PIC24FJ32MC101-I/P - 16-bit 32KB Flash Motor Control MCU | Microchip
MPN: PIC24FJ32MC101-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.96 | $1.96 |
| 10 | $1.78 | $17.80 |
| 100 | $1.62 | $162.00 |
| 500 | $1.45 | $725.00 |
| 1,000 | $1.3 | $1,300.00 |
PIC24FJ32MC101-I/P Overview
What is a 16-bit motor control MCU? A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. A 16-bit MCU uses a 16-bit data path, which doubles the throughput of an 8-bit MCU while remaining cheaper and lower-power than 32-bit ARM Cortex devices. Motor-control MCUs add specialized PWM channels, fast ADCs, and quadrature encoder interfaces to drive brushed, brushless DC, or stepper motors without external logic. The PIC24FJ32MC101 sits in the hierarchy: microcontroller -> embedded MCU -> 16-bit MCU -> motor-control MCU -> PIC24F family -> PIC24FJ32MC101 sub-family.
Key features include up to 16 MIPS performance at 32 MHz, 6 channels of 10-bit ADC at 500 ksps, 5 timers, 3 analog comparators, 3 MCPWM channels with complementary outputs and dead-band control, plus standard communication peripherals including I2C, SPI, and UART. The CTMU enables touch sensing and precise time-based measurements such as capacitive sensing or simple gesture detection, while PPS allows digital peripheral pins to be remapped across most I/O pads, simplifying PCB layout.
Technically, the PIC24FJ32MC101 uses a Modified Harvard architecture with a 16-bit wide data path and 24-bit wide instructions, supported by a hardware multiplier for fast DSP-style operations. The wide instruction word accelerates compiled C code, and the 16-channel peripheral event system reduces CPU overhead. The CTMU block provides a constant-current source that, combined with ADC sampling, yields high-resolution timing for ultrasonic distance, capacitive touch, and time-of-flight applications.
Typical applications include BLDC and PMSM motor controllers, small DC and stepper motor drives, fan and pump controllers, RC servo and robotic actuators, low-cost position-control systems with quadrature encoder feedback, LED lighting drivers with constant-current regulation, and capacitive touch user interfaces. The wide operating range of 3.0V to 3.6V and industrial -40C to +85C temperature grade make it suitable for both consumer appliances and industrial equipment.
When designing with this part, place a 10uF bulk capacitor plus a 0.1uF decoupling capacitor adjacent to the VDD pin, keep the analog VDD/VSS traces short, and configure PPS carefully to avoid unintended peripheral pin collisions on the 20-pin package.
This page synthesizes distributor pricing, drop-in PIC24F family alternatives, and PCB design guidance not found on the standalone Microchip datasheet, giving engineers a single reference for selection, procurement, and layout.
Drop-in alternatives for PIC24FJ32MC101-I/P — 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 PIC24FJ32MC101-I/P (same form factor and footprint) — differing in Package, Operating Temperature, Mounting Type, Timers, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ32MC101-E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ16MC101-I/P
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC24FJ16MC102-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32MC102-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.54 / Unit
View Datasheet →DSPIC33FJ32MC101-I/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.18 / Unit
View Datasheet →PIC24FJ32MC101-I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit PIC24F Modified Harvard |
| Program Memory (Flash) | 32 KB (11K x 24 words) |
| RAM | 2 KB |
| Maximum CPU Speed | 16 MIPS at 32 MHz |
| Operating Voltage (VDD) | 3.0 V to 3.6 V |
| Package | 20-pin PDIP (through-hole) |
| Motor Control PWM (MCPWM) | 3 channels with complementary outputs and dead-band |
