DSPIC33FJ128MC202-I/SO - 16-bit 40 MIPS DSC 128KB Flash | Microchip
MPN: DSPIC33FJ128MC202-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.25 | $6.25 |
| 10 | $5.63 | $56.30 |
| 100 | $5 | $500.00 |
| 500 | $4.5 | $2,250.00 |
| 1,000 | $4.05 | $4,050.00 |
DSPIC33FJ128MC202-I/SO Overview
A Digital Signal Controller combines the computational architecture of a Digital Signal Processor (DSP) with the peripheral set and ease of use of a microcontroller (MCU). In the power-management hierarchy, the dsPIC33F family sits within Microchip's 16-bit PIC/dsPIC product line, positioned for high-speed, repetitive computation and closed-loop control tasks such as Field Oriented Control (FOC) of motors, where both multiply-accumulate DSP throughput and deterministic interrupt latency are required.
Key differentiating features include two PWM generators with independent timebases, the Peripheral Pin Select (PPS) capability that allows remapping of digital peripherals to available I/O pins, and an advanced analog front end with a high-speed 10-bit/12-bit ADC suited to motor current sensing. The 40 MIPS core executes DSP instructions for fast filter and transform loops, while 128KB of Flash supports complex control algorithms with self-programming for field updates.
Architecturally, the dsPIC33F engine is pin compatible with the PIC24H family and shares a high degree of compatibility with the dsPIC30F family, giving designers seamless migration paths across Microchip's 16-bit portfolio. Flash-based program memory eliminates the need for windowed or OTP devices and enables in-circuit serial programming (ICSP) via the PGECx/PGEDx pin pairs.
Typical applications include brushless DC and PMSM motor drives, digital power supplies and lighting ballasts, industrial control and embedded automation, and electronic metering - all cases where the motor-control PWM units and ADC sample timing align directly with the control-loop requirement.
Design-wise, remember that all VDD/VSS pairs must be decoupled with 0.1uF ceramics close to the pins, and the pair of PGECx/PGEDx pins chosen for ICSP must be used consistently as a pair for programming and debugging.
This page synthesizes verified distributor listings, pin-compatible alternatives, drop-in replacement options, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ128MC202-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 DSPIC33FJ128MC202-I/SO (same form factor and footprint) — differing in Operating Temperature, Package, Supply Voltage, ADC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128MC202-E/SO
✅ Drop-In✓ In Stock
$3.86 / Unit
View Datasheet →DSPIC33FJ128MC202A-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64MC202-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32MC202-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ128MC802-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ128GP202-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ128MC202-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F RISC DSC |
| Maximum CPU Speed | 40 MIPS |
| Program Memory Size | 128KB (128K x 8) Flash |
| SRAM Size | 16KB |
| Supply Voltage | 3.3 V |
| PWM Generators | 2 (independent timebases) |
| Peripheral Pin Select | Yes (PPS) |
| ADC | Advanced analog, high-speed |
| Package | 28-SOIC (0.295 in, 7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial, I suffix) |
| Programming Interface | ICSP via PGECx/PGEDx pin pairs |
| Pin Compatibility | PIC24H family, dsPIC30F/33F families |
| Family Positioning | dsPIC33F Motor Control, low-pin-count |
| RoHS Status | Compliant |
| Packaging | Tube |
DSPIC33FJ128MC202-I/SO Pin Configuration
| Pin 1 | MCLR — Master clear reset input, programming voltage |
| Pin 2 | AN0/VREF+/RB0 — Analog input 0 / ADC positive reference / port B |
| Pin 3 | AN1/VREF-/RB1 — Analog input 1 / ADC negative reference / port B |
| Pin 4 | AN2/SS1/RB2 — Analog input 2 / SPI slave select / port B |
| Pin 5 | AN3/INDX/RB3 — Analog input 3 / QEI index input / port B |
| Pin 6 | AN4/QEA/RB4 — Analog input 4 / QEI phase A / port B |
| Pin 7 | AN5/QEB/RB5 — Analog input 5 / QEI phase B / port B |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI — Oscillator input / external clock input |
| Pin 10 | OSC2/CLKO/RC15 — Oscillator output / clock output / port C |
| Pin 11 | VDD — Positive supply, 3.3V |
| Pin 12 | SOSCI/CN1/RB6 — Secondary oscillator input / change notification / ICSP data-capable pair / port B |
