DSPIC33FJ12MC202-I/SO - 16-bit DSC, 12KB Flash, 40 MIPS Motor Control MCU | Microchip
MPN: DSPIC33FJ12MC202-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.1 | $6.10 |
| 10 | $5.55 | $55.50 |
| 100 | $4.85 | $485.00 |
| 500 | $4.3 | $2,150.00 |
| 1,000 | $3.85 | $3,850.00 |
DSPIC33FJ12MC202-I/SO Overview
What is a Digital Signal Controller (DSC)? A DSC is a hybrid MCU/DSP family that retains the deterministic interrupt model of a microcontroller while adding single-cycle MAC and saturating arithmetic, allowing closed-loop control loops and audio/power signal processing to run on a single device instead of an MCU+DSP pair. The dsPIC33FJ12MC202 sits inside Microchip's motor-control subgroup of the dsPIC33F family; in the wider taxonomy it belongs to MCU -> 16-bit MCU -> DSC -> motor-control DSC -> power management & motion control semiconductor.
Key features include 40 MHz operation (10 MIPS at 3.3 V), 21 general-purpose I/O with 5 V-tolerant inputs, JTAG/ICSP debug, two UART, one SPI, one I2C, a 6-channel motor-control PWM, a 200 ksps 10-bit ADC (up to 9 channels on this 28-pin variant), and peripheral pin select for flexible signal routing. The 28-pin SOIC footprint is pin-compatible with the PIC24 and dsPIC33F GP202 families, easing PCB reuse across control SKUs.
Architecturally, the device uses a Harvard bus with separate program (Flash) and data (SRAM) paths, a 16 × 16-bit working register array, and DSP instructions that execute in a single oscillator cycle. The internal 7.3728 MHz FRC oscillator with 64x PLL provides 40 MIPS at ±1 % accuracy over voltage and temperature, allowing the MCU to run without an external crystal and still meet Class-B motor-control timing.
Typical applications include brushed DC motor drives, BLDC/PMSM sensored and sensor-less control, low-powerfield-oriented-control (FOC) fans and pumps,small appliance drives, and digital lighting ballasts. The 40 MIPS headroom + dedicated PWM/ADC hardware pair is sized for 6-step trapezoidal commutation up to ~30 kHz electrical frequency.
When designing with this device, populate the MCLR pull-up, place AVSS/AGND and VSS/VSS separation on a star ground, and use the peripheral pin-select feature if your PCB swaps UART lines for SPI debug access.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ12MC202-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 DSPIC33FJ12MC202-I/SO (same form factor and footprint) — differing in ADC, Operating Temperature, Package, PWM Channels, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ12MC201-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ12GP202-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ12GP201-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128MC202-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.05 / Unit
View Datasheet →DSPIC33EP128MC202-I/SO
✅ Drop-In✓ In Stock
$3.92 / Unit
View Datasheet →DSPIC33FJ12MC202-I/SO Maximum Ratings & Electrical Characteristics
| Product Type | Digital Signal Controller (DSC) |
| Family | dsPIC33F |
| Core Size | 16-bit |
| Core Architecture | dsPIC33F (Harvard, MCU + DSP extensions) |
| Program Memory (Flash) | 12 KB |
| Data RAM | 1 KB |
| Instruction Throughput | 40 MIPS |
| Max CPU Speed | 40 MHz |
| Supply Voltage | 3.0 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C (Industrial) |
| I/O Pins | 21 |
| ADC | 10-bit, up to 9 channels, 200 ksps (per family datasheet) |
| PWM Channels | 6 channels with complementary outputs and programmable dead time |
| UART | 2 |
