DSPIC33EP32MC202-I/SO - 70 MIPS Motor Control DSC | Microchip
MPN: DSPIC33EP32MC202-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.72 | $47.20 |
| 100 | $4.18 | $418.00 |
| 500 | $3.85 | $1,925.00 |
| 1,000 | $3.46 | $3,460.00 |
DSPIC33EP32MC202-I/SO Overview
A digital signal controller combines the computational strengths of a microcontroller and a digital signal processor in a single core. Within the power-management hierarchy of embedded controllers, the dsPIC33EP family sits above basic MCUs by adding a DSP engine, high-speed PWM peripherals, and analog integration, making it a dedicated motor-control and digital-power processing platform rather than a general-purpose processor.
Key differentiating features include a 70 MIPS dsPIC core, dedicated motor-control PWM (MCPWM), a quadrature encoder interface (QEI) for rotor position feedback, two integrated operational amplifiers, three comparators, and a peripheral trigger generator (PTG). These peripherals reduce external component count in closed-loop motor drives and allow direct interfacing with current-sense shunts and encoder signals.
Architecturally, the dsPIC33E core pairs a 16-bit modified Harvard pipeline with DSP multiply-accumulate instructions and single-cycle MAC, enabling fast execution of control-loop math such as PI and field-oriented-control algorithms. Operating at up to 60 MHz internal clock speed, it sustains deterministic loop times for FOC and sensorless control schemes.
Typical applications include brushless DC (BLDC) and permanent magnet synchronous motor (PMSM) drives, switched-mode power supplies and digital power conversion, battery chargers, and industrial automation equipment where precision control and energy efficiency are required.
A key design consideration: the -I suffix grades the part for -40C to +85C ambient operation; designs targeting wider industrial ranges should consider the -E temperature variant of the same die. Program via ICSP with tools such as PICkit or ICD.
This page synthesizes distributor pricing, verified drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP32MC202-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 DSPIC33EP32MC202-I/SO (same form factor and footprint) — differing in Package, Core Architecture, Operating Temperature, Program Memory (Flash), RAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP32MC202T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP32GP502T-E/SO
✅ Drop-In✓ In Stock
$3.42 / Unit
View Datasheet →DSPIC33EP32MC202-I/SO Maximum Ratings & Electrical Characteristics
| Core Processor | dsPIC33E |
| Core Size | 16-bit |
| Speed | 70 MIPS |
| Internal Clock Frequency | 60 MHz |
| Program Memory Size | 32KB (10.7K x 24) FLASH |
| RAM Size | 4KB |
| Package | 28-SOIC (0.295 inch, 7.50 mm width) |
| Operating Temperature Range | -40C to +85C (TA) |
| Mounting Type | Surface Mount |
| Series | dsPIC 33EP (dsPIC33EP32MC20x) |
| Motor Control PWM | MCPWM (complementary outputs, dead time) |
| Quadrature Encoder Interface | QEI |
| Integrated Op Amps | 2 |
| Comparators | 3 |
| Peripheral Trigger Generator | PTG |
| Packaging | Tube |
| RoHS Status | Compliant |
DSPIC33EP32MC202-I/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low), programming voltage input |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive voltage reference / change notification / port B |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative voltage reference / change notification / port B |
| Pin 4 | PGD/EMUD1/AN2/C2IN-/CN4/RB2 — In-circuit serial programming data / analog input 2 / comparator 2 input |
| Pin 5 | PGC/EMUC1/AN3/C2IN+/CN5/RB3 — In-circuit serial programming clock / analog input 3 / comparator 2 input |
| Pin 6 | AN4/C1IN-/CN6/RB4 — Analog input 4 / comparator 1 inverting input |
| Pin 7 | AN5/C1IN+/CN7/RB5 — Analog input 5 / comparator 1 non-inverting input |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN12/RA2 — Crystal oscillator input / external clock input |
| Pin 10 | OSC2/CLKO/CN13/RA3/RC15 — Crystal oscillator output / clock output |
| Pin 11 | EMUD1/SDA1/RP2/CN16/RG6 — Emulation data / I2C data / remappable peripheral pin |
| Pin 12 | EMUC1/SCL1/RP3/CN17/RG7 — Emulation clock / I2C clock / remappable peripheral pin |
| Pin 13 | SOSCI/CN1/RB6 — Secondary oscillator input / change notification |
| Pin 14 | SOSCO/T1CK/CN0/RB7 — Secondary oscillator output / Timer1 external clock |
| Pin 15 | VDD — Positive supply (3.0V to 3.6V) |
| Pin 16 | RP4/SOSCO/T2CK/CN22/RG8 — Remappable peripheral pin / Timer2 external clock |
| Pin 17 | RP5/SOSCI/CN23/RG9 — Remappable peripheral pin / secondary oscillator input |
| Pin 18 | VSS — Ground reference |
| Pin 19 | RP6/OCFA/CN8/RB8 — Remappable peripheral pin / PWM fault A input |
| Pin 20 | RP7/OCFB/CN9/RB9 — Remappable peripheral pin / PWM fault B input |
