DSPIC33FJ128MC202T-I/MM - 16-bit DSC 128KB 40MIPS | Microchip
MPN: DSPIC33FJ128MC202T-I/MM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.78 | $5.78 |
| 10 | $5.49 | $54.90 |
| 100 | $5.12 | $512.00 |
| 500 | $4.75 | $2,375.00 |
| 1,000 | $4.38 | $4,380.00 |
DSPIC33FJ128MC202T-I/MM Overview
A digital signal controller combines the deterministic interrupt handling and peripherals of a microcontroller with the multiply-accumulate (MAC) DSP engine of a digital signal processor. Within the power-management hierarchy, the dsPIC33F family sits between general-purpose MCUs (PIC24) and dedicated DSPs, making it the natural choice for embedded control loops that also perform fast filtering, transforms or motor-field calculations.
Key features include the 16-bit modified Harvard architecture with a 40 MIPS core, a 7-channel DMA controller that moves data without CPU intervention, motor-control PWM peripherals, and advanced analog including a high-speed 10-bit/12-bit ADC suited to current-loop sampling. Flash is rated for 10,000 erase/write cycles and the device operates from a single 3.0V to 3.6V supply.
Architecturally, the dsPIC33F core couples two 40-bit accumulators, a 17-bit x 17-bit hardware multiplier and single-cycle MAC, enabling FIR/IIR filtering and Clarke/Park transforms at sample rates unattainable on classic 8-bit MCUs. The device is pin compatible with the PIC24H family, allowing software-architecture reuse across platforms.
Typical applications include sensorless and field-oriented BLDC/PMSM motor control, switch-mode power supplies and digital power conversion, and embedded audio or signal-conditioning front ends.
Design consideration: the 28-pin QFN exposed pad should be soldered to a solid ground pour for thermal dissipation and EMI performance; at 40 MIPS, decouple VDD pins with 0.1uF ceramics placed within 2 mm of each supply pin.
This page synthesizes distributor pricing, same-family drop-in alternatives, pinout data and practical design notes not found together in the manufacturer datasheet. Pricing referenced as of 2026-09-26.
Drop-in alternatives for DSPIC33FJ128MC202T-I/MM — 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 DSPIC33FJ128MC202T-I/MM (same form factor and footprint) — differing in Package, DMA Channels, Timers, Operating Temperature, Communication Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128MC202-E/MM
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.13 / Unit
View Datasheet →DSPIC33FJ128MC202T-H/MM
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ64MC202-I/MM
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.4 / Unit
View Datasheet →DSPIC33FJ32MC202-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC24HJ128GP202-I/MM
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ128MC202T-I/MM Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F modified Harvard with DSP engine |
| Max CPU Speed | 40 MIPS |
| Program Memory (Flash) | 128KB (128K x 8) |
| SRAM | 16KB |
| Supply Voltage | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (Industrial, -I suffix) |
| Package | 28-QFN-S (6x6 mm) exposed pad (MM) |
| Mounting Type | Surface Mount |
| ADC Resolution | 10-bit / 12-bit high-speed ADC |
| DMA Channels | 7 channels |
| Timers | Multiple 16-bit timers (CTMU-compatible timer set) |
| Communication Interfaces | UART, SPI, I2C, ECAN-capable family peripherals |
| Motor Control PWM | Dedicated Motor Control PWM module |
| Flash Endurance | 10,000 erase/write cycles (family specification) |
| Instruction Set | Single-cycle MAC, 17x17 hardware multiplier, two 40-bit accumulators |
| Family Pin Compatibility | Pin compatible with PIC24H family devices |
DSPIC33FJ128MC202T-I/MM 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 / port B0 |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / ADC negative 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 / QEI index / port B3 |
| Pin 6 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / QEI phase A / input capture 7 / port B4 |
| Pin 7 | VDD — Power supply (3.0 V to 3.6 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/CN7/RA2 — Oscillator input / external clock input / port A2 |
| Pin 10 | OSC2/CLKO/RA3 — Oscillator output / clock output / port A3 |
| Pin 11 | EXTREF/RB5/CN27 — Comparator external reference / port B5 |
| Pin 12 | VDD — Power supply (3.0 V to 3.6 V) |
| Pin 13 | VSS — Ground reference |
| Pin 14 | PGD1/RB6/CN1 — ICSP programming data / port B6 |
| Pin 15 | PGC1/RB7/CN — ICSP programming clock / port B7 |
