DSPIC33FJ32MC102-I/ML - 16-bit DSC, 32KB Flash | Microchip
MPN: DSPIC33FJ32MC102-I/ML ✓ 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 | $3.02 | $3,020.00 |
DSPIC33FJ32MC102-I/ML Overview
A digital signal controller combines the compute power of a DSP engine with the peripheral set and ease of use of a microcontroller. Within the power-management hierarchy, the DSC sits between a general-purpose MCU and a dedicated DSP: it executes deterministic control loops (PI, field-oriented control) while integrating motor-control peripherals such as MCPWM, comparators and ADCs on the same die, eliminating external controller chips in compact embedded systems.
Key features include the Motor Control PWM (MCPWM) module with complementary outputs and dead-time insertion, a Charge Time Measurement Unit (CTMU) for capacitive touch and time measurement, Peripheral Pin Select (PPS) for flexible pin remapping, three analog comparators, and a Real-Time Clock and Calendar (RTCC). The modified Harvard 16-bit core with DSP instruction support (multiply-accumulate, modulo addressing) executes digital filters efficiently at 16 MIPS.
Technically, the dsPIC33FJ architecture couples an enhanced instruction set with a high-speed ADC (up to 500 ksps) and 5V-tolerant I/O pins with up to 16 mA sink/source capability, enabling direct drive of LEDs and optocouplers. The core runs from an internal PLL-boosted clock derived from an external crystal or internal FRC oscillator, simplifying clock design.
Typical applications include brushless DC and PMSM motor control, digital power supplies (switch-mode converters with feedback loops), power inverters, and sensor signal conditioning with capacitive touch interfaces via the CTMU. The small 6x6 mm QFN suits space-constrained consumer and industrial boards.
Design consideration: budget Flash carefully - 32KB is ample for single-loop FOC, but dual-motor or complex field-weakening algorithms may require the larger family members; also account for the 2KB RAM when sizing control-loop buffers and stacks.
This page synthesizes distributor pricing, drop-in family alternatives, FAQ-driven selection guidance, and practical design notes not consolidated in the manufacturer datasheet, as of 2026-09-27.
Drop-in alternatives for DSPIC33FJ32MC102-I/ML — 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-I/ML (same form factor and footprint) — differing in Operating Temperature, Package, RAM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32MC102-E/ML
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →DSPIC33FJ16MC102-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32MC101-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ16MC101-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GP102-I/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.48 / Unit
View Datasheet →DSPIC33FJ32MC102-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit modified Harvard, DSP-enhanced |
| Maximum CPU Speed | 16 MIPS |
| Program Memory (Flash) | 32 KB |
| RAM | 2 KB |
| Package | 28-pin QFN (6x6 mm), ML |
| Operating Temperature | -40C to +85C (I grade) |
| Operating Voltage Range | 3.0 V to 3.6 V |
| PWM Module | MCPWM, motor-control with dead-time |
| Analog Comparators | 3 |
| CTMU | Yes (Charge Time Measurement Unit) |
| Peripheral Pin Select (PPS) | Yes |
| RTCC | Yes (Real-Time Clock and Calendar) |
| I/O Sink/Source Current | 10 mA or 6 mA standard, up to 16 mA or 12 mA non-standard |
| 5V Tolerant I/O | Yes |
| External Interrupts | 3 (two remappable) |
| Mounting Type | Surface Mount |
DSPIC33FJ32MC102-I/ML Pin Configuration
| Pin 1 | MCLR — Master clear reset input, active low |
| 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/CTCMP/SS1/CN4/RB2 — Analog input 2 / CTMU comparator / SPI1 slave select / CN / port B bit 2 |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / QEA index input / CN / port B bit 3 |
| Pin 6 | VSS — Ground reference |
| Pin 7 | VDD — Positive supply, 3.0V to 3.6V |
| Pin 8 | AN4/T2CK/CN6/RB4? / OSC1 — Multiplexed analog/oscillator/IO function - verify against datasheet 70000652f pin tables |
| Pin 9 | OSC1/CLKI/RA2 — Crystal oscillator input / external clock input / port A bit 2 |
| Pin 10 | OSC2/CLKO/RC15 — Crystal oscillator output / clock output / port C bit 15 |
| Pin 11 | PGD/EMUD/AN8?/RP-remappable — In-circuit programming data / emulator data / remappable digital IO - verify per datasheet |
| Pin 12 | PGC/EMUC — In-circuit programming clock / emulator clock / remappable digital IO |
| Pin 13 | RPn (remappable IO) — Peripheral Pin Select remappable digital IO |
| Pin 14 | RPn (remappable IO) — Peripheral Pin Select remappable digital IO |
| Pin 15 | RPn (remappable IO) — Peripheral Pin Select remappable digital IO |
| Pin 16 | RPn/AN (multiplexed) — Remappable IO / analog input multiplexed function |
