DSPIC33EP256MC502-E/MM - 60MIPS 16-bit DSC 256KB Flash | Microchip
MPN: DSPIC33EP256MC502-E/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.62 | $5.62 |
| 10 | $5.05 | $50.50 |
| 100 | $4.62 | $462.00 |
| 500 | $4.22 | $2,110.00 |
| 1,000 | $3.95 | $3,950.00 |
DSPIC33EP256MC502-E/MM Overview
A digital signal controller combines the computational throughput of a DSP engine with the deterministic control architecture and peripheral set of a microcontroller. Within the power management hierarchy, the dsPIC33E family sits between general-purpose MCUs and dedicated DSPs, making it the de-facto standard for embedded motor control and digitally controlled power conversion where single-cycle multiply-accumulate (MAC) instructions and fast interrupt response are required.
Key features include the 16-bit dsPIC33E core running at 60 MIPS, 256KB Flash with self-programming support, MCPWM (motor control PWM) peripherals with complementary outputs and dead-time insertion, quadrature encoder interface (QEI) inputs, integrated operational amplifiers, analog comparators, CAN 2.0B for industrial networking, and a reconfigurable peripheral generator (PTG). The -E suffix denotes extended temperature grade (-40C to +125C), enabling enclosed motor-drive environments.
Architecturally, the dsPIC33EP core pairs a 16-bit modified Harvard pipeline with a dedicated DSP multiply-accumulate unit, dual operand fetch, and modulo/bit-reversed addressing for FFT-class algorithms. High-speed ADC sampling synchronized to PWM triggers minimizes control-loop latency in field-oriented control (FOC) implementations, while hardware DMA offloads the CPU during high-rate data movement.
Typical applications include brushless DC and PMSM motor drives, digital power supplies (LLC, PFC, buck converters), solar inverters, and industrial automation nodes using CAN connectivity. The rich analog front-end (op amps, comparators) reduces external component count in current-sense chains.
When designing, budget the 28-pin I/O carefully: pin-multiplexed RPn remappable pins let you route PWM, UART, SPI, and I2C to available pads, but plan them in firmware before PCB layout to avoid conflicts. Verify peripheral assignments against the family reference manual.
This page synthesizes distributor pricing context, same-footprint drop-in alternatives within the dsPIC33EP family, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP256MC502-E/MM — 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 DSPIC33EP256MC502-E/MM (same form factor and footprint) — differing in Package, Analog Peripherals, Core, PWM, Qualification.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256MC502-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC202T-E/MM
✅ Drop-In✓ In Stock
$3.41 / Unit
View Datasheet →DSPIC33EP128MC502-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64MC502-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32MC502-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP256MC502-E/MM Maximum Ratings & Electrical Characteristics
| Core | 16-bit dsPIC33E DSC |
| Maximum Speed | 60 MIPS / 60 MHz |
| Flash Program Memory | 256 KB (85.5K x 24) |
| RAM | 32 KB |
| Package | 28-QFN-S (6x6 mm) |
| Operating Temperature | -40C to +125C (extended, -E grade) |
| PWM | MCPWM motor control PWM with complementary outputs |
| Quadrature Encoder Interface | QEI included |
| CAN | CAN 2.0B |
| Analog Peripherals | Op amps, comparators, high-speed ADC |
| Timers | PTG (Peripheral Trigger Generator) and standard timers |
| Mounting Type | Surface Mount |
| Number of Pins | 28 |
| Family | dsPIC33EP256MC |
| RoHS Status | Compliant |
| Programming Interface | In-Circuit Serial Programming (ICSP), 2-wire |
DSPIC33EP256MC502-E/MM 28-qfn-s (6x6 mm) Pin Configuration Guide
Pin configuration for DSPIC33EP256MC502-E/MM (28-qfn-s (6x6 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 DSPIC33EP256MC502-E/MM.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP256MC502-E/MM is suitable for 6 applications: BLDC / PMSM Motor Control, Digitally Controlled Power Supplies, Solar Inverters and Renewable Energy, Industrial Automation and CAN Networking Nodes, Electric Vehicle and E-mobility Subsystems, Sensor Signal Processing and Embedded Control.
