PIC24FJ32MC101T-E/SO - 16-bit Motor Control MCU, 20-SOIC | Microchip
MPN: PIC24FJ32MC101T-E/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.74 | $274.00 |
| 500 | $2.41 | $1,205.00 |
| 1,000 | $2.13 | $2,130.00 |
PIC24FJ32MC101T-E/SO Overview
This device belongs to the 16-bit microcontroller category (MCU -> microcontroller -> embedded processor -> semiconductor). A 16-bit MCU integrates a CPU core, program memory (Flash), data memory (SRAM), and configurable peripherals on a single die; PIC24F devices use a modified Harvard architecture running the PIC instruction set at up to 16 MIPS for motor-control tasks such as BLDC commutation and PFC.
Key features include 32 KB of Flash program memory (11K x 24 words), 2 KB of SRAM, three 16-bit MCPWM channels with complementary or independent outputs, three on-chip analog comparators, a Charge Time Measurement Unit (CTMU) for capacitive touch, Peripheral Pin Select (PPS) for flexible I/O mapping, and a Real-Time Clock Calendar (RTCC) module.
The 16 MIPS modified-Harvard core delivers deterministic interrupt latency that is critical for field-oriented control loops running at tens of kHz. PPS removes the fixed-pin peripheral constraint of older PIC16/PIC18 parts, and the CTMU adds cost-effective capacitive-touch sensing.
Typical applications include low-cost BLDC and PMSM motor drives (fans, pumps, small appliances), DC-DC converter control loops, LED lighting controllers, capacitive-touch user interfaces, and automotive body modules that operate over the extended temperature range.
When designing with this device, plan I/O assignments around the PPS mapping (each peripheral function can be assigned to one of several pins), and reserve one timer for the PWM time base. Note that the SO package has fewer I/O than the QFN variant; pin-limited applications should consider PIC24FJ32MC102.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found in the manufacturer datasheet alone, enabling faster component selection for motor-control and embedded designs.
Drop-in alternatives for PIC24FJ32MC101T-E/SO — 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 PIC24FJ32MC101T-E/SO (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Core, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ32MC101-E/SO
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC24FJ32MC101T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ32MC101-I/P
✅ Drop-In✓ In Stock
$1.3 / Unit
View Datasheet →PIC24FJ16MC101T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC24FJ16MC102T-I/SO
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC24FJ32MC101T-E/SO Maximum Ratings & Electrical Characteristics
| Core | PIC24F 16-bit RISC (modified Harvard) |
| Program Memory (Flash) | 32 KB (11K x 24 words) |
| Data Memory (SRAM) | 2 KB |
| Maximum CPU Speed | 16 MIPS (32 MHz) |
| Operating Voltage Range | 3.0 V to 3.6 V |
| Package | 20-pin SOIC (SO) |
| Pin Count | 20 |
| MCPWM Channels | 3 (16-bit) |
| Analog Comparators | 3 |
| CTMU (Charge Time Measurement Unit) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Real-Time Clock Calendar (RTCC) | Yes |
| Temperature Grade | E (Automotive, -40C to +125C) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life at <=30C/85% RH) |
| RoHS Status | Compliant |
PIC24FJ32MC101T-E/SO Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input, active-low |
| Pin 2 | RA0 — Analog/Digital I/O with PPS remap |
| Pin 3 | RA1 — Analog/Digital I/O with PPS remap |
| Pin 4 | RB0 — Digital I/O with PPS remap, PGED1 |
| Pin 5 | RB1 — Digital I/O with PPS remap, PGEC1 |
| Pin 6 | RB2 — Digital I/O with PPS remap |
| Pin 7 | RB3 — Digital I/O with PPS remap |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1 — Crystal oscillator input or CLKI |
| Pin 10 | OSC2 — Crystal oscillator output or CLKO |
| Pin 11 | RB4 — Digital I/O with PPS remap |
| Pin 12 | RA2 — Analog/Digital I/O with PPS remap |
| Pin 13 | RA3 — Analog/Digital I/O with PPS remap |
| Pin 14 | RB5 — Digital I/O with PPS remap |
| Pin 15 | RB6 — Digital I/O with PPS remap |
| Pin 16 | RB7 — Digital I/O with PPS remap |
| Pin 17 | RA4 — Analog/Digital I/O with PPS remap |
| Pin 18 | AVDD — Analog supply voltage |
| Pin 19 | AVSS — Analog ground reference |
| Pin 20 | VDD — Digital supply voltage (3.0V to 3.6V) |
Typical Applications
PIC24FJ32MC101T-E/SO is suitable for 7 applications: Low-Cost BLDC Fan Control, Small Appliance Motor Drive, DC-DC Converter Digital Control, LED Lighting Controllers, Capacitive-Touch User Interface, Automotive Body and Climate Modules, Solar Microinverter and Power Optimizer.
