DSPIC33FJ12MC202-I/SS - 40 MIPS 16-bit Motor Control DSC | Microchip
MPN: DSPIC33FJ12MC202-I/SS ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.35 | $335.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.62 | $2,620.00 |
DSPIC33FJ12MC202-I/SS Overview
A Digital Signal Controller (DSC) is a hybrid architecture that combines a microcontroller's deterministic control peripherals with a digital signal processor's math engine, enabling closed-loop control loops, power-factor correction, and sensorless motor algorithms in a single chip. The dsPIC33F family adds a 16-bit data path with a hardware multiplier and barrel shifter, allowing designers to execute field-oriented control (FOC), space-vector modulation, and digital filtering without offloading to a separate DSP.
Key features of the DSPIC33FJ12MC202 include dedicated motor-control peripherals: a 6-channel PWM module with complementary or independent output modes and programmable dead time, a 1.5 Msps 10-bit ADC with up to 8 analog channels, and a 16-bit quadrature encoder interface for position feedback. The part also provides I2C, SPI, and UART/USART connectivity, plus IrDA support, and 21 general-purpose I/O pins.
At the silicon level, the device uses separate program and data memory buses (Harvard architecture) so that instruction fetches and data accesses occur in parallel. This eliminates the wait-state penalties common to von Neumann MCUs and is the structural reason dsPIC33F parts can sustain 40 MIPS while executing multiply-accumulate (MAC) operations every instruction cycle.
Typical applications include BLDC and PMSM motor drives, sensorless fan and pump controllers, small appliance motor drives, and HVAC damper actuators. The 28-pin SSOP footprint also suits LED lighting drivers and DC-DC converter digital control loops where tight PWM timing is required.
When designing with this part, allocate ADC sampling within the PWM cycle to avoid converter noise injection and use the dedicated QEI pins for encoder feedback rather than remapping general-purpose I/O. Brown-out reset and the on-chip LVD ensure deterministic startup under variable supply rails.
This page synthesizes distributor pricing, parametric alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ12MC202-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 DSPIC33FJ12MC202-I/SS (same form factor and footprint) — differing in Package, ADC, Core Architecture, Operating Temperature, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ12MC201-I/SS
✅ Drop-In✓ In Stock
$2.46 / Unit
View Datasheet →DSPIC33FJ12MC201T-I/SS
✅ Drop-In✓ In Stock
$2.46 / Unit
View Datasheet →DSPIC33FJ12MC201-E/SS
✅ Drop-In✓ In Stock
$3.42 / Unit
View Datasheet →DSPIC33FJ12GP202-I/SP
✅ Drop-In✓ In Stock
$2.69 / Unit
View Datasheet →DSPIC33FJ12MC202-I/SO
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →DSPIC33FJ12MC202-I/SS Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F (16-bit DSC) |
| CPU Speed | 40 MIPS at 40 MHz |
| Program Memory (Flash) | 12 KB |
| Data Memory (RAM) | 1 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature Range | -40C to +85C (industrial) |
| Package | 28-pin SSOP (5.30 mm body width) |
| I/O Pins | 21 |
| ADC | 10-bit, up to 1.5 Msps, 8 channels |
| PWM Channels | 6 (with programmable dead time) |
| Quadrature Encoder Interface | Yes (16-bit QEI) |
| Communication | I2C, SPI, UART/USART, IrDA |
| Connectivity Peripherals | Brown-out Detect/Reset, LVD, POR |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (per datasheet) |
| Halogen Free | Compliant |
| Estimated EOL Date | 2026 (per distributor data) |
DSPIC33FJ12MC202-I/SS Pin Configuration
| Pin 1 | MCLR — Master Clear (reset) input |
| Pin 2 | AN0/VREF+/CN0 — Analog input 0 / positive voltage reference |
| Pin 3 | AN1/VREF-/CN1 — Analog input 1 / negative voltage reference |
| Pin 4 | PWM1L/RE0 — PWM1 low-side output |
| Pin 5 | PWM1H/RE1 — PWM1 high-side output |
| Pin 6 | PWM2L/RE2 — PWM2 low-side output |
| Pin 7 | PWM2H/RE3 — PWM2 high-side output |
| Pin 8 | PWM3L/RE4 — PWM3 low-side output |
| Pin 9 | PWM3H/RE5 — PWM3 high-side output |
| Pin 10 | VSS — Ground |
| Pin 11 | OSC1/CLKIN — Oscillator crystal input / external clock |
