DSPIC33FJ32MC104-I/ML - 16-bit DSC, 16 MIPS, 32KB Flash | Microchip
MPN: DSPIC33FJ32MC104-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.9 | $39.00 |
| 100 | $3.45 | $345.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.85 | $2,850.00 |
DSPIC33FJ32MC104-I/ML Overview
A digital signal controller is a hybrid device that combines the compute throughput of a digital signal processor (DSP) with the peripheral integration and ease of use of a microcontroller (MCU). Within the power-management hierarchy, DSCs sit above basic MCUs for embedded control tasks such as field-oriented motor control, digital power conversion, and sensor conditioning, where single-cycle MAC (multiply-accumulate) DSP instructions and fast interrupt response are required.
Key features include the 16-bit modified Harvard architecture with DSP engine, the CTMU for capacitive touch and precise time measurement, up to three MCPWM generators with complementary outputs and dead-time control, and PPS that lets developers remap digital peripherals onto selectable pins. The 44-QFN (8x8) footprint keeps board area small while exposing sufficient PWM and analog channels.
Architecturally, the dsPIC33FJ core executes two-operand MAC instructions that fetch two data operands from memory in the same cycle while multiplying two W registers and accumulating the result, with optional saturation, as described in the Microchip family datasheet. This makes closed-loop current control loops, Clarke/Park transforms, and PI regulators practical at modest clock rates, reducing system cost compared with higher-end DSPs.
Typical applications include brushless DC (BLDC) and permanent-magnet synchronous motor (PMSM) drives, switched-mode power supplies and digital power supplies, capacitive-touch user interfaces via CTMU, and industrial sensors and actuators. The motor-control peripheral set and PPS make it especially effective in low-pin-count motion products such as fans, pumps, power tools, and small robotics.
Design consideration: use the PGEC3/PGED3 pin pair for in-circuit programming and debugging, as documented in Microchip's Motor Control Plug-in Module information sheet, and reserve these pins on the PCB for easy field updates.
This page adds value beyond the datasheet by synthesizing distributor availability data, drop-in same-family alternatives, comparison tables, and practical design notes for procurement and engineering teams.
Drop-in alternatives for DSPIC33FJ32MC104-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 DSPIC33FJ32MC104-I/ML (same form factor and footprint) — differing in Package, Max CPU Speed, Operating Temperature, Charge Time Measurement Unit, Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32MC104-H/ML
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32MC104-E/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.72 / Unit
View Datasheet →DSPIC33FJ32GP104-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32GP304-I/ML
✅ Drop-In✓ In Stock
$3.49 / Unit
View Datasheet →DSPIC33FJ32MC104-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F modified Harvard with DSP engine |
| Max CPU Speed | 16 MIPS |
| Program Memory (Flash) | 32KB (11K x 24) |
| SRAM | 2KB |
| Package | 44-QFN (8x8 mm) |
| Operating Temperature | -40C to +85C (I grade) |
| Motor Control PWM | MCPWM with complementary outputs and dead-time control |
| Comparators | 3 comparators |
| Charge Time Measurement Unit | CTMU (capacitive touch / time measurement) |
| Real-Time Clock | RTCC (real-time clock and calendar) |
| Peripheral Pin Select | PPS (remappable digital I/O) |
| External Interrupts | 3 (two remappable) |
| I/O Sink/Source Current | 10 mA or 6 mA pin-specific standard; up to 16 mA or 12 mA non-standard |
| Pull-ups / Open-Drain | Up to 20 selectable open-drain and pull-ups |
| Programming/Debug | In-circuit serial programming via PGEC3/PGED3 pair |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
DSPIC33FJ32MC104-I/ML 44-qfn (8x8 mm) Pin Configuration Guide
Pin configuration for DSPIC33FJ32MC104-I/ML (44-qfn (8x8 mm) 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 DSPIC33FJ32MC104-I/ML.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ32MC104-I/ML is suitable for 6 applications: BLDC / PMSM Motor Drives, Digital Power Supplies (SMPS), Capacitive Touch Interfaces, Industrial Sensors and Actuators, Power Tools and Small Appliances, Fans, Pumps and HVAC Blowers.
BLDC / PMSM Motor Drives
The DSPIC33FJ32MC104-I/ML fits brushless DC and permanent-magnet synchronous motor drives because its MCPWM module provides complementary PWM outputs with programmable dead-time, exactly what three-phase half-bridge inverters require. The 16 MIPS 16-bit DSP core with single-cycle MAC instructions executes Clarke/Park transforms and current-loop PI regulators comfortably at typical 10-20 kHz switching frequencies. Three on-chip comparators provide cycle-by-cycle over-current protection without external comparators. Firmware can implement sensorless back-EMF commutation or hall/encoder feedback using remappable I/O via Peripheral Pin Select. Placed as the sole controller between current-sense shunts and gate drivers, it reduces BOM cost versus separate MCU-plus-logic solutions while keeping the 44-QFN (8x8 mm) footprint small enough for integrated motor electronics.
Recommended
Digital Power Supplies (SMPS)
For digitally controlled switched-mode power supplies, the DSPIC33FJ32MC104-I/ML provides fast PWM with high resolution, an ADC for output voltage and current feedback, and DSP throughput for compensation loops running at 16 MIPS. The motor control PWM module's independent timebases and dead-time control suit half-bridge and full-bridge topologies, while three on-chip comparators implement fast over-current trip without waiting on software latency. Single-cycle MAC instructions accelerate digital PID compensators and feed-forward calculations. Peripheral Pin Select allows the designer to place PWM and feedback pins optimally for gate-driver and shunt routing on the PCB. Compared with analog control, firmware-based control enables soft-start sequencing, adaptive dead-time, and field-upgradable control laws in the 32KB Flash without redesigning compensation networks.
