DSPIC33EP512MC502-I/MM - 70 MIPS 16-bit DSC 512KB Flash | Microchip
MPN: DSPIC33EP512MC502-I/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $5.16 | $516.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.19 | $4,190.00 |
DSPIC33EP512MC502-I/MM Overview
A digital signal controller combines the computational throughput of a digital signal processor with the peripheral integration and interrupt architecture of a microcontroller. Within the power-management hierarchy, the DSC sits between a general-purpose MCU and a dedicated DSP: it executes MAC and DSP-class instructions for control-loop mathematics while retaining single-cycle I/O, on-chip Flash self-programming, and rich timers. The dsPIC33E family from Microchip Technology serves as the classic example of this controller class for embedded real-time control.
Key differentiating features of this part include the 70 MIPS dsPIC DSC core with integrated DSP engine, 512 KB self-programmable Flash, 48 KB SRAM with 4 DMA channels, and motor-control PWM (MCPWM) outputs with complementary, dead-time-controlled channels. The QEI input accepts incremental encoder feedback directly, and five 16-bit timers support multi-rate control loops. The industrial grade -I suffix specifies -40C to +85C operation.
Architecturally, the dsPIC33EP core uses a modified Harvard pipeline with a 16-bit data path and 24-bit instruction words, achieving deterministic single-cycle execution of multiply-accumulate operations. This determinism is essential for field-oriented control (FOC) of brushless DC (BLDC) and permanent-magnet synchronous motors (PMSM), where the current loop must complete inside a few microseconds to minimize torque ripple and acoustic noise.
Typical applications include sensorless and sensored BLDC/PMSM motor drives, industrial automation, digital power conversion, and precision positioning systems. The combination of 70 MIPS headroom, hardware QEI, and complementary PWM makes the DSPIC33EP512MC502-I/MM a natural fit for servo drives, e-bike controllers, and HVAC blowers.
When designing with this DSC, budget PWM dead time carefully against MOSFET switching losses, and exploit the DMA channels to offload ADC results so the CPU remains dedicated to the control loop. Verify supply sequencing of the 3.3 V rail against the datasheet requirements for VDDCORE decoupling.
This page adds engineering value beyond the raw datasheet: it consolidates distributor pricing, pin-compatible drop-in alternatives across the dsPIC33EP512MC502 family, a parameter comparison table, and practical motor-control design notes in one AI-citable reference.
Drop-in alternatives for DSPIC33EP512MC502-I/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 DSPIC33EP512MC502-I/MM (same form factor and footprint) — differing in Operating Temperature, Package, RoHS Status, Core Architecture, Maximum CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP512MC502-H/MM
✅ Drop-In✓ In Stock
$4.02 / Unit
View Datasheet →DSPIC33EP512MC502-E/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP256MC502-I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP128MC502-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32MC502-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP512GP502-I/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP512MC502-I/MM Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33E DSC (modified Harvard) |
| Core Speed | 70 MIPS (60 MHz instruction cycle class per family datasheet) |
| Program Memory (Flash) | 512 KB (170K x 24) |
| SRAM | 48 KB |
| Supply Voltage | 3.0 V to 3.6 V (nominal 3.3 V) |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 28-QFN-S (6x6 mm), exposed pad (MM) |
| PWM | Motor Control PWM (MCPWM) with complementary outputs and dead time |
| Quadrature Encoder Interface | Yes (QEI) |
| DMA Channels | 4 |
| Timers | 5 x 16-bit |
| Core Type Keyword | DSP, DSC, 16B DSC, MCPWM, QEI |
| Mounting Type | Surface Mount |
| Instruction Set | dsPIC 24-bit instruction, DSP engine (MAC) support |
| RoHS Status | Compliant |
| AEC-Q100 Status | Qualified (E/MM variant per datasheets.com listing; I/MM standard industrial) |
DSPIC33EP512MC502-I/MM Pin Configuration
| Pin 1 | MCLR — Master clear reset / ICSP programming voltage input |
| Pin 2 | AN0/VREF+/CN0/RB0 — Analog input 0 / positive voltage reference / change notification / PORTB bit 0 |
| Pin 3 | AN1/VREF-/CN1/RB1 — Analog input 1 / negative voltage reference / change notification / PORTB bit 1 |
| Pin 4 | AN2/SS1/CN3/RB2 — Analog input 2 / SPI slave select 1 / change notification / PORTB bit 2 |
| Pin 5 | AN3/IND/CN4/RB3 — Analog input 3 / comparator-inductor input / PORTB bit 3 |
| Pin 6 | AN4/C1IN-/CN6/RB4 — Analog input 4 / comparator 1 inverting input / PORTB bit 4 |
| Pin 7 | VDD — Power supply (3.0 V to 3.6 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN2/RC12 — Crystal oscillator input / external clock input / PORTC bit 12 |
| Pin 10 | OSC2/CLKO/RC13 — Crystal oscillator output / clock output / PORTC bit 13 |
| Pin 11 | AN5/C1IN+/CN7/RB5 — Analog input 5 / comparator 1 non-inverting input / PORTB bit 5 |