| Pin 16 | AN9/RP2/RB8 — Analog input 9 / remappable peripheral pin RP2 / port B8 |
| Pin 17 | AN10/RP3/RB9 — Analog input 10 / remappable peripheral pin RP3 / port B9 |
| Pin 18 | AN11/RP4/RB10 — Analog input 11 / remappable peripheral pin RP4 / port B10 |
| Pin 19 | AN12/RP5/RB11 — Analog input 12 / remappable peripheral pin RP5 / port B11 |
| Pin 20 | AN13/RP6/RB12 — Analog input 13 / remappable peripheral pin RP6 / port B12 |
| Pin 21 | AN14/RP7/RB13 — Analog input 14 / remappable peripheral pin RP7 / port B13 |
| Pin 22 | AN15/RP8/RB14 — Analog input 15 / remappable peripheral pin RP8 / port B14 |
| Pin 23 | RP9/RB15/CN — Remappable peripheral pin RP9 / port B15 |
| Pin 24 | RTCC/RP10 — RTCC related / remappable peripheral pin RP10 |
| Pin 25 | VSS — Ground reference |
| Pin 26 | VDD — Power supply (3.0 V to 3.6 V) |
| Pin 27 | SOSCI/RP12/RC13 — Secondary oscillator input / remappable peripheral pin RP12 / port C13 |
| Pin 28 | SOSCO/RP13/RC14 — Secondary oscillator output / remappable peripheral pin RP13 / port C14 |
Typical Applications
DSPIC33FJ128MC202T-I/MM is suitable for 6 applications: BLDC/PMSM Motor Control, Digital Power Conversion (SMPS/PFC), Industrial Automation and Sensing, Audio and Signal Processing Front Ends, Portable and Battery-Powered Instruments, Automotive-Adjacent Embedded Control (Non-AEC).
BLDC/PMSM Motor Control
The DSPIC33FJ128MC202T-I/MM is purpose-built for precision motor control: its 40 MIPS dsPIC33F core executes field-oriented control (FOC) current loops with the single-cycle MAC DSP engine, while the dedicated motor-control PWM module provides complementary outputs with hardware dead-time insertion. The high-speed 10/12-bit ADC samples phase currents synchronized to the PWM cycle, and the 7-channel DMA transfers results without CPU intervention, keeping loop latency deterministic. In a typical sensorless BLDC drive, the 128KB Flash holds the FOC algorithm, startup/observer code and parameter tables with ample headroom. Use the QFN exposed pad as ground for clean ADC references, and route PWM switching away from analog inputs to preserve current-sense accuracy.
Recommended
Digital Power Conversion (SMPS/PFC)
Switch-mode power supplies and digital PFC stages benefit directly from this DSC's combination of 40 MIPS throughput, fast ADC sampling and DMA. The control law - voltage loop, current loop and nonlinear limiters - executes at switching frequency with cycle-by-cycle current-mode control implemented in the DSP engine, achieving dynamic response superior to analog compensation. The 128KB Flash accommodates soft-start state machines, protection logic (overcurrent, overvoltage, brownout) and telemetry code simultaneously. Operating from a 3.3V rail, the controller interfaces to gate drivers via its PWM outputs. Designers should budget PWM dead-time in firmware and use the ADC early-interrupt feature to sample mid-ramp, minimizing switching-noise pickup in the current-feedback path.
Recommended
Industrial Automation and Sensing
In factory automation nodes, the DSPIC33FJ128MC202T-I/MM combines real-time control with robust communication. Its UART, SPI and I2C peripherals connect to sensors, displays and field-bus bridges, while the DSP engine performs digital filtering (IIR notch, moving-average) on noisy transducer signals at kHz rates. The 7-channel DMA keeps communication buffers serviced without interrupt latency, and the industrial -40C to +85C temperature grade suits panel-mounted and unconditioned environments. The 28-pin QFN fits compact I/O modules on a 6x6 mm footprint. Pin compatibility within the dsPIC33FJ MC202 family (32KB/64KB/128KB) lets one PCB design serve multiple product tiers by swapping the controller and adjusting the linker script.
Recommended
Audio and Signal Processing Front Ends
Embedded audio processing - AGC, parametric EQ, echo cancellation pre-processing - maps efficiently onto the two 40-bit accumulators and 17x17 multiplier of this DSC. At 40 MIPS, a 64-tap FIR filter at 48 kHz sample rate consumes only a small fraction of the cycle budget, leaving headroom for control and communication tasks. The 128KB Flash stores filter coefficients, boot code and UI logic; the 16KB SRAM holds delay lines. SPI connects to audio codecs, while UART handles command interfaces. Note that the 3.0V-3.6V supply range requires level-shifting to 5V codec rails, and the internal ADC, while fast, is optimized for control rather than audiophile-grade conversion - use an external codec for the analog path.
