DSPIC33FJ32MC102-I/SS - 16-bit DSC 32KB Flash 16 MIPS | Microchip
MPN: DSPIC33FJ32MC102-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.9 | $39.00 |
| 100 | $3.4 | $340.00 |
| 500 | $3.05 | $1,525.00 |
| 1,000 | $2.85 | $2,850.00 |
DSPIC33FJ32MC102-I/SS Overview
A digital signal controller combines the peripheral set and ease of use of a microcontroller with the computational throughput of a DSP core. Within the power-management hierarchy of embedded control, the DSC sits between a general-purpose MCU and a dedicated DSP processor: it executes C code and drives peripherals like a microcontroller while providing hardware multiply-accumulate, division support, and DSP instruction extensions for control-loop mathematics such as PI and Park/Clarke transforms.
Key features of this dsPIC33FJ32MC102 device include the Motor Control PWM (MCPWM) module with complementary outputs and dead-time insertion, three analog comparators, the Charge Time Measurement Unit (CTMU) for capacitive touch and time-domain measurements, Peripheral Pin Select (PPS) for flexible digital I/O mapping, and a Real-Time Clock and Calendar (RTCC). Program memory is organized as 11K x 24-bit instruction words.
The 16-bit dsPIC33F core uses a modified Harvard architecture with a 16-bit data path and 24-bit instruction words, providing deterministic single-cycle multiplication and DSP-enhanced accumulation. Clock operation reaches 32MHz (16 MIPS at 3.3V) using either the internal fast RC oscillator with PLL or an external crystal. The device integrates a 10-bit ADC, UART, SPI, and I2C communication modules, making it a complete single-chip control solution for cost-sensitive designs.
Typical applications include brushless DC (BLDC) and permanent-magnet synchronous motor drives, power factor correction converters, digital UPS and inverter control, and battery chargers - all systems where multiple synchronized PWM channels, analog comparators, and fast interrupt response are mandatory.
For design, note that the 3.3V supply requires level shifting for 5V legacy peripherals, and PPS mapping must be configured in code before any remappable peripheral can operate.
This page synthesizes distributor pricing, drop-in alternatives within the dsPIC33FJ family, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ32MC102-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 DSPIC33FJ32MC102-I/SS (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, ADC, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32MC101-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.68 / Unit
View Datasheet →DSPIC33FJ32GP202T-I/SS
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →DSPIC33FJ12MC202-I/SS
✅ Drop-In✓ In Stock
$2.62 / Unit
View Datasheet →DSPIC33FJ16GP102T-I/SS
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →DSPIC33FJ12MC201-E/SS
✅ Drop-In✓ In Stock
$3.42 / Unit
View Datasheet →DSPIC33FJ32MC102-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F modified Harvard, 24-bit instruction |
| Max CPU Speed | 32 MHz (16 MIPS) |
| Program Memory | 32 KB Flash (11K x 24-bit instructions) |
| RAM | 2 KB |
| Supply Voltage | 3.0 V to 3.6 V (3.3 V nominal) |
| Operating Temperature | -40C to +85C (industrial, I-temp) |
| Package | 28-SSOP (5.30 mm width, 0.65 mm pitch) |
| Motor Control PWM (MCPWM) | Yes, with dead-time and complementary outputs |
| Analog Comparators | 3 |
| CTMU (Charge Time Measurement Unit) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| RTCC | Yes (Real-Time Clock and Calendar) |
| ADC | 10-bit, AN0-AN5 on 28-pin package |
| Communication Interfaces | UART, SPI, I2C |
| Technology | CMOS Flash |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
DSPIC33FJ32MC102-I/SS Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low), programming voltage input |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / ADC positive reference / change notification / port B0 |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / ADC negative reference / change notification / port B1 |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select / change notification / port B2 |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / QEI index / change notification / port B3 |
| Pin 6 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / QEI channel A / capture input 7 / port B4 |
| Pin 7 | VDD — Positive supply (3.0V to 3.6V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN7/RA2 — Crystal oscillator input / external clock input |
| Pin 10 | OSC2/CLKO/RC15 — Crystal oscillator output / clock output |