| Pin 21 | TMS/RP8/CN10/RB10 — JTAG test mode select / remappable peripheral pin |
| Pin 22 | TCK/RP9/CN11/RB11 — JTAG test clock / remappable peripheral pin |
| Pin 23 | RP10/VBUS/CN12/RB12 — Remappable peripheral pin / change notification |
| Pin 24 | RP11/AN10/CN13/RB13 — Remappable peripheral pin / analog input 10 |
| Pin 25 | RP12/AN11/CN14/RB14 — Remappable peripheral pin / analog input 11 |
| Pin 26 | RP13/AN12/CN15/RB15 — Remappable peripheral pin / analog input 12 |
| Pin 27 | AVSS — Analog ground |
| Pin 28 | AVDD — Analog supply (3.0V to 3.6V) |
Typical Applications
DSPIC33EP32MC202-I/SO is suitable for 6 applications: BLDC Motor Control, Digital Power Conversion (SMPS), PMSM Servo Drives, Battery Charging Systems, Industrial Automation and Control Panels, Electric Power Tools and E-Mobility.
BLDC Motor Control
The DSPIC33EP32MC202-I/SO fits BLDC motor drives because its dedicated MCPWM module generates complementary PWM pairs with programmable dead time, while the QEI reads rotor position from incremental encoders and the two internal op amps amplify phase-current shunt signals for the ADC. In a typical sensorless or sensored BLDC drive, the 70 MIPS DSP core executes trapezoidal or field-oriented-control algorithms with deterministic single-cycle MAC operations, sustaining control loop rates in the tens of kilohertz. The three comparators provide hardware overcurrent trip that shuts PWM outputs without CPU intervention, protecting MOSFET bridges during faults. Placing the controller between the encoder and gate drivers yields a compact, BOM-minimized drive for fans, pumps, and power tools.
Recommended
Digital Power Conversion (SMPS)
The DSPIC33EP32MC202-I/SO suits digitally controlled switch-mode power supplies because the MCPWM module supports high-frequency complementary PWM with adjustable dead time and the fast comparators implement cycle-by-cycle current limiting in hardware. The 70 MIPS core runs voltage- and current-loop compensators (PI/2P2Z) sampled by the ADC, replacing analog error-amp networks with firmware for adaptive gain scheduling and programmable protection. Two internal op amps condition current-shunt feedback without external amplifiers, cutting BOM cost in AC-DC and DC-DC stages. Typical uses include telecom rectifiers, LED drivers, and battery chargers, where firmware-defined control laws enable soft-start, burst mode, and fault logging impossible with fixed analog controllers.
Recommended
PMSM Servo Drives
For permanent-magnet synchronous motor servo systems, the DSPIC33EP32MC202-I/SO provides the closed-loop sensing chain: QEI decodes incremental encoder quadrature signals for position and velocity feedback, while op amps and ADC sample phase currents for vector (FOC) control. The 70 MIPS pipeline sustains the current-loop bandwidth demanded by servo applications, executing Park/Clarke transforms and PI current regulators in microseconds. Hardware comparator overcurrent trips protect the inverter stage faster than firmware could respond. The -40C to +85C industrial grade suits factory automation, robotics joints, and CNC axis drives where deterministic torque control and encoder-based commutation are required in a compact 28-pin SOIC footprint.
Recommended
Battery Charging Systems
The DSPIC33EP32MC202-I/SO is well matched to smart battery charger power stages: its MCPWM drives buck/boost converter switches with dead-time control, the internal op amps measure charge current via shunt resistors, and comparators enforce fast hardware current limits during fault transients. The 70 MIPS core implements multi-stage charging algorithms (CC, CV, taper, top-off) with coulomb counting in software, while the PTG (Peripheral Trigger Generator) sequences ADC sampling synchronized to PWM for accurate averaged current measurement. Its 3.0V-3.6V supply and low peripheral count allow compact charger boards for power tools, e-bikes, and backup-power systems operating over the -40C to +85C industrial temperature range.
Recommended
Industrial Automation and Control Panels
Within industrial automation equipment, the DSPIC33EP32MC202-I/SO serves as a real-time actuator and power-control node: the MCPWM drives heaters, valves, and variable-speed motor stages, while its UART/SPI/I2C serial peripherals link to PLC backbones and HMI modules. The DSP engine accelerates filtering tasks such as sensor averaging and vibration monitoring via single-cycle MAC instructions. The -40C to +85C grade and industrial RoHS-compliant construction suit control-panel environments. Its integrated analog (2 op amps, 3 comparators) handles threshold detection for limit switches and fault conditions, reducing external component count in distributed I/O nodes where a full PLC module is oversized.
