DSPIC33FJ16MC102-I/SO - 16-Bit 16MIPS Motor Control DSC | Microchip
MPN: DSPIC33FJ16MC102-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.31 | $6.31 |
| 10 | $6.05 | $60.50 |
| 100 | $5.68 | $568.00 |
| 500 | $5.42 | $2,710.00 |
| 1,000 | $5.1 | $5,100.00 |
DSPIC33FJ16MC102-I/SO Overview
A digital signal controller combines the computational throughput of a DSP engine with the peripheral integration, interrupt architecture, and ease of use of a microcontroller. In the power-management and embedded-control hierarchy, the DSC sits between general-purpose MCUs and standalone DSPs, making it the default choice for closed-loop power electronics where a control loop must execute deterministic control algorithms such as field-oriented control (FOC) or BLDC commutation within tight cycle budgets.
Key features of the dsPIC33FJ16MC102 family include multiple high-speed motor control PWM (MCPWM) outputs with complementary modes, dead-time insertion, and fault protection; a high-speed 10-bit ADC capable of simultaneous sampling for current and voltage feedback; up to four high-speed analog comparators with direct PWM shutdown connection for cycle-by-cycle current limiting; and the Charge Time Measurement Unit (CTMU) for capacitive touch and precise timing measurements. Peripheral Pin Select (PPS) allows digital peripherals to be remapped to many I/O pins, dramatically improving PCB layout flexibility in low-pin-count designs.
Architecturally, the device executes a modified Harvard 16-bit instruction set with two 40-bit accumulators, single-cycle MAC, and hardware division support, enabling efficient execution of PID and transform-based control algorithms. Flash program memory is rated for 10,000 erase/write cycles minimum, and an on-chip LDO regulator allows single-supply 3V to 3.6V operation.
Typical applications include brushed and brushless DC motor control, permanent-magnet synchronous motor (PMSM/FOC) drives, digital power supplies (buck/boost/LLC), uninterruptible power supplies, electronic lighting ballasts, and power-factor-correction converters.
Design consideration: the device operates from 3.0V to 3.6V only - it is not a 5V part - so level shifting is required to interface with 5V logic, and all VDD/VSS pairs must be decoupled with 0.1uF ceramics placed within 3 mm of the pins.
This page synthesizes verified distributor pricing, drop-in alternatives from the same Microchip family, practical design notes, and intent-targeted FAQs not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ16MC102-I/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 DSPIC33FJ16MC102-I/SO (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, Program Memory (Flash), ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ12MC202-I/SO
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →DSPIC33FJ12MC201-I/SS
✅ Drop-In✓ In Stock
$2.46 / Unit
View Datasheet →DSPIC33FJ32MC102-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.05 / Unit
View Datasheet →DSPIC33FJ16MC102-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.11 / Unit
View Datasheet →DSPIC33FJ16GP102-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.18 / Unit
View Datasheet →DSPIC33FJ32MC202-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ16MC102-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F DSC (modified Harvard) |
| Maximum CPU Speed | 40 MIPS (40 MHz instruction) |
| Flash Program Memory | 16 KB |
| SRAM Data Memory | 1 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 28-SOIC (0.3 in widebody) |
| PWM Channels | Motor Control PWM (MCPWM), complementary outputs with dead time |
| ADC Resolution / Channels | 10-bit, up to 9 external channels, 1.1 Msps class |
| Comparators | Up to 4 high-speed comparators with PWM fault direct connection |
| CTMU | Yes - Charge Time Measurement Unit |
| Peripheral Pin Select (PPS) | Yes - remappable digital I/O |
| Timers | 3 x 16-bit timers (Timer1/2/3, 32-bit capable pairing) |
| Communication Interfaces | UART, SPI, I2C (remappable via PPS) |
