DSPIC33EP32MC502-H/SO - 16-bit 70 MIPS DSC, 32KB Flash | Microchip
MPN: DSPIC33EP32MC502-H/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.62 | $3.62 |
| 10 | $3.26 | $32.60 |
| 100 | $2.89 | $289.00 |
| 500 | $2.62 | $1,310.00 |
| 1,000 | $2.38 | $2,380.00 |
DSPIC33EP32MC502-H/SO Overview
A digital signal controller combines the computational throughput of a DSP with the peripheral integration and control architecture of a microcontroller. In the power-management hierarchy, the dsPIC33EP32MC502 sits within the 16-bit DSC class used to run math-intensive closed-loop control algorithms such as field-oriented control (FOC) for motors and digital power conversion loops.
Key features include the 70 MIPS dsPIC DSC core with integrated DSP instruction set and multiply-accumulate hardware, high-speed PWM modules purpose-built for motor control, and advanced analog integration highlighted by Microchip for this family. The 32 KB self-programming flash supports field firmware updates, while the 4 KB SRAM accommodates control-loop state data and buffers.
The device architecture pairs the 16-bit CPU with deterministic interrupt handling and direct memory access for time-critical loops, enabling precision BLDC, PMSM, and ACIM motor drives that operate more efficiently, more quietly, and with extended product life as described on Microchip's product page.
Typical applications include brushless DC motor control, permanent magnet synchronous motor drives, digital power supplies, automotive electronic control units, and industrial automation nodes requiring precise PWM timing.
Design consideration: verify the available flash headroom for control algorithms plus bootloader, and confirm the -H grade temperature range against your thermal environment, since the H variant targets automotive ambient conditions.
This page synthesizes drop-in same-footprint alternatives, per-1000-unit pricing tiers, and practical design notes not consolidated in the Microchip datasheet alone.
Drop-in alternatives for DSPIC33EP32MC502-H/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-H/SO (same form factor and footprint) — differing in Package, Core Architecture, Core Processor, Quadrature Encoder Interface, Qualification.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32MC502-I/SO
✅ Drop-In✓ In Stock
$2.66 / Unit
View Datasheet →DSPIC33EP256MC502-H/SO
✅ Drop-In✓ In Stock
$4.38 / Unit
View Datasheet →DSPIC33EP32MC202-I/SO
✅ Drop-In✓ In Stock
$3.46 / Unit
View Datasheet →DSPIC33EP32GP502-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP32MC502-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.28 / Unit
View Datasheet →DSPIC33EP32MC502-H/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC DSC with DSP engine |
| Maximum CPU Speed | 70 MIPS |
| Core Frequency | 60 MHz |
| Flash Program Memory | 32 KB (10.7K x 24) |
| SRAM | 4 KB |
| Package | 28-SOIC (0.295 in, 7.50 mm width) |
| Pin Count | 28 |
| Mounting Type | Surface Mount |
| Qualification | AEC-Q100 (automotive) |
| Family | dsPIC 33EP Series, dsPIC33EP32MC50x |
| Application Class | Motor control and digital power |
DSPIC33EP32MC502-H/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset input (active low) |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive voltage reference / I/O port B bit 0 |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative voltage reference / I/O port B bit 1 |
| Pin 4 | AN2/C2IN-/CN4/RB2 — Analog input 2 / comparator 2 inverting input / I/O port B bit 2 |
| Pin 5 | AN3/C2IN+/CN5/RB3 — Analog input 3 / comparator 2 non-inverting input / I/O port B bit 3 |
| Pin 6 | AN4/C1IN-/CN6/RB4 — Analog input 4 / comparator 1 inverting input / I/O port B bit 4 |
| Pin 7 | AN5/C1IN+/CN7/RB5 — Analog input 5 / comparator 1 non-inverting input / I/O port B bit 5 |
| Pin 8 | VDD — Positive supply |
| Pin 9 | VSS — Ground reference |
| Pin 10 | OSC1/CLKI/RC12 — Crystal oscillator input / external clock input / port C bit 12 |
| Pin 11 | OSC2/CLKO/RC15 — Crystal oscillator output / clock output / port C bit 15 |
| Pin 12 | PGD3/EMUD3/RP1/CN21/RB6 — Debug channel 3 data / remappable pin RP1 / I/O port B bit 6 |
| Pin 13 | PGC3/EMUC3/RP2/CN22/RB7 — Debug channel 3 clock / remappable pin RP2 / I/O port B bit 7 |
| Pin 14 | RP3/CN23/RB8 — Remappable pin RP3 / I/O port B bit 8 |
