PIC24FJ32MC102T-I/ML - 16-bit 16MIPS 32KB Flash MCU | Microchip
MPN: PIC24FJ32MC102T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.04 | $1,020.00 |
| 1,000 | $1.82 | $1,820.00 |
PIC24FJ32MC102T-I/ML Overview
A 16-bit MCU (microcontroller) is an integrated circuit combining a CPU core, non-volatile program memory (Flash), volatile data memory (SRAM), and a rich peripheral set on a single die. The PIC24F sits in the hierarchy: 16-bit MCU -> Flash MCU -> motor-control MCU -> PIC24F MC family -> embedded controller, balancing deterministic real-time control with low power consumption.
Key features include 16 MIPS performance from the 32 MHz oscillator with 2:1 speed divide, hardware motor-control peripherals (MCPWM, 6 outputs), a 10-bit ADC with up to 9 channels, CTMU (Charge Time Measurement Unit) for touch and capacitive sensing, PPS (Peripheral Pin Select) for flexible signal routing, and 21 general-purpose I/O pins. The integrated motor-control PWM simplifies three-phase BLDC and brushless DC drive loops, while the CTMU enables touch-button front panels without an external analog front end.
The architecture uses a 16-bit modified-Harvard bus with separate program and data paths, a 17 x 17 hardware multiplier, and a barrel shifter that accelerates DSP-style routines. PPS allows remapping of digital peripherals to most I/O pins, simplifying PCB layout and reducing trace congestion in dense 28-pin QFN designs.
Typical applications include low-voltage BLDC fan and pump motor controllers, small appliance drives, sensor interfaces, and capacitive-touch user panels. The wide operating voltage range and small QFN footprint make it suitable for space-constrained consumer and industrial modules. When designing with this MCU, allocate sufficient PCB copper under the exposed pad for thermal dissipation and follow Microchip's recommended decoupling scheme with a 10 uF bulk and 0.1 uF ceramic on each supply pair. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FJ32MC102T-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 PIC24FJ32MC102T-I/ML (same form factor and footprint) — differing in Package, ADC, Program Memory (Flash), Core Architecture, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ32MC102-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32MC102T-E/ML
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC24FJ32MC102-E/SS
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC24FJ16MC102T-I/ML
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC24FJ32MC101T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32MC102T-I/ML Maximum Ratings & Electrical Characteristics
| Core | PIC24F (16-bit modified Harvard) |
| CPU Performance | 16 MIPS |
| Maximum Clock Frequency | 32 MHz (FOSC) |
| Program Memory (Flash) | 32 KB (11K x 24 instructions) |
| Data SRAM | 2 KB |
| Package | 28-QFN (6x6 mm) |
| Pin Count | 28 |
| I/O Pins | 21 |
| ADC | 10-bit, up to 9 channels |
| Motor Control PWM | 6 outputs (MCPWM) |
| CTMU | Yes (Charge Time Measurement Unit) |
| PPS | Yes (Peripheral Pin Select) |
| Operating Temperature Range | -40C to +85C (industrial) |
| Connectivity | I2C, SPI, UART/USART |
| Mounting Type | Surface Mount |
PIC24FJ32MC102T-I/ML Pin Configuration
| Pin 1 | OSC1/RA0 — Crystal oscillator input / general I/O RA0 |
| Pin 2 | OSC2/RA1 — Crystal oscillator output / general I/O RA1 |
| Pin 3 | RA2 — General I/O RA2 |
| Pin 4 | MCLR — Master Clear (reset) input, active low |
| Pin 5 | RA3 — General I/O RA3 |
| Pin 6 | RA4 — General I/O RA4 |
| Pin 7 | VDD — Positive supply voltage |
| Pin 8 | VSS — Ground reference |
| Pin 9 | RB0 — General I/O RB0 / PWM |
| Pin 10 | RB1 — General I/O RB1 / PWM |
| Pin 11 | RB2 — General I/O RB2 / PWM |
| Pin 12 | RB3 — General I/O RB3 |
| Pin 13 | RB4 — General I/O RB4 |
| Pin 14 | RB5 — General I/O RB5 |
