PIC24FJ32MC102-I/SP - 16-bit 16 MIPS 32KB Flash MCU | Microchip
MPN: PIC24FJ32MC102-I/SP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.27 | $227.00 |
| 500 | $1.98 | $990.00 |
| 1,000 | $1.72 | $1,720.00 |
PIC24FJ32MC102-I/SP Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and programmable peripherals. Within the broader taxonomy, an MCU sits below microprocessor (MPU) and above specific function ICs; the PIC24F is a 16-bit Harvard-architecture MCU family from Microchip that uses modified Harvard organization with separate program and data buses, a wide 16-bit datapath, and a C-friendly instruction set. The "FJ" suffix denotes the Flash-memory, low-power variant with nanoWatt XLP deep-sleep modes; the "MC" suffix marks the motor-control peripheral subset; and the "102" ordering code indicates the 32 KB Flash / 2 KB RAM density tier.
Key features include three 16-bit timers, up to 21 I/O pins with Peripheral Pin Select (PPS) remappable inputs/outputs, four 10-bit ADC channels at 500 ksps, two analog comparators, and a 5-bit DAC reference. Communication interfaces include I2C, SPI, and UART with LIN support. The device operates from 2.0 V to 3.6 V across an industrial -40 °C to +85 °C temperature range and includes a real-time clock/calendar (RTCC) module and a charge-pump regulator for battery-backup.
Typical applications include low-cost BLDC and PMSM motor drives, small appliance controls, ceiling fans, pumps, valve actuators, and consumer products that need a compact MCU with integrated PWMs and ADC. The wide operating voltage and CTMU peripheral also make it suitable for sensor-interface front ends with capacitive touch input.
When designing with this device, ensure your schematic respects the PPS input/output mapping table from the family reference manual and reserves the correct ICSP pins (PGECx/PGEDx). For motor-control loops exceeding 10 kHz PWM frequency at full ADC conversion load, validate ISR budget against the 16 MIPS budget before adding additional software modules.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, organized for engineers comparing motor-control MCU options.
Drop-in alternatives for PIC24FJ32MC102-I/SP — 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 PIC24FJ32MC102-I/SP (same form factor and footprint) — differing in Package, Mounting Type, Core Architecture, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ32MC102-I/SS
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →PIC24FJ32MC102-I/SO
✅ Drop-In✓ In Stock
$2.54 / Unit
View Datasheet →PIC24FJ32MC102-E/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ32MC104-I/SP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24FJ32MC101-I/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.3 / Unit
View Datasheet →PIC24FJ32MC102-I/SP Maximum Ratings & Electrical Characteristics
| Family | PIC24F 16-bit MCU |
| Core Architecture | 16-bit modified Harvard |
| Program Memory (Flash) | 32 KB (11K x 24 words) |
| RAM | 2 KB |
| Max CPU Speed | 16 MIPS at 32 MHz |
| Operating Voltage (VDD) | 2.0 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| I/O Pins | 21 |
| Motor Control PWM | 6-channel MCPWM, 16-bit resolution |
| Timers | 3 x 16-bit Timer/Counter |
| Communication | I2C, SPI, UART (with LIN support) |
| CTMU (Charge Time Measurement Unit) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Package | 28-pin SPDIP (SP), 0.300 in (7.62 mm) body width, through-hole |
| Mounting Type | Through-Hole |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| MSL Level | Not applicable (through-hole package) |
PIC24FJ32MC102-I/SP Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0 — Port A bit 0 / AN0 / VREF+ |
| Pin 3 | RA1 — Port A bit 1 / AN1 / VREF- |
| Pin 4 | PGED1 — ICSP programming data |
| Pin 5 | PGEC1 — ICSP programming clock |
| Pin 6 | RB0 — Port B bit 0 / AN2 |
| Pin 7 | RB1 — Port B bit 1 / AN3 |
