PIC24FJ32MC104-I/PT - 16-bit Motor Control MCU, 32KB Flash | Microchip
MPN: PIC24FJ32MC104-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.93 | $2.93 |
| 10 | $2.69 | $26.90 |
| 100 | $2.34 | $234.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.86 | $1,860.00 |
PIC24FJ32MC104-I/PT Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data memory, and programmable peripherals. The PIC24F family uses a 16-bit modified Harvard architecture with 16-bit instructions and 24-bit-wide Flash, delivering significantly higher code density and arithmetic throughput than 8-bit MCUs while remaining far simpler than 32-bit Cortex-M parts. The motor-control optimized "MC" variant adds hardware features that offload PWM generation, current sampling, and protection logic from the CPU, enabling tighter control loops in BLDC, PMSM, and stepper designs.
Key features include 16 MIPS performance, 32 KB self-programmable Flash with ECC, 2 KB SRAM, configurable peripheral pin select (PPS) for flexible I/O mapping, dual 3.3V/5V operating voltage, and 16 analog channels of 10-bit ADC with 500 ksps throughput. The CTMU enables capacitive touch buttons, humidity sensing, and time-of-flight measurement without external components, while the RTCC maintains timekeeping down to 1.8V VBAT operation.
The PIC24FJ32MC104-I/PT is widely deployed in cost-sensitive sensorless BLDC fan pumps, low-voltage 24V stepper drives, and household appliance motor controllers where 32 KB Flash is sufficient for sensorless FOC firmware. Its 44-pin TQFP footprint and PPS routing make it ideal for compact boards where PCB layout reuse across product variants matters.
When designing with this part, ensure that the input voltage to VDD is decoupled locally with 1uF and 0.1uF ceramic capacitors within 5 mm of the pins. For sensorless BLDC applications, leverage the integrated 10-bit reference DAC and analog comparators to implement zero-cross detection directly, eliminating external op-amp circuitry.
Drop-in alternatives for PIC24FJ32MC104-I/PT — 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 PIC24FJ32MC104-I/PT (same form factor and footprint) — differing in Package, ADC, Analog Comparators, Operating Temperature, CTMU.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ32MC104T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32MC104-E/PT
✅ Drop-In✓ In Stock
$1.86 / Unit
View Datasheet →PIC24FJ32MC104-I/ML
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →PIC24FJ32MC101-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32MC102-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32MC104-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC24F 16-bit modified Harvard |
| CPU Speed (Max) | 16 MIPS at 32 MHz |
| Program Memory (Flash) | 32 KB (11K x 24) |
| Data RAM | 2 KB |
| Operating Voltage | 3.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 44-pin TQFP (PT) 10x10 mm |
| PWM Channels (MCPWM) | 6 (3 complementary pairs) |
| Analog Comparators | 3 with 10-bit reference DAC |
| ADC | 10-bit, 16 channels, 500 ksps |
| Communication Interfaces | I2C, SPI, UART |
| CTMU (Charge Time Measurement) | Yes |
| RTCC | Yes (with VBAT support) |
| Peripheral Pin Select (PPS) | Yes |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC24FJ32MC104-I/PT Pin Configuration
| Pin 1 | RP15/RB15 — Remappable I/O / Port B |
| Pin 2 | RP14/RB14 — Remappable I/O / Port B |
| Pin 3 | RP13/RB13 — Remappable I/O / Port B |
| Pin 4 | RP12/RB12 — Remappable I/O / Port B |
