DSPIC33FJ32MC102-E/SO - 16-bit DSC 16 MIPS Motor Control | Microchip
MPN: DSPIC33FJ32MC102-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.12 | $6.12 |
| 10 | $5.51 | $55.10 |
| 100 | $4.72 | $472.00 |
| 500 | $4.21 | $2,105.00 |
| 1,000 | $3.78 | $3,780.00 |
DSPIC33FJ32MC102-E/SO Overview
A digital signal controller combines the computational power of a digital signal processor (DSP) with the peripheral set and ease of use of a microcontroller (MCU). Within the power-management hierarchy, the dsPIC33FJ MC family sits in the 16-bit embedded control segment between general-purpose MCUs such as the PIC18 and full DSPs, offering a single-cycle MAC unit, barrel shifter, and dual operand fetch for efficient control-loop and filtering mathematics.
Key differentiating features include the Motor Control PWM (MCPWM) module with two PWM generators and independent timebases, three analog comparators, a Charge Time Measurement Unit (CTMU) for capacitive touch and precision time measurement, Peripheral Pin Select (PPS) for flexible digital I/O mapping, and an on-chip Real-Time Calendar (RTCC). The architecture also integrates a 16x16 working register array and DSP engine supporting single-cycle multiply-accumulate operations.
The CMOS core operates from a 3.0V to 3.6V supply (nominal 3.3V) and implements a modified Harvard architecture with a multiple internal bus structure. Two operand fetches per cycle, hardware division support, and low-power modes (idle, sleep, doze) make it efficient for closed-loop field-oriented control (FOC) of BLDC and PMSM motors, where control-loop bandwidths of 10-20 kHz demand deterministic interrupt latency and fast math.
Typical applications include BLDC/PMSM/ACIM motor drives, sensorless FOC controllers, digital power supplies (DC-DC, PFC, LLC), UPS systems, and capacitive-touch human interface controls leveraging the CTMU. The low pin count and small SOIC footprint suit cost-sensitive, space-constrained designs.
A key design consideration: the device requires a low-ESR capacitor on the VCAP/VDDCORE pin for the internal 2.5V regulator core supply, and Flash self-programming at 3.3V uses the internal charge pump - reserve the last Flash page for boot code if in-field firmware updates are planned.
This page synthesizes distributor pricing, drop-in same-package alternatives, pinout data, and practical motor-control design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ32MC102-E/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 DSPIC33FJ32MC102-E/SO (same form factor and footprint) — differing in Package, RTCC, Operating Temperature, Core Architecture, PWM Module.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32MC101-E/SO
✅ Drop-In✓ In Stock
$3.75 / Unit
View Datasheet →DSPIC33FJ32MC102-I/SO
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →DSPIC33FJ32MC101T-I/SO
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →DSPIC33FJ16MC102-E/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ16MC102-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32MC102-E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F DSC, CMOS |
| Maximum Clock Frequency | 32 MHz |
| Performance | 16 MIPS |
| Program Memory (Flash) | 32 KB (11K x 24) |
| RAM | 2 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Nominal Supply Voltage | 3.3 V |
| PWM Module | MCPWM, 2 PWM generators with independent timebases |
| Analog Comparators | 3 |
| CTMU | Yes (Charge Time Measurement Unit) |
| Peripheral Pin Select (PPS) | Yes |
| RTCC | Yes (Real-Time Calendar) |
| Operating Temperature | -40C to +125C (Extended, E) |
| Package | 28-lead SOIC (SO) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| In-System Programming | Yes (ICSP, 2-wire PGD/PGC) |
DSPIC33FJ32MC102-E/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low, programming voltage pin during ICSP |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive voltage reference / change notification / port B bit 0 |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative voltage reference / change notification / port B bit 1 |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select 1 / change notification / port B bit 2 |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / QEI index / change notification / port B bit 3 |
| Pin 6 | VDD — Positive supply (3.0V-3.6V) |
| Pin 7 | VSS — Ground reference |
| Pin 8 | OSC1/CLKI/RA2 — Crystal oscillator input / external clock input / port A bit 2 |
| Pin 9 | OSC2/CLKO/RC15 — Crystal oscillator output / clock output / port C bit 15 |
| Pin 10 | VCAP/VDDCORE — Internal core regulator output, connect low-ESR 10uF capacitor to VSS |
| Pin 11 | VDD — Positive supply (3.0V-3.6V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | AN4/SOSCI/CN1/RB4 — Analog input 4 / secondary oscillator input / change notification / port B bit 4 |
