DSPIC33EP256MU814-E/PH - 256KB 60MHz DSC USB 144-TQFP | Microchip
MPN: DSPIC33EP256MU814-E/PH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $10.51 | $10.51 |
| 10 | $9.72 | $97.20 |
| 25 | $9.25 | $231.25 |
| 100 | $8.6 | $860.00 |
| 1,000 | $7.95 | $7,950.00 |
DSPIC33EP256MU814-E/PH Overview
A digital signal controller is a hybrid class of processor that merges the computational power of a digital signal processor (DSP) with the peripheral integration and ease of use of a microcontroller. Within the power-management hierarchy of embedded systems, the DSC sits above general-purpose MCUs for math-intensive control loops and below full DSP-plus-MCU two-chip solutions, offering a single-chip path for motor control, digital power conversion and industrial sensing.
Key features of the MU814 variant include 85.5K x 24-bit Flash words, USB 2.0 full-speed device support, dual CAN 2.0B modules, multiple UART/SPI/I2C ports, a 16-bit sigma-delta-free high-speed ADC subsystem, and the motor-control PWM with dead-time insertion that defines the dsPIC33E motor-control family. Barrel shifter and DSP multiply-accumulate instructions accelerate filters and transforms.
Architecturally, the dsPIC33E core executes an enhanced 16-bit instruction set with hardware DSP engine (17x17 multiplier, dual 40-bit accumulators), zero-overhead DO and REPEAT loops, and a programmable PLL clock system that derives the 60 MHz device operation from a low-frequency crystal. Extended-temperature qualification (the -E suffix) and AEC-Q100 automotive usage reported by distributors make it suitable for harsh environments.
Typical applications include dual-axis brushless DC and PMSM motor drives, digital power supplies and inverters, automotive body and powertrain auxiliary systems, and industrial automation nodes that need both USB connectivity and deterministic control loops.
Design consideration: the device operates at 3.0 V to 3.6 V, so level shifting is required for 5 V peripherals; budget the 144-pin TQFP thermal and layout footprint early, and follow the Microchip reference manual clock-routing guidance for USB and CAN coexistence.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-09-24.
Drop-in alternatives for DSPIC33EP256MU814-E/PH — 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 DSPIC33EP256MU814-E/PH (same form factor and footprint) — differing in Package, Operating Temperature, USB, Core Architecture, RAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256MU814-I/PH
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$11.75 / Unit
View Datasheet →DSPIC33EP256MU814-H/PH
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP512MU814-E/PH
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$13.2 / Unit
View Datasheet →DSPIC33EP512MU814-I/PH
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
Contact for price
View Datasheet →DSPIC33EP512MU814-H/PH
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP256MU814-E/PH Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33E DSC |
| CPU Speed | 60 MHz |
| Core Performance | Up to 70 MIPS (family rating) |
| Program Memory (Flash) | 256 KB (85.5K x 24-bit words) |
| RAM | 28 KB |
| Supply Voltage | 3.0 V to 3.6 V |
| USB | USB 2.0 Full-Speed Device |
| CAN Modules | 2 x CAN 2.0B |
| Package | 144-TQFP (16x16 mm), 0.4 mm pitch |
| Operating Temperature | -40C to +125C |
| Qualification | Automotive, AEC-Q100 usage reported by distributor |
| Mounting Type | Surface Mount |
| DSP Engine | 17x17 multiplier, dual 40-bit accumulators, barrel shifter |
| Peripheral Highlights | High-speed PWM, multiple UART/SPI/I2C |
| Series | dsPIC33EP256MU8xx (Motor Control family) |
| RoHS Status | unknown |
DSPIC33EP256MU814-E/PH 144-tqfp (16x16 mm), 0.4 mm pitch Pin Configuration Guide
Pin configuration for DSPIC33EP256MU814-E/PH (144-tqfp (16x16 mm), 0.4 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 DSPIC33EP256MU814-E/PH.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP256MU814-E/PH is suitable for 6 applications: Dual-Axis BLDC/PMSM Motor Control, Digital Power Supplies and Inverters, Automotive Auxiliary and Body Systems, Industrial Automation and PLC I/O Nodes, USB-Connected Test and Measurement Instruments, Embedded IoT Gateways with Multiple Buses.