| Pin 13 | SOSCO/T1CK/CN0/RB7 — Secondary oscillator output / Timer1 clock / ICSP data-capable pair / port B |
| Pin 14 | VDD — Positive supply, 3.3V |
| Pin 15 | AN6/OCFA/RB8 — Analog input 6 / PWM fault A input / port B |
| Pin 16 | AN7/RB9 — Analog input 7 / port B |
| Pin 17 | AN8/RP15/RB10 — Analog input 8 / remappable peripheral pin / port B |
| Pin 18 | AN9/RP16/RB11 — Analog input 9 / remappable peripheral pin / port B |
| Pin 19 | AN10/RP17/RB12 — Analog input 10 / remappable peripheral pin / port B |
| Pin 20 | AN11/RP18/RB13 — Analog input 11 / remappable peripheral pin / port B |
| Pin 21 | AN12/RP27/RB14 — Analog input 12 / remappable peripheral pin / port B |
| Pin 22 | AN13/RP26/RB15 — Analog input 13 / remappable peripheral pin / port B |
| Pin 23 | VSS — Ground reference |
| Pin 24 | RP19/SDI1/RF2 — Remappable pin / SPI1 data input / port F |
| Pin 25 | RP20/SDO1/RF3 — Remappable pin / SPI1 data output / port F |
| Pin 26 | RP21/RF4 — Remappable peripheral pin / port F |
| Pin 27 | RP24/RF5 — Remappable peripheral pin / port F |
| Pin 28 | VDD — Positive supply, 3.3V |
Typical Applications
DSPIC33FJ128MC202-I/SO is suitable for 6 applications: Brushless DC / PMSM Motor Drives, Digital Power Supplies and Lighting Ballasts, Industrial Control and Embedded Automation, Electronic Metering and Energy Monitoring, IoT and Low-Power Embedded Nodes, Electric Vehicle Auxiliary Systems.
Brushless DC / PMSM Motor Drives
The DSPIC33FJ128MC202-I/SO fits sensorless and sensored BLDC/PMSM drives because its two PWM generators with independent timebases generate complementary or independent motor phase outputs while the high-speed ADC samples phase currents synchronized to PWM events. The 40 MIPS DSP core executes Field Oriented Control (FOC) math - Clark/Park transforms and PI current loops - well inside a 10-20 kHz control period. Peripheral Pin Select routes input-capture channels to hall-sensor inputs on the 28-pin SOIC. Running from a single 3.3V rail, the controller isolates low-voltage logic from the gate-driver stage through optocouplers or level shifters, and the industrial -40C to +85C rating covers typical drive-enclosure ambients.
Recommended
Digital Power Supplies and Lighting Ballasts
In digitally controlled AC-DC and DC-DC converters, the DSPIC33FJ128MC202-I/SO provides the deterministic PWM resolution and fast ADC needed for voltage-mode or current-mode loops at switching frequencies of 100 kHz and above. The two independent PWM timebases support interleaved topologies such as two-phase boost PFC, and the 40 MIPS core closes outer voltage loops with digital compensators. Its 128KB Flash stores firmware for multiple topologies plus a bootloader for field updates via ICSP. Compared with analog controllers, the DSC enables adaptive soft-start, feed-forward correction, and telemetry over UART, making it a common choice for LED ballasts, telecom rectifiers, and embedded AC-DC front ends.
Recommended
Industrial Control and Embedded Automation
For industrial nodes that combine sensing, actuation, and communication, the DSPIC33FJ128MC202-I/SO offers 128KB Flash for protocol stacks and state machines, 16KB SRAM for buffering, and Peripheral Pin Select to adapt UART/SPI mappings to the wiring of existing cabinets without PCB respins. The 40 MIPS core handles PID loops for temperature, pressure, and position at kilohertz rates, while input-capture and output-compare resources implement timing-critical I/O. The industrial -40C to +85C rating suits unconditioned factory environments. Suppliers position the part explicitly for embedded automation and industrial control, and its pin compatibility with PIC24H devices lets designers migrate to general-purpose MCUs when DSP math is not required.
Recommended
Electronic Metering and Energy Monitoring
Electronic energy meters benefit from the DSPIC33FJ128MC202-I/SO's DSP multiply-accumulate throughput, which computes RMS voltage/current, power factor, and active energy in real time from ADC samples of the mains waveform. The 128KB Flash accommodates metrology firmware, calibration tables, and communication stacks, while the industrial temperature range supports outdoor meter enclosures. Peripheral Pin Select maps a UART or SPI port to whichever pins reach the communication module on a compact 28-pin board. Distributors list metering as a primary use case for this low-pin-count Motor Control DSC, and Flash self-programming enables field calibration updates without replacing the socketed device.
