DSPIC33EP256GM706-I/MR - 70 MIPS 16-bit DSC 256KB Flash | Microchip
MPN: DSPIC33EP256GM706-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.52 | $6.52 |
| 10 | $5.94 | $59.40 |
| 100 | $5.31 | $531.00 |
| 500 | $4.78 | $2,390.00 |
| 1,000 | $4.35 | $4,350.00 |
DSPIC33EP256GM706-I/MR Overview
A digital signal controller combines the computational strengths of a microcontroller (MCU) with the math acceleration of a digital signal processor (DSP). Within the power-management hierarchy of embedded silicon, the dsPIC33EP family sits between general-purpose MCUs and dedicated DSPs: it retains MCU peripherals such as UART, SPI, I2C, timers and PWM, while adding a DSP engine with single-cycle MAC, hardware divide and dual operand fetch, making it a natural choice for closed-loop control systems.
Key features of this part include the 70 MIPS dsPIC33EP core operating up to 60 MHz, integrated motor-control PWM (12 MCPWM channels per Mouser listing), 8 input capture and 8 output compare channels, 2 quadrature encoder interfaces (QEI), CAN connectivity for industrial networking, and on-chip op-amps referenced in the family datasheet title (Motor Control, OpAmps, CAN). These peripherals directly address sensorless and sensored motor control, digital power conversion and industrial communications.
Technically, the device is built on CMOS process technology with a fixed-point DSP architecture. The 24-bit instruction word enables efficient fractional arithmetic, while the DMA controller offloads data movement between peripherals and RAM without CPU intervention. Flash program memory is executed in place, and the exposed-pad VQFN package provides a low-inductance ground path important for clean analog performance from the integrated ADC and op-amps.
Typical applications include precision motor control (BLDC, PMSM, ACIM drives), digital power supplies and solar inverters, industrial automation nodes with CAN bus, and sensor signal conditioning pipelines that benefit from the on-chip op-amps and DSP MAC engine.
Designers should note that the part operates from a 3.0 V to 3.6 V single supply; if a 5 V system is present, level shifting is required on the communication buses. Decouple the VDD and AVDD pins separately with 0.1 uF ceramics and connect the exposed pad directly to the ground plane for optimal thermal and noise performance.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet, formatted for both human engineers and AI search engines.
Drop-in alternatives for DSPIC33EP256GM706-I/MR — 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 DSPIC33EP256GM706-I/MR (same form factor and footprint) — differing in Package, Program Memory (Flash), Quadrature Encoder Interfaces, Core, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesDSPIC33EP256GM706-I/MR Maximum Ratings & Electrical Characteristics
| Core | dsPIC33EP 16-bit |
| Core Speed | 70 MIPS (60 MHz max clock) |
| Program Memory (Flash) | 256 KB (85.5K x 24) |
| RAM | 16 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 64-VQFN (9x9 mm) exposed pad |
| Mounting Type | Surface Mount |
| Interfaces | I2C, SPI, IrDA, UART, USART, CAN |
| Motor Control PWM (MCPWM) | 12 channels |
| Input Capture / Output Compare | 8 / 8 |
| Quadrature Encoder Interfaces (QEI) | 2 |
| Technology | CMOS, fixed-point DSP architecture |
DSPIC33EP256GM706-I/MR 64-vqfn (9x9 mm) exposed pad Pin Configuration Guide
Pin configuration for DSPIC33EP256GM706-I/MR (64-vqfn (9x9 mm) exposed pad 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 DSPIC33EP256GM706-I/MR.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP256GM706-I/MR is suitable for 6 applications: Precision Motor Control (BLDC/PMSM/ACIM), Digital Power Conversion and Inverters, Industrial Automation and CAN Networking, Sensor Signal Conditioning and DSP Processing, Portable and Embedded Instrumentation, Automotive-Adjacent and High-Temperature Systems.
