interface supports DRAM or flash ROM, allowing the firmware image to grow beyond the on-chip 32 KB SRAM. The two ESSIs and SCI give a designer three UART-class links, which is enough to bridge Ethernet, modem, and user-interface subsystems simultaneously. Designers often pair the DSC with an external Ethernet MAC for networked embedded products.
Recommended
Point-of-Sale Terminals and Industrial Controllers
Point-of-sale terminals and industrial controllers rely on the DSP56854FGE for combined transaction processing and signal-conditioning tasks. Its 120 MIPS core handles encryption, debit-mag-strip decoding, and printhouse control loops while the timers, PWMs, and SCI/ESSI handle keypad, printer, and cash-drawer peripherals. The robust 128-LQFP package with 0.5 mm pitch is well suited to industrial-temperature boards and easy rework paths in field-serviceable designs. Long-term availability through Rochester Electronics extends life for installed terminal fleets.
Recommended
Recommended Products Summary
Engineering reference data for DSP56854FGE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSP56858FGE | DSP56F8366 | DSP56F8376 |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 128-LQFP (14x20 mm) | 128-LQFP (14x20 mm) - same | 128-LQFP (14x20 mm) - same | 128-LQFP (14x20 mm) - same |
| Core Architecture | 56800E 16-bit DSC | 56800E 16-bit DSC | 56800E 16-bit DSC | 56800E 16-bit DSC |
| Max Clock Frequency | 120 MHz | 120 MHz | 60 MHz | 80 MHz |
| MIPS | 120 MIPS | 120 MIPS | 60 MIPS | 80 MIPS |
| Internal SRAM | 32 KB (16K x 16 program + 16K x 16 data) | 48 KB | 16 KB | 32 KB |
| DMA Channels | 6 | 6 | 4 | 6 |
| PWM Channels | 6 | 6 | 6 | 6 |
| External Memory Interface | Glue-less chip-select to 2M program / 8M data | Glue-less chip-select to 2M program / 8M data | Glue-less chip-select | Glue-less chip-select |
Key Differentiators
- Balanced DSP+MCU core with rich peripheral set (vs DSP56F8366)
- Larger internal SRAM and more DMA channels (vs DSP56F8366)
- Same family upgrade path within NXP (vs DSP56858FGE)
Design Notes
Estimated: Keep external memory address and data traces length-matched within ±0.2 inches to avoid bus-timing skew at 120 MHz. Place 100 nF ceramic decoupling capacitors as close as possible to each VDD/VSS pair on the 128-LQFP, and add 10 uF bulk tantalum or ceramic capacitors on the analog AVSS/AVDD pair to suppress substrate noise coupling into the ADC inputs. The NXP DSP56854 datasheet bus-timing section defines the maximum bus-access cycle and the required wait-state programming for external ROM/SRAM devices.
Estimated: the 128-LQFP-14x20 package has a theta_JA of approximately 38 C/W when mounted on a standard 4-layer JEDEC test board with 1 oz copper. At maximum 120 MHz core and 3.3 V I/O operation the DSP56854 typically consumes around 0.5 W, yielding a ~19 C junction rise above ambient. Provide at least 1 square inch of continuous copper pour on the top layer connected to the VSS pins to keep junction temperature well below the 150 C maximum.
Do not conflate the 5V-tolerant TTL input voltage (5.5 V maximum on digital inputs) with the actual core supply level; the DSP56854 is a 3.3 V-core device built on a 3.3 V process with TTL-compatible logic thresholds that tolerate 5 V inputs. Failing to provide the proper VDDPLL decoupling (typically a 1 uF ceramic plus a small ferrite bead between digital and PLL supplies) can cause intermittent PLL unlock and reset faults. Always configure the JTAG/OnCE port for boundary-scan before production programming to avoid locked-out parts.
Compliance Information
RoHS compliant per NXP product information page for the 56800E family. Not AEC-Q100 qualified; for automotive applications select the AEC-Q100 qualified sibling part from NXP. Lifecycle status is NRND (Not Recommended for New Designs) per distributor listings.