DSPIC33FJ128MC204-I/ML - 16-bit DSC, 128KB, 40 MIPS | Microchip
MPN: DSPIC33FJ128MC204-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.89 | $5.89 |
| 10 | $5.41 | $54.10 |
| 100 | $4.95 | $495.00 |
| 500 | $4.6 | $2,300.00 |
| 1,000 | $4.25 | $4,250.00 |
DSPIC33FJ128MC204-I/ML Overview
A Digital Signal Controller combines the peripheral set and ease of use of a microcontroller with the computational throughput of a DSP core. In the power-management hierarchy of embedded systems, the dsPIC33F family sits between general-purpose MCUs and dedicated DSPs: it executes high-speed, repetitive computations such as PID loops, transform-based filtering, and digital power control while retaining deterministic interrupt behavior, rich on-chip peripherals, and single-supply flash programming. The dsPIC33FJ128MC204 belongs to the MC-series subgroup optimized for motor control and advanced analog integration.
Key features include a modified Harvard 16-bit DSP engine with 40-bit accumulators, dual fetch of operands, and single-cycle MAC; up to 40 MIPS operation at 3.3V; dedicated Motor Control PWM peripherals with complementary outputs and dead-time control; DMA channels that move data without CPU intervention; and industrial-grade operation from -40C to +85C. The 2.5V to 3.6V supply range and flash self-programming support field updates.
Technically, the device pairs a PIC24-class CPU with DSP instructions (MPY, ED, DO loops), an 8-channel high-speed 10-bit or 12-bit ADC with simultaneous sampling capability for three-phase current sensing, and pin compatibility with the PIC24HJ family, enabling seamless migration within the Microchip ecosystem as noted on the manufacturer product page.
Typical applications include brushless DC and PMSM motor drives (sensorless and sensored FOC), digital power supplies such as LLC and totem-pole PFC stages, and power inverters or UPS systems where high-resolution PWM and fast ADC sampling are mandatory.
Design consideration: place a low-ESR decoupling network (0.1 uF per VDD pin plus bulk capacitance) directly at the exposed-pad QFN, and solder the exposed thermal pad to a grounded pour for signal-integrity and thermal margin.
This page synthesizes distributor pricing from DigiKey, Mouser and LCSC, drop-in alternatives within the dsPIC33F/33EP/33EV families, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ128MC204-I/ML — 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 DSPIC33FJ128MC204-I/ML (same form factor and footprint) — differing in Operating Temperature, Package, Core, Maximum CPU Speed, Motor Control PWM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128MC804-I/ML
✅ Drop-In✓ In Stock
$5.95 / Unit
View Datasheet →DSPIC33FJ64MC204-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32MC204-I/ML
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP32MC204-I/ML
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →DSPIC33EP64MC204T-I/ML
✅ Drop-In✓ In Stock
$2.61 / Unit
View Datasheet →DSPIC33EV32GM104T-I/ML
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →DSPIC33FJ128MC204-I/ML Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F RISC with DSP engine |
| Maximum CPU Speed | 40 MIPS |
| Flash Program Memory | 128 KB |
| SRAM | 16 KB |
| Supply Voltage Range | 2.5 V to 3.6 V |
| Package | 44-QFN (8x8 mm), exposed pad (ML) |
| Operating Temperature | -40C to +85C (industrial, I suffix) |
| Mounting Type | Surface Mount |
| Motor Control PWM | Yes (dedicated MCPWM with complementary outputs and dead time) |
| DMA Channels | Yes (as per Mouser: 16B DSC 128KB DMA) |
| Family Compatibility | Pin compatible with PIC24HJ family |
| ADC | High-speed ADC with advanced analog features (per datasheet family description) |
| Data Path Width | 16 bit |
| Product Category | Digital Signal Controllers / DSC |
| Unit Price (LCSC) | from $5.8868 as of 2026-09-26 |
DSPIC33FJ128MC204-I/ML Pin Configuration
| Pin 1 | MCLR — Master clear reset input / programming voltage |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / ADC positive reference / change notification / port B0 |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / ADC negative reference / change notification / port B1 |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select 1 / change notification / port B2 |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / QEI index / change notification / port B3 |