BLDC / PMSM Motor Control
The DSPIC33EP256MC502-E/MM is purpose-built for brushless DC and permanent-magnet synchronous motor drives. Its MCPWM module generates complementary PWM pairs with programmable dead-time insertion, while the quadrature encoder interface reads rotor position at full 60 MIPS core speed. On-chip op amps amplify shunt current-sense signals and comparators provide cycle-by-cycle over-current limiting, reducing external component count. In a typical field-oriented control loop, the high-speed ADC is triggered synchronously with the PWM period, sampling phase currents at zero-vector centers for minimal ripple. The -E grade tolerates +125C inside sealed motor housings, and the 60 MIPS DSP MAC engine executes FOC at 20 kHz+ PWM frequencies with headroom for supervisory code.
Recommended
Digitally Controlled Power Supplies
For digital power conversion (PFC, LLC, synchronous buck), the DSPIC33EP256MC502-E/MM pairs its 60 MIPS dsPIC33E core with a high-speed ADC and PWM modules whose registers can be updated per-cycle without glitches. Complementary PWM outputs with dead-time control directly drive half-bridge gate-driver inputs. The DSP multiply-accumulate unit implements compensator IIR filters and average-current-mode control in hardware-efficient single-cycle MAC instructions. Integrated comparators support fast cycle-by-cycle current limiting independent of firmware latency, protecting converters during load transients. The extended -40C to +125C range suits power-supply enclosures near hot components, and CAN 2.0B enables telemetry and remote firmware updates in rack or telecom power architectures.
Recommended
Solar Inverters and Renewable Energy
In solar micro-inverters and string inverters, the DSPIC33EP256MC502-E/MM executes maximum power point tracking (MPPT) algorithms using its DSP engine while simultaneously managing grid-synchronized PWM generation. The 256KB Flash stores MPPT state machines, grid-code compliance routines, and communication stacks simultaneously. High-speed PWM with complementary outputs and dead-time insertion drives the H-bridge power stage, and the on-chip comparators implement hardware over-current shutdown faster than any firmware loop. The extended temperature grade handles rooftop junction-box ambient conditions. CAN or remappable UART/SPI links connect to energy-monitoring and supervisory controllers, and the PTG (Peripheral Trigger Generator) automates ADC/PWM timing sequences with minimal CPU overhead.
Recommended
Industrial Automation and CAN Networking Nodes
The integrated CAN 2.0B controller makes the DSPIC33EP256MC502-E/MM a compact CANopen/DeviceNet-class automation node. One 6x6 mm 28-pin device provides motor or actuator control, sensor acquisition via the high-speed ADC and on-chip op amps, and industrial fieldbus communication without an external CAN controller. The 256KB Flash accommodates protocol stacks plus application logic, and 32KB RAM buffers CAN message queues and control states. Remappable RPn peripheral pins let designers route UART, SPI, I2C, and PWM to whichever pads survive a dense 28-pin budget. The -E extended temperature rating qualifies the node for factory-floor cabinets and outdoor machinery where 85C industrial parts are marginal.
Recommended
Electric Vehicle and E-mobility Subsystems
E-bike, scooter, and EV auxiliary systems (pumps, fans, traction-adjacent drives) benefit from the DSPIC33EP256MC502-E/MM's combination of 60 MIPS motor-control throughput and +125C extended temperature operation typical of under-hood and battery-adjacent environments. MCPWM complementary outputs drive three-phase inverters, QEI accepts encoder or sensor feedback, and on-chip comparators provide fault protection meeting functional-safety response-time goals. The 256KB Flash leaves room for torque-map tables and future OTA firmware staging. CAN 2.0B integrates the node into vehicle communication buses. The compact 6x6 mm QFN conserves PCB area in dense mobility electronics, while ICSP programming enables in-line production flashing.