| Pin 5 | RP11/RB11 — Remappable I/O / Port B |
| Pin 6 | VSS — Ground reference |
| Pin 7 | VDD — Positive supply (3.0-3.6V) |
| Pin 8 | PWM1H/L — PWM output pair 1 |
| Pin 9 | PWM2H/L — PWM output pair 2 |
| Pin 10 | PWM3H/L — PWM output pair 3 |
| Pin 11 | RP0/RA0 — Remappable I/O / Port A |
| Pin 12 | RP1/RA1 — Remappable I/O / Port A |
| Pin 13 | RP2/RA2 — Remappable I/O / Port A |
| Pin 14 | RP3/RA3 — Remappable I/O / Port A |
| Pin 15 | RP4/RA4 — Remappable I/O / Port A |
| Pin 16 | RP5/RA5 — Remappable I/O / Port A |
| Pin 17 | AVSS — Analog ground |
| Pin 18 | AVDD — Analog supply (3.0-3.6V) |
| Pin 19 | AN0/CMP1+ — Analog input / Comparator 1+ |
| Pin 20 | AN1/CMP1- — Analog input / Comparator 1- |
| Pin 21 | AN2/CMP2+ — Analog input / Comparator 2+ |
| Pin 22 | AN3/CMP2- — Analog input / Comparator 2- |
| Pin 23 | AN4/CMP3+ — Analog input / Comparator 3+ |
| Pin 24 | AN5/CMP3- — Analog input / Comparator 3- |
| Pin 25 | AN6 — Analog input |
| Pin 26 | AN7 — Analog input |
| Pin 27 | AN8 — Analog input |
| Pin 28 | AN9 — Analog input |
| Pin 29 | AN10 — Analog input |
| Pin 30 | AN11 — Analog input |
| Pin 31 | AN12 — Analog input |
| Pin 32 | AN13 — Analog input |
| Pin 33 | AN14 — Analog input |
| Pin 34 | AN15 — Analog input |
| Pin 35 | OSCI/RC12 — Oscillator input |
| Pin 36 | OSCO/RC15 — Oscillator output |
| Pin 37 | MCLR — Master clear reset (active-low) |
| Pin 38 | PGED2/RA8 — Programming data / Port A |
| Pin 39 | PGEC2/RA9 — Programming clock / Port A |
| Pin 40 | RTCC/RA10 — RTCC output / Port A |
| Pin 41 | SDA1/RG3 — I2C data / Port G |
| Pin 42 | SCL1/RG2 — I2C clock / Port G |
| Pin 43 | RP6/RC6 — Remappable I/O / Port C |
| Pin 44 | RP7/RC7 — Remappable I/O / Port C |
Typical Applications
PIC24FJ32MC104-I/PT is suitable for 6 applications: Sensorless BLDC Fan and Pump Control, Low-Voltage Stepper Motor Drive, Capacitive Touch User Interface, Battery-Powered Home Appliance Control, Industrial Sensor Hub with Motor Control, IoT Smart Home Actuator Nodes.
Sensorless BLDC Fan and Pump Control
The PIC24FJ32MC104-I/PT's integrated MCPWM with 3 complementary pairs and dead-time insertion drives 3-phase bridges directly for sensorless BLDC fan and pump applications. The 3 onboard analog comparators with 10-bit reference DAC detect BEMF zero-cross events without external op-amps, while 16 KB to 32 KB Flash holds sensorless trapezoidal or entry-level FOC firmware. Estimated sensorless startup with 16 MIPS CPU and 32 KB Flash fits compact 24V 1-2A pump motors in HVAC and appliance markets.
Recommended
Low-Voltage Stepper Motor Drive
The PIC24FJ32MC104-I/PT supports 4-wire bipolar stepper control using its 6 PWM channels for dual H-bridge current chopping. At 16 MIPS the CPU easily handles microstepping tables and current regulation loops at typical 20-50 kHz chopping frequencies. Industrial -40C to +85C temperature range supports factory automation and 3D-printer stepper drivers where TQFP-44 with PPS allows flexible PCB routing around power stages.
Recommended
Capacitive Touch User Interface
The PIC24FJ32MC104-I/PT's integrated CTMU (Charge Time Measurement Unit) enables robust capacitive touch buttons, sliders, and proximity sensors without dedicated touch ICs. The 10-bit ADC with 16 channels measures multiple touch electrodes sequentially, while 32 KB Flash holds scanning and gesture recognition firmware. Designers save BOM cost versus discrete touch controllers in appliance front panels, lighting controls, and IoT sensor nodes.
