DSPIC33EP256MU806-I/PT - 16-bit 70 MIPS DSC USB | Microchip
MPN: DSPIC33EP256MU806-I/PT ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
DSPIC33EP256MU806-I/PT Overview
A digital signal controller combines the compute architecture of a microcontroller with DSP-class math acceleration on a single chip. In the product hierarchy, the dsPIC33EP belongs to Microchip's 16-bit MCU/DSC portfolio: DSC -> 16-bit microcontroller -> embedded processor -> semiconductor. This makes the part attractive where tight real-time control loops (motor FOC, digital power) execute alongside general firmware.
Key features include the modified Harvard architecture with a 16-bit data path and 24-bit instructions, linear program memory addressing up to 4 MB, an internal oscillator, integrated USB, and Peripheral Pin Select (PPS) that lets designers remap digital peripherals onto many of the 51 I/O pins to optimize board routing.
Technical depth: the dsPIC33E core provides DSP multiply-accumulate instructions, hardware division, and interrupt latency suited to precision control. The MU family variant adds the USB peripheral, distinguishing it from MC (motor control) and GP (general purpose) siblings in the same dsPIC33EP generation, which share the same core, memory map style, and 64-pin TQFP footprint.
Typical applications include precision motor control (FOC/BLDC/PMSM drives), digital power supplies and PFC stages, and embedded control systems requiring USB connectivity such as industrial sensors, instrumentation, and human-machine interfaces.
Design consideration: confirm VCAP/VDDCORE capacitor requirements and operating voltage range (standard -40C to +85C for the -I temperature suffix) from the Microchip datasheet before finalizing the power tree.
This page synthesizes distributor data, same-family drop-in alternatives, and design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP256MU806-I/PT — 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 DSPIC33EP256MU806-I/PT (same form factor and footprint) — differing in Core Architecture, Operating Temperature, Package, RoHS Status, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128MU806-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP512MU806-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP256MU806-H/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP256MC206T-I/PT
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →DSPIC33EP256GP504-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.68 / Unit
View Datasheet →DSPIC33EP256MU806-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC DSC, modified Harvard |
| Core Speed | 60 MHz (family up to 70 MIPS) |
| Program Memory (Flash) | 256 KB (85.5K x 24) |
| RAM | 28 KB |
| Number of I/O | 51 |
| Package | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Oscillator Type | Internal |
| USB | Yes |
| Instruction Width | 24-bit |
| Data Path Width | 16-bit |
| Linear Program Addressing | Up to 4 MB |
| Peripheral Pin Select | Yes (remappable RPn/RPIn pins) |
| Operating Temperature | -40C to +85C (I suffix) |
| Packaging | Tube |
| RoHS Status | unknown |
DSPIC33EP256MU806-I/PT 64-tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for DSPIC33EP256MU806-I/PT (64-tqfp (10x10 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 DSPIC33EP256MU806-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP256MU806-I/PT is suitable for 6 applications: Precision Motor Control (BLDC/PMSM FOC), Digital Power Supplies (PFC / LLC / Buck), USB-Connected Industrial Sensors, Test and Measurement Instrumentation, Lighting and Electronic Ballast Control, Medical and Diagnostic Portable Devices.
Precision Motor Control (BLDC/PMSM FOC)
The DSPIC33EP256MU806-I/PT fits precision motor control because its 70 MIPS 16-bit DSC core executes field-oriented control loops with DSP multiply-accumulate instructions while the 256 KB flash holds the full FOC stack, parameter tables, and fault logging. Microchip explicitly positions the dsPIC33E family for 'high-performance, precision motor control systems' on its product page. In the drive topology, the controller runs current/speed loops and generates complementary PWM gate signals through high-speed PWM outputs, sampling phase currents with on-chip ADC. The Peripheral Pin Select feature simplifies routing of encoder (QEA/QEB) and PWM pins on the 64-TQFP. Because it adds USB for host commissioning, firmware updates, and telemetry, the MU variant avoids a second communication MCU in servo drives, industrial pumps, and robotics actuators.
Recommended
Digital Power Supplies (PFC / LLC / Buck)
For digital power, the DSPIC33EP256MU806-I/PT provides the deterministic 60 MHz (70 MIPS) core that PFC and LLC control laws require, with ADC-triggered PWM updates closed at switching frequency. The 24-bit instruction architecture and DSP MAC instructions implement PI and resonant compensators with low cycle counts, while 28 KB RAM supports multi-rail state machines and soft-start sequences. The 51 I/O and Peripheral Pin Select let engineers map PWM, ADC, and fault inputs optimally on a 10x10 mm 64-TQFP land pattern, shrinking the control board of an AC-DC stage. USB support is a practical differentiator: production test rigs and tuning tools connect over a standard USB port to trim compensation gains, log efficiency curves, and update firmware in the field without external debugger hardware.
Recommended
USB-Connected Industrial Sensors
The integrated USB peripheral makes the MU806 well suited to industrial sensor nodes that must also communicate with PCs, HMIs, or gateways. The 256 KB flash retains calibration tables, multi-point compensation algorithms, and a USB CDC/HID stack simultaneously, while the 70 MIPS core performs filtering (IIR/FIR) on raw transducer data before transmission. The internal oscillator removes an external crystal for cost-sensitive designs, and Peripheral Pin Select lets SPI/I2C/UART map to any of 51 I/O so the PCB routes sensor interface buses efficiently. Compared with a plain PIC24 MCU, the DSP MAC instructions accelerate FFT-based vibration or acoustic sensing. Typical products include load-cell transmitters, flow meters, and condition-monitoring probes that require both local DSP and USB commissioning.