| Pin 14 | AN5/SOSCO/T1CK/CN0/RB5 — Analog input 5 / secondary oscillator output / Timer1 clock / change notification / port B bit 5 |
| Pin 15 | PGD/EMUD1/CN24/RB6 — ICSP data / emulation channel 1 / change notification / port B bit 6 |
| Pin 16 | PGC/EMUC1/CN23/RB7 — ICSP clock / emulation clock 1 / change notification / port B bit 7 |
| Pin 17 | INT0/REPLS/CN21/RB8 — External interrupt 0 / change notification / port B bit 8 |
| Pin 18 | T2CK/REPLS2/CN20/RB9 — Timer2 external clock / change notification / port B bit 9 |
| Pin 19 | RP20/CN19/RB10 — PPS remappable peripheral pin / change notification / port B bit 10 |
| Pin 20 | RP21/CN18/RB11 — PPS remappable peripheral pin / change notification / port B bit 11 |
| Pin 21 | VSS — Ground reference |
| Pin 22 | RP22/CN17/RB12 — PPS remappable peripheral pin / change notification / port B bit 12 |
| Pin 23 | RP23/CN16/RB13 — PPS remappable peripheral pin / change notification / port B bit 13 |
| Pin 24 | AN10/RP24/CN15/RB14 — Analog input 10 / PPS remappable pin / change notification / port B bit 14 |
| Pin 25 | AN11/RP25/CN14/RB15 — Analog input 11 / PPS remappable pin / change notification / port B bit 15 |
| Pin 26 | RP25/UPDN/REPLS3/CN13 — PPS remappable pin / QEI up-down / change notification |
| Pin 27 | RP26/FLTA/REPLS4/CN12 — PPS remappable pin / MCPWM fault A input / change notification |
| Pin 28 | RP27/FLTB/REPLS5/CN11 — PPS remappable pin / MCPWM fault B input / change notification |
Typical Applications
DSPIC33FJ32MC102-E/SO is suitable for 6 applications: BLDC/PMSM Motor Drives, Digital Power Supplies, Uninterruptible Power Supplies (UPS), Capacitive Touch Interfaces, Industrial Automation and Sensors, Appliance Motor Control (Fans, Pumps, Compressors).
BLDC/PMSM Motor Drives
The DSPIC33FJ32MC102-E/SO is designed specifically for brushless DC and permanent-magnet synchronous motor control. Its MCPWM module provides two PWM generators with independent timebases supporting complementary outputs with dead-time insertion, essential for three-phase inverters, while the three on-chip analog comparators enable cycle-by-cycle overcurrent shutdown without CPU intervention. At 16 MIPS with single-cycle MAC instructions, the DSP engine executes field-oriented control (FOC) and sensorless observers within 50-100 microsecond loop periods. The CTMU and high-speed ADC support back-EMF and shunt-based current sensing. Typical implementations run 16-20 kHz PWM from a 3.3V rail, driving gate-driver ICs such as the MCP14700 or IR2101 for the power stage.
Recommended
Digital Power Supplies
For digitally controlled AC-DC and DC-DC converters (PFC, LLC, buck, flyback), the DSPIC33FJ32MC102-E/SO provides deterministic high-frequency PWM control. The MCPWM generators offer phase-shifted and complementary operating modes with programmable dead time, enabling LLC half-bridge and phase-shifted full-bridge topologies. The 16-bit DSP core with single-cycle 16x16 MAC computes PID and compensator equations at loop rates exceeding 100 kHz, while the fast comparators implement cycle-by-cycle current limiting for fault protection. Operating from a 3.0V-3.6V rail with the extended -40C to +125C temperature grade, it survives power-supply enclosures. PPS allows the ADC trigger sources and PWM outputs to be remapped for optimal PCB layout around the magnetics.
Recommended
Uninterruptible Power Supplies (UPS)
Line-interactive and online UPS systems require synchronized inverter control, battery charging, and fast transfer logic - a workload matched to this DSC. The two independent MCPWM timebases can generate the inverter sine-PWM and the charger converter PWM simultaneously, while the DSP engine computes sine lookup, RMS calculations, and PI loops at 16 MIPS. Three analog comparators provide hardware overcurrent and DC-bus overvoltage protection with microsecond response. The RTCC maintains time-stamping of power events without external RTC ICs, and 32KB Flash holds the full control firmware plus communication stacks. The extended temperature rating suits UPS installations in non-conditioned environments up to 125C junction.
Recommended
Capacitive Touch Interfaces
The integrated Charge Time Measurement Unit (CTMU) makes the DSPIC33FJ32MC102-E/SO a capable host for capacitive touch buttons, sliders, and proximity sensing in appliance and industrial HMI panels. The CTMU measures charge time with sub-nanosecond resolution, detecting sub-picofarad capacitance changes on up to 8 channels mapped through the analog multiplexer (AN0-AN5 available on this 28-pin device). Microchip's mTouch sensing library runs alongside the main application in the 32KB Flash, and the RTCC supports wake-from-touch scheduling for battery-powered panels. Because the sensing engine is on-chip, no dedicated touch controller is needed, reducing BOM cost in single-chip control-plus-HMI designs.