Recommended
Battery-Powered Home Appliance Control
Battery and energy-harvesting appliance controllers benefit from the PIC24FJ32MC104-I/PT's RTCC with VBAT operation down to 1.8V for timekeeping while main VDD is off. The 3.3V core with 5V-tolerant I/O interfaces directly with 5V sensor networks in legacy appliances. PPS allows mapping UART, I2C, and SPI peripherals to almost any I/O pin, simplifying PCB layout under mechanical constraints in white goods.
Recommended
Industrial Sensor Hub with Motor Control
Industrial sensor hubs combining vibration or temperature monitoring with onboard motor control use the PIC24FJ32MC104-I/PT's 16-channel 10-bit ADC at 500 ksps to sample multiple sensors while the MCPWM drives the actuator. The -40C to +85C industrial temperature range and PPS flexibility suit sealed factory enclosures. UART and I2C connect to host PLCs or HMIs while the 32 KB Flash holds Modbus or CANOpen application stacks.
Recommended
IoT Smart Home Actuator Nodes
Smart home actuator nodes use the PIC24FJ32MC104-I/PT to combine motor or valve control with low-power wireless connectivity. The CTMU handles capacitive user input, the RTCC manages scheduled events, and UART/SPI connect to ESP32 or similar wireless modules. PPS flexibility and compact 44-TQFP 10x10 mm package help fit the entire node into wall-switch or smart-valve form factors where TQFP with hand-solderable leads aids prototyping.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ32MC104-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ32MC104T-I/PT | PIC24FJ32MC104-E/PT | PIC24FJ32MC104-I/ML | PIC24FJ32MC101-I/PT | PIC24FJ32MC102-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-QFN (ML) - same pinout, smaller footprint | 44-TQFP (PT) - same | 44-TQFP (PT) - same |
| CPU Speed (MIPS) | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| PWM Channels | 6 (3 complementary pairs) | 6 (3 pairs) | 6 (3 pairs) | 6 (3 pairs) | 6 (3 pairs) | 6 (3 pairs) - reduced I/O count |
| Analog Comparators | 3 with 10-bit reference DAC | 3 with 10-bit ref DAC | 3 with 10-bit ref DAC | 3 with 10-bit ref DAC | 3 with 10-bit ref DAC | fewer comparators than -104 |
| ADC | 10-bit, 16 ch, 500 ksps | 10-bit, 16 ch, 500 ksps | 10-bit, 16 ch, 500 ksps | 10-bit, 16 ch, 500 ksps | 10-bit, fewer channels | 10-bit, fewer channels |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Integrated MCPWM with 3 complementary pairs and dead-time insertion (vs PIC24FJ32GA104-I/ML)
- Built-in 10-bit reference DAC for BEMF zero-cross detection (vs PIC24HJ32GP304-I/PT)
- CTMU for capacitive touch sensing without external ICs (vs PIC24FJ16MC102T-I/SO)
Design Notes
Place 1 uF and 0.1 uF ceramic decoupling capacitors within 5 mm of the VDD and AVDD pins to suppress switching noise from the PWM output transitions. For sensorless BLDC designs drawing large inrush currents, add a bulk 10-47 uF tantalum or aluminum-polymer capacitor near the bridge supply to prevent MCU brownouts during commutation.
Use a 4-layer PCB with a continuous ground plane directly beneath the TQFP-44 footprint for the best EMI/EMC performance. Keep the analog comparator inputs (AN0-AN5) physically separated from PWM output traces, and place 100 ohm series resistors at PWM outputs near the MCU to dampen ringing into the gate driver stage.
Do not exceed the absolute maximum 4.0V on VDD even briefly; sensorless motor applications often have VDD transients from the gate driver bootstrap circuit. Always use the BOR (Brown-Out Reset) feature enabled in the configuration bits to ensure the MCU enters a safe reset state if VDD dips below the operating threshold.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - use automotive-grade PIC24 parts for vehicle applications.