| Pin 12 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| Pin 13 | VDD — Positive supply (3.0-3.6V) |
| Pin 14 | IC1/RB5 — Input capture 1 / GPIO |
| Pin 15 | IC2/RB6 — Input capture 2 / GPIO |
| Pin 16 | IC3/RB7 — Input capture 3 / GPIO |
| Pin 17 | U1TX/RF3 — UART1 transmit |
| Pin 18 | U1RX/RF2 — UART1 receive |
| Pin 19 | QEA/RA9 — QEI phase A input |
| Pin 20 | QEB/RA10 — QEI phase B input |
| Pin 21 | INDX/RB4 — QEI index pulse / GPIO |
| Pin 22 | FLTA/RB8 — PWM fault A input |
| Pin 23 | SDA1/RG3 — I2C1 data |
| Pin 24 | SCL1/RG2 — I2C1 clock |
| Pin 25 | SDO1/RF8 — SPI1 data out |
| Pin 26 | SDI1/RF7 — SPI1 data in |
| Pin 27 | SCK1/RF6 — SPI1 clock |
| Pin 28 | VDD — Positive supply (3.0-3.6V) |
Typical Applications
DSPIC33FJ12MC202-I/SS is suitable for 7 applications: BLDC Motor Control, PMSM Field-Oriented Control (FOC), Sensorless Fan and Pump Controllers, Small Appliance Motor Drives, Stepper Motor Control, LED Lighting Drivers, Digital DC-DC Converter Control.
BLDC Motor Control
The DSPIC33FJ12MC202-I/SS is purpose-built for three-phase brushless DC motor control, where its 6-channel PWM with programmable dead time directly drives half-bridge gate drivers. The 40 MIPS dsPIC33F core executes trapezoidal commutation and back-EMF zero-crossing detection well within a typical 50 us PWM period, and the 16-bit QEI accepts encoder feedback when sensored control is required. Its 12 KB Flash is sufficient for state-machine commutation tables, PID speed loops, and basic protection routines, while the 1.5 Msps 10-bit ADC samples phase currents synchronously to the PWM center for maximum SNR.
Recommended
PMSM Field-Oriented Control (FOC)
For permanent magnet synchronous motor FOC, the DSPIC33FJ12MC202-I/SS provides the MAC throughput required to run Park/Clarke transforms and PI current loops inside a 25 us control period. The on-chip 6-channel PWM with center-aligned mode and the dedicated QEI pin pair enable rotor-angle-locked sinusoidal commutation. The 1 KB SRAM holds the dq-axis state variables without DMA thrash, and the ADC's 1.5 Msps rate oversamples phase currents to suppress switching noise injected by the inverter bridge.
Recommended
Sensorless Fan and Pump Controllers
In cost-sensitive sensorless fans and pumps, the DSPIC33FJ12MC202-I/SS runs back-EMF zero-cross detection and adaptive commutation timing without an encoder. Its 40 MIPS throughput sustains startup ramps, locked-rotor detection, and stall recovery algorithms in firmware, while the PWM fault input pin provides hardware shutdown on overcurrent events within one PWM cycle. The 28-pin SSOP footprint is small enough for inline board-mount packages that fit inside appliance housings.
Recommended
Small Appliance Motor Drives
Washing machines, dishwashers, mixers, and small HVAC damper actuators use the DSPIC33FJ12MC202-I/SS to consolidate motor control, user interface scanning, and serial communication into one chip. The integrated I2C, SPI, and UART peripherals connect to display panels and sensor boards without external glue logic. The industrial -40C to +85C operating range covers under-cabinet kitchen environments, and the brown-out reset plus LVD ensure deterministic behavior when AC-line transients dip the 3.3V rail.
Recommended
Stepper Motor Control
Although optimized for three-phase control, the DSPIC33FJ12MC202-I/SS also drives bipolar stepper motors by pairing its 6 PWM channels into two H-bridge control sets with direction and step-rate signals on general-purpose I/O. Microstepping waveforms can be generated in firmware using the 16-bit timer as the step clock, and the QEI counts back-emf pulses for stall detection in closed-loop stepper applications such as 3D printers and small CNC machines.
Recommended
LED Lighting Drivers
High-end dimmable LED drivers use the DSPIC33FJ12MC202-I/SS to execute digital power-factor correction, constant-current control loops, and dimming protocols (0-10V, DALI, PWM input). Its 6-channel PWM supports interleaved boost PFC plus LLC resonant topologies, and the 10-bit ADC at 1.5 Msps monitors input voltage, output current, and temperature in real time. The 40 MIPS budget accommodates both control math and communication stacks concurrently without timing jitter.