| Pin 8 | RB2 — Port B bit 2 / AN4 |
| Pin 9 | OSCI — Crystal oscillator input or external clock |
| Pin 10 | OSCO — Crystal oscillator output |
| Pin 11 | RB3 — Port B bit 3 / AN5 |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | RB4 — Port B bit 4 / AN6 |
| Pin 14 | RB5 — Port B bit 5 / AN7 |
| Pin 15 | RB6 — Port B bit 6 / AN8 |
| Pin 16 | RB7 — Port B bit 7 / AN9 |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | VSS — Ground reference |
| Pin 19 | VDD — Positive supply 2.0 V to 3.6 V |
| Pin 20 | RA2 — Port A bit 2 / AN10 / CVREF |
| Pin 21 | RA3 — Port A bit 3 / AN11 |
| Pin 22 | RA4 — Port A bit 4 / AN12 |
| Pin 23 | RA5 — Port A bit 5 / AN13 |
| Pin 24 | RA6 — Port A bit 6 / AN14 |
| Pin 25 | RA7 — Port A bit 7 / AN15 |
| Pin 26 | RB8 — Port B bit 8 / AN16 |
| Pin 27 | RB9 — Port B bit 9 / AN17 |
| Pin 28 | RB10 — Port B bit 10 / AN18 |
Typical Applications
PIC24FJ32MC102-I/SP is suitable for 7 applications: BLDC Fan Motor Control, Small Appliance Control (Mixers / Blenders), Hobby Servo / Stepper Drive, Pump / Valve Actuator Control, Capacitive Touch User Interface, Battery-Powered Wireless Sensor Node, Industrial Sensor Hub.
BLDC Fan Motor Control
The PIC24FJ32MC102-I/SP is well matched to BLDC ceiling and table fans where the 6-channel MCPWM delivers three complementary PWM pairs with programmable dead time, the 16 MIPS core executes back-EMF zero-cross detection at 16 kHz, and the CTMU handles speed-control capacitive touch keys. Its 2.0-3.6 V supply and -40 to +85 °C industrial temperature support continuous duty from cold garages to hot attics, while 2 KB RAM buffers field-weakening lookup tables.
Recommended
Small Appliance Control (Mixers / Blenders)
For kitchen appliances the PIC24FJ32MC102-I/SP integrates PWM, ADC and CTMU in one 28-pin SPDIP, eliminating external timers and op-amps. The 16 MIPS performance handles speed-profiling loops at 1 kHz while sensing current via the 10-bit ADC. Operating voltage 2.0-3.6 V supports direct 3.3 V regulated rails from USB or 3-cell alkaline packs, and the SPDIP package eases hand-soldering for low-volume SKUs.
Recommended
Hobby Servo / Stepper Drive
The PIC24FJ32MC102-I/SP can drive stepper motors through its PWM and Timer modules, with the 16 MIPS core executing acceleration ramps and microstepping tables at real-time rates. PPS remapping lets the designer assign PWM outputs to any I/O, simplifying PCB routing for unipolar steppers. The 2 KB RAM holds acceleration/deceleration profiles while 32 KB Flash stores the full motion library.
Recommended
Pump / Valve Actuator Control
For 12 V and 24 V brushless DC pumps and solenoid valves, the PIC24FJ32MC102-I/SP's MCPWM with dead-time insertion avoids shoot-through on the half-bridge stages, while the ADC monitors current for dry-run protection and PID-based pressure regulation. Industrial -40 to +85 °C operation covers outdoor HVAC and water-system installations, and the 28-pin SPDIP eases rework in field-installed controls.
Recommended
Capacitive Touch User Interface
The CTMU peripheral converts the PIC24FJ32MC102-I/SP into a capacitive-touch MCU capable of measuring charge times on 16+ electrodes, ideal for slider and button interfaces on appliances. Combined with PPS remapping, touch channels can be assigned to any spare I/O without PCB redesign. The 16 MIPS core debounces and filters gestures in firmware, while 32 KB Flash holds multiple UI state machines.
Recommended
Battery-Powered Wireless Sensor Node
For Zigbee or LoRa sensor end nodes, the PIC24FJ32MC102-I/SP provides 32 KB Flash for protocol stacks and 2 KB RAM for buffers, while nanoWatt XLP idle modes drop quiescent current below 1 µA for battery life in the 1-3 year range. The ADC and CTMU interface to temperature, humidity and PIR sensors, and UART/SPI host a wireless transceiver module operating from the same 3.3 V rail.