| SPI | 1 |
| I2C | 1 |
| Timers (16-bit) | 3 + 1 (Timer1 16-bit, plus motor-control timer and 32-bit timer pair) |
| Package | SOIC-28 (wide body, 7.50 mm / 300 mil) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Debug Interface | JTAG / ICSP |
DSPIC33FJ12MC202-I/SO Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear / ICSP programming voltage input; pull up to VDD |
| Pin 2 | SOSCI — Secondary oscillator crystal input (32.768 kHz) for Timer1 |
| Pin 3 | SOSCO — Secondary oscillator crystal output |
| Pin 4 | OSC1/RC1 — Primary crystal / external clock input |
| Pin 5 | OSC2/RC2 — Primary oscillator output |
| Pin 6 | PGEC1 — ICSP clock (programming/debug) |
| Pin 7 | PGED1 — ICSP data (programming/debug) |
| Pin 8 | VSS — Digital ground reference |
| Pin 9 | TDI — JTAG Test Data In |
| Pin 10 | PWM1L — PWM channel 1 low-side output |
| Pin 11 | PWM1H — PWM channel 1 high-side output |
| Pin 12 | PWM2L — PWM channel 2 low-side output |
| Pin 13 | PWM2H — PWM channel 2 high-side output |
| Pin 14 | AN0/RA0 — Analog input / GPIO |
| Pin 15 | AN1/RA1 — Analog input / GPIO |
| Pin 16 | VSS — Digital ground reference |
| Pin 17 | VDD — Digital supply (3.0-3.6 V) |
| Pin 18 | RB0 — GPIO port B bit 0 |
| Pin 19 | RB1 — GPIO port B bit 1 |
| Pin 20 | RB2 — GPIO port B bit 2 |
| Pin 21 | RB3 — GPIO port B bit 3 |
| Pin 22 | RB4 — GPIO port B bit 4 |
| Pin 23 | RB5 — GPIO port B bit 5 |
| Pin 24 | RB6 — GPIO port B bit 6 |
| Pin 25 | RB7 — GPIO port B bit 7 |
| Pin 26 | TDO — JTAG Test Data Out |
| Pin 27 | AVSS — Analog ground |
| Pin 28 | AVDD — Analog supply (3.0-3.6 V) |
Typical Applications
DSPIC33FJ12MC202-I/SO is suitable for 6 applications: Brushed DC Motor Drive, BLDC / PMSM Sensored Control, Small Appliance Fan / Pump Controller, Digital Lighting Ballasts, Servo / Hobby RC Systems, Industrial Sensor Conditioning.
Brushed DC Motor Drive
Provides low-cost brushed DC motor control from a single 3.3 V rail. The DSPIC33FJ12MC202-I/SO's 40 MIPS core and dedicated PWM with programmable dead time drive an H-bridge with up to four quadrant operation. Why this part: the 6-channel motor-control PWM and 200 ksps ADC enable current-mode armature regulation at 20 kHz. Trade-off: 1 KB SRAM limits multi-protocol STO safety firmware.
Recommended
BLDC / PMSM Sensored Control
Targets six-step trapezoidal commutation or low-speed field-oriented control (FOC) of brushless DC motors. The DSPIC33FJ12MC202-I/SO's hardware motor-control PWM with programmable dead-time insertion reduces software overhead by ~20 % vs a GP-timer-only approach. The 10-bit ADC has just enough resolution for Hall-effect current sensing in 12-24 V battery-powered tools and appliances.
Recommended
Small Appliance Fan / Pump Controller
Replaces legacy 8-bit controllers in 5 V / 12 V fan and pump boards. The DSPIC33FJ12MC202-I/SO's low-power sleep mode (≤1 µA standby) and fast wake-up on PWM/timer make it suitable for battery-powered quiet-cooling fans. The on-chip DSP extensions accelerate Clarke/Park transforms for rudimentary sensorless FOC, keeping the part count low versus an MCU+DSP pair.
Recommended
Digital Lighting Ballasts
Drives resonant LLC converters and electronic ballasts requiring precise dimming curves and safety shutoff. The DSPIC33FJ12MC202-I/SO runs CFL/LED-CCL ballast firmware libraries from Microchip with built-in constant-current control loops on the high-resolution PWM. The wide 28-SOIC footprint provides enough thermal headroom for indoor-rated lighting controllers.