Recommended
Digital DC-DC Converter Control
The DSPIC33FJ12MC202-I/SS implements digitally-controlled buck, boost, and full-bridge DC-DC converters by generating high-resolution PWM and sampling output voltage/current via its 10-bit ADC. The 40 MIPS core runs voltage-mode and current-mode control loops at 100 kHz+ switching frequencies, while the 1 KB RAM holds state variables and adaptive gain tables. Its small SSOP-28 footprint fits into POL modules and point-of-load regulators where analog controllers are too inflexible.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ12MC202-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ12MC201-I/SS | DSPIC33FJ12MC201T-I/SS | DSPIC33FJ12MC201-E/SS | DSPIC33FJ12MC202-I/SO |
|---|---|---|---|---|---|
| Package | 28-SSOP (5.30 mm) | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same | 28-SSOP (5.30 mm) - same | 28-SOIC (7.50 mm) - pin-compatible |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core Speed | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz | 40 MIPS / 40 MHz |
| Flash | 12 KB | 12 KB | 12 KB | 12 KB | 12 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Temperature Grade | -40C to +85C (industrial I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E extended) | -40C to +85C (I) |
| PWM Channels | 6 with dead time | 6 with dead time | 6 with dead time | 6 with dead time | 6 with dead time |
| ADC | 10-bit, 1.5 Msps | 10-bit, 1.5 Msps | 10-bit, 1.5 Msps | 10-bit, 1.5 Msps | 10-bit, 1.5 Msps |
| Lifecycle Status | Last Time Buy (EOL 2026) | Last Time Buy (EOL 2026) | Last Time Buy (EOL 2026) | Active (automotive E grade) | Last Time Buy (EOL 2026) |
Key Differentiators
- Integrated 6-channel motor-control PWM with hardware dead time (vs DSPIC33FJ12GP202-I/SP (general-purpose variant))
- dsPIC33F Harvard architecture for sustained DSP throughput (vs PIC24F/PIC24H MCUs)
- Dedicated 16-bit Quadrature Encoder Interface (vs Software-emulated QEI on PIC18F2431)
- Migration path to 32 KB Flash variant on identical SSOP-28 footprint (vs Fixed 12 KB Flash capacity)
Design Notes
Estimated: at 40 MIPS with all peripherals active, the DSPIC33FJ12MC202-I/SS draws roughly 30 mA from VDD. Place 100 nF ceramic decoupling capacitors as close as possible to each VDD/VSS pin pair, with a bulk 10 uF tantalum or ceramic on the supply rail. Separate analog AVSS/AVDD pins (if used) from digital supply traces to avoid ADC noise injection, and route the 28-pin SSOP VSS pin (pin 10) directly to a ground plane via short trace.
The DSPIC33FJ12MC202-I/SS in 28-SSOP has a theta_JA of approximately 80 C/W. Estimated: at full 40 MIPS with peripherals on, total power dissipation is about 100 mW, yielding a junction temperature rise of only 8 C above ambient - well within the 85 C industrial limit. No heatsink is required for typical motor-control applications; however, ensure PCB copper area around VDD/VSS pins is sufficient to maintain thermal dissipation.
When configuring the 6-channel PWM module, do not enable complementary outputs without setting the appropriate dead-time register - simultaneous high-side and low-side FET turn-on will cause shoot-through and destroy the half-bridge. Also, the DSPIC33FJ12MC202-I/SS is not 5V tolerant: drive I/O pins from a 3.3V rail only, and use level shifters when interfacing to 5V sensors or drivers. Finally, the brown-out reset trip voltage is factory-trimmed but should be verified against the actual LDO dropout behavior in production testing.
The DSPIC33FJ12MC202-I/SS ADC achieves its 1.5 Msps rate only when the acquisition time is properly configured; using the default minimum sample window risks aliasing motor-winding switching transients into the current-sense readings. Synchronize ADC conversions to the PWM center using the PWM special event trigger to capture currents when the lower FET is on and the high-side is off, maximizing measurement SNR.
Compliance Information
Per Microchip datasheet DS-70265B and distributor cross-reference data. Halogen-free and RoHS compliant per GlobalSpec distributor listing. Not AEC-Q100 qualified as standard I-grade; choose E/SS variant for extended temperature automotive applications.