Recommended
Portable and Battery-Powered Instruments
Handheld meters, loggers and portable testers use the DSPIC33FJ128MC202T-I/MM's small 6x6 mm QFN footprint and single 3.3V rail to save board area and BOM cost. The DMA controller offloads periodic ADC sampling so the CPU can sleep between measurements, and the family's power-management features (doze, idle modes) support aggressive duty-cycling for long battery life. The 128KB Flash supports complex measurement algorithms, calibration tables and multi-language UIs. The industrial temperature grade covers cold-storage and outdoor field use. Layout tip: keep the crystal loop short on OSC1/OSC2 (pins 9/10) and ground the exposed pad solidly to reduce radiated emissions from the 40 MHz clock in compact enclosures.
Recommended
Automotive-Adjacent Embedded Control (Non-AEC)
For aftermarket automotive and off-highway equipment that does not mandate AEC-Q100 qualification, this DSC's 40 MIPS performance handles pump, fan, and actuator control with sensorless algorithms, while its 128KB Flash stores fault logs and OTA-update bootloaders. Communication to vehicle networks uses ECAN-family peripherals bridged through an external CAN transceiver. The -40C to +85C industrial grade covers most under-dash and engine-bay-adjacent locations, though designers targeting genuine automotive programs should verify qualification requirements - this standard part is not AEC-Q100 listed in the retrieved data. Use the QFN exposed pad as a low-inductance ground and add transient suppression on harness-connected I/O lines per typical automotive application practice.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128MC202T-I/MM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128MC202-E/MM | DSPIC33FJ64MC202-I/MM | DSPIC33FJ32MC202-I/MM |
|---|---|---|---|---|
| Package | 28-QFN (6x6 mm, MM) | 28-QFN (6x6 mm, MM) - same | 28-QFN (6x6 mm, MM) - same | 28-QFN (6x6 mm, MM) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128KB (128K x 8) | 128KB | 64KB | 32KB |
| Max CPU Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| 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 |
| DMA Channels | 7 channels | 7 channels | 7 channels | 7 channels |
Key Differentiators
- Maximum Flash capacity in the 28-pin MC202 family (vs DSPIC33FJ64MC202-I/MM)
- Extended-temperature sibling available without redesign (vs DSPIC33FJ128MC202-E/MM)
- Motor-control-optimized peripherals vs general-purpose PIC24H (vs PIC24HJ128GP202-I/MM)
Design Notes
The 28-QFN (MM) package has an exposed thermal pad that must be soldered to a stitched ground pour - it is the primary ground return and thermal path, not optional. Use a 4x4 via array under the pad to tie it to internal ground planes. All three VDD pins (7, 12, 26) and the multiple VSS pins each need a 0.1uF ceramic decoupling capacitor placed within 2 mm, plus one 4.7uF-10uF bulk capacitor per power island. Follow the QFN land-pattern guidelines in the Microchip datasheet mechanical drawings.
The device requires a regulated 3.0V-3.6V rail. Estimated current draw: at 40 MIPS with all peripherals active, family documentation suggests roughly 60-70 mA typical plus I/O load - budget the regulator accordingly and verify against the datasheet electrical characteristics table for your exact peripheral configuration. Add a 10uF bulk capacitor near the regulator output. If driving high-side gate drivers directly from PWM pins, account for transient current on VDD and increase local decoupling to prevent supply droop during simultaneous PWM edges.
Three recurring issues with this part: (1) ICSP programming requires MCLR (pin 1) isolated from reset-load circuitry with an appropriate resistor and the PGD1/PGC1 pins (14/15) routed to a programming header - omitting this makes field updates impossible. (2) On 28-pin variants, peripheral pin selection (RPn remapping) must be configured before UART/SPI functions appear on shared pins; defaults are digital inputs. (3) Verify oscillator configuration fuse settings - an incorrect PLL config can leave the core running from the default FRC rather than the expected 40 MIPS, silently degrading control-loop timing.
At 40 MIPS the internal clock harmonics radiate efficiently from long traces. Keep the primary oscillator crystal loop (pins 9/10) under 10 mm with guard ground. For ADC accuracy in motor-control or power applications, route current-sense inputs differentially where possible, use the ADC sampling synchronized to the PWM period (trigger from PWM module rather than free-running), and insert a small RC anti-alias filter matched to the datasheet-recommended source impedance. Separate analog ground from PWM return currents, tying them at a single point under the exposed pad.
Compliance Information
RoHS/REACH/lead-free status for this exact MPN was not stated in the retrieved distributor data. Verify via Microchip's product page RoHS certificate before regulated-market release.