Dual-Axis BLDC/PMSM Motor Control
The DSPIC33EP256MU814-E/PH was explicitly designed as a dual motor-control DSC: its high-speed PWM modules with independent dead-time insertion, complementary outputs and fault inputs can drive two three-phase inverters from one chip. The 60 MHz dsPIC33E core executes field-oriented control (FOC) loops with its 17x17 hardware multiplier and DSP MAC instructions at up to 70 MIPS, sustaining loop rates well above the electrical frequency of typical BLDC and PMSM machines. Encoder, resolver or Hall interfaces map onto the many 144-pin I/O. Place the controller between gate-driver ICs and the feedback front end; the trade-off is added software complexity versus a dedicated motor ASIC, compensated by full algorithm flexibility and firmware upgradability in the field.
Recommended
Digital Power Supplies and Inverters
Digital switching power supplies, solar micro-inverters and UPS stages benefit from the DSC's deterministic DSP math and high-resolution PWM. The dsPIC33EP256MU814 executes voltage-mode or current-mode compensation loops using fast ADC sampling synchronized to the PWM module, achieving sub-cycle response that analog controllers approximate with external error amplifiers. USB and dual CAN 2.0B modules provide PMBus-style supervision and grid communication without a second controller. Designers typically clock the PWM at hundreds of kHz with the 60 MHz core closed-loop bandwidth limited by ADC conversion and ISR overhead. The 256 KB Flash accommodates full state machines, instrumentation logging and bootloaders, while the extended -40C to +125C rating suits outdoor and industrial power enclosures.
Recommended
Automotive Auxiliary and Body Systems
Distributor data (Hotenda) classifies this part under Automotive with AEC-Q100 usage, and the -E/PH suffix guarantees -40C to +125C operation, matching under-hood-adjacent zones such as pumps, fans, throttle actuators and lighting control. The dual CAN 2.0B interfaces connect directly to vehicle buses (via 3.3 V-compatible CAN transceivers) for OBD and body-network communication, while the DSP engine runs sensor fusion or motor position estimation. Firmware in the 256 KB Flash can host dual-bank bootloaders for OTA-style updates over CAN. For production automotive programs, confirm PPAP documentation and qualification grade with Microchip; distributor summaries are an indicator, not a substitute for the official reliability report.
Recommended
Industrial Automation and PLC I/O Nodes
Factory automation nodes need both deterministic control and industrial connectivity, exactly the combination the MU814 delivers: multiple UART/SPI/I2C ports plus dual CAN for fieldbus, and a 70 MIPS DSP core for predictive-maintenance vibration analysis or sensor signal conditioning with FIR/IIR filters. The 144-pin count exposes abundant remappable I/O for relay banks, encoder inputs and analog front ends, letting one DSC replace an MCU-plus-FPGA or MCU-plus-DSP two-chip stack. Its 256 KB Flash supports protocol stacks and local HMI buffers, while the extended temperature range covers panel-mounted enclosures without active cooling. Designers should budget code space carefully if running USB, CAN stacks and complex filters concurrently.
Recommended
USB-Connected Test and Measurement Instruments
Handheld and bench instruments benefit from the USB 2.0 full-speed device module: the DSC enumerates as a CDC, HID or vendor-specific device directly to a PC with no external USB controller, while the DSP core performs FFTs, averaging and calibration math on captured signals. The 28 KB RAM buffers ADC streams and USB endpoint data concurrently. Example products include data loggers, sensor analyzers and motor diagnostic tools where the same chip that processes signals also handles the USB protocol layer. The 3.0 V to 3.6 V rail is bus-powered friendly through an LDO from the 5 V VBUS line. The 144-TQFP footprint suits instruments where board area is less constrained than cost.
