DSPIC33EP32MC502-I/SS - 16-bit DSC 70 MIPS 32KB Flash | Microchip
MPN: DSPIC33EP32MC502-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.16 | $41.60 |
| 100 | $3.71 | $371.00 |
| 500 | $3.34 | $1,670.00 |
| 1,000 | $2.99 | $2,990.00 |
DSPIC33EP32MC502-I/SS Overview
A digital signal controller combines the computational throughput of a digital signal processor (DSP) with the peripheral integration and ease of use of a microcontroller (MCU). Within the power-management hierarchy, a DSC sits above general-purpose MCUs for real-time control loops, making the dsPIC33EP family the natural choice for field-oriented control (FOC) and sensorless brushless DC (BLDC) motor drives.
Key features include a high-speed PWM module with complementary outputs and dead-time control essential for three-phase inverters, integrated analog peripherals that reduce external component count, DSP multiply-accumulate (MAC) instructions for executing digital filter and control algorithms at high speed, and an internal fast RC oscillator that reduces bill-of-material cost. The 70 MIPS core executes a full 16-bit instruction word with 24-bit data path DSP operations.
Architecturally, the dsPIC33E core pairs a 16-bit MCU pipeline with a dedicated DSP engine, hardware looping, and modulo and bit-reversed addressing. Self-programming Flash allows field firmware updates, and the device is supported by Microchip MPLAB X IDE, XC16 compiler, and standard ICSP/ICD programming via PGECx/PGEDx pin pairs.
Typical applications include precision BLDC and permanent-magnet synchronous motor (PMSM) control, power supplies and digital power conversion (PFC, LLC), embedded industrial automation, and consumer appliance control where energy efficiency and quiet operation are required.
Design consideration: the MCLR pin must be properly biased with a pull-up resistor and the VCAP pin requires the datasheet-specified capacitor for core-voltage stabilization; omitting these is the most common bring-up failure on the dsPIC33EP family.
This page synthesizes distributor pricing context, pin-compatible dsPIC33EP family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP32MC502-I/SS — 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/SS (same form factor and footprint) — differing in Package, Operating Temperature, RAM, Core, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32MC502-E/SS
✅ Drop-In✓ In Stock
$2.7 / Unit
View Datasheet →DSPIC33EP64MC502-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC502-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.55 / Unit
View Datasheet →DSPIC33EP32MC202-I/SS
✅ Drop-In✓ In Stock
$2.68 / Unit
View Datasheet →DSPIC33EP32MC202T-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP256MC202T-I/SS
✅ Drop-In✓ In Stock
$3.38 / Unit
View Datasheet →DSPIC33EP64MC202-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32MC502-I/SS Maximum Ratings & Electrical Characteristics
| Core | dsPIC33E 16-bit DSC core |
| Core Speed | 70 MIPS / 60 MHz CPU clock |
| Program Memory (Flash) | 32 KB (10.7K x 24) |
| RAM | 4 KB |
| Data Bus Width | 16 bit |
| Operating Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (industrial, -I suffix) |
| Package | 28-SSOP (SS, gull-wing) |
| Number of Pins/Terminals | 28 |
| Mounting Type | Surface Mount |
| High-Speed PWM | Yes (motor-control PWM with complementary outputs and dead-time) |
| DSP Instructions | Yes (single-cycle MAC, DSP engine) |
| Programming/Debug Interface | ICSP/ICD via PGECx/PGEDx pairs |
| On-chip Analog | Integrated analog peripherals (ADC, comparators, op amps per family datasheet) |
| Terminal Form | Gull Wing |
DSPIC33EP32MC502-I/SS 28-ssop (ss, gull-wing) Pin Configuration Guide
Pin configuration for DSPIC33EP32MC502-I/SS (28-ssop (ss, gull-wing) 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/SS.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP32MC502-I/SS is suitable for 6 applications: Brushless DC (BLDC) Motor Control, Permanent Magnet Synchronous Motor (PMSM) Drives, Digital Power Conversion (PFC, LLC), Industrial Automation and Control Panels, Consumer Appliances, Solar Pump Inverters and Off-Grid Systems.
Brushless DC (BLDC) Motor Control
The DSPIC33EP32MC502-I/SS is purpose-built for BLDC motor control: its 70 MIPS dsPIC DSC core executes sensorless or sensored commutation algorithms, while the high-speed PWM module generates complementary three-phase drive signals with programmable dead-time to protect the inverter bridge. On-chip analog peripherals sample phase currents and bus voltage at rates sufficient for field-oriented control (FOC) loops running at 10-20 kHz. Placed at the heart of the drive board, the DSC replaces discrete control logic, reducing component count and board area. The 32KB Flash accommodates full FOC firmware with fault handling and communication, and the industrial -40C to +85C rating suits appliances, pumps, fans, and power tools.
Recommended
Permanent Magnet Synchronous Motor (PMSM) Drives
PMSM drives demand deterministic, high-rate control loops that the DSPIC33EP32MC502-I/SS delivers through its single-cycle MAC DSP engine and hardware loop constructs. The 70 MIPS core runs Clarke and Park transforms plus dual PI current controllers within a 50-100 us PWM period, while the motor-control PWM provides the precise vector timing required for sinusoidal commutation. Integrated comparators enable hardware-based overcurrent shutdown without CPU latency, a critical safety feature in traction-class drives. The 28-SSOP package keeps the controller compact for integration into servo drives, e-bike controllers, and HVAC compressor electronics where energy efficiency and quiet operation are primary selling points.