| External Interrupts | 3 (two remappable) |
| I/O Sink/Source Current | 10 mA / 6 mA pin-specific; up to 16 mA / 12 mA non-standard VOH |
| Mounting Type | Surface Mount |
| RoHS Status | Lead-free, RoHS compliant |
DSPIC33FJ16MC102-I/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low), programming voltage input |
| Pin 2 | AN0/VREF+/CN2B/RB0 — Analog input 0 / ADC positive reference / change notification / port B bit 0 |
| Pin 3 | AN1/VREF-/CN3B/RB1 — Analog input 1 / ADC negative reference / change notification / port B bit 1 |
| Pin 4 | AN2/PGD/CN4B/RB2 — Analog input 2 / ICSP programming data / port B bit 2 |
| Pin 5 | AN3/PGC/CN5B/RB3 — Analog input 3 / ICSP programming clock / port B bit 3 |
| Pin 6 | AN4/C1IN-/CN6B/RB4 — Analog input 4 / comparator 1 inverting input / port B bit 4 |
| Pin 7 | AN5/C1IN+/CN7B/RB5 — Analog input 5 / comparator 1 non-inverting input / port B bit 5 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN12/RA2 — Crystal oscillator input / external clock input / port A bit 2 |
| Pin 10 | OSC2/CLKO/CN13/RA3 — Crystal oscillator output / clock output / port A bit 3 |
| Pin 11 | VDD — Positive supply (3.0 V to 3.6 V) |
| Pin 12 | RP0/FLTA/INT0/CN22/RC1 — Remappable peripheral pin 0 / PWM fault input / external interrupt 0 / port C bit 1 |
| Pin 13 | RP1/CN23/RC2 — Remappable peripheral pin 1 (UART/SPI/PWM assignable) / port C bit 2 |
| Pin 14 | RP2/CTED1/CN24/RC3 — Remappable peripheral pin 2 / CTMU edge input 1 / port C bit 3 |
| Pin 15 | RP3/CTED2/CN25/RC4 — Remappable peripheral pin 3 / CTMU edge input 2 / port C bit 4 |
| Pin 16 | RP4/CN1/RC5 — Remappable peripheral pin 4 / change notification / port C bit 5 |
| Pin 17 | RP5/CN27/RC6 — Remappable peripheral pin 5 / change notification / port C bit 6 |
| Pin 18 | RP6/CN28/RC7 — Remappable peripheral pin 6 / change notification / port C bit 7 |
| Pin 19 | RP7/CN29/RG0 — Remappable peripheral pin 7 / change notification / port G bit 0 |
| Pin 20 | RP8/CN30/RG1 — Remappable peripheral pin 8 / change notification / port G bit 1 |
| Pin 21 | RP9/CN31/RG2 — Remappable peripheral pin 9 / change notification / port G bit 2 |
| Pin 22 | RP10/CN16/RG3 — Remappable peripheral pin 10 / change notification / port G bit 3 |
| Pin 23 | T2CK/CN18/RG6 — Timer 2 external clock input / change notification / port G bit 6 |
| Pin 24 | T3CK/CN19/RG7 — Timer 3 external clock input / change notification / port G bit 7 |
| Pin 25 | RP13/RF3 — Remappable peripheral pin 13 / port F bit 3 |
| Pin 26 | RP12/RF2 — Remappable peripheral pin 12 / port F bit 2 |
| Pin 27 | RP11/RF13 — Remappable peripheral pin 11 / port F bit 13 |
| Pin 28 | AVDD/AVSS and VCAP/VDD — Analog supply / internal regulator capacitor pin - see datasheet power-pin assignment for exact 28-SOIC allocation |
Typical Applications
DSPIC33FJ16MC102-I/SO is suitable for 6 applications: Brushless DC (BLDC) Motor Control, Digital Power Supplies (Buck/Boost/LLC), PMSM / Field-Oriented Control Drives, Uninterruptible Power Supplies (UPS), Electronic Lighting Ballasts and LED Drivers, Power Factor Correction (PFC) Converters.
Brushless DC (BLDC) Motor Control
The DSPIC33FJ16MC102-I/SO is purpose-built for BLDC control: its Motor Control PWM (MCPWM) module generates complementary six-step outputs with hardware dead-time insertion, while the high-speed comparators connect directly to PWM shutdown for cycle-by-cycle overcurrent protection without CPU intervention. The 10-bit ADC samples the DC bus and phase currents fast enough for sensorless back-EMF commutation at typical fan, pump, and tool motor speeds. Firmware executes the commutation state machine in the 16 MIPS DSP core with headroom for PID speed loops. A typical design gates the six PWM outputs through drivers such as the IR2101 to a three-phase bridge; the fault-priority hardware ensures the bridge is tripped within a single PWM cycle on overcurrent, a level of protection a general-purpose MCU would need software latency to replicate.