| Pin 12 | AN6/OCFA/C2IN-/CN8/RB6 — Analog input 6 / PWM fault A input / comparator 2 inverting input / PORTB bit 6 |
| Pin 13 | AN7/C2IN+/CN9/RB7 — Analog input 7 / comparator 2 non-inverting input / PORTB bit 7 |
| Pin 14 | AN8/C1OUT/CN10/RB8 — Analog input 8 / comparator 1 output / PORTB bit 8 |
| Pin 15 | AN9/C2OUT/CN11/RB9 — Analog input 9 / comparator 2 output / PORTB bit 9 |
| Pin 16 | AN10/CVREF/CN12/RB10 — Analog input 10 / comparator voltage reference / PORTB bit 10 |
| Pin 17 | AN11/CN13/RB11 — Analog input 11 / change notification / PORTB bit 11 |
| Pin 18 | VSS — Ground reference |
| Pin 19 | VDD — Power supply (3.0 V to 3.6 V) |
| Pin 20 | PGD/EMUD/AN12/CN14/RB12 — In-circuit debug data / emulator data / analog input 12 / PORTB bit 12 |
| Pin 21 | PGC/EMUC/AN13/CN15/RB13 — In-circuit debug clock / emulator clock / analog input 13 / PORTB bit 13 |
| Pin 22 | AN14/CN16/RB14 — Analog input 14 / change notification / PORTB bit 14 |
| Pin 23 | AN15/CN17/RB15 — Analog input 15 / change notification / PORTB bit 15 |
| Pin 24 | RP3/RC14 — Remappable peripheral pin 3 / PORTC bit 14 |
| Pin 25 | RP2/RC15 — Remappable peripheral pin 2 / PORTC bit 15 |
| Pin 26 | RP1/RC9 — Remappable peripheral pin 1 / PORTC bit 9 |
| Pin 27 | VSS — Ground reference |
| Pin 28 | VDD — Power supply (3.0 V to 3.6 V) |
Typical Applications
DSPIC33EP512MC502-I/MM is suitable for 6 applications: BLDC / PMSM Motor Drives, Industrial Automation and Motion Control, E-mobility and E-bike Controllers, Digital Power Conversion, HVAC and Appliance Blower Drives, Precision Instrumentation and Robotics.
BLDC / PMSM Motor Drives
The DSPIC33EP512MC502-I/MM fits brushless DC and permanent-magnet synchronous motor drives because its 70 MIPS DSP core closes FOC current loops within a single PWM period, and its complementary MCPWM outputs generate three-phase drive signals with hardware dead-time insertion. The QEI input accepts incremental encoder feedback for sensored commutation, while sensorless schemes use the ADC with DMA streaming. In a typical topology the DSC reads phase currents via shunt or in-line sensing each PWM cycle, executes Clarke/Park transforms and PI regulators in software, and updates duty cycles - delivering quieter, more energy-efficient, longer-life motor operation as Microchip positions this family. Trade-off: at 3.3 V logic, gate drivers such as dedicated MOSFET drivers are required between the PWM pins and the power stage.
Recommended
Industrial Automation and Motion Control
In factory automation, the DSPIC33EP512MC502-I/MM serves as a compact servo-loop controller: the quadrature encoder interface tracks motor position in hardware at 70 MIPS headroom, five 16-bit timers run cascaded position/velocity/current loops, and the MCPWM module drives the power stage. The 512 KB Flash accommodates trajectory planning, communication stacks, and field-upgradeable firmware in a single device, while 4 DMA channels keep CPU load low during continuous ADC sampling. Typical deployments include conveyor indexing, pick-and-place axes, and pump or fan speed control where energy efficiency matters. Because the industrial -I grade is rated -40C to +85C, it suits unconditioned control cabinets; the exposed-pad QFN package aids heat removal in enclosed drives.
Recommended
E-mobility and E-bike Controllers
Electric bike and light-electric-vehicle controllers benefit directly from the DSPIC33EP512MC502-I/MM parameter set: the 70 MIPS core executes sensorless FOC with sliding-mode or observer-based rotor-position estimation in real time, MCPWM complementary outputs with dead time protect the three-phase inverter, and the QEI supports pedelec torque-sensor interfaces. The 3.0-3.6 V supply tolerates automotive-class rail variation after a simple linear or buck front end, and the 28-pin QFN-S (6x6 mm) footprint keeps the controller PCB small enough for battery-tube or hub integration. Designers should apply the -E/MM extended-temperature variant (AEC-Q100-referenced) where engine-bay or sun-exposed thermal environments exceed +85C, trading a small cost delta for qualification margin.
Recommended
Digital Power Conversion
For digital power supplies - LLC resonant converters, PFC stages, and DC-DC modules - the DSPIC33EP512MC502-I/MM provides the deterministic control timing that analog controllers traditionally supplied. The 70 MIPS core executes compensator computations between ADC sampling instants, the high-resolution PWM capability of the dsPIC33E MC family supports phase-shifted topologies, and DMA-driven ADC reads maintain sampling jitter-free control timing. The 512 KB Flash leaves room for multiple firmware profiles (constant-current, constant-voltage, constant-power modes) plus bootloaders for remote updates in fielded equipment. Engineers should verify PWM resolution against the converter switching frequency and loop bandwidth; the main trade-off versus a dedicated analog controller is firmware development effort in exchange for programmability and BOM consolidation.