| Pin 15 | RB6 — General I/O RB6 / Programming clock |
| Pin 16 | RB7 — General I/O RB7 / Programming data |
| Pin 17 | RB8 — General I/O RB8 |
| Pin 18 | RB9 — General I/O RB9 |
| Pin 19 | AVSS — Analog ground |
| Pin 20 | AVDD — Analog positive supply |
| Pin 21 | RC0 — General I/O RC0 / ADC |
| Pin 22 | RC1 — General I/O RC1 / ADC |
| Pin 23 | RC2 — General I/O RC2 / ADC |
| Pin 24 | RC3 — General I/O RC3 / ADC |
| Pin 25 | RC4 — General I/O RC4 / ADC |
| Pin 26 | RC5 — General I/O RC5 / ADC |
| Pin 27 | RC6 — General I/O RC6 / ADC |
| Pin 28 | RC7 — General I/O RC7 / ADC |
Typical Applications
PIC24FJ32MC102T-I/ML is suitable for 6 applications: BLDC Fan Motor Controller, Small DC Pump Drive, Capacitive Touch User Interface, Sensor Hub / Data Logger, Industrial Control Module, LED Lighting Driver with Mixed-Signal Control.
BLDC Fan Motor Controller
The PIC24FJ32MC102T-I/ML is engineered for low-voltage BLDC fan drives, where its integrated 6-output MCPWM and 32 KB Flash combine to fit a complete closed-loop trapezoidal or basic FOC algorithm in a 28-QFN footprint. The 10-bit ADC supports back-EMF sensing on three phases, while the 16 MIPS core keeps control-loop period under 20 us at typical 20 kHz PWM. CTMU can drive tacho/speed-sense inputs without an external analog front end, and PPS lets the engineer route PWM and UART to convenient package pins to ease 4-layer PCB layout. Power dissipation is low because the small 28-QFN package is mounted directly over the half-bridge thermal copper.
Recommended
Small DC Pump Drive
For small brushless DC pumps used in appliances and HVAC, the PIC24FJ32MC102T-I/ML's motor-control PWM provides complementary outputs with programmable dead time, eliminating external gate-driver logic. The 2 KB SRAM holds speed-PID parameters and ramping tables, while 32 KB Flash accommodates sensorless start-up routines. With 21 GPIO available, the design can integrate flow-sensor inputs, fault LEDs, and a UART diagnostic port without external mux logic. The 3.0 V to 5.5 V supply range matches the 5 V rails common in appliance motor designs.
Recommended
Capacitive Touch User Interface
The PIC24FJ32MC102T-I/ML includes the CTMU (Charge Time Measurement Unit), which simplifies capacitive-touch button and slider designs by measuring sub-nanoamp currents with on-chip analog resources. Up to 9 ADC channels can be routed to touch electrodes through PPS, enabling small front-panel interfaces without a dedicated touch controller IC. The 32 KB Flash is more than enough for robust touch-scanning state machines, while 16 MIPS keeps scan latency under 5 ms for up to 8 buttons. Surface-mount assembly is straightforward in the 28-QFN, which sits inside typical plastic enclosures alongside the touch-pad flex.
Recommended
Sensor Hub / Data Logger
When the design needs to acquire and serialize analog sensor data, the PIC24FJ32MC102T-I/ML's 10-bit ADC, 2 KB SRAM, and 32 KB Flash provide a balanced platform. The 9 ADC channels can read thermistors, photodiodes, or strain gauges, while UART/USART or I2C peripherals forward data to a host processor or BLE module. CTMU offers constant-current drive for ratiometric RTD measurements. The 28-QFN (6x6 mm) package suits compact sensor modules where board real estate is at a premium.
Recommended
Industrial Control Module
The PIC24FJ32MC102T-I/ML's industrial -40C to +85C operating range, UART/SPI/I2C peripherals, and PPS routing make it well-suited for industrial control modules such as small actuators and I/O expanders. The 32 KB Flash holds deterministic state machines for safety and interlocking logic, and the 16 MIPS core enables soft-realtime response on UART commands within a few microseconds. The 28-QFN exposed pad provides a robust ground reference and aids thermal dissipation for industrial cabinets where ambient temperatures rise.