Precision Motor Control (BLDC/PMSM/ACIM)
The DSPIC33EP256GM706-I/MR fits high-performance motor drives because its 70 MIPS fixed-point DSP core executes field-oriented control (FOC) algorithms with single-cycle MAC operations, while the 12-channel motor-control PWM provides complementary outputs with programmable dead time for three-phase inverters. The 2 quadrature encoder interfaces read position feedback from incremental encoders at full speed without software overhead, and the 8 input-capture channels can monitor Hall sensors or back-EMF zero crossings for sensorless commutation. In a typical drive, the on-chip op-amps amplify current-shunt signals before the ADC, eliminating external amplifier stages and reducing BOM cost. Placed as the single controller between the rectifier and gate-driver stage, the part delivers deterministic control-loop latency that switching converters and IGBT/SiC bridges require.
Recommended
Digital Power Conversion and Inverters
For digital power supplies, solar micro-inverters and PFC stages, the DSPIC33EP256GM706-I/MR provides the fast PWM resolution and DSP throughput needed for voltage-mode and current-mode control loops running at 100 kHz and above. The 12 MCPWM channels support phase-shifted and interleaved topologies, and the high-resolution core allows duty-cycle updates each switching period without loop instability. Because the device operates from a 3.0 V to 3.6 V supply with clean exposed-pad grounding, analog noise from the power stage remains manageable when layout separates the power and analog grounds. Engineers typically dedicate one op-amp channel to current feedback and use the DMA controller to stream ADC results to RAM, keeping the CPU free for compensation math and CAN or UART communications with a host controller.
Recommended
Industrial Automation and CAN Networking
In industrial nodes such as conveyor controllers, pump stations and factory sensors, the DSPIC33EP256GM706-I/MR combines CAN connectivity with rich timer resources, letting one chip handle both the fieldbus interface and local closed-loop control. The 70 MIPS core processes protocol stacks and application logic concurrently, while the 8 output-compare channels generate synchronized actuator timing. The -40C to +85C industrial temperature grade (I suffix) matches standard industrial ambient requirements, and the 64-VQFN 9x9 mm package fits compact DIN-rail module layouts. Typical designs use CAN for command/status exchange, UART for commissioning access, and SPI for local expansions such as EEPROM or additional ADCs, with the 256 KB Flash providing headroom for protocol stacks plus application and field-updatable firmware.
Recommended
Sensor Signal Conditioning and DSP Processing
The GM7xx tier integrates on-chip operational amplifiers (referenced in the family datasheet title 'Motor Control, OpAmps, CAN'), which makes the DSPIC33EP256GM706-I/MR suitable for direct conditioning of small differential signals from current shunts, pressure bridges or thermocouple front ends. Signals are amplified by the internal op-amps, digitized by the on-chip ADC, and then filtered or demodulated by the 70 MIPS DSP engine using single-cycle MAC and fractional arithmetic. Using internal amplification saves board area and external component count in multi-channel sensing systems. Designers should route analog inputs away from PWM switching nodes and take advantage of the exposed pad connected to ground to keep analog noise low; the DMA controller can continuously buffer ADC samples for block-based DSP algorithms without CPU polling.
Recommended
Portable and Embedded Instrumentation
Handheld instruments, battery testers and field measurement tools benefit from the DSPIC33EP256GM706-I/MR's combination of low 3.3 V operation, rich peripherals and compact 9x9 mm VQFN footprint. The 16 KB RAM supports display buffers and data logging, UART/IrDA links to portable interfaces are natively supported, and the device's low-power management modes allow sleep currents compatible with battery operation between measurements. The 256 KB Flash typically hosts a graphical UI, measurement DSP routines and a USB/UART bootloader. Because the same die is available in TQFP (-I/PT), a single firmware base can serve both compact VQFN production units and rework-friendly TQFP development boards, accelerating time to market for mixed product families.