Recommended
Industrial Automation and Sensors
In factory automation nodes - actuators, small conveyors, pumps, and fan controllers - the DSPIC33FJ32MC102-E/SO combines motor-control PWM with general-purpose connectivity. Peripheral Pin Select (PPS) remaps UART, SPI, and I2C onto any available RPx pins, simplifying routing in dense DIN-rail PCBs. The 16-bit core executes control and protocol tasks concurrently at 16 MIPS, the 2KB RAM buffers Modbus RTU frames, and the extended -40C to +125C grade tolerates panel-mounted enclosures. The CTMU can also serve as a complementary/uptime measurement unit for sensor signal conditioning. UART-based Modbus, CAN-adjacent simple protocols, or SPI links to gateway modules integrate the node into larger SCADA systems.
Recommended
Appliance Motor Control (Fans, Pumps, Compressors)
Household appliance drives - HVAC blowers, dishwasher circulation pumps, refrigerator compressors - use this DSC to replace discrete control ICs. Sensorless trapezoidal or FOC algorithms run comfortably in the 32KB Flash / 2KB RAM budget, with the MCPWM's independent timebases handling the power stage and the comparators protecting against locked-rotor overcurrent in hardware. PPS allows UART communication with the main appliance controller board, and the RTCC enables run-hour logging for service diagnostics. The low pin count 28-SOIC with extended temperature grade suits PCBs mounted near motor windings where ambient temperatures exceed standard industrial limits, at a consumer-electronics-compatible cost point.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32MC102-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32MC101-E/SO | DSPIC33FJ32MC102-I/SO | DSPIC33FJ32MC101T-I/SO | DSPIC33FJ16MC102-E/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 32 KB (11K x 24) | 16 KB | 32 KB (11K x 24) | 16 KB | 16 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Performance | 16 MIPS @ 32 MHz | 16 MIPS @ 32 MHz | 16 MIPS @ 32 MHz | 16 MIPS @ 32 MHz | 16 MIPS @ 32 MHz |
| Operating Temperature | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) |
| MCPWM / Comparators / CTMU | Yes / 3 / Yes | Yes / 3 / Yes | Yes / 3 / Yes | Yes / 3 / Yes | Yes / 3 / Yes |
| PPS and RTCC | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
Key Differentiators
- Double the Flash of the MC101 variant at the same footprint (vs DSPIC33FJ32MC101-E/SO)
- Extended -40C to +125C temperature grade (vs DSPIC33FJ32MC102-I/SO)
- Integrated MCPWM + 3 comparators + CTMU on-chip (vs DSPIC33FJ16MC102-E/SO)
- Trade-off: no cross-brand pin-compatible equivalent (vs Infineon XMC1300 / STM32F0 (comparison only))
Design Notes
The dsPIC33FJ core runs from an internal 2.5V regulator; connect a low-ESR 10uF ceramic capacitor (X5R/X7R, rated 6.3V or higher) directly from the VCAP/VDDCORE pin (pin 10) to VSS, plus a 0.1uF in parallel. Never drive VCAP externally or use it to power other circuitry. Decouple each VDD pin with 0.1uF close to the pin. Supply range is strictly 3.0V-3.6V - the family is not 5V tolerant on digital pins, so level-shift 5V signals from legacy peripherals.
Route MCPWM outputs with symmetrical traces to the three gate drivers to keep dead-time mismatch below a few nanoseconds; keep the FLTA/FLTB fault inputs (pins 27-28) short and shielded from PWM switching noise, and configure input hysteresis since comparators and fault pins can chatter near thresholds. Place the ICSP connector (MCLR, VDD, VSS, PGD pin 15, PGC pin 16) at the board edge with series 100R on PGD/PGC if those pins double as I/O driving capacitive loads.
Pins default to analog on reset - RB0-RB5 (AN0-AN5) read as 0 until you clear their ANSB bits, a classic bring-up bug. PPS assignments must be unlocked (written in sequence) and outputs unlocked/locked per write. Flash endurance and the self-programming charge pump require VDD in the 3.0V-3.6V range; page-erase before rewrite. Verify that the compiled FOC firmware with communication stacks fits 32KB with margin before selecting the 16KB MC101 drop-in alternative.
Estimated: at 3.3V, 32 MHz, and typical 10-20 mA operating current, power dissipation is roughly 33-66 mW, negligible for the 28-SOIC thermal resistance (on the order of 90-100 C/W per family datasheet), yielding under 7C junction rise. Extended-grade parts are specified to +125C ambient, but designs near that limit should account for switching-loss-driven ambient rise in enclosed drives rather than the DSC's own dissipation.
Compliance Information
RoHS compliance and lead-free status per Microchip product/distributor listings for the -E/SO suffix. REACH, halogen-free, and conflict-minerals status not stated in the provided data.