Recommended
Test and Measurement Instrumentation
Handheld and bench instruments benefit from the DSPIC33EP256MU806-I/PT's combination of DSP throughput and USB connectivity. The 70 MIPS core implements waveform averaging, windowed FFTs, and control of acquisition timing, while the 28 KB RAM buffers sample blocks prior to USB bulk transfer to a host application. The 64-TQFP 10x10 mm package fits behind front-panel controls, and 51 I/O drive keypads, displays, and relay attenuators directly. Peripheral Pin Select simplifies board revisions when instrument sub-blocks change. Because the device runs from an internal oscillator with a standard -40C to +85C industrial rating (the -I suffix), it tolerates bench environments without precision external clocking for non-RF subsystems. Typical builds include data loggers, cable testers, and portable signal generators.
Recommended
Lighting and Electronic Ballast Control
Digitally controlled lighting ballasts and LED drivers use the DSPIC33EP256MU806-I/PT for phase-dimming, resonant half-bridge, or LLC topologies. The high-speed PWM outputs generate complementary, dead-band-adjusted gate waveforms, and the 60 MHz core closes feedback loops (current regulation, constant-power control) at switching frequency using ADC-synchronized sampling and DSP MAC instructions. The 256 KB flash stores dimming curves, DALI-style protocol stacks, and fault tables; 28 KB RAM supports communication buffering. USB enables factory programming and end-of-line calibration over a standard connector, which is valuable in luminaires lacking exposed service ports. With 51 remappable I/O, the 64-TQFP integrates sense circuits, protection comparators, and user interfaces on one compact controller board.
Recommended
Medical and Diagnostic Portable Devices
Portable diagnostic devices, such as blood-pressure monitors, glucose analyzers, and handheld ECG recorders, leverage the DSPIC33EP256MU806-I/PT for real-time signal processing plus USB data offload. The 16-bit DSC core executes FIR filtering and baseline-removal algorithms with hardware MACs, delivering clean waveforms from noisy front ends at low power, while 256 KB flash keeps multiple patient profiles and algorithm variants resident. The industrial -40C to +85C rating covers storage and transport extremes, and the internal oscillator with USB device support simplifies the bill of materials. Peripheral Pin Select adapts the same 64-TQFP PCB to alternate sensor modules across product families, cutting qualification effort. Engineers should verify any regulatory isolation requirements in the analog front end separately from the controller domain.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP256MU806-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128MU806-I/PT | DSPIC33EP512MU806-I/PT | DSPIC33EP256MU806-H/PT | DSPIC33EP256MC206T-I/PT | DSPIC33EP256GP504-I/PT |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 256 KB | 128 KB | 512 KB | 256 KB | 256 KB | 256 KB |
| Core Speed | 60 MHz (70 MIPS max) | 60 MHz (70 MIPS max) | 60 MHz (70 MIPS max) | 60 MHz (70 MIPS max) | 60 MHz (70 MIPS max) | 60 MHz (70 MIPS max) |
| USB Peripheral | Yes | Yes | Yes | Yes | No (MC motor-control variant) | No (GP general-purpose variant) |
| Pin Compatibility | Reference (64-TQFP) | Pin-to-pin identical | Pin-to-pin identical | Pin-to-pin identical | Footprint-compatible, verify peripheral mapping | Footprint-compatible, verify peripheral mapping |
Key Differentiators
- Integrated USB peripheral in 256 KB flash class (vs DSPIC33EP256MC206T-I/PT)
- Memory-scaling option within identical footprint (vs DSPIC33EP512MU806-I/PT)
- DSP-class math on an MCU toolchain (vs DSPIC33EP256GP504-I/PT)
Design Notes
dsPIC33EP devices require an external VCAP/VDDCORE capacitor on the internal regulator output pin. Follow the capacitance and ESR guidance in the Microchip dsPIC33EPXXXMU806 family datasheet exactly; an incorrect or omitted VCAP capacitor is the most common cause of unstable core supply and erratic reset behavior on this family. Decouple each VDD pin pair with 0.1 uF ceramics placed within 2 mm of the pins, plus bulk 4.7-10 uF near the 64-TQFP. Verify the -I/PT supply voltage range from the datasheet DC characteristics before finalizing the 3.3 V rail design.
Use Peripheral Pin Select (PPS) to cluster high-speed PWM, encoder, and ADC pins to one side of the 64-TQFP, keeping analog traces short and away from PWM gate-drive nets. Place a solid ground plane under the part; route USB D+/D- as a 90-ohm differential pair with length matching when the USB peripheral is used. SnapEDA provides a verified 64-TQFP 10x10 mm footprint with 0.5 mm pitch exports for Altium, KiCad, Eagle, and Allegro - import it rather than drawing the pad pattern manually to avoid solder-mask errors.
When substituting MC or GP family variants (e.g., DSPIC33EP256MC206T-I/PT) on the same footprint, remember the MU806 is the only variant with USB - firmware that initializes the USB module will fail to build or run on MC/GP parts. Also note the digchip datasheet digest lists 12K x 16 (24 KB) RAM for some family members while Mouser lists 28 KB for this specific MPN; confirm the exact RAM map in the family datasheet before allocating software buffers.
For motor-control applications clocked near 70 MIPS, keep the oscillator (if an external crystal is used in addition to the internal oscillator) close to the device with guard ground, and separate ADC reference returns from digital returns at a single point. Stagger ADC conversions relative to PWM edges using the ADC-trigger from PWM feature so sampling never coincides with switching transients; this measurably reduces current-loop noise on FOC drives built around the dsPIC33EP family.
Compliance Information
Compliance status not stated in the provided web data; verify RoHS/REACH status on the Microchip product page or distributor environmental data before ordering.