Recommended
Embedded IoT Gateways with Multiple Buses
Industrial IoT gateways often must bridge CAN, RS-485-class UART links and USB simultaneously; the dsPIC33EP256MU814 provides all of these on-chip. Its dual CAN 2.0B modules terminate two fieldbus segments, the USB module connects upward to a host or modem, and multiple UARTs serve legacy sensors, all coordinated by the 60 MHz core running protocol translation in the 256 KB Flash. The DSP engine additionally preprocesses sensor data (filtering, averaging, feature extraction) before uplink, reducing radio data volume. The -E extended temperature rating suits unconditioned outdoor cabinets. A design tip: reserve Flash headroom of at least 25% for OTA firmware updates and protocol stack growth over the product lifetime.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP256MU814-E/PH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256MU814-I/PH | DSPIC33EP512MU814-E/PH | DSPIC33EP256MU810T-I/PF |
|---|---|---|---|---|
| Package | 144-TQFP (16x16 mm) | 144-TQFP (16x16 mm) - same | 144-TQFP (16x16 mm) - same | 100-TQFP - different pin count |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 256 KB (85.5K x 24) | 256 KB (85.5K x 24) | 512 KB (171K x 24) | 256 KB |
| CPU Speed | 60 MHz | 60 MHz | 60 MHz | 60 MHz |
| Operating Temperature | -40C to +125C (-E) | -40C to +85C (-I) | -40C to +125C (-E) | -40C to +85C (-I) |
| USB / CAN | USB FS + 2x CAN 2.0B | USB FS + 2x CAN 2.0B | USB FS + 2x CAN 2.0B | USB FS + 2x CAN 2.0B |
| Pin Count | 144 | 144 | 144 | 100 |
Key Differentiators
- Extended -40C to +125C temperature range in a standard catalogue part (vs DSPIC33EP256MU814-I/PH)
- Maximum Flash headroom without footprint change (vs DSPIC33EP512MU814-E/PH)
- Highest I/O count in the MU family branch (vs DSPIC33EP256MU810T-I/PF)
Design Notes
The device requires a 3.0 V to 3.6 V supply (nominal 3.3 V). Decouple every VDD/VSS pin pair with 0.1 uF ceramics placed within 2 mm of the pins, plus at least 10 uF of bulk capacitance per supply domain. Do not omit the VDDCORE capacitor required by the internal regulator - its value is specified in the datasheet and omitting it causes brown-out resets under load transients. Estimated: with typical 100 mA core operation, a 3.3 V/500 mA LDO provides comfortable margin including USB transceiver load.
The 144-pin TQFP with 0.4 mm lead pitch requires careful fan-out: use 0.15 mm trace width with 0.15 mm clearance under the leads and consider a 4-layer stack with a solid ground plane for USB and CAN signal integrity. Keep the USB D+/D- pair length-matched and 90-ohm differential impedance. Crystal layout must be tight (short traces, guard ring to ground) because the PLL multiplies the crystal frequency up to 60 MHz and jitter there propagates to the USB and PWM modules.
Two frequent mistakes with the MU814: (1) assuming pin compatibility with the MU810 - the 100-pin and 144-pin parts share peripherals but not footprint or pinout, so BOM substitution across them is impossible without a PCB respin; (2) ignoring Peripheral Pin Select (PPS) configuration - many I/O are remappable, and ports left in default state can cause peripheral conflicts at boot. Always initialize PPS registers before enabling communication modules, and verify temperature-suffix needs early: the -E grade (-40C to +125C) is priced and stocked differently from -I parts.
Compliance Information
Hotenda listing reports 'Automotive, AEC-Q100' usage and 3.3V operation. RoHS/REACH status not stated in provided web data - confirm on the Microchip product page.