| Pin 6 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / QEI phase A / capture 7 / change notification / port B4 |
| Pin 7 | AN5/QEB/IC8/CN7/RB5 — Analog input 5 / QEI phase B / capture 8 / change notification / port B5 |
| Pin 8 | AN6/OCFA/RB6 — Analog input 6 / PWM fault A / port B6 |
| Pin 9 | AN7/UPDN/REFO/RB7 — Analog input 7 / QEI up-down / reference clock output / port B7 |
| Pin 10 | AN8/FLT1/IMI1/RB8 — Analog input 8 / PWM fault 1 / input mirror 1 / port B8 |
| Pin 11 | AN9/FLT2/IMI2/RB9 — Analog input 9 / PWM fault 2 / input mirror 2 / port B9 |
| Pin 12 | TMS/AN10/RB10 — JTAG test mode select / analog input 10 / port B10 |
| Pin 13 | TCK/AN11/RB11 — JTAG test clock / analog input 11 / port B11 |
| Pin 14 | TDI/AN12/RB12 — JTAG test data in / analog input 12 / port B12 |
| Pin 15 | TDO/AN13/RB13 — JTAG test data out / analog input 13 / port B13 |
| Pin 16 | AN14/CVREF/RTCC/RB14 — Analog input 14 / comparator reference / RTCC output / port B14 |
| Pin 17 | AN15/OCFB/UPDN/RB15 — Analog input 15 / PWM fault B / QEI up-down / port B15 |
| Pin 18 | VDD — Positive supply (2.5 V to 3.6 V) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | OSC1/CLKI/RA2 — Oscillator crystal input / external clock input / port A2 |
| Pin 21 | OSC2/CLKO/RC15 — Oscillator crystal output / clock output / port C15 |
| Pin 22 | SOSCI/CN1/RC13 — Secondary oscillator input / change notification / port C13 |
| Pin 23 | SOSCO/T1CK/CN0/RA4 — Secondary oscillator output / Timer1 clock / change notification / port A4 |
| Pin 24 | VDD — Positive supply (2.5 V to 3.6 V) |
| Pin 25 | VSS — Ground reference |
| Pin 26 | PGD3/EMUD3/RP39 — ICSP/ICD data 3 / emulator data 3 / remappable pin RP39 |
| Pin 27 | PGC3/EMUC3/RP38 — ICSP/ICD clock 3 / emulator clock 3 / remappable pin RP38 |
| Pin 28 | PGD2/EMUD2/RP37 — ICSP/ICD data 2 / emulator data 2 / remappable pin RP37 |
| Pin 29 | PGC2/EMUC2/RP36 — ICSP/ICD clock 2 / emulator clock 2 / remappable pin RP36 |
| Pin 30 | VSS — Ground reference |
| Pin 31 | VDD — Positive supply (2.5 V to 3.6 V) |
| Pin 32 | PGD1/EMUD1/RP35 — ICSP/ICD data 1 (primary) / emulator data 1 / remappable pin RP35 |
| Pin 33 | PGC1/EMUC1/RP36B — ICSP/ICD clock 1 (primary) / emulator clock 1 / remappable pin |
| Pin 34 | RF0 — General purpose I/O / remappable pin |
| Pin 35 | RF1 — General purpose I/O / remappable pin |
| Pin 36 | RP32/RF2 — Remappable pin RP32 / U1RX default / port F2 |
| Pin 37 | RP33/RF3 — Remappable pin RP33 / U1TX default / port F3 |
| Pin 38 | RP34/RF4 — Remappable pin RP34 / SDA1 default / port F4 |
| Pin 39 | RP35B/RF5 — Remappable pin / SCL1 default / port F5 |
| Pin 40 | RC1 — General purpose I/O / remappable pin |
| Pin 41 | RC2 — General purpose I/O / remappable pin |
| Pin 42 | RC3 — General purpose I/O / remappable pin |
| Pin 43 | RC4 — General purpose I/O / remappable pin |
| Pin 44 | EP/VSS — Exposed thermal pad - connect to VSS ground pour (grounding and thermal relief) |
Typical Applications
DSPIC33FJ128MC204-I/ML is suitable for 6 applications: Brushless DC / PMSM Motor Drives, Digital Power Conversion (LLC, PFC, Inverters), Sensor Signal Conditioning and Digital Filtering, Industrial Automation and Motion Control, Power Inverters and Renewable Energy Converters, Embedded Control and Data Acquisition Systems.
Brushless DC / PMSM Motor Drives
The DSPIC33FJ128MC204-I/ML is purpose-built for three-phase BLDC and PMSM drives: its dedicated Motor Control PWM generates complementary output pairs with hardware dead-time insertion, while the high-speed ADC samples phase currents synchronized to the PWM period for field-oriented control. At 40 MIPS with a single-cycle MAC and 40-bit accumulators, the DSP engine executes current, speed, and position loops plus sensorless observers within a 10-20 kHz PWM cycle. A typical design uses the MCPWM for the six inverter switches and the ADC in simultaneous multi-channel mode to capture two phase currents and the DC bus voltage each cycle. The 128 KB Flash accommodates FOC with flux observers, parameter identification, and field-update headroom, and the 2.5-3.6 V supply simplifies integration with 3.3 V logic and gate-driver level shifting.