Recommended
Digital Power Supplies (Buck/Boost/LLC)
In digitally controlled power converters, the MC102's 16 MIPS core and fast ADC close current- and voltage-mode loops at switching frequencies up to a few hundred kHz. The Peripheral Pin Select lets the PWM, UART, and SPI land on layout-optimal pins, simplifying the tight gate-drive routing demanded by LLC and synchronous buck topologies. High-speed comparators implement hardware peak-current limiting; the CTMU adds precision timing for ZVS window measurement. Control compensation runs as a 2P2Z or PID loop in the DSP engine with single-cycle MAC. Compared to an analog controller, the dsPIC33FJ16MC102 adds nonlinearity handling, soft-start shaping, and telemetry via UART - the trade-off is that firmware must be validated against all fault conditions, so allocate code space carefully within the 16 KB Flash budget.
Recommended
PMSM / Field-Oriented Control Drives
For permanent-magnet synchronous motors, the MC102 executes sensorless or encoder-based FOC within its 16 MIPS budget: Clarke and Park transforms use the hardware DSP MAC and 40-bit accumulators, the ADC samples two phase currents and the bus voltage, and the MCPWM generates center-aligned SVPWM with programmable dead time. The 1 KB SRAM constrains the observer complexity - a sliding-mode or reduced-order observer fits, but full model-reference estimators do not, making the 32 KB/2 KB DSPIC33FJ32MC202-I/SO a sensible upgrade path. Typical uses are servo-class small drives, e-bike controllers, and HVAC blowers where efficiency and torque ripple matter. The direct comparator-to-PWM fault path gives hardware-level overcurrent shutdown, which is essential when running phase currents of several amperes through an external three-phase inverter stage.
Recommended
Uninterruptible Power Supplies (UPS)
Line-interactive and offline UPS control benefits from the MC102's combination of ADC-synchronized PWM and DSP math: the inverter output is sampled by the 10-bit ADC, a PID-plus-harmonic-compensation loop shapes the sine reference, and the MCPWM drives the H-bridge through gate drivers. Hardware comparators protect against transformer saturation and bridge overcurrent with one-cycle response. The CTMU and timers coordinate zero-crossing detection and transfer-relay timing. Peripheral Pin Select allows UART telemetry and I2C battery-management access on convenient pins. Within the 16 KB Flash budget, a compact sine inverter with battery charging state machine fits comfortably. For designs needing richer waveform generation or Ethernet telemetry, Microchip's larger dsPIC33FJ MC/GS members share the same development toolchain, protecting firmware investment across the family.
Recommended
Electronic Lighting Ballasts and LED Drivers
High-intensity discharge and fluorescent ballast designs use the MC102's PWM versatility to drive half-bridge resonant stages, sweep ignition frequency, and regulate lamp current via ADC feedback, while the analog comparators enforce fast lamp-current limits. For high-power LED drivers, the same hardware implements constant-current hysteretic or average-mode control with PWM dimming down to low duty cycles for smooth dimming curves. The CTMU can measure sensor inputs such as presence or ambient-light detection for smart lighting. The 3.0V-3.6V supply matches opto-isolated feedback circuits that run from 3.3V logic. Because 16 KB Flash accommodates a complete ballast application including ignition sequencing, fault logging, and DALI-class communication on the remappable UART/I2C pins, the MC102 covers both the power stage and the lighting control protocol in one low-cost 28-pin SOIC.