Recommended
Industrial Sensor Hub
The PIC24FJ32MC102-I/SP is appropriate as an industrial sensor hub aggregating analog and digital inputs, where the 10-bit ADC reads process variables and the UART/SPI interfaces forward data to a PLC or gateway. The -40 to +85 °C industrial temperature rating and 28-pin SPDIP package support DIN-rail enclosures and field wiring. PPS remapping allows the SPI, UART and I2C peripherals to be routed for optimum PCB layout.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ32MC102-I/SP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ32MC102-I/SS | PIC24FJ32MC102-I/SO | PIC24FJ32MC102-E/SP | PIC24FJ32MC104-I/SP | PIC24FJ32MC101-I/P |
|---|---|---|---|---|---|---|
| Package | SPDIP-28 | SSOP-28 | SOIC-28 | SPDIP-28 (same) | SPDIP-28 (same) | SPDIP-28 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB (same) | 32 KB (same) | 32 KB (same) | 64 KB (+100%) | 32 KB (same) |
| RAM | 2 KB | 2 KB (same) | 2 KB (same) | 2 KB (same) | 2 KB (same) | 1 KB (-50%) |
| CPU Speed | 16 MIPS / 32 MHz | 16 MIPS / 32 MHz | 16 MIPS / 32 MHz | 16 MIPS / 32 MHz | 16 MIPS / 32 MHz | 16 MIPS / 32 MHz |
| Operating Temperature | -40 °C to +85 °C (I grade) | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +125 °C (E grade) | -40 °C to +85 °C | -40 °C to +85 °C |
| Motor Control PWM | 6-channel MCPWM, 16-bit | 6-channel MCPWM, 16-bit | 6-channel MCPWM, 16-bit | 6-channel MCPWM, 16-bit | 6-channel MCPWM, 16-bit | 6-channel MCPWM, 16-bit |
| Operating Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
Key Differentiators
- Dedicated 6-channel MCPWM with dead-time and complementary outputs (vs PIC24FJ32GA002-I/SP)
- Integrated CTMU for capacitive touch and time-of-flight sensing (vs PIC24FJ32GP205-I/PT)
- Peripheral Pin Select (PPS) for flexible peripheral routing (vs PIC24F32KA302-I/SP)
Design Notes
Estimated: at full 32 MHz / 16 MIPS operation, the PIC24FJ32MC102-I/SP core current is approximately 15 mA at 3.3 V; add 2-3 mA for ADC and PWM activity, totaling around 18 mA. For battery-powered designs, leverage the nanoWatt XLP sleep modes - deep-sleep current drops below 1 µA but the core and most peripherals stop, so wake via RTCC or external interrupt.
Place a 0.1 µF decoupling capacitor as close as possible to the VDD pin (pin 19) and a bulk 1-10 µF tantalum or ceramic on the same rail. The AVDD (if exposed on this package) requires its own 0.1 µF + 10 µF decoupling pair. Keep the crystal traces short and symmetric, and route the MCLR line away from PWM outputs to avoid false resets during high-dV/dt switching events.
Do not connect any two I/O pins directly to VDD or VSS via low-impedance paths if they are configured as outputs - shoot-through can exceed absolute maximum ratings. Always configure unused I/O as outputs driven low (not high-impedance) to minimize SCL/ICSP sensitivity. Verify PPS input/output mapping after any code change - remapping an output function to a pin used by the ICSP module can brick the device until a high-voltage programmer recovers it.
When using the 10-bit ADC at 500 ksps, place an RC antialiasing filter (typically 1 kΩ + 100 pF) between the analog source and the ANx pin; the -3 dB corner at 1.6 MHz rejects above-Nyquist noise without slowing the 2 µs acquisition time. Use independent ground traces for analog (AGND) and digital (DGND) returns, tying them together only at the device's VSS pin.
Compliance Information
RoHS compliant per Microchip product page. Industrial temperature range -40 to +85 °C. AEC-Q100 not applicable - this is a general-purpose MCU; for automotive-grade equivalent use PIC24FJ series with /VAO suffix.
