PIC24FJ16MC102-I/SS - 16-bit 16KB Flash MCU, 28-SSOP | Microchip
MPN: PIC24FJ16MC102-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.75 | $275.00 |
| 500 | $2.46 | $1,230.00 |
| 1,000 | $2.21 | $2,210.00 |
PIC24FJ16MC102-I/SS Overview
A 16-bit microcontroller (MCU) is a microprocessor core that processes data in 16-bit chunks, offering a balance between 8-bit efficiency and 32-bit performance for embedded applications. Within the broader taxonomy, the PIC24FJ belongs to: 16-bit MCU -> PIC24F family -> PIC24FJ MC (motor control) sub-family -> Flash microcontroller -> embedded controller -> semiconductor. The 'FJ' suffix indicates a Flash-based, low-power variant, while the 'MC' marker designates motor-control-targeted peripherals. The 'I/SS' suffix specifies the industrial temperature grade (-40C to +85C) and 28-pin SSOP (Shrink Small Outline Package) form factor.
Key features include three 16-bit timers plus one 32-bit timer, a 6-channel 10-bit ADC, up to 21 general-purpose I/O pins with 5 V tolerance on selected pins, and dedicated Motor Control PWM (MCPWM) outputs. Peripheral Pin Select (PPS) allows flexible remapping of digital peripherals to physical pins, simplifying PCB layout. The device also provides an RTCC, two UART/SPI/I2C capable Enhanced UARTS, and on-chip 32 kHz low-power oscillator support.
Architecturally, the PIC24FJ16MC102 uses a modified Harvard CPU core with a 16-bit data path and 24-bit instructions, achieving deterministic interrupt latency that is critical for motor-control loops. The integrated CTMU (Charge Time Measurement Unit) enables touch, proximity, and time-of-flight measurements without external analog front ends.
Typical applications include BLDC and PMSM motor controllers, sensorless fan control, small appliance drives (pumps, mixers), LED lighting drivers with dimming, and low-end digital power conversion such as small DC-DC converters and PFC stages.
When designing with this MCU, ensure proper decoupling (100 nF plus 10 uF bulk) near VDD/VSS, follow Microchip AN1078 for sensorless BLDC firmware, and budget for programming/debug via the 2-wire PGECx/PGEDx ICSP interface.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the PIC24FJ16MC102-I/SS that are not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC24FJ16MC102-I/SS — 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 PIC24FJ16MC102-I/SS (same form factor and footprint) — differing in Package, ADC, Program Memory (Flash), Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC24FJ16MC101-I/SS
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC24FJ16MC102T-I/SS
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →PIC24FJ32MC102-I/SS
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →PIC24FJ16MC101-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.95 / Unit
View Datasheet →PIC24FJ16MC102-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit PIC24F Modified Harvard |
| Instruction Set | 16-bit data path, 24-bit instructions |
| Program Memory (Flash) | 16 KB (5.5K x 24) |
| RAM | 1 KB |
| Maximum CPU Speed | 32 MHz (16 MIPS) |
| Operating Voltage | 3.0 V to 3.6 V |
| I/O Pins | Up to 21 |
| ADC | 6-channel, 10-bit |
| Timers | 3 x 16-bit + 1 x 32-bit |
| Motor Control PWM (MCPWM) | Yes, dedicated outputs |
| Peripheral Pin Select (PPS) | Yes |
| Communication | 2x Enhanced UART (LIN/SPI/I2C), SPI, I2C |
| CTMU (Charge Time Measurement Unit) | Yes |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-pin SSOP (5.30 mm body width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Programming/Debug | ICSP via PGECx/PGEDx |
PIC24FJ16MC102-I/SS Pin Configuration
| Pin 1 | MCLR — Master Clear (Reset) input |
| Pin 2 | RA0 — I/O port A bit 0 / analog input |
| Pin 3 | RA1 — I/O port A bit 1 / analog input |
| Pin 4 | RB0 — I/O port B bit 0 / programming PGED1 |
| Pin 5 | RB1 — I/O port B bit 1 / programming PGEC1 |
