DSPIC33EP32MC502-I/SO - 16-bit 70 MIPS DSC 32KB | Microchip
MPN: DSPIC33EP32MC502-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.12 | $4.12 |
| 10 | $3.71 | $37.10 |
| 100 | $3.3 | $330.00 |
| 500 | $2.96 | $1,480.00 |
| 1,000 | $2.66 | $2,660.00 |
DSPIC33EP32MC502-I/SO Overview
A digital signal controller combines the peripheral set and low interrupt latency of a microcontroller with the multiply-accumulate DSP engine of a digital signal processor, occupying the midpoint of the embedded hierarchy between general-purpose MCUs and dedicated DSPs. Microchip positions the dsPIC33E family specifically for precision digital power conversion and motor control, where deterministic PWM timing and fast analog sampling matter more than raw clock speed.
Key features include a high-speed PWM module purpose-built for brushless DC, permanent magnet synchronous, AC induction and stepper motor control; an advanced 10-bit/12-bit ADC for simultaneous current and voltage sensing; a DSP engine with single-cycle MAC and hardware divide; and standard serial connectivity through UART, SPI and I2C peripherals. The 70 MIPS core executes from zero-wait-state FLASH for deterministic control loops.
The MC-class variant integrates the motor-control PWM with complementary outputs, dead-time insertion, fault inputs and the quadrature encoder interface (QEI) needed to close position and current loops in field-oriented control (FOC) and sensorless drives. Flash program memory is self-writable, supporting field firmware updates in end products.
Typical applications include brushless DC motor drives, power factor correction converters, digital UPS and solar inverter stages, industrial automation nodes, and consumer appliance control boards where the 28-SOIC footprint fits cost-sensitive single-controller designs.
When designing with this device, budget the 4KB RAM carefully: FOC current loops plus communication buffers fit comfortably, but large lookup tables should be placed in FLASH. Decouple VDD with 0.1uF ceramics per pin and keep PWM return paths away from analog sensing traces.
This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing current as of 2026-09-25.
Drop-in alternatives for DSPIC33EP32MC502-I/SO — 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 DSPIC33EP32MC502-I/SO (same form factor and footprint) — differing in Package, Core Architecture, RAM, Maximum CPU Speed, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32MC202-I/SO
✅ Drop-In✓ In Stock
$3.46 / Unit
View Datasheet →DSPIC33EP16MC202-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64MC202-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64MC502-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32GP502T-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.42 / Unit
View Datasheet →DSPIC33EP32MC502-I/SO Maximum Ratings & Electrical Characteristics
| Core Processor | dsPIC33E (16-bit DSC core) |
| Core Size | 16-bit |
| Maximum Performance | 70 MIPS |
| Program Memory (FLASH) | 32KB (10.7K x 24) |
| RAM | 4KB |
| Package | 28-SOIC (0.295 in / 7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| PWM Module | Motor Control PWM (high-speed, complementary outputs) |
| Communication Peripherals | UART, SPI, I2C |
| Quadrature Encoder Interface | Yes (MC-class feature) |
| DSP Engine | Single-cycle MAC, hardware divide |
| Packaging | Tube |
| RoHS Status | Compliant |
DSPIC33EP32MC502-I/SO 28-soic (0.295 in / 7.50 mm width) Pin Configuration Guide
Pin configuration for DSPIC33EP32MC502-I/SO (28-soic (0.295 in / 7.50 mm width) 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 DSPIC33EP32MC502-I/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32MC502-I/SO is suitable for 6 applications: Brushless DC Motor Drives, Digital Power Conversion (PFC and Inverters), Industrial Automation Nodes, Consumer Appliance Control, Battery Management and Charging Systems, Position Sensing and Motion Feedback Systems.
Brushless DC Motor Drives
The dsPIC33EP32MC502's MC-class high-speed PWM with complementary outputs, programmable dead-time insertion and fault shut-down inputs directly drives three-phase inverter bridges for BLDC and PMSM motors. The 70 MIPS core with single-cycle MAC executes field-oriented control (FOC) current loops in the 10-20 kHz range, while the onboard ADC samples phase currents in synchronization with PWM centers to reduce switching noise in readings. In a typical sensorless design, the QEI module or back-EMF sensing replaces costly hall sensors. The 32KB FLASH holds the FOC stack plus communication, and the 28-SOIC package keeps controller BOM cost low for appliance fans, pumps, power tools and drones.
Recommended
Digital Power Conversion (PFC and Inverters)
Digital power supplies, power factor correction stages and solar micro-inverters need deterministic control-loop timing, which the dsPIC33EP32MC502 delivers with its zero-wait-state FLASH execution and 70 MIPS core. The high-speed PWM supports phase-shifted, interleaved and complementary topologies with sub-nanosecond-class resolution within the PWM module, and the fast ADC triggers directly from PWM events to sample inductor current and bus voltage at the optimal instant per switching cycle. The DSP engine handles Park/Clarke transforms and compensator math in fixed point. The 28-SOIC footprint and industrial temperature rating make it practical for telecom rectifiers, UPS units and LED driver power stages.