Recommended
Digital Power Conversion (PFC, LLC)
In digital power supplies, the DSPIC33EP32MC502-I/SS closes high-bandwidth voltage and current loops for PFC and LLC converter stages. The 70 MIPS core supports control update rates well above 100 kHz for fast inner current loops, and the high-speed PWM offers frequency, phase-shift, and complementary modes with dead-time - exactly the modulation primitives LLC half-bridges and interleaved PFC stages require. Fast analog comparators provide cycle-by-cycle current limiting independent of the CPU, and the 32KB Flash stores compensation algorithms plus communication and housekeeping code. Using this DSC replaces analog control ICs with a programmable platform, enabling adaptive compensation and digital telemetry in server PSUs, telecom rectifiers, and LED drivers.
Recommended
Industrial Automation and Control Panels
Within factory automation nodes, the DSPIC33EP32MC502-I/SS acts as a real-time actuator and sensor controller: its 70 MIPS core handles commutation of small motors, digital filtering of encoder signals, and protocol handling simultaneously. The dsPIC33EP peripheral set includes multiple UART, SPI, and I2C channels for PLC-style interconnection, while the DSP engine runs noise filtering on analog sensor inputs. The industrial temperature rating and 3.0-3.6V supply integrate cleanly with standard 3.3V industrial logic. Flash self-programming allows field firmware updates over the existing communication bus, reducing maintenance cost. Typical deployments include conveyor position control, valve actuation, and small servo subsystems inside larger machine control architectures.
Recommended
Consumer Appliances
Appliances such as washing machines, dishwashers, refrigerators, and range hoods increasingly use variable-speed BLDC motors for efficiency and noise reduction, and the DSPIC33EP32MC502-I/SS targets exactly this migration. Microchip states the dsPIC33E family enables motor systems that are more energy efficient and quieter in operation with extended life. The single-chip solution integrates PWM, ADC, comparators, and op amp functions, trimming BOM cost in price-sensitive appliance electronics. The 28-SSOP gull-wing package suits standard lead-free reflow assembly, and the 32KB Flash holds sensorless commutation plus user-interface logic. The internal fast RC oscillator removes the crystal in cost-driven designs while maintaining adequate timing accuracy for motor control.
Recommended
Solar Pump Inverters and Off-Grid Systems
Off-grid solar pumping applications pair a photovoltaic array with a three-phase motor drive, and the DSPIC33EP32MC502-I/SS implements both maximum power point tracking (MPPT) and motor commutation on one chip. The 70 MIPS core simultaneously runs the MPPT algorithm on the DC-link side and the FOC loop on the motor side, with the high-speed PWM providing the inverter gate signals. Integrated ADC channels sample panel voltage/current and motor phase currents without external front-end ICs, and the DSP engine filters the noisy, low-irradiance signals typical of dawn/dusk operation. The industrial temperature rating withstands outdoor enclosure environments, and Flash self-programming enables field tuning of MPPT parameters for specific pump-pipe characteristics.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32MC502-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32MC502-E/SS | DSPIC33EP64MC502-I/SS | DSPIC33EP128MC502-I/SS | DSPIC33EP32MC202-I/SS | DSPIC33EP256MC202T-I/SS |
|---|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 70 MIPS / 60 MHz | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 32 KB (10.7K x 24) | 32 KB | 64 KB | 128 KB | 32 KB | 256 KB |
| Temperature Range | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| On-chip Analog Set | Full MC502 analog set (op amps, comparators per family datasheet) | Full MC502 analog set - identical | Full MC502 analog set | Full MC502 analog set | Reduced MC202 analog set | Reduced MC202 analog set |
| High-Speed Motor-Control PWM | Yes | Yes | Yes | Yes | Yes | Yes |
| Packing / Sourcing Variant | Tube (tray), standard order | Tube, extended temp | Tube | Tube | Tube | Tape & Reel (T suffix) |
Key Differentiators
- Full motor-control analog integration (vs DSPIC33EP32MC202-I/SS)
- Extended temperature option is a true drop-in (vs DSPIC33EP32MC502-E/SS)
- Memory headroom without redesign (vs DSPIC33EP128MC502-I/SS)
Design Notes
The VCAP pin requires the datasheet-specified low-ESR capacitor (approximately 10 uF ceramic per family guidelines) to stabilize the internal core regulator. Omitting it or using the wrong value is the most common dsPIC33EP bring-up failure - symptoms are erratic execution or failure to program. Additionally, MCLR must have a pull-up resistor (1-10 kohm) and should be routed to the ICSP connector; leaving MCLR floating causes spurious resets.
Decouple every VDD/VSS pair with 0.1 uF ceramic capacitors placed within 2-3 mm of the pins, plus one bulk 4.7-10 uF capacitor near the package. Because the high-speed PWM edges drive gate-charge currents through nearby inverter circuits, keep the DSC's analog ground reference as a quiet island; use a solid ground plane and route phase-node (switching) traces away from the ADC input pins to preserve current-sense accuracy.
For ICSP programming, the PGECx/PGEDx pins must be used as matched pairs (e.g., PGEC2 with PGED2) per the device support documentation. Keep these trace lengths matched and under 15 cm to the programming header. Do not load PGEDx pins with strong pull-downs or LEDs, as this corrupts debugging and programming; series 100-ohm resistors on these lines help isolate them in the final application.
Estimated: the dsPIC33EP32MC502 running at 70 MIPS draws on the order of 40-60 mA from the 3.3 V rail (family typical figures), so a 100 mA headroom LDO such as the MCP1702 is sufficient for the DSC alone - budget separately for I/O drive into MOSFET gate drivers. Verify actual current against the family datasheet electrical characteristics table at your operating frequency and temperature before finalizing supply sizing.
Compliance Information
Active Microchip catalog part; RoHS/lead-free compliance per standard current Microchip production. Formal REACH and halogen-free declarations should be obtained from the Microchip product page material declaration documents.