| Pin 17 | RPn/AN (multiplexed) — Remappable IO / analog input multiplexed function |
| Pin 18 | RPn/PWM (multiplexed) — Remappable IO / MCPWM output multiplexed function |
| Pin 19 | RPn/PWM (multiplexed) — Remappable IO / MCPWM output multiplexed function |
| Pin 20 | RPn (remappable IO) — Peripheral Pin Select remappable digital IO |
| Pin 21 | VSS — Ground reference (QFN center pad bond) |
| Pin 22 | RPn (remappable IO) — Peripheral Pin Select remappable digital IO |
| Pin 23 | RPn/AN (multiplexed) — Remappable IO / analog input multiplexed function |
| Pin 24 | RPn/AN (multiplexed) — Remappable IO / analog input multiplexed function |
| Pin 25 | RPn (remappable IO) — Peripheral Pin Select remappable digital IO |
| Pin 26 | RPn (remappable IO) — Peripheral Pin Select remappable digital IO |
| Pin 27 | RPn (remappable IO) — Peripheral Pin Select remappable digital IO |
| Pin 28 | VDD/AVDD — Analog/digital supply pin - verify split per datasheet 70000652f |
Typical Applications
DSPIC33FJ32MC102-I/ML is suitable for 6 applications: Brushless DC Motor Control, Digital Power Supplies, Capacitive Touch Interfaces, Power Inverters and Solar Converters, Industrial Sensor and Actuator Nodes, Consumer Appliances and HMI.
Brushless DC Motor Control
The DSPIC33FJ32MC102-I/ML fits BLDC and PMSM drives because its MCPWM module generates complementary PWM pairs with programmable dead-time insertion, eliminating external gate-timing logic. The three on-chip analog comparators provide cycle-by-cycle overcurrent protection and support sensorless back-EMF zero-crossing detection, while the 16-bit DSP core at 16 MIPS executes trapezoidal or field-oriented control loops in the 2KB RAM with room to spare. Firmware remaps commutation inputs via Peripheral Pin Select, so one 6x6 mm QFN layout serves multiple motor power ratings. Place the ADC sampling synchronized to the PWM center to minimize ripple-induced measurement noise; unlike general-purpose MCUs, the synchronized sampling and dedicated dead-time hardware reduce software latency in the current loop, improving torque ripple performance at high electrical speeds.
Recommended
Digital Power Supplies
In switch-mode power supplies (buck, boost, PFC stages), the DSPIC33FJ32MC102-I/ML closes voltage and current loops digitally. The MCPWM module's complementary outputs with dead-time control drive half-bridge gates directly, and the high-speed ADC samples the output voltage synchronized to PWM edges to avoid switching-noise contamination - critical because asynchronous sampling can alias ripple into the control loop. The 16 MIPS DSP core implements 3P3Z or PI compensators with multiply-accumulate instructions, achieving loop bandwidths practical for telecom and adapter converters. The three comparators offer hardware fast-trip overcurrent protection that operates without CPU intervention, meeting safety requirements in millisecond-critical fault scenarios. Its 3.0V to 3.6V supply and 5V-tolerant I/O simplify interfacing with gate-driver ICs and feedback dividers on mixed-voltage boards.
Recommended
Capacitive Touch Interfaces
The integrated CTMU (Charge Time Measurement Unit) makes the DSPIC33FJ32MC102-I/ML a single-chip solution for capacitive touch buttons, sliders and liquid-level sensing. The CTMU measures charge time on electrode capacitance with sub-nanosecond resolution, and firmware applies scanning and debounce algorithms on the 16-bit core, so no external touch controller is required - a meaningful BOM saving in appliance and consumer designs. Combined with the RTCC, a washing-machine or cooktop HMI can run touch scanning, real-time clock keeping, and actuator control on one 6x6 mm QFN. For best noise immunity in motor-coupled environments, ground-shield electrodes and synchronize CTMU scans to idle PWM periods; the device's Peripheral Pin Select lets designers choose electrodes on any remappable pin after PCB routing is finalized.
Recommended
Power Inverters and Solar Converters
Single-phase inverters, micro-inverters and solar charge controllers benefit from the DSPIC33FJ32MC102-I/ML's combination of DSP math throughput and motor-control peripherals. The MCPWM generates high-frequency PWM for the DC-DC stage while remapped output-compare channels handle line-frequency unfolding, and the 16 MIPS core with DSP multiply-accumulate executes MPPT algorithms and grid-synchronization (PLL) code concurrently in the 2KB RAM. Hardware comparators implement DC-bus overvoltage and ground-fault fast protection independent of firmware, an important safety layer when firmware hangs. The RTCC supports time-of-use energy logging without an external RTC chip. Designers should budget the 32KB Flash carefully: a full MPPT plus grid-tie stack fits, but adding proprietary logging may require the 64KB family members on the same dsPIC33F core for easy migration.