| Pin 6 | RB2 — I/O port B bit 2 |
| Pin 7 | RB3 — I/O port B bit 3 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | VDD — Positive supply voltage 3.3 V |
| Pin 10 | RB4 — I/O port B bit 4 |
| Pin 11 | RB5 — I/O port B bit 5 |
| Pin 12 | RB6 — I/O port B bit 6 |
| Pin 13 | RB7 — I/O port B bit 7 |
| Pin 14 | RC0 — I/O port C bit 0 |
| Pin 15 | RC1 — I/O port C bit 1 |
| Pin 16 | RC2 — I/O port C bit 2 |
| Pin 17 | RC3 — I/O port C bit 3 |
| Pin 18 | RC4 — I/O port C bit 4 |
| Pin 19 | RC5 — I/O port C bit 5 |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDD — Positive supply voltage 3.3 V |
| Pin 22 | RA2 — I/O port A bit 2 / analog input |
| Pin 23 | RA3 — I/O port A bit 3 / analog input |
| Pin 24 | RA4 — I/O port A bit 4 / analog input |
| Pin 25 | RA5 — I/O port A bit 5 / analog input |
| Pin 26 | RA6 — I/O port A bit 6 / analog input |
| Pin 27 | RA7 — I/O port A bit 7 / analog input |
| Pin 28 | OSC1 — Crystal oscillator input |
Typical Applications
PIC24FJ16MC102-I/SS is suitable for 6 applications: BLDC Motor Controller, Sensorless Fan Control, Small Appliance Motor Drive, LED Lighting Drivers with Dimming, Battery-Powered Power Tools, Low-Power IoT Sensor Hub.
BLDC Motor Controller
The PIC24FJ16MC102-I/SS drives small three-phase BLDC and PMSM motors at 16 MIPS with dedicated MCPWM outputs and a 6-channel 10-bit ADC for current/voltage feedback. According to Microchip AN1078, the 32-bit timer provides the resolution needed for 20 kHz PWM with center-aligned switching, while the 16 KB Flash accommodates sensorless observer code plus UART command handling. The 21 I/O count allows simultaneous driving of three half-bridges, hall/encoder inputs, and a serial command link within a single 28-SSOP footprint.
Recommended
Sensorless Fan Control
The PIC24FJ16MC102-I/SS suits sensorless fan controllers for 12 V brushless DC fans, using back-EMF sensing on a single ADC channel and a single PWM output to drive the bridge. According to Microchip DS30009997E, the 16 MIPS core runs a sliding-mode observer for back-EMF at up to 3 krpm without missing interrupts, and the 1 KB RAM is sufficient for observer state variables and speed-filtering coefficients. The 28-SSOP package drops directly onto a 5 mm x 10 mm PCB typical of compact fan hubs.
Recommended
Small Appliance Motor Drive
The PIC24FJ16MC102-I/SS is widely deployed in small kitchen and personal-care appliances - pumps, mixers, hair dryers, hand blenders - where UL 60730 Class B safety support is required. The 16-bit core's deterministic interrupt latency ensures the firmware can service current limits within a few microseconds, and Microchip Class B libraries provide self-test routines for Flash and RAM at startup. Per DS30009997E, the 28-SSOP industrial-grade part supports -40C to +85C ambient conditions typical of appliance enclosures.
Recommended
LED Lighting Drivers with Dimming
The PIC24FJ16MC102-I/SS drives constant-current LED strings with smooth PWM dimming down to 0.1 percent, using its MCPWM and 32-bit timer to generate 16-bit-resolution PWM at 1 kHz refresh. According to Microchip application notes, the ADC monitors LED current across a sense resistor and adjusts duty cycle via a closed-loop PI controller, all within 28-SSOP without external DSP. The 3.3 V supply is compatible with industry-standard LED driver front ends.
Recommended
Battery-Powered Power Tools
The PIC24FJ16MC102-I/SS controls BLDC motors in 18 V cordless drills, drivers, and saws where compact PCB size and ruggedized operation are required. The 28-SSOP package survives wave-solder reflow profiles and provides stable operation from -40C to +85C. The peripheral pin select (PPS) lets designers route UART, PWM, and ADC to any I/O, reducing PCB layer count - critical in the small form factors of power tools - while Microchip AN1078 supports sensorless starting and low-speed torque control.