Recommended
HVAC and Appliance Blower Drives
HVAC blowers, range hoods, and refrigerator fans increasingly use sensorless BLDC motors controlled by parts like the DSPIC33EP512MC502-I/MM. Microchip explicitly markets the dsPIC33E family for quieter, more energy-efficient, extended-life appliances, and this DSC delivers that through back-EMF-based sensorless commutation executed at 70 MIPS, complementary PWM with hardware dead time, and hardware fault shutdown inputs. The 28-QFN-S (6x6 mm) package minimizes controller PCB area inside compact fan housings, while 48 KB SRAM buffers diagnostics and speed-profile data. The 512 KB Flash supports firmware for multiple motor sizes and RPM curves from one PCB platform, reducing appliance SKUs. Ensure the exposed pad is well grounded to manage the elevated ambient temperatures typical of appliance enclosures.
Recommended
Precision Instrumentation and Robotics
Robot joints, lab pumps, and precision positioning stages use the DSPIC33EP512MC502-I/MM where encoder-based closed-loop control and DSP math must coexist in one small, low-cost package. The QEI resolves incremental encoder counts in hardware, the DSP engine executes notch filters and feedforward compensators for resonance suppression, and the 70 MIPS core sustains multi-kHz control updates with deterministic latency - essential for repeatable motion. Four DMA channels offload ADC and communication transfers so the CPU is dedicated to the loop. The 28-QFN-S footprint integrates into joint modules and PCB-integrated actuators, and the 512 KB Flash holds kinematics code, trajectory generators, and diagnostics. For CAN-connected robots, pair the DSC with an external CAN transceiver on a remappable RP pin.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP512MC502-I/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP512MC502-H/MM | DSPIC33EP512MC502-E/MM | DSPIC33EP256MC502-I/MM | DSPIC33EP512GP502-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 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 512 KB (170K x 24) | 512 KB | 512 KB | 256 KB | 512 KB |
| SRAM | 48 KB | 48 KB | 48 KB | 48 KB | 48 KB |
| Core Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Operating Temperature | -40C to +85C (I grade) | Extended (H grade) - see datasheet | -40C to +125C (E grade) | -40C to +85C | -40C to +85C |
| Motor-Control Peripherals | MCPWM + QEI | MCPWM + QEI | MCPWM + QEI | MCPWM + QEI | GP peripherals (CAN, CTMU, PTG) |
| 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 |
Key Differentiators
- Motor-control-specific peripheral set (vs DSPIC33EP512GP502-I/MM)
- Double the program memory at same footprint (vs DSPIC33EP256MC502-I/MM)
- Extended-temperature upgrade path (vs DSPIC33EP512MC502-I/MM (self, vs -E/MM))
Design Notes
The 28-QFN-S (MM) package includes an exposed thermal pad that is internally bonded to VSS. Solder it to a grounded PCB pad with a 3x3 via array to the ground plane: this provides both the lowest thermal resistance and a low-inductance ground return for the PWM switching currents. Decouple all VDD pins (7, 19, 28) with 100 nF ceramic capacitors placed within 2 mm of each pin, plus one bulk 4.7-10 uF capacitor near pin 19.
Keep the oscillator loop (OSC1 pin 9, OSC2 pin 10) tight: place the crystal and its load capacitors within 5 mm of the pins and surround with ground pour. Reserve a 5-pin ICSP header on MCLR (pin 1), PGC (pin 21), PGD (pin 20), VDD, and VSS - MPLAB X ICD/REAL ICE debugging uses these exact pins and in-field firmware updates depend on MCLR access. Isolate PGD/PGC traces from noisy PWM routing to prevent spurious debug-clock pickup.
Do not exceed the 3.6 V maximum supply; 5 V-tolerant I/O is not provided on this family, so level-shift any 5 V sensor or encoder signals. When using complementary MCPWM outputs, configure dead time in hardware rather than software - software dead time fails on interrupt latency under fault conditions. Estimated: a 50 kHz PWM with 500 ns dead time consumes 2.5% of each half-period; verify this does not violate your MOSFET thermal budget before finalizing gate-driver selection.
Supply the 3.3 V rail from a low-noise LDO or filtered buck; the ADC reference accuracy directly affects current-loop quality in FOC designs. Estimated: ADC quantization on a 3.3 V reference at 10 bits gives about 3.2 mV per LSB, so shunt-based phase current sensing with a gain stage sized for full-scale near 3.3 V maximizes resolution. Use the 4 DMA channels to stream ADC results into RAM so the CPU never services data-move interrupts inside the control ISR.
Compliance Information
RoHS-compliant modern Microchip product. The E/MM variant is described by datasheets.com in an automotive AEC-Q100 context; the I/MM part itself is a standard industrial-grade device. REACH/halogen status not stated in provided data.