| ADC | 6 channels, 10-bit, 500 ksps |
| Analog Comparators | 3 |
| Timers | 5 (16-bit) |
| Communication | I2C, SPI, UART |
| CTMU | Yes (Charge Time Measurement Unit) |
| PPS | Yes (Peripheral Pin Select) |
| Operating Temperature | -40C to +85C (industrial grade) |
| Mounting Type | Through-Hole (PDIP) |
| RoHS Status | Compliant |
PIC24FJ32MC101-I/P Pin Configuration
| Pin 1 | RA0/AN0 — Digital I/O / analog input AN0 (PPS-capable) |
| Pin 2 | RA1/AN1 — Digital I/O / analog input AN1 |
| Pin 3 | RA2/AN2 — Digital I/O / analog input AN2 |
| Pin 4 | RA3/AN3 — Digital I/O / analog input AN3 |
| Pin 5 | RA4 — Digital I/O only |
| Pin 6 | VDD — Positive supply, 3.0V to 3.6V |
| Pin 7 | VSS — Ground reference |
| Pin 8 | OSC1/RA5 — Crystal oscillator input / digital I/O |
| Pin 9 | OSC2/RA6 — Crystal oscillator output / digital I/O |
| Pin 10 | RC0 — Digital I/O (PPS-capable) |
| Pin 11 | RC1 — Digital I/O (PPS-capable) |
| Pin 12 | RC2 — Digital I/O (PPS-capable) |
| Pin 13 | RC3 — Digital I/O (PPS-capable) |
| Pin 14 | RC4 — Digital I/O (PPS-capable) |
| Pin 15 | RC5 — Digital I/O (PPS-capable) |
| Pin 16 | RC6 — Digital I/O (PPS-capable) |
| Pin 17 | RC7 — Digital I/O (PPS-capable) |
| Pin 18 | RB0 — Digital I/O (PPS-capable) |
| Pin 19 | RB1 — Digital I/O (PPS-capable) |
| Pin 20 | MCLR — Master Clear (reset, active low) |
Typical Applications
PIC24FJ32MC101-I/P is suitable for 6 applications: BLDC and PMSM Motor Control, Small DC and Stepper Motor Drives, Fan and Pump Speed Controllers, Capacitive Touch User Interfaces, LED Lighting Drivers with Dimming, Robotics and RC Servo Control.
BLDC and PMSM Motor Control
The PIC24FJ32MC101-I/P is purpose-built for sensorless and sensored BLDC/PMSM motor drives. Its 3 MCPWM channels deliver complementary outputs with programmable dead-band, which prevents shoot-through in the half-bridge. Six 10-bit ADC channels sampled at 500 ksps capture back-EMF or current-sense signals within a single PWM period; at 16 MIPS the firmware can run a full FOC loop including Clark/Park transforms every PWM cycle. Use a 10uF bulk plus 0.1uF decoupling on VDD and keep the analog VDD/VSS traces short.
Recommended
Small DC and Stepper Motor Drives
For brushed DC and bipolar stepper motor control, the PIC24FJ32MC101-I/P provides precise PWM generation and quadrature feedback handling. The CTMU can drive the timing-current source for bipolar stepper microstepping tables, while PPS lets the designer remap PWM outputs to any I/O pin, simplifying PCB layout. Power dissipation remains low because the part runs at 3.3 V, so most loads are switched by external MOSFETs like the Si2302 driven directly from a GPIO pin.
Recommended
Fan and Pump Speed Controllers
The PIC24FJ32MC101-I/P's 16 MIPS throughput and dedicated MCPWM make it well suited for closed-loop fan and pump controllers. A single MCPWM channel drives the switching FET, the ADC samples tach or current feedback, and the firmware regulates RPM or flow. Industrial-grade -40C/+85C operation supports outdoor and appliance environments. Decoupling: place a 10uF tantalum + 0.1uF ceramic close to VDD, and route the analog VDD/VSS pair as a star ground to minimize switching noise coupling into the ADC.
Recommended
Capacitive Touch User Interfaces
The CTMU peripheral combined with the 10-bit ADC gives the PIC24FJ32MC101-I/P a built-in capacitive touch controller. Touch pads are formed from PCB copper and connected to ADC inputs; the CTMU delivers a constant current while the ADC samples the resulting voltage ramp, yielding high-resolution capacitance readings. The PIC24FJ16MC101-I/P or MC102 family shares the same CTMU for drop-in alternative BOMs. PPS is useful for routing the touch channels to convenient pads on the 20-pin PDIP.