Recommended
Electric Power Tools and E-Mobility
Cordless power tools and light e-mobility devices use the DSPIC33EP32MC202-I/SO for brushless motor drive: the MCPWM with complementary outputs and dead time drives the three-phase inverter, the QEI or sensorless back-EMF methods provide commutation, and comparator-based overcurrent protection guards against stall and short-circuit events at hardware speed. The 70 MIPS core runs speed-loop and torque-limiting firmware simultaneously, enabling soft-start and electronic clutch behavior. Operating from the -40C to +85C industrial range and requiring only a 28-pin SOIC footprint, it fits compact trigger-controlled drive boards where reliability, low BOM cost, and high control-loop performance must coexist.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP32MC202-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP32MC202T-I/SO | DSPIC33EP32MC202-I/SP | DSPIC33EP32GP502T-E/SO | DSPIC33EP32MC202-I/MM |
|---|---|---|---|---|---|
| Package | 28-SOIC (7.50 mm) | 28-SOIC - same | 28-SPDIP - different | 28-SOIC - same | QFN-28 - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Program Memory | 32KB FLASH (10.7K x 24) | 32KB FLASH | 32KB FLASH | 32KB FLASH | 32KB FLASH |
| RAM | 4KB | 4KB | 4KB | 4KB | 4KB |
| Motor-Control Peripherals (MCPWM/QEI) | Yes (MCPWM, QEI, 2 op amps, 3 comparators) | Yes | Yes | No (GP peripheral set) | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (extended) | -40C to +85C |
| Packaging | Tube | Tape & Reel | Tube | Tape & Reel | Tube |
Key Differentiators
- Integrated motor-control analog saves board area (vs DSPIC33EP32GP502T-E/SO)
- Hardware overcurrent protection latency (vs DSPIC33EP32GP502T-E/SO)
- QEI encoder interface built in (vs DSPIC33EP32GP502T-E/SO)
- Trade-off: extended temperature availability (vs DSPIC33EP32GP502T-E/SO)
Design Notes
The DSPIC33EP32MC202-I/SO operates from a 3.0V to 3.6V supply on VDD and AVDD. Never connect it to 5V rails; if the system is 5V, use an LDO (e.g., 3.3V output) with at least 100 mA headroom and decouple each VDD/AVDD pin with 0.1 uF ceramic capacitors placed within 5 mm of the pin. AVDD should be filtered from digital VDD through a ferrite bead plus 10 uF bulk capacitance to preserve ADC accuracy in current-sense loops. Estimated: a 70 MIPS active run at 3.3V draws in the tens of mA range per the family datasheet current-versus-MIPS graphs.
On the 28-SOIC (7.50 mm) footprint, route the MCPWM outputs to gate drivers with matched trace lengths where complementary pairs drive the same half-bridge, and keep the PWM fault input (OCFA/OCFB, pins 19-20) close to the current-sense comparator circuit for fast hardware trips. Place the 0.1 uF decoupling capacitors for VDD (pin 15) and AVDD (pin 28) on the same side of the board as the IC. Separate the analog ground (AVSS, pin 27) return path from high-current motor ground returns to prevent PWM switching noise from corrupting ADC readings.
Two frequent mistakes: (1) Applying 5V logic directly to I/O pins - the dsPIC33E is a 3.3V device and absolute maximum I/O limits will be violated; check the datasheet pin-description section for which specific pins are 5V-tolerant before interfacing. (2) Leaving MCLR (pin 1) floating - always pull it up through a 10 kOhm resistor to VDD with a 0.1 uF capacitor, and route it to the ICSP header for programming with PICkit/ICD tools. Failure to provide the ICSP header (PGD/PGC on pins 4-5) makes field firmware updates impossible without desoldering.
The remappable peripheral (RP) pins allow routing UART, SPI, and PWM anywhere on the port map, but high-speed PWM traces still need attention: keep PWM output traces short (under 50 mm), route them over a solid ground plane, and series-terminate (22-33 Ohm) long traces to reduce ringing into gate drivers. Keep encoder QEI inputs away from PWM traces; use differential or filtered encoder signals on longer cable runs. The internal op amps should have short, direct shunt-sense traces to minimize Kelvin-sensing errors in phase-current measurement.
Compliance Information
RoHS compliant per Microchip product page and DigiKey/FindIC listings for the dsPIC33EP family. REACH, halogen-free, and conflict-minerals status should be confirmed from Microchip's official compliance certificates.