Recommended
Servo / Hobby RC Systems
Targets hobby servos and small drones requiring fast PWM feedback at 50 Hz to 400 Hz refresh rates. The DSPIC33FJ12MC202-I/SO's 16-bit PWM and 4-cycle MIPS ratio support simultaneous position-velocity-torque loops on up to four servos. JTAG debug enables in-the-field tuning via MPLAB IPE.
Recommended
Industrial Sensor Conditioning
Conditions analog sensor inputs (load cells, strain gauges, RTDs) with MCU-side digital filtering thanks to the DSP hardware MAC instructions. The DSPIC33FJ12MC202-I/SO's 10-bit ADC is well suited to industrial signals in the 0-3.3 V range, and the 16-bit timer infrastructure gives accurate PWM output for 4-20 mA loop actuators via summing op-amps.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ12MC202-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ12MC201-I/SO | DSPIC33FJ12GP202-I/SO | DSPIC33FJ12GP201-I/SO | DSPIC33FJ128MC202-I/SO | DSPIC33EP128MC202-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-28 | SOIC-28 | SOIC-28 | SOIC-28 | SOIC-28 | SOIC-28 |
| Flash Memory | 12 KB | 6 KB | 12 KB | 6 KB | 128 KB | 128 KB |
| MIPS / Throughput | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 60 MIPS |
| PWM Type | 6-channel Motor-Control PWM (complementary, dead-time) | 6-channel Motor-Control PWM | General-purpose 16-bit PWM | General-purpose 16-bit PWM | 6-channel Motor-Control PWM | 6-channel Motor-Control PWM (dsPIC33E) |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| 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 |
| Indicative 1-piece Price | ~$6.10 | ~$5.50 | ~$5.40 | ~$4.90 | ~$7.50 | ~$6.80 |
Key Differentiators
- Dedicated 6-channel motor-control PWM on the same Flash die as the -201 (vs DSPIC33FJ12GP202-I/SO)
- 12 KB Flash double the -201 die storage for richer firmware (vs DSPIC33FJ12MC201-I/SO)
- Lower cost than the 128 KB MC202 sibling (vs DSPIC33FJ128MC202-I/SO)
Design Notes
Power the DSPIC33FJ12MC202-I/SO from a clean 3.3 V rail: place a 10 µF bulk cap plus 100 nF + 10 nF decoupling pair within 3 mm of VDD/AVDD pins and tie both analog and digital returns to a single star ground. Estimated: at 40 MIPS with active ADC, the MCU core draws ~40 mA; budget up to 60 mA peak for short ADC bursts, so choose a TPS54302-class 3 A buck instead of a 150 mA LDO.
Place the 32.768 kHz SOSCO/SOSCI crystal within 5 mm of pins 2-3 with a guard ring tied to VSS. Keep JTAG/ICSP traces (PGEC1/PGED1 on pins 6-7) short - pull-ups of 100 kΩ on MCLR to VDD are mandatory. On 4-layer boards, dedicate one inner layer to a continuous VDD island; AVSS-to-VSS pads should be bridged with a single 0 Ω link near the MCU. Following these routing practices typically cuts EMI peaks on the PWM lines by 6-8 dB.
Estimated: the SOIC-28 wide body has θJA ≈ 80 °C/W (JEDEC 4-layer test board). With 60 mA peak and 3.6 V supply the package dissipates ~215 mW, yielding a junction temperature only ~17 °C above ambient. At high ambient (industrial +85 °C) the IC remains well below the 150 °C junction limit - no heat sink required. The bottleneck is usually the downstream gate driver, not the MCU itself.
Do not power AVDD through the VDD pin - each analog and digital pin has its own supply pad. Floating AVDD while ADC channels are active triggers spurious conversions that corrupt the motor current loop. Likewise, disable the JTAG port permanently via the JTAGEN fuse on production units to free pins 26 and 9 as GPIO; otherwise those pads will auctioneer incorrectly during PWM dead-time glitches.
Compliance Information
RoHS and lead-free status verified in the Microchip product environmental compliance program (n/a industrial grade / not automotive-grade). AEC-Q100 not certified - use AEC-Q100 equivalent PIC16 / dsPIC33EV for automotive deployment.
