DSPIC33FJ32MC102T-I/SO - 16-bit DSC, 32KB Flash, MCPWM | Microchip
MPN: DSPIC33FJ32MC102T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.26 | $5.26 |
| 10 | $4.75 | $47.50 |
| 100 | $4.18 | $418.00 |
| 500 | $3.72 | $1,860.00 |
| 1,000 | $3.3 | $3,300.00 |
DSPIC33FJ32MC102T-I/SO Overview
A digital signal controller combines the computational throughput of a DSP with the deterministic control peripherals and interrupt architecture of a microcontroller. Within the power-management hierarchy, the DSC sits above general-purpose MCUs and below standalone DSPs, making the dsPIC33FJ family a common choice for closed-loop digital control of motors and switched-mode power conversion.
Key features include a 16-bit dsPIC33F core executing up to 16 MIPS, motor control PWM (MCPWM) outputs suited to BLDC, PMSM, and ACIM drive topologies, three on-chip analog comparators for fast overcurrent and zero-crossing detection, and the Charge Time Measurement Unit (CTMU) for capacitive touch and precise time measurement. Peripherals also include a real-time clock and calendar (RTCC) and Peripheral Pin Select (PPS) for flexible digital I/O mapping. According to Microchip product documentation, I/O pins can sink or source 10 mA (6 mA) standard, up to 16 mA or 12 mA on non-standard VOH pins, with up to 20 selectable open-drain outputs and pull-ups, plus three external interrupts (two remappable).
The device operates at 3.3V over an industrial -40C to +85C temperature range (I suffix) and supports In-Circuit Serial Programming (ICSP) and debugging via standard Microchip tools (MPLAB X IDE, ICD 3, PICkit 3/4). The architecture provides DSP multiply-accumulate instructions and two 40-bit accumulators for filtering and control-loop math.
Typical applications include brushless DC and permanent-magnet motor drives, digital power supplies and PFC stages, electronic locking and sensing systems using the CTMU, and industrial automation nodes where low pin count and low cost matter.
Design consideration: reserve the dedicated MCPWM, comparator, and PPS pin roles early in layout, and decouple VDD/VSS pairs with 0.1uF ceramics placed within 5mm of the pins; PWM switching edges demand careful ground-return planning.
This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33FJ32MC102T-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 DSPIC33FJ32MC102T-I/SO (same form factor and footprint) — differing in Package, Core, External Interrupts, I/O Sink/Source Current, Motor Control PWM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32MC102-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32MC102T-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32MC101T-I/SO
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →DSPIC33FJ12MC202T-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GP102T-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32MC102T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F DSC |
| Maximum CPU Speed | 16 MIPS (16 MHz oscillator) |
| Program Memory (Flash) | 32 KB (11K x 24) |
| RAM | 2 KB |
| Supply Voltage | 3.3 V (2.97 V to 3.63 V) |
| Package | 28-SOIC (0.295 in / 7.50 mm width) |
| Pin Count | 28 |
| Motor Control PWM (MCPWM) | Yes |
| Analog Comparators | 3 |
| CTMU (Charge Time Measurement Unit) | Yes |
| RTCC (Real-Time Clock and Calendar) | Yes |
| Peripheral Pin Select (PPS) | Yes (remappable digital I/O) |
| External Interrupts | 3 (two remappable) |
| I/O Sink/Source Current | 10 mA / 6 mA standard; up to 16 mA / 12 mA non-standard VOH |
| Open-Drain Outputs / Pull-ups | Up to 20 selectable |
| Operating Temperature Range | -40C to +85C (I grade) |
| Mounting Type | Surface Mount |
| Series | dsPIC33FJ32MC102 (dsPIC 33F) |
| Packaging Suffix | T = Tape & Reel |
| RoHS Status | Compliant (lead-free SOIC per distributor listings) |
DSPIC33FJ32MC102T-I/SO 28-soic (0.295 in / 7.50 mm width) Pin Configuration Guide
Pin configuration for DSPIC33FJ32MC102T-I/SO (28-soic (0.295 in / 7.50 mm width) 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 DSPIC33FJ32MC102T-I/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ32MC102T-I/SO is suitable for 6 applications: BLDC Motor Drives, Digital Power Supplies and PFC, Capacitive Touch and Charge Measurement, Industrial Automation Nodes, Appliance Motor Control, Embedded Sensing and Data Loggers.
BLDC Motor Drives
The DSPIC33FJ32MC102T-I/SO is purpose-built for sensorless and sensored BLDC/PMSM control. The MCPWM peripheral generates complementary or independent PWM with programmable dead time, while the three onboard analog comparators provide cycle-by-cycle overcurrent shutdown and back-EMF zero-cross detection without external comparator ICs. The 16 MIPS DSP core with dual 40-bit accumulators executes PI current loops and field-oriented control math at the multi-kHz rates needed for smooth torque. In a typical trapezoidal drive, the comparator trip threshold is set via the CVR and PWM outputs are remapped through PPS to the gate-driver pins, minimizing external glue logic and board cost in compact 28-pin designs.
Recommended
Digital Power Supplies and PFC
For digitally controlled flybacks, LLC converters, and PFC stages, this DSC offers fast comparators for cycle-by-cycle current limiting plus a DSP core running voltage/current control loops at 16 MIPS. The MCPWM with dead-time insertion drives half-bridge gate configurations safely, and the ADC-triggered-by-PWM architecture (per the dsPIC33FJ family datasheet) samples inductor current at the optimal point in each switching cycle. The CTMU adds precise timing measurement for startup supervision. Because control parameters ship in firmware, a single PCB supports multiple output-voltage SKUs, and compensation can be field-updated - a key advantage over fixed analog control at comparable 28-pin cost.