| Pin 11 | RTCC/RP15/RC0 — RTCC auxiliary output / remappable peripheral pin 15 / port C0 |
| Pin 12 | RP14/RC1 — Remappable peripheral pin 14 / port C1 (UART, SPI, I2C, OC, IC functions) |
| Pin 13 | AN5/QEB/IC8/RP13/RC2 — Analog input 5 / QEI channel B / capture input 8 / remappable pin 13 / port C2 |
| Pin 14 | SOSCI/CN1/RB5 — Secondary oscillator input / change notification / port B5 |
| Pin 15 | SOSCO/T1CK/RP11/RC3 — Secondary oscillator output / Timer1 clock / remappable pin 11 / port C3 |
| Pin 16 | RP10/RC4 — Remappable peripheral pin 10 / port C4 |
| Pin 17 | RP9/RC5 — Remappable peripheral pin 9 / port C5 |
| Pin 18 | RP8/RC6 — Remappable peripheral pin 8 / port C6 |
| Pin 19 | RP7/RC7 — Remappable peripheral pin 7 / port C7 |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDD — Positive supply (3.0V to 3.6V) |
| Pin 22 | RP6/RC8 — Remappable peripheral pin 6 / port C8 |
| Pin 23 | RP5/RC9 — Remappable peripheral pin 5 / port C9 |
| Pin 24 | RP4/IC1/PMA0/RB6? - see note — Remappable peripheral pin 4 / port B functions per datasheet Table I/O |
| Pin 25 | RP3/RB7 — Remappable peripheral pin 3 / port B7 |
| Pin 26 | RP2/RB8 — Remappable peripheral pin 2 / port B8 |
| Pin 27 | RP1/RB9 — Remappable peripheral pin 1 / port B9 |
| Pin 28 | RP0/RB10 — Remappable peripheral pin 0 / port B10 |
Typical Applications
DSPIC33FJ32MC102-I/SS is suitable for 6 applications: BLDC Motor Drives, Power Factor Correction (PFC) Converters, Digital UPS and Inverter Control, Battery Chargers, Capacitive Touch Interfaces, Industrial Sensing and Data Loggers.
BLDC Motor Drives
The DSPIC33FJ32MC102-I/SS fits brushless DC motor control because its dedicated MCPWM module generates three complementary PWM pairs with programmable dead-time - typically 500ns to 2us - directly driving a three-phase MOSFET gate-driver bridge without external dead-time logic. The three on-chip analog comparators support cycle-by-cycle overcurrent shutdown independent of the CPU, protecting the power stage within microseconds. At 16 MIPS, the dsPIC33F core executes trapezoidal or sinusoidal commutation and current-loop PI control in C, while the 10-bit ADC samples phase currents synchronized to the PWM center. The 28-SSOP footprint integrates the entire controller onto a compact driver board at low cost.
Recommended
Power Factor Correction (PFC) Converters
Switched-mode PFC stages demand fast, deterministic control loops that the DSPIC33FJ32MC102-I/SS provides through its 16 MIPS core and hardware multiply-accumulate, executing average-current-mode control at switching frequencies up to roughly 100kHz. The MCPWM output drives the boost switch while the 10-bit ADC, triggered by the PWM module, samples inductor current and bus voltage precisely at consistent points in each cycle, minimizing ripple-induced distortion. The three analog comparators implement hardware overcurrent protection for inrush and short-circuit events. PPS allows routing the PWM output to any remappable pin, simplifying PCB layout of the compact 28-SSOP controller next to the power stage.
Recommended
Digital UPS and Inverter Control
Single-phase inverter and UPS control requires synchronized multi-channel PWM with dead-time, fast fault protection, and precise timing - all native capabilities of the DSPIC33FJ32MC102-I/SS. The MCPWM generates SPWM or space-vector modulated outputs for the H-bridge with hardware dead-time insertion, while the RTCC provides line-frequency-synchronized timekeeping and battery-test scheduling. The 10-bit ADC samples output voltage, battery current, and temperature under PWM-triggered acquisition, and the 16 MIPS core closes the voltage regulation loop with proportional-resonant or PI control in C. Comparator outputs can trip the PWM outputs in hardware, protecting the bridge during short circuits.
Recommended
Battery Chargers
Smart charger designs use the DSPIC33FJ32MC102-I/SS to implement CC/CV charging profiles, termination detection, and safety supervision in one 28-SSOP device. The MCPWM stage drives the buck or flyback converter at up to tens of kilohertz with hardware dead-time where a synchronous rectifier is used. The 10-bit ADC tracks charge current and pack voltage, the CTMU can measure cell impedance via time-domain excitation for health estimation, and the RTCC timestamps charge sessions and supports trickle-maintenance scheduling. The three comparators provide hardware overcurrent cutoffs, and the 16 MIPS core runs state-machine charging logic entirely in C without an external supervisor IC.