Recommended
Industrial Sensor and Actuator Nodes
Factory automation nodes use the DSPIC33FJ32MC102-I/ML to bridge sensors to actuators in a single low-cost controller. Peripheral Pin Select remaps UART, SPI and external interrupts to optimal QFN pins, so one PCB supports RS-485, encoder-input and stepper-drive variants. The industrial -40C to +85C rating suits unconditioned cabinets, and 5V-tolerant I/O interfaces directly with legacy 24V-logic-shifted signals through simple dividers. The CTMU adds low-cost linearization of resistive sensors (NTC, strain gauge excitation) without an external ADC front end, while the 16-bit core runs filtering and PID positioning loops deterministically at 16 MIPS. The RTCC timestamps events for maintenance logging. Because the dsPIC33F core is shared across the family, field-upgrade paths to larger Flash parts require no board respin when the same ML package is retained.
Recommended
Consumer Appliances and HMI
Appliance control boards (fans, pumps, blenders, HVAC blowers) converge on the DSPIC33FJ32MC102-I/ML because it merges motor drive, capacitive touch and real-time clock in one 28-pin QFN, shrinking PCB area in cost-driven products. The MCPWM drives single-phase and BLDC fan/pump motors with hardware dead-time, the CTMU handles touch buttons and rotary sliders through the plastic fascia, and the RTCC maintains clock display in HVAC panels without extra ICs. At 16 MIPS the core sequences user-interface state machines and motor commutation simultaneously. The ultra-low-cost positioning of the MC102 family - Microchip describes it as an ultra-low-cost, high-performance motor-control family - targets exactly this segment. Designers should verify EMI compliance early, since the 6x6 mm QFN concentrates switching currents in a small loop area.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32MC102-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32MC102-E/ML | DSPIC33FJ16MC102-I/ML | DSPIC33FJ32MC101-I/ML | DSPIC33FJ16MC101-I/ML | DSPIC33FJ32GP102-I/ML |
|---|---|---|---|---|---|---|
| Package | 28-QFN (6x6 mm) ML | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 16 KB | 32 KB | 16 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| CPU Speed | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| Temperature Range | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| RTCC | Yes | Yes | Yes | No | No | Yes |
| Motor Control PWM (MCPWM) | Yes | Yes | Yes | Yes | Yes | No (standard PWM, no dead-time MCPWM) |
| Relative Cost | Baseline | Higher (extended temp) | Lower (half Flash) | Lower (no RTCC) | Lowest in family | Similar (GP family) |
Key Differentiators
- Extended temperature headroom available in same footprint (vs DSPIC33FJ32MC102-E/ML)
- RTCC integrated at no board cost (vs DSPIC33FJ32MC101-I/ML)
- Dedicated motor-control PWM with hardware dead-time (vs DSPIC33FJ32GP102-I/ML)
Design Notes
Decouple VDD and AVDD with 0.1uF ceramic capacitors placed within 2 mm of each supply pin, plus a 4.7uF to 10uF bulk capacitor per supply rail. The dsPIC33F core draws transient current spikes at 16 MIPS; undersized decoupling causes brown-out resets during PWM bursts. If using the internal LDO/PLL configuration, follow the Microchip Family Reference Manual power-supply section exactly - the PLL is sensitive to supply ripple, and jitter on the clock degrades ADC accuracy and PWM symmetry.
Keep the MCPWM output loop to the gate drivers short and route each PWM pair as a tightly coupled pair over a solid ground plane. The 6x6 mm QFN concentrates fast edge currents in a small footprint, so EMI performance depends heavily on a low-inductance ground return. Use the QFN exposed center pad as a grounded thermal/electrical pad - connect it to the ground plane with a 4x4 via matrix. Analog traces (comparator inputs, CTMU electrodes) should be guarded by ground and kept away from PWM traces.
Three frequent mistakes with this part: (1) forgetting that 2KB RAM is shared between stacks, DMA buffers and control-loop state - overflow causes silent corruption; reserve at least 25% headroom. (2) Programming code into a 16KB variant (MC101/MC16 family) that exceeds Flash - link-map before committing to a footprint-compatible down-spec swap. (3) MCLR must not be left floating; use a 10k pull-up with a 0.1uF cap for reliable in-circuit serial programming (ICSP) via PGD/PGC pins.
Estimated: at 16 MIPS with all PWM outputs active and 3.3V supply, typical device current is roughly 30-50 mA (verify per datasheet 70000652f electrical characteristics), giving about 0.10-0.17 W dissipation. With QFN-28 theta_JA typically around 40-50 C/W on a standard 4-layer board, junction rise is only 5-8 C above ambient - no heatsinking is needed. The concern is ambient, not self-heating: in sealed appliance enclosures approaching +85C, prefer the -E/ML grade for margin.
Compliance Information
Compliance status not stated in provided web data; verify on Microchip product page or distributor environmental data sheets.
