DSPIC33EP256MU806T-I/PT - 16-Bit DSC 256KB USB CAN | Microchip
MPN: DSPIC33EP256MU806T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.85 | $12.85 |
| 10 | $11.72 | $117.20 |
| 100 | $10.45 | $1,045.00 |
| 500 | $9.68 | $4,840.00 |
| 1,000 | $8.95 | $8,950.00 |
DSPIC33EP256MU806T-I/PT Overview
A digital signal controller (DSC) is a hybrid device that combines the real-time control peripherals and interrupt behavior of a microcontroller (MCU) with the single-cycle multiply-accumulate (MAC) and barrel-shifter datapath of a digital signal processor (DSP). In the system hierarchy, a DSC sits between a general-purpose MCU and a dedicated DSP: it executes control loops in firmware while accelerating math-intensive algorithms such as Park/Clarke transforms, PID, and digital filters. The dsPIC33E family is Microchip's third-generation DSC line, targeting high-performance precision motor control and digital power conversion.
Key differentiators of this device include its 70 MIPS core (60 MHz, 1.65 DMIPS/MHz class), 256 KB Flash with 85.5K x 24 instruction words, 28 KB RAM, 15-channel DMA, and dual CAN 2.0B modules. The high-speed PWM module provides 6 pairs of complementary outputs with 1.04 ns resolution, enabling precise three-phase inverter control. The 24-channel ADC supports 10-bit and 12-bit modes with simultaneous sampling for current-sense and position feedback.
The dsPIC33E core uses a modified Harvard architecture with a 16-bit data path and 24-bit instruction words, executing most instructions in a single cycle. The integrated DSP engine adds a 17x17-bit multiplier, a 40-bit accumulator, and two 40-bit saturating accumulators for fixed-point math. On-chip peripherals include UART, SPI, I2C, USB 2.0 full-speed OTG, and dual CAN, allowing the device to serve as both a control node and a communications gateway.
Typical applications include field-oriented control (FOC) of three-phase brushless DC (BLDC) and permanent-magnet synchronous motors (PMSM), digital power supplies, solar micro-inverters, automotive body electronics, and industrial automation gateways. The dual CAN interface makes it well suited to automotive and industrial networks requiring redundant buses.
When designing with this device, pay close attention to the analog supply decoupling and the ADC reference (AVDD/AVSS) layout, since the 12-bit ADC accuracy depends on a clean reference. The 64-pin TQFP package requires careful thermal and ground-plane design for the high-speed PWM and USB differential pair.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers with a single reference for selection, replacement, and layout decisions.
Drop-in alternatives for DSPIC33EP256MU806T-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 DSPIC33EP256MU806T-I/PT (same form factor and footprint) — differing in Package, Operating Temperature, Packaging, Core Architecture, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256MU806-I/PT
✅ Drop-In✓ In Stock
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View Datasheet →DSPIC33EP256MU814-I/PH
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$11.75 / Unit
View Datasheet →DSPIC33EP256MC504-I/PT
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$4.6 / Unit
View Datasheet →DSPIC33EP256MC504T-I/TL
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$3.32 / Unit
View Datasheet →DSPIC33EP256MU806T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33E DSC with integrated DSP |
| Maximum CPU Speed | 70 MIPS (60 MHz) |
| Program Memory (Flash) | 256 KB (85.5K x 24 instruction words) |
| RAM | 28 KB |
| Data Bus Width | 16-bit |
| Supply Voltage Range | 3.0 V to 3.6 V |
| I/O Pins | 51 |
| ADC Channels | 24-channel 10/12-bit ADC |
| DMA Channels | 15 |
| CAN Controllers | 2x CAN 2.0B |
| USB | USB 2.0 full-speed OTG |
| High-Speed PWM | 6 pairs complementary outputs, 1.04 ns resolution |
| General Purpose Timers | 27 |
| Package | 64-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| RoHS Status | Compliant |
| Packaging | Tape & Reel |
DSPIC33EP256MU806T-I/PT 64-pin tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for DSPIC33EP256MU806T-I/PT (64-pin 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 DSPIC33EP256MU806T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP256MU806T-I/PT is suitable for 6 applications: Field-Oriented Motor Control, Digital Power Conversion, Automotive Body and Network Gateway, Industrial Automation Controller, USB Data Acquisition Module, Solar Micro-Inverter Control.