Recommended
IoT and Low-Power Embedded Nodes
In IoT sensor nodes and connected devices, the DSPIC33FJ128MC202-I/SO bridges signal processing and connectivity: the DSP core filters and extracts features from sensor data locally, while a UART or SPI port links to a radio or Ethernet module. Its 3.3V single-supply operation simplifies integration with battery or low-voltage rails, and the low-pin-count 28-SOIC keeps board area small for embedded devices. Distributor overviews explicitly target IoT devices and low-power board designs for this part. The 128KB Flash supports over-the-air firmware staging in bootloader schemes, and Peripheral Pin Select allows the same PCB to serve multiple radio-module variants by firmware alone.
Recommended
Electric Vehicle Auxiliary Systems
Beyond traction inverters, EVs contain dozens of auxiliary motor-control points - pumps, fans, HVAC blowers, throttle actuators - where the DSPIC33FJ128MC202-I/SO provides cost-effective 40 MIPS control in a compact 28-SOIC footprint. Its dual PWM timebases drive small three-phase motors, the ADC handles current-limiting feedback, and the -40C to +125C-capable family variants (the -E/SO grade) tolerate under-hood and cabin thermal extremes. 128KB Flash leaves room for diagnostic routines and CAN communication firmware via an external CAN controller. Selecting the Extended Temperature drop-in variant keeps the identical footprint while meeting automotive thermal requirements, simplifying single-board qualification across vehicle zones.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128MC202-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128MC202-E/SO | DSPIC33FJ64MC202-I/SO | DSPIC33FJ128MC802-I/SO | DSPIC33FJ128GP202-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (7.50 mm) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Flash Memory | 128KB | 128KB | 64KB | 128KB | 128KB |
| Temperature Range | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Motor-Control PWM | 2 generators, independent timebases | 2 generators - same | 2 generators - same | Motor-control family PWM | Not motor-control optimized (GP family) |
| CAN/ECAN Module | CAN | CAN - same | CAN | ECAN (enhanced) | ECAN (GP family) |
| Typical Use Case | Motor control, digital power, metering | Same, in hot environments | Cost-reduced motor control | Motor control with ECAN networking | General-purpose embedded control |
Key Differentiators
- Motor-control PWM with independent timebases (vs DSPIC33FJ128GP202-I/SO)
- Extended-temperature drop-in available (vs DSPIC33FJ128MC202-E/SO)
- Peripheral Pin Select flexibility (vs DSPIC33FJ64MC202-I/SO)
Design Notes
Connect every VDD and VSS pin (pins 8, 11, 14, 23, 28) even if a supply pair appears unused - partial power connections cause erratic resets and programming failures. Decouple each VDD/VSS pair with 0.1uF ceramic capacitors placed within 3-5 mm of the pins, and add 4.7-10uF bulk capacitance near the 3.3V regulator. Programming-tool documentation for this device explicitly notes that all VDD and VSS pins must be connected for ICSP. Budget the 3.3V rail for the 40 MIPS core plus I/O load currents per the datasheet electrical characteristics section.
The device has more than one pair of PGECx/PGEDx programming pins - use any pair, but always as a matched pair (for example PGEC2 with PGED2 on the ICSP header). Route the chosen pair to a standard 5-pin ICSP header with MCLR, VDD, VSS so in-circuit programming and debugging never requires desoldering. On motor-control layouts, keep the ADC reference and current-sense traces away from PWM switching edges and gate-driver loops; Peripheral Pin Select lets you move PWM outputs to pins furthest from analog inputs rather than re-spinning the PCB.
Mismatches between silicon revisions cause subtle peripheral errata - verify your die revision (the 'A' variant DSPIC33FJ128MC202A-I/SO is the updated revision) against the Microchip errata document before production. When substituting the MC802 or GP202 family members on the same footprint, remember that peripheral sets differ (ECAN vs CAN, no motor-control PWM on GP) and firmware must be revalidated. Finally, the -I grade tops out at +85C ambient: for hot motor-drive enclosures, drop in the identical -E/SO extended-temperature variant rather than pushing the industrial part past its rating.
Compliance Information
Microchip standard products are RoHS-compliant and lead-free; REACH, halogen-free, and conflict-minerals status not explicitly stated in the provided data - confirm on the Microchip product page.