Recommended
Low-Power IoT Sensor Hub
The PIC24FJ16MC102-I/SS serves as a low-cost sensor hub with CTMU support for touch/proximity buttons and time-of-flight measurement in smart-home and industrial IoT nodes. According to Microchip DS30009997E, the 16 MIPS core wakes from sleep on ADC threshold crossings or CTMU charge completion, drawing under 1 microamp in deep sleep. The 6 ADC channels support simultaneous temperature, light, and battery-voltage sensing, while UART/SPI/I2C links connect to external radios.
Recommended
Recommended Products Summary
Engineering reference data for PIC24FJ16MC102-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC24FJ16MC101-I/SS | PIC24FJ16MC102T-I/SS | PIC24FJ32MC102-I/SS | PIC24FJ16MC101-I/SO |
|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SOIC - wider body |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 16 KB | 8 KB | 16 KB | 32 KB | 8 KB |
| RAM | 1 KB | 1 KB | 1 KB | 2 KB | 1 KB |
| Maximum CPU Speed | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS | 32 MHz / 16 MIPS |
| I/O Pins | 21 | 21 | 21 | 21 | 21 |
| ADC | 6 x 10-bit | 6 x 10-bit | 6 x 10-bit | 6 x 10-bit | 6 x 10-bit |
| 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 |
| Motor Control PWM | Yes (MCPWM) | Yes (MCPWM) | Yes (MCPWM) | Yes (MCPWM) | Yes (MCPWM) |
Key Differentiators
- Lowest-cost 16-bit MCU with dedicated motor-control PWM (vs PIC24FJ16KA101-I/SS)
- 32-bit timer for high-resolution PWM (vs PIC24FJ16GA002-I/SS)
- 28-SSOP package saves 30 percent board area vs 28-SOIC (vs PIC24FJ16MC102-I/SO)
Design Notes
Estimated: Place a 100 nF decoupling capacitor within 3 mm of each VDD/VSS pair (pins 9/8 and 21/20), plus a single 10 uF bulk capacitor at the supply entry. The 28-SSOP package has two VDD/VSS pairs to reduce supply noise across the analog and digital sections. Per Microchip DS30009997E, the analog supply (AVDD if bonded out, here shared with VDD) must be filtered with a ferrite bead when the ADC is sampling during switching events, otherwise 10-bit ADC accuracy may degrade to 8-bit equivalent.
Route the ICSP signals PGEC1/PGED1 (RB1/RB0) to a 2x3 pin header or edge connector with traces under 50 mm and no series resistors for clean in-circuit programming. According to Microchip DS30009997E, excessive trace capacitance on PGEDx/PGECx can cause programming failures with low-cost debug adapters. Keep switching signals (MCPWM outputs) at least 5 mm away from the analog ADC inputs to avoid capacitive coupling during current sensing.
The PIC24FJ16MC102-I/SS does not have an internal 5 V regulator - operation below 3.0 V is not guaranteed. A common pitfall is powering from the same rail as the gate driver or comparator, which may dip during motor lock events; use a dedicated LDO with adequate headroom. Also remember that the 32.768 kHz secondary oscillator requires a specific low-frequency crystal; substituting a 1 MHz crystal on SOSC pins will cause the RTCC to drift by orders of magnitude.
Per Microchip datasheet DS30009997E, selected digital I/O pins are 5 V tolerant and can accept input voltages above VDD up to 5.5 V, but output drive is limited to 3.3 V levels. When interfacing to 5 V peripherals like legacy LCDs or sensors, use a level translator or rely on the 5 V tolerant input specification. Maintain series impedance of 50 ohms or less on high-speed SPI traces to PGECx/PGEDx-adjacent pins if running at 10 MHz.
Compliance Information
Industrial temperature grade -40C to +85C. Class B safety support documentation available from Microchip. Not AEC-Q100 qualified - choose dsPIC33 variants for automotive motor control.