Recommended
Automotive-Adjacent and High-Temperature Systems
While the -I/MR variant is rated -40C to +85C, Microchip offers the identical die in the DSPIC33EP256GM706-E/MR extended-temperature version rated to +125C, allowing designs in high-ambient enclosures, under-hood-adjacent modules and industrial heat zones to share firmware and PCB footprint. The same 64-VQFN (9x9) pinout means a single layout supports both temperature grades, so engineers can qualify the E-grade only where the application demands it. In these systems the CAN interface connects to vehicle-style networks, the motor-control PWM drives pumps or fans, and the 70 MIPS core runs supervisory and diagnostic code. Designers should derate junction temperature and verify thermal resistance for the VQFN package in their specific copper-pour configuration.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP256GM706-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256GM706-E/MR | DSPIC33EP256GM706-I/MR | DSPIC33EP512GM706-I/MR | DSPIC33EP128GM706-I/MR | DSPIC33EP256GM306T-I/MR |
|---|---|---|---|---|---|---|
| Package | 64-VQFN (9x9) MR | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Performance | 16-bit, 70 MIPS | 16-bit, 70 MIPS | 16-bit, 70 MIPS | 16-bit, 70 MIPS | 16-bit, 70 MIPS | 16-bit, 70 MIPS |
| Flash Program Memory | 256 KB (85.5K x 24) | 256 KB | 256 KB | 512 KB | 128 KB | 256 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Operating Temperature | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) |
| 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 | 3.0 V to 3.6 V |
| Motor-Control Peripherals | 12 MCPWM, 8/8 IC/OC, 2 QEI | 12 MCPWM, 8/8 IC/OC, 2 QEI | 12 MCPWM, 8/8 IC/OC, 2 QEI | 12 MCPWM, 8/8 IC/OC, 2 QEI | 12 MCPWM, 8/8 IC/OC, 2 QEI | 12 MCPWM, 8/8 IC/OC, 2 QEI (no GM7xx op-amps) |
| Key Peripherals | CAN, I2C, SPI, UART, OpAmps | CAN, I2C, SPI, UART, OpAmps | CAN, I2C, SPI, UART, OpAmps | CAN, I2C, SPI, UART, OpAmps | CAN, I2C, SPI, UART, OpAmps | CAN, I2C, SPI, UART (op-amp tier differs) |
Key Differentiators
- 70 MIPS DSP core with on-chip op-amps (vs DSPIC33EP256GM306T-I/MR)
- Extended-temperature sibling available (vs DSPIC33EP256GM706-E/MR)
- Memory scalability on the same footprint (vs DSPIC33EP512GM706-I/MR)
Design Notes
The 64-VQFN 9x9 mm package has an exposed pad on the bottom that must be soldered to a ground-plane pad on the PCB - do not treat it as optional. This pad is the primary ground return and the main thermal path. Use a solder-mask-defined array of vias (typically 4x4) under the pad to tie it to internal ground planes. Follow the PCB layout guidelines in the dsPIC33EP family datasheet section on VQFN assembly, and review Microchip application note AN1292 (thermal design for QFN packages) when the device drives high-pin-current motor-control outputs.
Supply the device from a clean 3.3 V rail within the 3.0 V to 3.6 V window. Decouple every VDD pin pair with 0.1 uF ceramic capacitors placed within 2 mm of the pins, plus one bulk 4.7-10 uF capacitor near the device. Keep AVDD on its own RC-filtered feed (for example a ferrite bead plus 10 uF and 0.1 uF) so that digital switching noise from the 70 MIPS core does not degrade ADC and op-amp accuracy. Estimated: with typical dsPIC33EP operating currents in the tens-of-mA range, a standard 3.3 V/500 mA LDO provides adequate headroom for the MCU plus a CAN transceiver.
Three recurring issues on dsPIC33EP designs: (1) Applying 5 V to VDD - the absolute maximum is 3.6 V; use level shifters for 5 V buses. (2) Mixing up package suffixes - the MR (VQFN 9x9) and PT (TQFP) footprints are NOT interchangeable; verify the -I/MR suffix on the purchase order. (3) Emulation pin contention - reserve the PGD/PGC programming pins with test points on production boards, since in-circuit debugging of the 70 MIPS core is impossible otherwise. Also confirm the PPS (peripheral pin select) mapping in firmware, as many digital peripherals can be routed to multiple pins and mis-mapping is a common bring-up failure.
Compliance Information
Sold as standard lead-free production packaging per distributor listings; obtain formal RoHS/REACH certificates from Microchip for project documentation.