| Pin 15 | RP4/CN24/RB9 — Remappable pin RP4 / I/O port B bit 9 |
| Pin 16 | VDD — Positive supply |
| Pin 17 | VSS — Ground reference |
| Pin 18 | PGD1/EMUD1/RP35 — Primary debug data / remappable pin RP35 |
| Pin 19 | PGC1/EMUC1/RP36 — Primary debug clock / remappable pin RP36 |
| Pin 20 | PGD2/EMUD2/RP34 — Secondary debug data / remappable pin RP34 |
| Pin 21 | PGC2/EMUC2/RP33 — Secondary debug clock / remappable pin RP33 |
| Pin 22 | RP20 — Remappable pin RP20 (general purpose I/O) |
| Pin 23 | RP19 — Remappable pin RP19 (general purpose I/O) |
| Pin 24 | RP18 — Remappable pin RP18 (general purpose I/O) |
| Pin 25 | SOSCI/CN1/RC13 — Secondary oscillator input / I/O port C bit 13 |
| Pin 26 | VCAP/VDDCORE — Core voltage regulator capacitor connection |
| Pin 27 | AVSS — Analog ground reference |
| Pin 28 | AVDD — Analog positive supply |
Typical Applications
DSPIC33EP32MC502-H/SO is suitable for 6 applications: Brushless DC (BLDC) Motor Control, Permanent Magnet Synchronous Motor (PMSM) Drives, Automotive Electronic Control Units, Digital Power Conversion (AC/DC and DC/DC), Industrial Automation and Motion Nodes, Embedded Sensing and Instrumentation.
Brushless DC (BLDC) Motor Control
The DSPIC33EP32MC502-H/SO fits BLDC drives because its 70 MIPS DSP core closes current-loop iterations fast enough for trapezoidal and sensorless FOC commutation, while the dsPIC33EP32MC50x subfamily integrates high-speed PWM and advanced analog per Microchip's positioning. In a typical drive, the DSC reads phase currents and rotor position, executes the control loop, and drives a three-phase inverter through complementary PWM outputs with dead-time control. The 4 KB SRAM holds per-phase current samples, PI gains, and commutation state without external memory. A quantified benefit: control-loop rates in the tens of kHz are achievable, reducing torque ripple and audible noise compared with 8-bit solutions.
Recommended
Permanent Magnet Synchronous Motor (PMSM) Drives
Field-oriented control of PMSM machines demands multiply-accumulate throughput and deterministic interrupts, which the 70 MIPS dsPIC DSC core with integrated DSP engine provides. Microchip explicitly targets the dsPIC33E family at permanent magnet motor control systems that are more energy efficient, quieter, and longer-lived. The controller executes Clarke/Park transforms and space-vector PWM generation on-chip, and the AEC-Q100 qualification of the H grade suits traction-adjacent and pump applications. Designers typically allocate the 32 KB flash between the FOC framework and a compensator-tuning resident firmware, leaving the pin-compatible DSPIC33EP256MC502-H/SO as the upgrade path if code size or OTA update images outgrow 32 KB.
Recommended
Automotive Electronic Control Units
The -H suffix and AEC-Q100 qualification cited in distributor listings make the DSPIC33EP32MC502-H/SO appropriate for automotive subsystem ECUs such as pump controllers, fan drives, throttle actuators, and HVAC blowers. In these nodes, the DSC runs the motor loop while handling CAN-based supervisory commands - timing determinism from the 70 MIPS core keeps current-loop jitter low, which directly affects acoustic comfort in cabin blowers. Designers should confirm the exact operating temperature range from the family datasheet DS70000657 for their mounting location, since underhood ambient can exceed commercial grades. Firmware can leverage the 32 KB flash with self-programming capability for field updates subject to functional-safety process constraints.
Recommended
Digital Power Conversion (AC/DC and DC/DC)
Digital power supplies need precise PWM resolution, fast ADC sampling, and DSP math for compensators - all core strengths of the dsPIC33EP32MC50x family, which Microchip describes as 16-bit DSCs with high-speed PWM and advanced analog. A 70 MIPS core interleaves voltage- and current-loop computations for LLC, buck, or PFC stages at switching frequencies well into the hundreds of kHz with appropriate oversampling. The 4 KB SRAM stores coefficient tables and rolling averages for power-quality reporting. Compared with analog-control power stages, the digital approach enables adaptive compensation across line and load, and the 28-SOIC footprint integrates neatly onto dense power-board controllers.