Recommended
Capacitive Touch Interfaces
The integrated Charge Time Measurement Unit (CTMU) makes the DSPIC33FJ32MC104-I/ML a strong fit for capacitive touch buttons, sliders, and proximity sensing embedded in motor-driven products such as power tools, pumps, and appliances. The CTMU measures precise charge times on pad capacitance, and firmware filters changes to distinguish finger touches from noise. Because the touch controller is on the same die as the motor control PWM, a single 44-QFN (8x8 mm) device can replace an MCU-plus-touch-IC two-chip solution, cutting BOM cost and board area. Remappable I/O via PPS lets touch channels and PWM outputs coexist without pin conflicts. Layout should keep touch pads away from the high-dv/dt inverter traces, and the industrial -40C to +85C grade supports appliance environments.
Recommended
Industrial Sensors and Actuators
In industrial sensing nodes and actuator controllers, the DSPIC33FJ32MC104-I/ML combines a 16-bit DSP core, RTCC for timestamping, and remappable digital peripherals, all in a compact 44-QFN (8x8 mm) package rated -40C to +85C. The 32KB Flash stores sensor calibration tables and communication stacks, while 2KB SRAM buffers sample streams. DSP MAC instructions implement digital filtering (IIR/FIR) on noisy analog inputs efficiently. PWM outputs drive proportional valves, small actuators, and heater elements, and three external interrupts (two remappable) capture encoder or flow-pulse inputs. The RTCC supports scheduled sampling and event logging for maintenance analytics. Standard 10 mA I/O drive and up to 20 selectable open-drain/pull-up pins simplify direct interfacing with optocouplers and industrial digital inputs.
Recommended
Power Tools and Small Appliances
Cordless power tools and small appliances need motor control, user interface, and protection logic in minimal board space and cost. The DSPIC33FJ32MC104-I/ML addresses all three: MCPWM drives the brushless or brushed motor with dead-time-protected complementary outputs, the CTMU handles capacitive touch triggers and speed dials, and on-chip comparators provide over-current and stall protection. At 16 MIPS, firmware runs field-weakening and current limiting in real time. The 44-QFN (8x8 mm) package fits trigger assemblies and compact control boards, and the industrial temperature grade survives enclosed hot environments. In-circuit programming via PGEC3/PGED3 allows production firmware updates and feature personalization (torque profiles, LED indication) without changing hardware across product variants.
Recommended
Fans, Pumps and HVAC Blowers
Variable-speed fan, pump, and blower applications benefit from the DSPIC33FJ32MC104-I/ML's combination of sensorless motor control capability and system peripherals. The MCPWM module with complementary outputs and dead-time drives three-phase inverters for BLDC blowers, while back-EMF sensing through the ADC and comparators enables sensorless commutation without hall sensors, reducing cost and wiring. The RTCC supports duty scheduling in HVAC products, and the CTMU can add touch controls for speed selection. At 16 MIPS, firmware executes speed-ramp, current-limit, and efficiency-optimization algorithms concurrently with commutation. The 44-QFN (8x8 mm) industrial-grade package tolerates the -40C to +85C ambient range typical of outdoor and appliance-mounted fan electronics, and PPS simplifies routing on dense two-layer boards.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32MC104-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32MC104-H/ML | DSPIC33FJ32MC104-E/ML | DSPIC33FJ32GP104-I/ML | DSPIC33FJ32GP304-I/ML |
|---|---|---|---|---|---|
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Performance | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| Flash / SRAM | 32KB / 2KB | 32KB / 2KB | 32KB / 2KB | 32KB / 2KB | 32KB / 2KB |
| Temperature Grade | -40C to +85C (I) | Higher H grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) |
| Peripheral Focus | Motor Control (MCPWM, 3 comparators, CTMU, RTCC) | Motor Control - same | Motor Control - same | General Purpose | General Purpose |
Key Differentiators
- Dedicated motor control peripheral set (vs DSPIC33FJ32GP304-I/ML)
- Integrated CTMU capacitive touch (vs DSPIC33FJ32MC102 (28-pin family member))
- Temperature grade upgrade path (vs DSPIC33FJ32MC104-E/ML)
Design Notes
Reserve the PGEC3/PGED3 pin pair exclusively for in-circuit programming and debugging, as used on Microchip's dsPIC33FJ32MC104 Motor Control Plug-in Module (DS-52096a). Place a standard 5-pin (or 6-pin with MCLR) ICSP header on the PCB, keep series resistors (about 100 ohm) on PGD/PGC, and avoid loading these pins with LEDs or pull-ups that interfere with programming voltage levels. This enables field firmware updates on the 44-QFN without desoldering, which is essential given the QFN package is not hand-reworkable.
Decouple the VDD pins with 0.1 uF ceramic capacitors placed within 2 mm of each supply pin, plus one bulk 4.7-10 uF capacitor. In motor drive applications, keep the controller's analog ground star-connected to the power ground at a single point near the current-sense shunt to prevent PWM switching currents from corrupting ADC readings and comparator trip thresholds. Estimated: with 3.3 V typical digital supply logic, keep VDD ripple below 50 mV for stable ADC conversions.
Verify the temperature suffix when substituting: the -I grade is rated -40C to +85C, while the -H and -E variants extend higher. Do not assume Peripheral Pin Select makes all pins interchangeable - analog-only pins (ANx, comparators) are not remappable, so fix ADC and comparator pin assignments in hardware before routing PWM via PPS. Also confirm the specific MCPWM channel count against the 44-pin pinout in the Microchip family datasheet before committing a three-phase inverter design.
Compliance Information
RoHS/lead-free status per Microchip standard product data; verify REACH and conflict minerals declarations on the Microchip product page.