Recommended
Sensor Signal Processing and Embedded Control
Beyond motor control, the DSPIC33EP256MC502-E/MM serves as a high-performance sensor hub: its DSP MAC unit executes FFT and FIR filtering on high-rate ADC streams, on-chip op amps condition microvolt-level sensor signals, and comparators implement threshold alarms without CPU intervention. The 256KB Flash supports bootloaders plus complex measurement firmware, and the PTG automates repetitive sampling sequences to free the CPU. Remappable serial peripherals connect to displays, memory, and radios. The extended -40C to +125C range suits outdoor instruments and process-monitoring equipment. For compact products, the single 6x6 mm QFN replaces a microcontroller, DSP, and analog front-end, cutting BOM count and board area significantly.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP256MC502-E/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256MC502-I/MM | DSPIC33EP128MC202T-E/MM | DSPIC33EP128MC502-I/MM | DSPIC33EP64MC502-I/MM | DSPIC33EP32MC502-I/MM |
|---|---|---|---|---|---|---|
| Package | 28-QFN-S (6x6 mm) | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 60 MIPS | 60 MIPS | 60 MIPS | 60 MIPS | 60 MIPS | 60 MIPS |
| Flash Program Memory | 256 KB (85.5K x 24) | 256 KB | 128 KB | 128 KB | 64 KB | 32 KB |
| Operating Temperature | -40C to +125C (extended) | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +85C | -40C to +85C |
| MCPWM / QEI / CAN Peripherals | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes |
| Drop-in Compatibility | Reference part | Pin-to-pin, zero PCB change | Pin-to-pin, zero PCB change | Pin-to-pin, zero PCB change | Pin-to-pin, zero PCB change | Pin-to-pin, zero PCB change |
Key Differentiators
- Extended temperature rating to +125C (vs DSPIC33EP256MC502-I/MM)
- Full 256KB Flash in the 6x6 mm 28-pin footprint (vs DSPIC33EP128MC202T-E/MM)
- Integrated analog front-end reduces BOM (vs DSPIC33EP32MC502-I/MM)
Design Notes
The 28-pin package uses remappable RPn peripheral pins for PGD/PGC (debug/programming), UART, SPI, I2C, and PWM routing. Lock these assignments before PCB layout - if PGD/PGC pins are permanently allocated to other functions, in-circuit programming and debugging via ICSP become impossible. Always provide a programming header (MCLR, VDD, VSS, PGD, PGC) on production boards. Cross-check peripheral assignments against the family reference manual to detect conflicts in the PPS (Peripheral Pin Select) map.
Decouple each VDD pin with a 0.1 uF ceramic capacitor placed within 2-3 mm of the pin, plus a 4.7-10 uF bulk capacitor near the device. The exposed pad of the QFN-S (6x6 mm) should be soldered to a grounded PCB pad array per Microchip's QFN application notes to ensure thermal relief and a solid ground reference. Voltage ripple on VDD directly degrades ADC accuracy, so isolate the analog supply per the datasheet's power-delivery recommendations for high-precision motor-control current sensing.
Estimated: at the +125C extended-grade limit, allow for self-heating from I/O and core current. With typical operating current of roughly 40-60 mA (estimate at 60 MIPS - verify against the datasheet electrical characteristics) and QFN-28 thermal resistance on the order of 40-50 C/W with a solid ground plane, junction rise above ambient stays under ~5C, leaving comfortable margin. Designs sinking substantial I/O current (LED drivers, gate drive through external drivers) should verify theta-JA from the datasheet and compute TJ = TA + P x theta-JA before committing to the +125C environment.
Keep PWM output traces short and route them away from analog sense lines feeding the op-amp/comparator inputs; gate-driver switching edges can couple into current-feedback signals and corrupt control loops. Use a star or dedicated analog ground region under the ADC/op-amp pins. For encoder (QEI) inputs, add small RC filters (e.g., 100 ohm/100 pF, tune per cable length) if signals travel through cables, and take advantage of the peripheral trigger generator to synchronize ADC sampling with PWM zero-vectors for lowest measured current ripple.
Compliance Information
RoHS compliant and lead-free per distributor listings (Mouser/DigiKey). REACH, halogen-free, and conflict-minerals statements should be downloaded from Microchip's official compliance documentation for this exact ordering code.