Recommended
Industrial Automation and Motion Nodes
In factory automation, the DSPIC33EP32MC502-H/SO serves as a smart actuator controller - driving stepper or servo motors, digitizing encoder feedback, and executing motion profiles locally. The 70 MIPS budget supports multi-axis coordination of small drives, and the industrial -I grade sibling (DSPIC33EP32MC502-I/SO) covers factory-floor ambient ranges at lower cost when automotive qualification is unnecessary. Because all dsPIC33EP variants share one toolchain, an OEM can qualify one PCB design and populate MC50x, MC20x, or 256 KB variants per cost/performance tier without layout changes. The SOIC-28 package's 7.50 mm width suits low-profile industrial control boards and conformal-coated assemblies.
Recommended
Embedded Sensing and Instrumentation
Beyond motion, the DSC's DSP multiply-accumulate engine suits signal-processing instruments: power meters, vibration analyzers, and sensor front ends that filter and transform sampled data in real time. The 16-bit core handles FIR/IIR filtering on ADC streams while retaining microcontroller-style peripherals for host communication. Designers choose the GP50x sibling (DSPIC33EP32GP502-E/SO) when the motor-control PWM and op-amp analog are unneeded, or keep the MC502 to exploit its analog integration for direct sensor interfacing. The 32 KB flash and 4 KB SRAM bound algorithm complexity, so fixed-point filtering with careful coefficient scaling is the recommended implementation strategy at this memory class.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32MC502-H/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32MC502-I/SO | DSPIC33EP256MC502-H/SO | DSPIC33EP32MC202-I/SO | DSPIC33EP32GP502-E/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 | 28-SOIC (7.50 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 32 KB (10.7K x 24) | 32 KB (10.7K x 24) | 256 KB | 32 KB (10.7K x 24) | 32 KB (10.7K x 24) |
| Peripheral Subfamily | MC50x (motor-control PWM, advanced analog) | MC50x - same | MC50x - same | MC20x - reduced | GP50x - general purpose |
| Temperature Grade | H (automotive, AEC-Q100) | I (industrial) | H (automotive) | I (industrial) | E (extended) |
| Automotive Qualification | Yes (AEC-Q100 per distributor listing) | No (industrial grade) | Yes (H grade) | No (industrial grade) | No (extended grade) |
Key Differentiators
- Automotive qualification with same footprint (vs DSPIC33EP32MC502-I/SO)
- Full MC50x motor-control peripheral set (vs DSPIC33EP32MC202-I/SO)
- Balanced memory for compact control firmware (vs DSPIC33EP256MC502-H/SO)
Design Notes
Connect VDD pins (8, 16) to a decoupled 3.3 V rail with 0.1 uF ceramic capacitors placed within 5 mm of each pin, plus one bulk 4.7-10 uF capacitor per supply domain. Pin 26 (VCAP/VDDCORE) requires the internal regulator capacitor specified in the family datasheet (DS70000657 series) - this on-chip LDO output must not be loaded externally. Keep AVDD (pin 28) fed through an RC or ferrite filter from the digital rail to preserve ADC accuracy in motor-control current sampling.
Route high-speed PWM outputs to the gate drivers away from the analog sensor traces feeding AN0-AN5. Star-ground the analog domain: AVSS (pin 27) should join the power ground at a single point near the current-shunt amplifiers. The oscillator circuit at pins 10-11 needs short crystal traces with guard grounding; if using the internal FRC oscillator for cost-sensitive builds, OSC1/OSC2 can be released as general-purpose I/O, freeing two pins on this 28-pin budget-constrained package.
Confirm the exact -H temperature range from the DS70000657 family datasheet before finalizing automotive thermal budgets - automotive ambient near heat-generating drivers can exceed grades. Reserve debug access: pins 18-19 (PGD1/PGC1) double as remappable I/O, but committing them to peripheral functions complicates in-circuit programming fixtures. Also verify remappable pin (RPxx) assignments early - peripheral pin select conflicts are the most common redesign cause on 28-pin dsPIC designs.
Compliance Information
AEC-Q100 automotive qualification and 'Automotive' classification confirmed via Hotenda distributor listing. RoHS/REACH/lead-free status not stated in provided data - verify on Microchip's product page.