Recommended
Industrial Automation Nodes
In factory automation, the dsPIC33EP32MC502-I/SO serves as a compact intelligent actuator or sensor controller. Its UART, SPI and I2C ports interface to RS-485 transceivers, industrial sensors and EEPROM configuration storage, while motor-control PWM drives conveyor drives, dampers and valve actuators. The -40C to +85C industrial temperature rating and RoHS-compliant 28-SOIC package support control panels and machine-mounted electronics. The self-programmable FLASH enables field firmware updates over the serial link, reducing maintenance visits. With 70 MIPS headroom, one controller can run the control loop and a Modbus-class protocol stack simultaneously without a second processor.
Recommended
Consumer Appliance Control
Washing machines, dishwashers, air conditioners and refrigeration compressors increasingly use variable-speed motors controlled by a single DSC. The dsPIC33EP32MC502 fits this role: the 28-SOIC package is inexpensive and easy to assemble, 32KB FLASH holds the motor algorithm plus user interface logic, and the MCU-style peripherals (timers, I2C for display drivers, UART for panel links) coexist with the motor PWM on one chip. Microchip's product page highlights that dsPIC33E-based drives are more energy efficient and quieter in operation. The 4KB RAM accommodates commutation state machines plus serial buffers for appliance-to-mainboard communication.
Recommended
Battery Management and Charging Systems
Smart chargers and battery management units benefit from the dsPIC33EP32MC502's combination of fast analog sensing and deterministic PWM. The ADC monitors pack voltage, current and temperature across multiple channels while the PWM module drives buck/boost power stages with precise duty-cycle control for CC/CV charging profiles. The 70 MIPS core runs coulomb counting, state-of-charge estimation and safety cut-off logic in fixed-point DSP math. I2C and UART provide gauge reporting and host communication. The industrial temperature rating suits e-bike, portable power station and backup-battery products, and the 28-SOIC package allows compact single-controller charger board designs.
Recommended
Position Sensing and Motion Feedback Systems
The quadrature encoder interface of the MC502 class decodes incremental encoder signals A/B/Z directly in hardware, offloading the CPU and enabling high-resolution position capture even at 70 MIPS loading. This makes the dsPIC33EP32MC502-I/SO a strong fit for servo indexing heads, linear actuator position feedback, gimbal controllers and robotic joint modules. The DSP engine performs velocity filtering and PID position loops at kHz rates, while PWM drives the associated motor stage from the same chip. The 28-SOIC package permits mounting the controller directly on the motor driver PCB, shortening encoder signal paths and improving noise immunity in electrically noisy machinery.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32MC502-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32MC202-I/SO | DSPIC33EP16MC202-I/SO | DSPIC33EP64MC502-I/SO |
|---|---|---|---|---|
| Package | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| FLASH Program Memory | 32KB (10.7K x 24) | 32KB (10.7K x 24) | 16KB | 64KB |
| RAM | 4KB | Reduced vs MC502 | Reduced vs MC502 | 4KB (same class) |
| Core Performance | 70 MIPS, 16-bit | 70 MIPS, 16-bit | 70 MIPS, 16-bit | 70 MIPS, 16-bit |
| Motor-Control PWM / QEI | Full MC-class with QEI | MC-class, verify QEI config | MC-class, verify QEI config | Full MC-class with QEI |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) |
Key Differentiators
- Full motor-control peripheral set with QEI (vs DSPIC33EP32MC202-I/SO)
- Drop-in FLASH upgrade path (vs DSPIC33EP64MC502-I/SO)
- Motor-class integration at 28-pin cost point (vs DSPIC33EP32GP502T-E/SO)
Design Notes
Decouple every VDD pin with a 100nF ceramic capacitor placed within 2 mm of the pin, plus one bulk 4.7-10uF capacitor near the device. On the 28-SOIC, MCLR should have a 10k pull-up and a programming header exposing MCLR, VDD, GND, PGD and PGC for ICSP debugging with ICD/REAL ICE. Keep the ICSP traces short if the header doubles as a production programming point.
Separate the analog ground return of the ADC sensing network (current-shunt amplifiers, voltage dividers) from the high-current PWM inverter return. Route the ADC input traces away from PWM output traces and gate-driver lines; the MC-class PWM edges carry large dV/dt that couples into sampling circuits. Synchronize ADC conversion to the PWM center point using the PWM-triggered ADC mode so that switching transients are avoided, rather than adding software delay compensation.
The 4KB RAM is the most common bottleneck when porting FOC firmware from larger dsPIC33EP devices: linker errors from large buffers are frequent. Enable the compiler memory report and place constant lookup tables (SIN tables, gain tables) in FLASH using the psv space. Also verify oscillator configuration: the internal FRC PLL can reach 70 MIPS, but lock and trim settings must match the configuration words or the PWM frequency will be wrong.
Compliance Information
RoHS compliance and lead-free finish per distributor listings (DigiKey/Mouser). No AEC-Q100 qualification indicated in provided data - verify with Microchip for automotive use.