Field-Oriented Motor Control
The DSPIC33EP256MU806T-I/PT is well suited to field-oriented control (FOC) of three-phase BLDC and PMSM motors because its 70 MIPS dsPIC33E core executes Park and Clarke transforms plus PID loops in a single control period, while the high-speed PWM module generates six pairs of complementary outputs with 1.04 ns resolution. The 24-channel 10/12-bit ADC samples phase currents and position feedback simultaneously, and the 15-channel DMA moves conversion results to RAM without CPU intervention. In a typical implementation, the device runs a 10-20 kHz current loop and a slower 1-2 kHz speed loop, with the dual CAN interface reporting status to a host controller. The trade-off versus a dedicated motor-control ASIC is higher firmware complexity, but the DSC offers full flexibility in control algorithm and peripheral configuration.
Recommended
Digital Power Conversion
In digital power supplies and solar micro-inverters, the DSPIC33EP256MU806T-I/PT uses its high-speed PWM and 12-bit ADC to close voltage and current loops entirely in firmware, replacing analog compensators with programmable digital filters. The 70 MIPS core and hardware 17x17-bit multiplier with 40-bit accumulator allow a full control law to execute within a switching period as short as a few microseconds. The 256 KB Flash stores multiple compensation profiles, and the dual CAN interface enables paralleled converters to share load information. Compared with an analog controller, the DSC adds software development effort but provides adaptive control, fault logging, and field firmware upgrade. Thermal management of the 64-pin TQFP is important when the device drives gate drivers at high switching frequency.
Recommended
Automotive Body and Network Gateway
The dual CAN 2.0B controllers on the DSPIC33EP256MU806T-I/PT make it a natural gateway node for automotive body electronics, where two independent CAN buses must be bridged or monitored. The device can receive frames on one bus, apply filtering or transformation in firmware, and retransmit on the second bus, all while running local control tasks. The 51 I/O pins and 27 general-purpose timers support body functions such as lighting, window, and seat control. USB 2.0 OTG provides a service port for diagnostics and firmware update. The industrial temperature range of -40C to +85C covers most passenger-compartment electronics, though under-hood designs should verify the temperature grade against the specific automotive qualification required.
Recommended
Industrial Automation Controller
For industrial automation, the DSPIC33EP256MU806T-I/PT serves as a compact controller combining real-time motion control with fieldbus connectivity. Its 70 MIPS core handles interpolation and trajectory generation, while the high-speed PWM drives stepper or servo power stages. The dual CAN interface connects to CANopen or DeviceNet networks, and the 24-channel ADC reads analog sensors such as pressure and temperature transducers. The 15-channel DMA offloads data movement, leaving CPU cycles for control math. The 64-pin TQFP package fits space-constrained DIN-rail modules. Designers should note that the 3.0 V to 3.6 V supply requires a clean 3.3 V rail, and the ADC reference should be decoupled separately to preserve 12-bit accuracy in electrically noisy factory environments.
Recommended
USB Data Acquisition Module
The integrated USB 2.0 full-speed OTG controller allows the DSPIC33EP256MU806T-I/PT to act as a self-powered data acquisition module that streams sensor data to a host PC without an external bridge chip. The 24-channel 10/12-bit ADC captures analog inputs, the DMA transfers results to a RAM buffer, and the USB endpoint transmits packets at up to 12 Mbit/s. The 256 KB Flash holds calibration tables and firmware, while the 28 KB RAM buffers several milliseconds of high-rate samples. Compared with an MCU plus external USB-UART bridge, this single-chip approach reduces BOM count and board area. Careful USB differential-pair routing and 90-ohm impedance control are required to meet USB 2.0 signal-integrity requirements on the 64-pin TQFP footprint.
