DSPIC33FJ32MC302-I/SO - 16-bit DSC 40 MIPS 32KB Flash | Microchip
MPN: DSPIC33FJ32MC302-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.49 | $44.90 |
| 100 | $4.1 | $410.00 |
| 500 | $3.75 | $1,875.00 |
| 1,000 | $3.4 | $3,400.00 |
DSPIC33FJ32MC302-I/SO Overview
A digital signal controller combines the deterministic control structure of a microcontroller with the numeric throughput of a DSP. Within the power-management hierarchy of embedded processors, the dsPIC33F family sits between general-purpose MCUs and dedicated DSPs, pairing a modified Harvard 16-bit core with DSP-engine instructions, high-speed PWM peripherals and advanced analog blocks on one die.
Key features include the 40 MIPS core with 16 sixteen-bit working registers, a motor-control PWM module with center-aligned and complementary outputs, a high-speed 10-bit ADC, up to four analog comparators with direct PWM trip connections, and DMA support as noted by distributor listings (28LD 32KB DMA 40MIPS). Flash self-programming enables field firmware updates.
Architecture-wise, the dsPIC33FJ32MC302 belongs to the dsPIC33FJ32MC302/304 family documented in Microchip datasheet DS70291, sharing pin compatibility with the PIC24HJ family and a high degree of software compatibility with the dsPIC30F family, allowing seamless migration across PIC24F, dsPIC30F and dsPIC33F devices.
Typical applications include brushless DC and permanent-magnet motor control, digital power converters (PFC, LLC, inverters), and sensor conditioning with on-chip comparators - all cases where 40 MIPS DSP throughput and hardware PWM resolution matter more than raw MHz.
Design consideration: the 3.0 V to 3.6 V supply range means a regulated 3.3 V rail is mandatory; verify comparator trip thresholds against the actual VDD before relying on fixed reference trips.
This page adds distributor pricing, verified drop-in family alternatives, and design guidance not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ32MC302-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 DSPIC33FJ32MC302-I/SO (same form factor and footprint) — differing in Package, RoHS Status, Supply Voltage, Mounting Type, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32MC202T-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32MC302-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32MC202-I/SP
✅ Drop-In✓ In Stock
$3.25 / Unit
View Datasheet →DSPIC33FJ32MC102T-I/SO
✅ Drop-In✓ In Stock
$3.3 / Unit
View Datasheet →DSPIC33FJ32MC101T-I/SO
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →DSPIC33FJ32MC302-I/SO Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F 16-bit |
| Max CPU Speed | 40 MIPS |
| Flash Memory | 32 KB (32K x 8) |
| Supply Voltage | 3 V to 3.6 V |
| Operating Temperature | -40C to +85C |
| Package | 28-SOIC (wide, 300 mil) |
| Mounting Type | Surface Mount |
| Peripherals | Motor Control PWM, 10-bit ADC, Comparators, DMA |
| Programmability | In-Circuit Serial Programming (ICSP), self-programming Flash |
| Debug Interface | PGEC/PGED In-Circuit Debug pairs |
| RoHS Status | Lead-free, RoHS compliant (per datasheet packaging description) |
| Lifecycle Status | Active |
| Family Compatibility | Pin compatible with PIC24HJ; code compatible with dsPIC30F/dsPIC33F |
DSPIC33FJ32MC302-I/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low), programming voltage input |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive ADC reference / port B0 |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative ADC reference / port B1 |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select / port B2 |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / encoder index / port B3 |
| Pin 6 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / encoder A / capture 7 / port B4 |
| Pin 7 | AN5/QEB/IC8/CN7/RB5 — Analog input 5 / encoder B / capture 8 / port B5 |
| Pin 8 | VSS — Digital ground |
| Pin 9 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Pin 10 | OSC2/CLKO/RC15 — Oscillator crystal output / clock output / port C15 |
| Pin 11 | EMUD1/SOSCI/CN1/RC13 — Emulation D1 / secondary oscillator input / port C13 |
| Pin 12 | EMUC1/SOSCO/T1CK/CN0/RA4 — Emulation C1 / secondary oscillator output / Timer1 clock / port A4 |
| Pin 13 | VDD — Power supply (3 V to 3.6 V) |
| Pin 14 | EMUD/U1TX/SDO1/RF3 — Emulation D / UART1 TX / SPI1 data out / port F3 |
| Pin 15 | EMUC/U1RX/SDI1/RF2 — Emulation C / UART1 RX / SPI1 data in / port F2 |
| Pin 16 | PGEC2/AN6/OCFA/RB6 — Programming clock 2 / analog input 6 / PWM fault A / port B6 |
| Pin 17 | PGED2/AN7/OC2/RB7 — Programming data 2 / analog input 7 / compare 2 output / port B7 |