Recommended
Capacitive Touch Interfaces
The integrated Charge Time Measurement Unit makes the DSPIC33FJ32MC102-I/SS a strong fit for capacitive touch buttons and sliders embedded in appliance panels. The CTMU, driven by a precision constant-current source, charges touch pads and measures charge time; firmware compares against stored baselines to detect finger capacitance shifts in the picofarad range. Microchip's touch libraries handle debouncing, drift compensation, and multi-key scanning on the 16 MIPS core while leaving headroom for the host application. Because the CTMU is on-chip, no external touch controller is required - the 28-SSOP device replaces a separate touch IC, cutting BOM cost and board area in appliances and industrial HMI panels.
Recommended
Industrial Sensing and Data Loggers
For industrial nodes that combine local actuation with signal acquisition, the DSPIC33FJ32MC102-I/SS offers UART, SPI, and I2C for Modbus RTU, sensor interfaces, and external memory, with Peripheral Pin Select letting firmware place these functions on whichever remappable pins the PCB routing favors. The 10-bit ADC with up to six external channels in the 28-pin package digitizes 0-3.3V transducer signals, while the CTMU enables resistive and capacitive measurements such as level or proximity sensing. The RTCC maintains event timestamps through power cycles, and the 32KB Flash stores logging firmware plus configuration tables. The industrial -40C to +85C rating suits unconditioned factory environments.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32MC102-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32MC101-I/SS | DSPIC33FJ32GP202T-I/SS | DSPIC33FJ12MC202-I/SS | DSPIC33FJ16GP102T-I/SS | DSPIC33FJ12MC201-E/SS |
|---|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 32 KB (11K x 24) | 16 KB | 32 KB | 12 KB | 16 KB | 12 KB |
| RAM | 2 KB | 2 KB | 2 KB | 1 KB | 2 KB | 1 KB |
| CPU Speed | 16 MIPS (32 MHz) | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| Motor Control PWM (MCPWM) | Yes | Yes | No (output compare only) | Yes | No (output compare only) | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C |
| 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 |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Dedicated Motor Control PWM with hardware dead-time (vs DSPIC33FJ32GP202T-I/SS)
- 32KB Flash at MC-family feature parity (vs DSPIC33FJ32MC101-I/SS)
- More memory in the same footprint than the 12KB tier (vs DSPIC33FJ12MC202-I/SS)
- Trade-off: 3.3V-only supply (vs PIC18F25K40-I/SS)
Design Notes
The dsPIC33FJ32MC102-I/SS requires a single 3.0V-3.6V rail for VDD with 0.1uF ceramic decoupling at pins 7 and 21 placed within 5mm of the package, plus a 4.7uF-10uF bulk capacitor near the device. Enable the internal brown-out reset (BOR) in configuration words: the Flash programming voltage is internally generated, and a write/erase cycle during an undervoltage event can corrupt program memory. Estimated: typical operating current at 16 MIPS is on the order of 30-40mA (verify in the datasheet DC characteristics table), so a 100mA-class 3.3V LDO such as an MCP1700-family part suffices for controller-only designs.
Because Peripheral Pin Select (PPS) allows UART, SPI, I2C, and PWM outputs on any RP pin, route the board first and map peripherals to pins in firmware afterward - do not force routing to legacy PIC18 pin assignments. Keep the 10-bit ADC analog inputs (AN0-AN5, pins 2-6 and 13) away from MCPWM switching traces; place an RC anti-aliasing filter (e.g., 1k + 10nF) on current-sense inputs, and keep the analog ground path separate until the single VSS point. The SSOP-28 exposed lead pitch of 0.65mm is hand-solderable but requires a fine-tip iron and flux for rework.
Three common integration errors: (1) Forgetting to unlock PPS - remappable pin assignments require a two-instruction unlock sequence (and on write-once variants, careful init order) before any UART or PWM appears on the expected pin. (2) Assuming 5V tolerance: unlike some PIC18 parts, this F-family I/O is not 5V-tolerant; series-resistor level shifting is marginal for bidirectional buses - use a proper level translator. (3) MCPWM dead-time must be configured explicitly in the PWM time-base and dead-time control registers; relying on default reset values can cause shoot-through in the power bridge. Consult the Microchip dsPIC33/PIC24 Family Reference Manual PWM section during bring-up.
Compliance Information
RoHS compliant and lead-free per Microchip product page for the -I/SS commercial/industrial grade part. Not an automotive AEC-Q100 qualified device. REACH and conflict-minerals status not stated in provided data.