Recommended
Power Factor Correction (PFC) Converters
Average-current-mode boost PFC is a classic fit for the MC102: the ADC samples input voltage, inductor current, and output bus; the DSP core computes the current command as a product of the rectified-line shape and voltage-loop error; and the MCPWM generates the boost duty with cycle-by-cycle comparator current limiting as a hardware backstop. Achievable switching frequencies with a 16 MIPS core cover the common 50-150 kHz PFC range with adequate loop resolution. Peripheral Pin Select positions the PWM and feedback inputs for a clean, short analog routing loop - critical because PFC layouts carry high di/dt. Compliance with line-current harmonic requirements (e.g., IEC 61000-3-2 class designs) is implemented in firmware, giving designers freedom to tune THD versus transient response - a flexibility fixed-frequency analog PFC controllers cannot match.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16MC102-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ12MC202-I/SO | DSPIC33FJ32MC102-I/SO | DSPIC33FJ16MC102-E/SO | DSPIC33FJ16GP102-I/SO | DSPIC33FJ12MC201-I/SS | DSPIC33FJ32MC202-I/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC (0.3 in widebody) | 28-SOIC - same footprint | 28-SOIC - same footprint | 28-SOIC - same footprint | 28-SOIC - same footprint | 28-SSOP (narrower body - not same land pattern) | 28-SOIC - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 16 KB | 12 KB | 32 KB | 16 KB | 16 KB | 12 KB | 32 KB |
| SRAM | 1 KB | 1 KB | 2 KB | 1 KB | 2 KB | 1 KB | 2 KB |
| CPU Performance | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| Peripheral Family Type | MC (motor control: MCPWM + comparators) | MC (motor control) | MC (motor control) | MC (motor control) | GP (general purpose - no MCPWM) | MC (motor control) | MC (motor control) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C |
| Supply 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 | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
Key Differentiators
- Dedicated motor-control PWM with hardware fault path (vs DSPIC33FJ16GP102-I/SO)
- Drop-in memory upgrade path without PCB change (vs DSPIC33FJ32MC202-I/SO)
- Extended-temperature availability in identical footprint (vs DSPIC33FJ16MC102-E/SO)
Design Notes
Place a 0.1uF ceramic decoupling capacitor at each VDD/VSS pair within 3 mm of the 28-SOIC pins, plus one 2.2uF-10uF bulk capacitor near the device. The dsPIC33FJ's internal regulator requires its dedicated VCAP capacitor per the datasheet value - do not substitute a different value or dielectric. The SOIC's longer, inductive leads compared to QFN packages make this even more important when PWM edges drive external gate drivers; keep the ground return of the gate driver tied close to the MCU VSS to avoid ground bounce corrupting ADC readings.
Use Peripheral Pin Select (PPS) deliberately: assign PWM outputs and UART/SPI to pins physically separated from the ADC feedback inputs (AN0-AN5, pins 2-7). Fast MCPWM edges couple capacitively into adjacent analog traces on a two-layer board. Route the ADC input traces as short as possible, guard them with ground, and add an RC antialiasing filter (e.g., 1 k ohm + 1 nF, Estimated values - verify with your sampling rate). Configure unused analog-capable pins as digital outputs low or as analog inputs to minimize leakage and noise injection.
Three frequent mistakes with this part: (1) assuming 5V tolerance - the I/O is 3.3V only; 5V signals require series resistance and clamp strategy per the datasheet's 5V-tolerant pin list, or level shifting. (2) MCLR weak pull-up - the internal pull-up is too weak for noisy motor-drive environments; use an external 10 k ohm pull-up and 0.1 uF to ground (Estimated typical values). (3) ICD programming conflicts - PPS-mapped peripherals on RP0-RP3 can block ICSP if programming pins are reassigned; reserve the PGD/PGC pins (RB2/RB3) during development or provide a programming header that disconnects the peripheral load.
Estimated: the 28-SOIC junction-to-ambient resistance is roughly 70-100 C/W depending on copper area (verify the exact value in the package thermal chapter of DS70000652F). With typical internal dissipation of 30-60 mV x active current (a few tens of mA at 16 MIPS), self-heating is usually under 5C, so thermal design is rarely limiting for the MCU itself. The thermal risk in motor drives comes from nearby power devices - keep the MCU at least 15 mm from switching MOSFETs or provide a thermal slot in the ground plane.
Compliance Information
Distributor listings (DigiKey, Mouser, LCSC) identify the /I/SO part as lead-free and RoHS compliant. No AEC-Q100 qualification is claimed for this ordering code in the provided data; confirm formal REACH and conflict-minerals declarations with Microchip compliance documentation.