Recommended
Solar Micro-Inverter Control
In solar micro-inverters, the DSPIC33EP256MU806T-I/PT performs maximum power point tracking (MPPT), DC-AC inversion control, and grid synchronization in a single device. The high-speed PWM generates the inverter bridge drive with 1.04 ns resolution, sufficient for sinusoidal PWM at switching frequencies above 20 kHz. The 12-bit ADC samples panel voltage and current for the MPPT algorithm, and the 70 MIPS core executes the perturb-and-observe or incremental-conductance method within each control cycle. The dual CAN interface can report energy production to a system controller. The main design consideration is thermal: the 64-pin TQFP must dissipate the device power while the inverter stage runs at elevated ambient temperature, so adequate copper area and thermal vias are recommended.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP256MU806T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256MU806-I/PT | DSPIC33EP256MU814-I/PH | DSPIC33EP256MC504-I/PT | DSPIC33EP256MU810-I/PF |
|---|---|---|---|---|---|
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 100-pin TQFP (14x14 mm) - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 256 KB (85.5K x 24) | 256 KB (85.5K x 24) | 256 KB (85.5K x 24) | 256 KB (85.5K x 24) | 512 KB |
| RAM | 28 KB | 28 KB | 28 KB | 28 KB | 52 KB |
| Maximum CPU Speed | 70 MIPS (60 MHz) | 70 MIPS (60 MHz) | 70 MIPS (60 MHz) | 70 MIPS (60 MHz) | 70 MIPS (60 MHz) |
| CAN Controllers | 2x CAN 2.0B | 2x CAN 2.0B | 2x CAN 2.0B | 1x CAN 2.0B | 2x CAN 2.0B |
| USB Interface | USB 2.0 full-speed OTG | USB 2.0 full-speed OTG | USB 2.0 full-speed OTG | None | USB 2.0 full-speed OTG |
| I/O Pins | 51 | 51 | 51 | 51 | 85 |
| ADC Channels | 24-channel 10/12-bit | 24-channel 10/12-bit | 24-channel 10/12-bit | 16-channel 10/12-bit | 32-channel 10/12-bit |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
Key Differentiators
- Dual CAN plus USB in a 64-pin TQFP (vs DSPIC33EP256MC504-I/PT)
- 24-channel ADC for multi-axis sensing (vs DSPIC33EP256MC504-I/PT)
- Tape-and-reel packaging for automated assembly (vs DSPIC33EP256MU806-I/PT)
Design Notes
Decouple the VDD and VDDCORE pins with 0.1 uF ceramic capacitors placed within 5 mm of each pin, plus a 10 uF bulk capacitor per supply rail. The ADC reference (AVDD/AVSS) must be decoupled separately with a 0.1 uF and a 1 uF capacitor to preserve 12-bit conversion accuracy. Estimated: at 60 MHz and 3.3 V, core current is on the order of tens of mA, so a low-impedance 3.3 V regulator rated for at least 200 mA is recommended to cover I/O and peripheral loading.
Route the USB D+ and D- differential pair with 90-ohm controlled impedance and matched trace lengths to meet USB 2.0 full-speed signal-integrity requirements. Keep the pair away from the high-speed PWM outputs and the ADC input traces to avoid crosstalk. Place the crystal or oscillator as close as possible to the OSC1/OSC2 pins and guard it with a ground pour. Use a solid ground plane under the 64-pin TQFP and connect the exposed thermal pad, if present, to ground with multiple vias.
Do not exceed the 3.6 V maximum supply voltage; the dsPIC33E core is a 3.3 V device and 5 V logic must be level-shifted. Ensure the MCLR reset pin has a pull-up resistor and a 0.1 uF capacitor to ground for reliable power-on reset. When using the internal oscillator, verify the actual frequency against the datasheet tolerance before relying on it for CAN bit timing or USB, both of which require accurate clocks. Confirm the specific silicon revision errata before production.
Compliance Information
RoHS compliant per distributor listings. The -I/PT industrial temperature grade is not AEC-Q100 qualified; automotive designs should select an appropriately qualified variant.