| Pin 18 | AN8/PWM1L1/RE0 — Analog input 8 / PWM1 low output / port E0 |
| Pin 19 | AN9/PWM1H1/RE1 — Analog input 9 / PWM1 high output / port E1 |
| Pin 20 | AN10/T5CK/PWM1L2/RE2 — Analog input 10 / Timer5 clock / PWM1 low 2 / port E2 |
| Pin 21 | AN11/PWM1H2/RE3 — Analog input 11 / PWM1 high 2 / port E3 |
| Pin 22 | AN12/PWM2L1/RE4 — Analog input 12 / PWM2 low 1 / port E4 |
| Pin 23 | AN13/PWM2H1/RE5 — Analog input 13 / PWM2 high 1 / port E5 |
| Pin 24 | AN14/PWM2L2/RE6 — Analog input 14 / PWM2 low 2 / port E6 |
| Pin 25 | AN15/PWM2H2/RE7 — Analog input 15 / PWM2 high 2 / port E7 |
| Pin 26 | AVSS — Analog ground |
| Pin 27 | AVDD — Analog power supply (3 V to 3.6 V) |
| Pin 28 | VDD — Power supply (3 V to 3.6 V) |
Typical Applications
DSPIC33FJ32MC302-I/SO is suitable for 6 applications: BLDC / PMSM Motor Control, Digital Power Conversion (PFC, LLC, Inverters), Sensor Signal Conditioning, Industrial Automation and Control Panels, Audio and Signal Processing Nodes, Portable and Battery-Powered Equipment.
BLDC / PMSM Motor Control
The DSPIC33FJ32MC302-I/SO fits brushless DC and permanent-magnet synchronous motor drives because its motor-control PWM module generates complementary, center-aligned outputs with hardware dead-time insertion at 40 MIPS core throughput, while QEA/QEB encoder inputs (RB4/RB5) and the INDX input (RB3) accept rotor position feedback without CPU overhead. On-chip comparators connect directly to the PWM for hardware overcurrent trip, shutting down outputs in microseconds without software latency. In a typical sensorless or encoder-based drive, the ADC samples phase currents synchronously with PWM centers to avoid switching noise. The trade-off versus a general-purpose MCU is that all control-loop math runs on the DSP engine with deterministic cycle counts, enabling stable current-loop bandwidths well above what an 8-bit controller achieves at the same clock rate.
Recommended
Digital Power Conversion (PFC, LLC, Inverters)
Switched-mode power stages benefit directly from this DSC's combination of 40 MIPS execution, high-resolution PWM with programmable dead time, and fast analog comparators that implement cycle-by-cycle current limiting in hardware. Per the dsPIC33FJ32MC302/304 family datasheet (DS70291), the MC family was architected for 'Motor Control PWM and Advanced Analog', which translates equally to PFC, LLC and DC-AC inverter control. The ADC can be triggered by the PWM time base so voltage and current samples land at constant, ripple-free points in each switching period. Designers should budget CPU cycles carefully at high switching frequencies: at 100 kHz switching with a 40 MIPS core, only 400 cycles per period are available for the control law, making the DSP-engine MAC instructions and DMA-driven ADC results essential for closing both voltage and current loops.
Recommended
Sensor Signal Conditioning
With multiple analog inputs (AN0-AN15 mapped to the RB and RE ports), a high-speed 10-bit ADC, and up to four comparators with selectable references, the DSPIC33FJ32MC302-I/SO conditions sensor signals end-to-end on-chip. Comparators can threshold thermistor or current-shunt signals and interrupt or trip the PWM directly, while the ADC digitizes slower channels for the DSP engine, which performs filtering (IIR/FIR via DSP instructions) at 40 MIPS. The 3 V to 3.6 V supply matches common 3.3 V sensor rails, simplifying board-level power. For accuracy-critical designs, power AVDD through an RC filter and calibrate gain/offset in firmware using Flash self-programming to store coefficients. This replaces an external op-amp-plus-ADC front end in cost-sensitive industrial sensor nodes while retaining deterministic response.
Recommended
Industrial Automation and Control Panels
Industrial controllers demand the -40C to +85C industrial temperature grade, noise immunity, and deterministic behavior that the DSPIC33FJ32MC302-I/SO provides in its 28-pin SOIC package. Per Microchip, dsPIC33F devices are pin compatible with PIC24HJ and highly code compatible with dsPIC30F, so panel designs can migrate between families without re-spinning the PCB. Typical roles include pump/fan inverter control, conveyor drives, and actuator sequencing, where the hardware PWM drives IGBT/MOSFET gate stages and the comparators implement fast fault shutdown. The ICSP/ICD interface (PGEC/PGED pairs) allows field firmware updates through the existing harness, and self-programming Flash stores parameter sets. Designers should verify 3.3 V rail integrity in electrically noisy cabinets with local bulk and 0.1 uF decoupling at pins 13, 27 and 28.