Recommended
Capacitive Touch and Charge Measurement
The integrated Charge Time Measurement Unit (CTMU) turns this DSC into a low-cost capacitive-touch controller or precision time/charge measurement engine. By injecting a constant current and timing the charge ramp on an external electrode, the CTMU measures capacitance changes to sub-percent resolution - sufficient for appliance buttons, sliders, and proximity sensing through glass or plastic overlays. The 20 selectable pull-ups and open-drain outputs on the I/O banks (per datasheet 70000652f) simplify electrode drive, while the RTCC keeps time-stamped logs of touch events. Combined with the 3.3V rail and 28-SOIC footprint, it suits white-goods panels and industrial HMI keys where a dedicated touch IC would add BOM cost.
Recommended
Industrial Automation Nodes
In factory automation, this DSC serves as an intelligent actuator or sensor node: the UART and remappable SPI/I2C (via PPS) link to PLC networks or gateways, the RTCC supports scheduled maintenance logging, and three external interrupts capture encoder or limit-switch events with deterministic latency. The 16-bit core runs PID positioning loops for small servo axes at 16 MIPS, while 10-16 mA I/O drive directly drives optocouplers and indicator LEDs. The industrial -40C to +85C rating covers unconditioned cabinets. Peripherals Pin Select lets one PCB layout serve multiple product variants by remapping digital pins in firmware, reducing SKU proliferation in mid-volume industrial products.
Recommended
Appliance Motor Control
Fans, pumps, and compressors in appliances benefit from this controller's cost/performance balance. The MCPWM plus three comparators implement sensorless trapezoidal or FOC drive for single-shunt current sensing, and the 28-SOIC package fits single-sided, cost-optimized appliance PCBs. The RTCC enables timed operation profiles and tariff-aware scheduling, while the E-grade AEC-Q100 sibling (DSPIC33FJ32MC102T-E/SO) covers thermally harsh compressor compartments up to +125C. With 32KB Flash, the same chip stores multiple operating modes plus an OTA-style firmware updater via UART bootloader. Microchip's low-cost development ecosystem (MPLAB X, free compiler tiers) shortens appliance firmware cycles compared with proprietary DSP toolchains.
Recommended
Embedded Sensing and Data Loggers
The CTMU, RTCC, and remappable serial peripherals make this DSC a compact sensing and logging hub. Analog front ends can use the onboard comparators as window detectors for threshold alarms while the DSP core applies IIR filtering with multiply-accumulate instructions; 2KB RAM buffers sample batches before UART/SPI upload. The RTCC time-stamps records with calendar accuracy for compliance logging in HVAC, water metering, and cold-chain monitors. With 32KB Flash, the same part stores a calibrated lookup table plus a field-updatable application. The 3.3V rail and low pin count support battery-backed designs, and the industrial temperature grade suits outdoor and utility enclosures.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32MC102T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32MC102-I/SO | DSPIC33FJ32MC102T-E/SO | DSPIC33FJ32MC101T-I/SO | DSPIC33FJ12MC202T-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (7.50mm) | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 32 KB (11K x 24) | 32 KB | 32 KB | 16 KB | 12 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB |
| CPU Performance | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| Temperature Range | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E), AEC-Q100 | -40C to +85C (I) | -40C to +85C (I) |
| Motor Control Peripherals (MCPWM/Comparators) | MCPWM + 3 comparators + CTMU | MCPWM + 3 comparators + CTMU | MCPWM + 3 comparators + CTMU | MCPWM + 3 comparators | MCPWM + 2 comparators |
| Packaging Method | Tape & Reel (T) | Tube | Tape & Reel (T) | Tape & Reel (T) | Tape & Reel (T) |
Key Differentiators
- Double the program memory of the low-cost sibling (vs DSPIC33FJ32MC101T-I/SO)
- Industrial temperature grade with full peripheral set (vs DSPIC33FJ12MC202T-I/SO)
- Cost-optimized for standard industrial environments (vs DSPIC33FJ32MC102T-E/SO)
Design Notes
Place a 0.1uF ceramic capacitor at each VDD/VSS pair within 5mm of the pins, plus one 4.7uF-10uF bulk capacitor near the IC. Because this device merges analog comparators, CTMU, and fast digital PWM edges on one die, keep the gate-driver return currents off the analog ground segment: use a single solid ground plane with a deliberate partition under the comparator inputs. The exposed routing around the 28-SOIC (7.50mm width) leaves generous track pitch, so prioritize analog short returns over density. Per Microchip family datasheet 70000652f layout guidance.
This is a 3.3V-only device - applying 5V to VDD or to non-5V-tolerant pins damages the part; check the datasheet 5V-tolerant pin list before interfacing legacy 5V sensors. Peripheral Pin Select (PPS) must be explicitly unlocked (PPS-locked sequence) before remapping digital pins; forgetting this yields peripherals that appear dead in firmware. The MCPWM fault inputs and comparator outputs need correct polarity configuration before enabling PWM outputs, or gate drivers can see unintended active-high pulses at power-up.
PWM edges driving MOSFET gates can couple into the comparator inputs through shared ground impedance and cause false overcurrent trips. Route comparator inputs away from PWM traces, add a small RC (e.g., 100 ohm / 1 nF, estimated - verify in your design) at each comparator input, and use the digital filter options in the comparator module. For sensorless back-EMF sensing, sample synchronously via the ADC PWM trigger rather than free-running sampling to reject switching noise.
Compliance Information
RoHS/lead-free status per distributor listings (Hotenda, DigiKey). AEC-Q100 qualification applies to the DSPIC33FJ32MC102T-E/SO variant, not the standard I-grade. REACH/halogen status not stated in provided data.