Low-Cost BLDC Fan Control
The PIC24FJ32MC101T-E/SO is well suited to low-cost 3-phase BLDC fan and pump drives because its three 16-bit MCPWM channels can directly produce center-aligned complementary PWM with configurable dead time, and the on-chip analog comparators provide hardware over-current protection that triggers PWM shutdown without software latency. At 16 MIPS, the core has sufficient throughput to handle sensorless back-EMF commutation at several kHz switching frequency while leaving cycles for thermal foldback. Placed between a 3.3V LDO and a three-phase gate driver such as the MCP16331, the MCU drives small 12V/24V fans and pumps in a compact SOIC-20 footprint. Unlike 8-bit MCUs, the 16-bit core simplifies PID loop math for closed-loop RPM regulation.
Recommended
Small Appliance Motor Drive
The PIC24FJ32MC101T-E/SO fits small-appliance motor drives such as washing-machine drain pumps, refrigerator fans, and vacuum-cleaner brushless drives because it integrates three MCPWM outputs, three comparators, and 32 KB of Flash in a single 20-pin SOIC. The automotive -40C to +125C E temperature grade ensures reliable operation in hot appliance enclosures. With PPS, designers can route PWM outputs and comparator inputs to almost any pin, simplifying PCB layout when migrating from PIC16/PIC18 designs. Estimated firmware for sensorless trapezoidal commutation fits comfortably in the 32 KB Flash budget.
Recommended
DC-DC Converter Digital Control
The PIC24FJ32MC101T-E/SO can serve as the digital controller for DC-DC converters and digital-power supplies because the 16 MIPS core runs voltage-mode and peak-current-mode control loops with sub-microsecond resolution while the high-speed analog comparators provide hardware cycle-by-cycle current limiting. The MCPWM channels can be repurposed as high-resolution PWM outputs for synchronous buck or boost stages, and the RTCC enables timed sequencing for multi-rail supplies. The 32 KB Flash budget supports state-machine plus telemetry firmware (PMBus, UART). The automotive temperature grade suits industrial power-supply designs that demand extended thermal margin.
Recommended
LED Lighting Controllers
The PIC24FJ32MC101T-E/SO suits LED lighting drivers and dimmer controllers because the MCPWM outputs generate high-resolution dimming PWM while the CTMU enables capacitive-touch dimming buttons, replacing mechanical switches. The 16 MIPS core executes color-mixing algorithms for RGBW fixtures and supports DMX-512 or DALI lighting protocols via UART. With 32 KB of Flash and 2 KB of RAM, designers can implement stateful lighting scenes and daylight-harvesting control loops. The automotive E-grade temperature rating makes the part attractive for outdoor and industrial luminaires that must operate from -40C to +125C.
Recommended
Capacitive-Touch User Interface
The PIC24FJ32MC101T-E/SO is a strong fit for capacitive-touch user interfaces because the on-chip CTMU peripheral measures capacitance changes via charge-timing, supporting buttons, sliders, and proximity sensors without external touch ICs. The 16 MIPS throughput handles mTouch firmware with debouncing, gesture recognition, and LED feedback in real time, while PPS allows touch channels to be reassigned to spare GPIOs as designs evolve. Combined with automotive E-grade temperature rating, this part works for white-goods, industrial-control panels, and automotive body modules. The 32 KB Flash budget supports rich HMI libraries.
Recommended
Automotive Body and Climate Modules
The PIC24FJ32MC101T-E/SO is suitable for low-end automotive body controllers such as HVAC blend-door actuators, mirror controllers, seat adjusters, and lighting modules because the automotive -40C to +125C E temperature grade matches AEC-Q100 environmental expectations (though the part itself is not AEC-Q100 qualified). The MCPWM channels drive small brushed and brushless actuators, while the 16 MIPS core runs LIN slave stacks for body-network connectivity. With PPS, the same firmware supports multiple PCB variants, reducing development cost. Compact 20-pin SOIC packaging keeps the PCB small enough to fit inside actuators and small modules.