Recommended
Audio and Signal Processing Nodes
The dsPIC33F DSP engine (single-cycle MAC, 40 MIPS, sixteen 16-bit working registers per DS70291) supports real-time audio filtering, AGC and tone control at moderate sample rates. The 10-bit ADC can ingest microphone or line-level signals after external biasing, and PWM-based class-D style outputs or filtered PWM DAC outputs provide low-cost analog reconstruction where a codec is overkill. Because the device shares the 16-bit modified Harvard architecture with PIC24HJ, C compilers and libraries for DSP primitives (FFT, filters) are mature. For consumer audio accessories running from a 3.3 V rail, the -I temperature grade and 28-SOIC footprint keep BOM cost low. Note the ADC's 10-bit resolution limits SNR versus a dedicated audio codec, so choose this DSC when control plus light DSP combine in one chip rather than for hi-fi playback paths.
Recommended
Portable and Battery-Powered Equipment
Portable instruments and battery tools benefit from the DSC's single 3 V to 3.6 V supply, low peripheral-count integration (PWM, ADC, comparators on-chip) and 28-SOIC surface-mount footprint that suits compact two-layer boards. The DMA capability offloads ADC result transfers so the CPU can sleep between control cycles, and the -I grade covers outdoor temperature excursions. Design considerations for battery operation: the strict 3.6 V maximum means a low-dropout regulator or buck converter must clamp a fully charged Li-ion cell (4.2 V); the RTC/oscillator circuit on OSC1/OSC2 supports low-power timing; and Flash self-programming allows logging calibration data without external EEPROM. Estimated: at 3.3 V nominal, every milliamp of average core current equals roughly 3.3 mW, so gate off peripherals in idle loops to maximize battery life.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32MC302-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32MC202T-I/SO | DSPIC33FJ32MC302-E/SO | DSPIC33FJ32MC102T-I/SO | DSPIC33FJ32MC101T-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (wide) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB | 12 KB-class |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C |
| Supply Voltage | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V |
| Motor Control PWM | Yes | Yes | Yes | Yes (reduced channels) | Yes (reduced channels) |
| Lifecycle Status | Active | Active | Active | Active | Active |
Key Differentiators
- Purpose-built motor-control peripherals vs GP MC siblings (vs DSPIC33FJ32GP202T-I/SO)
- Industrial temperature coverage with upgrade path (vs DSPIC33FJ32MC302-E/SO)
- Full 32 KB Flash within the same footprint (vs DSPIC33FJ32MC102T-I/SO)
Design Notes
The device operates from a strict 3 V to 3.6 V rail with separate VDD (pins 13, 28) and AVDD (pin 27) supplies. Decouple each pin with a 0.1 uF ceramic placed within 3-5 mm, plus one 4.7-10 uF bulk capacitor per rail. Power AVDD from VDD through an RC or ferrite filter to keep ADC reference noise low. Never feed a Li-ion cell (4.2 V) directly - use an LDO or buck to regulate to 3.3 V.
Use any PGECx/PGEDx pair for ICSP but keep them as matched pairs (e.g., PGEC2 on pin 16 with PGED2 on pin 17) and route both to a 5-pin programming header with MCLR. Keep the analog ground island under AVSS/AVDD traces separate from PWM gate-drive returns; single-point tie at the bulk capacitor prevents motor switching currents from corrupting ADC readings.
Three frequent mistakes: (1) treating RB0-RB7 pins as digital-only outputs while the ADC input multiplexer is still connected, which skews readings - configure ANSEL-equivalent registers at reset; (2) exceeding 3.6 V on MCLR during ICSP - use the programmer's specified VPP circuit; (3) assuming identical peripheral counts across the MC101/102/202/302 family - verify Flash and comparator counts in DS70291 before substituting a lower-memory drop-in.
Estimated: at 40 MIPS with typical I/O loading, core current is in the tens of milliamps, giving roughly 100-150 mW dissipation at 3.3 V. The 28-pin wide SOIC theta_JA on a standard four-layer board supports this without heatsinking. Only extended-ambient enclosures above 85C require stepping to the -E/SO grade (+125C).
Compliance Information
Datasheet packaging description for SOIC variants states 'LEAD FREE, PLASTIC'; RoHS compliance inferred from lead-free packaging data and active Microchip catalog status. REACH/halogen/conflict-minerals status not stated in provided data.