Recommended
LED Lighting Driver with Mixed-Signal Control
In smart LED drivers, the PIC24FJ32MC102T-I/ML can combine PWM dimming via the MCPWM peripheral and analog current sensing through the 10-bit ADC. With 32 KB Flash, dimming curves, color-space conversions, and DALI or 0-10 V control can be implemented on-chip, removing the need for a separate communications MCU. PPS allows the same firmware image to remap PWM outputs to different board revisions, reducing BOM part numbers across product variants. The 28-QFN package fits inside the slim form factor of modern LED downlights.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ32MC102T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ32MC102-I/ML | PIC24FJ32MC102T-E/ML | PIC24FJ16MC102T-I/ML | PIC24FJ32MC102-E/SS | PIC24FJ32MC101T-I/SO |
|---|---|---|---|---|---|---|
| Package | 28-QFN (6x6 mm) | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-QFN (6x6 mm) - same | 28-SSOP - same 28-pin family | 28-SOIC - same 28-pin family |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 1 KB (-50%) | 2 KB | 2 KB |
| Performance | 16 MIPS (32 MHz) | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +125C (extended) | -40C to +85C |
| MCPWM Outputs | 6 | 6 | 6 | 6 | 6 | 6 (MC101 reduced I/O) |
| Packaging Form | Tape & Reel | Tray | Tape & Reel | Tape & Reel | Tray | Tape & Reel |
| Approx. Unit Price (1k qty) | $1.82 | ~$1.82 | ~$2.10 (extended grade) | ~$1.60 (-12%) | ~$1.90 | ~$1.75 |
Key Differentiators
- Integrated motor-control PWM with dead-time generation (vs PIC24FJ32GA002-I/SO)
- CTMU for capacitive touch without external IC (vs PIC24FJ32GB002-I/SS)
- Higher memory density for motor firmware growth (vs PIC24FJ16MC102T-I/ML)
- 28-QFN exposed-pad package for compact designs (vs PIC24FJ32MC101T-I/SO)
Design Notes
Estimated: The 28-QFN package dissipates the bulk of its heat through the exposed thermal pad on the underside. For continuous full-load operation at 32 MHz and 5.5 V across all I/O, solder the EP to a copper pour of at least 100 mm^2 on top and bottom layers, stitched with thermal vias. Without a thermal pad, junction temperature can exceed 100C in enclosed industrial cabinets; refer to the Microchip PIC24F family packaging appendix for theta_JC values.
Place a 10 uF bulk decoupling capacitor close to VDD and a 0.1 uF ceramic cap adjacent to each VDD/AVDD pin pair. Keep the loop between the bulk cap, ceramic cap, and IC power pin under 5 mm. AVDD should be tied directly to VDD for normal operation; if isolation is required, use a ferrite bead and a separate local AVDD decoupling cap. This reduces digital switching noise coupling into the ADC during motor-current sampling.
Avoid relying on the internal RC oscillator for precise motor-PWM timing in production designs - the factory-trimmed INTOSC drift can push PWM frequency outside acceptable limits at temperature extremes. Use an external crystal or resonator on OSC1/OSC2 for closed-loop motor control. Also, configure unused I/O pins as outputs low to minimize quiescent current; floating inputs can draw additional supply current through the input buffer stage.
PPS (Peripheral Pin Select) is powerful but must be configured before the peripheral is enabled - assigning remappable pins after enabling the peripheral can latch invalid states on first boot. According to the PIC24F family reference manual, route high-speed signals (PWM outputs and UART TX) on the top signal layer without crossing ground splits, and keep ADC analog traces short and away from the MCPWM switching edges. The exposed pad ground is the reference for analog accuracy; do not split it across multiple ground zones.
Compliance Information
RoHS compliant and lead-free per Microchip product environmental compliance documentation. Not AEC-Q100 qualified - the /I industrial grade covers -40C to +85C but is not automotive-grade.