Recommended
Solar Microinverter and Power Optimizer
The PIC24FJ32MC101T-E/SO fits sub-100W solar microinverter and DC power-optimizer modules because the three MCPWM channels can drive a single-phase inverter or interleaved boost stage, and the high-speed comparators handle MPPT cycle-by-cycle current limiting. The automotive E temperature grade supports outdoor enclosure temperatures, and the RTCC can time-stamp fault and telemetry events for O&M analytics. The 32 KB Flash holds MPPT and anti-islanding firmware, and the 2 KB SRAM is sufficient for control-loop variables and a small telemetry buffer. PPS flexibility allows board revisions without firmware changes.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ32MC101T-E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ32MC101-E/SO | PIC24FJ32MC101T-I/SO | PIC24FJ16MC101T-I/SO | PIC24FJ16MC102T-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SOIC | 20-pin SOIC - same | 20-pin SOIC - same | 20-pin SOIC - same | 20-pin SOIC - same |
| Flash Program Memory | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 16 KB (-50%) |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| MCPWM Channels | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit | 3 x 16-bit |
| Temperature Grade | Automotive E (-40C to +125C) | Automotive E (-40C to +125C) | Industrial I (-40C to +85C) | Industrial I (-40C to +85C) | Industrial I (-40C to +85C) |
| Maximum CPU Speed | 16 MIPS (32 MHz) | 16 MIPS (32 MHz) | 16 MIPS (32 MHz) | 16 MIPS (32 MHz) | 16 MIPS (32 MHz) |
| CTMU (Capacitive Touch) | Yes | Yes | Yes | Yes | Yes |
| Operating Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Approx. Unit Price (qty 1) | $3.42 | $3.40 | $3.10 | $2.90 | $2.95 |
Key Differentiators
- Integrated CTMU for capacitive touch without external IC (vs PIC24FJ32GA002T-I/SO)
- Automotive E temperature grade at industrial-grade cost (vs PIC24FJ32MC101T-I/SO)
- 3 MCPWM channels in 20-pin SOIC (vs PIC24FJ16MC101T-I/SO)
- Microchip PIC24F ecosystem with free MPLAB X IDE (vs STM32F031G6 (cross-brand STM32))
Design Notes
Power the PIC24FJ32MC101T-E/SO from a 3.3V LDO with at least 50 mA headroom for I/O switching transients. Place a 100 nF decoupling capacitor within 5 mm of each VDD/AVDD pin pair, plus a 10 uF bulk capacitor near the IC. Use a separate analog ground (AVSS) tied to digital ground (VSS) at a single point under the IC to keep digital switching noise out of the analog comparator inputs. A common-mode choke on the supply is optional but recommended for noisy motor environments.
Do not forget to configure the PPS registers before relying on peripheral outputs - peripherals default to disabled I/O on reset. The MCLR pin (pin 1) must be pulled high through a 10 kohm resistor for normal operation; if unused, tie it directly to VDD. The CTMU requires a current-source calibration step in firmware for accurate capacitive touch readings; skip this and the touch sensitivity drifts with temperature and VDD. Programming via ICSP requires both PGED1 (RB0) and PGEC1 (RB1) accessible - do not lock these pins into output-only modes via PPS without preserving the programming function.
Keep MCPWM output traces short and matched in length to avoid PWM timing skew between phases. Route the analog comparator inputs (C1IN+, C1IN-, etc.) away from PWM switching nodes and gate-drive traces to prevent false triggering. Place the crystal or external clock source within 10 mm of the OSC1/OSC2 pins and guard the traces with a ground pour to minimize EMI susceptibility. The 20-pin SOIC has limited thermal dissipation - for designs approaching 50 mA continuous I/O current, add a copper pour under the IC tied to VSS to spread heat.
The MCPWM outputs can produce fast edges (a few ns) that radiate EMI on long traces; series ferrite beads or 22 ohm damping resistors placed within 5 mm of the MCU pin reduce ringing without significantly slowing the gate drive. For motor-control designs, isolate the digital ground island from the power-stage ground using a ferrite or split-plane technique to prevent switching noise from coupling into the analog comparators. Estimate: a 10 cm unshielded PWM trace can radiate 30 dBuV/m at 32 MHz fundamental - place the MCU close to the gate driver to keep traces short.
Estimated: at maximum CPU activity (16 MIPS, all peripherals active, all I/O switching at 10 MHz), the PIC24FJ32MC101T-E/SO in 20-pin SOIC dissipates roughly 50 mW from VDD current plus I/O switching losses. With theta_JA around 70 C/W for SOIC-20 on a 2-layer FR4 board, this yields a junction temperature rise of about 3.5 C above ambient - well within the 125 C automotive limit. For designs in enclosed fixtures with limited airflow, add copper pours on VDD/VSS to drop theta_JA closer to 50 C/W.
Compliance Information
E temperature grade (-40C to +125C) per Microchip ordering information, but the part is not AEC-Q100 qualified - this is a temperature grade only, not an automotive qualification. For AEC-Q100 qualified alternatives, contact Microchip for the dsPIC33AEC family. RoHS and REACH compliance per Microchip product page.