Recommended
LED Lighting Drivers with Dimming
For constant-current LED drivers and dimmable lighting, the PIC24FJ32MC101-I/P uses one MCPWM channel to switch a constant-current regulator at high frequency and the ADC to monitor sense-resistor current. PWM duty cycle sets brightness with 16-bit resolution, and PPS allows the dim control to be remapped to any I/O pin. Industrial temperature grade supports outdoor luminaires. Add a TVS diode across the LED string for transient protection on industrial installations.
Recommended
Robotics and RC Servo Control
Hobby robotics and RC servo controllers benefit from the PIC24FJ32MC101-I/P's compact 20-pin PDIP footprint and rich timer set. Five 16-bit timers generate precise 50 Hz servo pulses with microsecond resolution, while UART enables Bluetooth or wireless module control. The CTMU can read potentiometers or hall sensors for closed-loop position control. Industrial temperature range tolerates motor self-heating in enclosed chassis.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ32MC101-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ32MC101-E/P | PIC24FJ16MC101-I/P | PIC24FJ16MC102-I/P | PIC24FJ32MC102-I/SO | dsPIC33FJ32MC101-I/P |
|---|---|---|---|---|---|---|
| Package | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 28-pin SOIC | 20-pin PDIP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 16 KB | 16 KB | 32 KB | 16 KB (DSP variant) |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Max CPU Speed | 16 MIPS / 32 MHz | 16 MIPS / 32 MHz | 16 MIPS / 32 MHz | 16 MIPS / 32 MHz | 16 MIPS / 32 MHz | 40 MIPS / 80 MHz (DSP) |
| MCPWM Channels | 3 | 3 | 3 | 3 | 3 | 3 |
| ADC Channels | 6 x 10-bit | 6 x 10-bit | 6 x 10-bit | 6 x 10-bit | 6 x 10-bit | 6 x 10-bit |
| Operating Temperature | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Approx Unit Price (qty 1000) | $1.30 | approx $1.40 (est.) | approx $1.15 (est.) | approx $1.20 (est.) | approx $1.45 (est.) | approx $2.10 (est.) |
Key Differentiators
- Integrated 3-channel Motor Control PWM with dead-band (vs PIC24FJ16MC101-I/P)
- CTMU plus PPS in a 20-pin footprint (vs dsPIC33FJ32MC101-I/P)
- Wide industrial temperature range with rich peripherals (vs PIC24FJ32MC102-I/SO)
Design Notes
Decouple VDD with a 10uF tantalum or ceramic bulk capacitor plus a 0.1uF ceramic placed within 5 mm of the VDD pin. The PIC24FJ32MC101-I/P operates from 3.0V to 3.6V; a low-noise LDO such as MCP1700 is recommended upstream of any switching regulator to keep ADC reference noise below 1 LSB. Bond a single ground plane and route the analog VDD/VSS pair as a star to the regulator output.
Keep the 20-pin PDIP footprint compact: route power and ground on the inner layers as a 4-layer stackup if possible. Isolate the analog ADC traces from PWM switching traces; place a ground guard ring around analog inputs AN0-AN3 to reduce digital switching noise. Place the crystal within 5 mm of OSC1/OSC2 with short, symmetric traces and a guard ground.
Do not exceed 3.6V on any I/O pin, including the MCLR pin, or latch-up may occur. Configure unused I/O pins as outputs driven low, never as floating inputs. When using PPS, verify that no two peripherals are mapped to the same physical pin; the configuration lock registers must be unlocked before changes. Always set the PWMLOCK and CFGCON bits appropriately before programming production firmware.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified in standard grade; automotive designs require PIC24FJ32MC101-E/P or specific V-purchase codes per the manufacturer datasheet.