Recommended
Digital Power Conversion (LLC, PFC, Inverters)
In digital power supplies such as LLC resonant converters, totem-pole or boost PFC stages, and UPS inverters, the DSPIC33FJ128MC204-I/ML provides the control-loop bandwidth and PWM resolution the topology demands. The Motor Control PWM can be configured for phase-shifted or complementary operation with dead time, and the 40 MIPS DSP engine with single-cycle MAC implements the compensator (PI, PR, or 3p3z) computed each switching cycle. The high-speed ADC, triggered by the PWM, samples output voltage and inductor current at exactly the right instant, minimizing switching-noise corruption. DMA moves conversion results to RAM without CPU intervention, freeing cycles for housekeeping and protection logic. The 128 KB Flash stores multiple operating modes and supports firmware updates in the field, while the -40C to +85C industrial rating suits telecom and industrial power environments.
Recommended
Sensor Signal Conditioning and Digital Filtering
The DSPIC33FJ128MC204-I/ML serves as an intelligent sensor front end where analog signals require DSP-grade processing: vibration monitors, weigh scales, and acoustic sensors. Its high-speed ADC with advanced analog capability digitizes transducer outputs, and the DSP engine executes FIR/IIR filters, FFTs, and RMS calculations with single-cycle MAC throughput at 40 MIPS - performance a general-purpose MCU cannot sustain in real time. DMA channels stream ADC results to RAM in double-buffered blocks, enabling gap-free capture for spectral analysis. The 16 KB SRAM holds filter states and window buffers, while the 128 KB Flash stores calibration tables and multiple measurement profiles. Operation from 2.5 V to 3.6 V and -40C to +85C suits both portable and industrial instruments, and the exposed-pad QFN gives good ground integrity for low-noise analog performance.
Recommended
Industrial Automation and Motion Control
In factory automation nodes - conveyors, robotic joints, pump and fan drives - the DSPIC33FJ128MC204-I/ML combines deterministic control with rich communication-ready peripherals. The 40 MIPS core closes servo current loops with the Motor Control PWM and fast ADC, while remaining CPU bandwidth runs protocol stacks, sequencing, and diagnostics. DMA offloads ADC and UART traffic, keeping interrupt latency predictable for real-time control. The 128 KB Flash supports feature-rich firmware including fieldbus framing, homing routines, and safety-limit logic; the industrial temperature grade covers cabinet and floor environments. Because dsPIC33F devices are pin compatible with the PIC24HJ family per the manufacturer product page, a single PCB can host either a control-heavy dsPIC33 or a communication-heavy PIC24 variant, simplifying platform maintenance across a product family and reducing qualification effort.
Recommended
Power Inverters and Renewable Energy Converters
Solar micro-inverters, battery chargers, and small wind converters benefit from the DSPIC33FJ128MC204-I/ML's combination of control bandwidth, precision PWM, and analog integration. The MCPWM synthesizes the sinusoidal modulation for grid-tied or off-grid output stages with hardware dead time, and the high-speed ADC samples grid voltage, current, and DC-link conditions under PWM synchronization for accurate, low-distortion control loops. The 40 MIPS DSP engine runs MPPT algorithms, phase-locked loops for grid synchronization, and anti-islanding detection concurrently, with single-cycle MAC support for filter and transform computations. The 128 KB Flash stores certification firmware, communication stacks, and logging, and supports field upgrades. Its 2.5-3.6 V supply and industrial temperature range integrate cleanly with gate drivers and isolated sensing front ends common in power conversion designs.
Recommended
Embedded Control and Data Acquisition Systems
As a general embedded controller with DSP capability, the DSPIC33FJ128MC204-I/ML fits data loggers, test fixtures, and instrumentation where deterministic timing matters. The 40 MIPS core handles control tasks, while DMA plus the high-speed ADC provides synchronized multi-channel acquisition without software overhead. Peripherals inherited from the PIC24 architecture - UART, SPI, I2C, timers, input capture, and output compare - cover the standard connectivity set for sensors, memory, and host links. The 128 KB Flash and 16 KB SRAM support RTOS-based designs with protocol stacks and local storage of calibration data, and flash self-programming enables field updates. The 44-pin 8x8 mm QFN keeps board area small for dense modules, while the exposed pad and -40C to +85C rating ensure reliability in industrial enclosures. Existing dsPIC30F and PIC24 code migrates easily per Microchip's family compatibility statement.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128MC204-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128MC804-I/ML | DSPIC33FJ64MC204-I/ML | DSPIC33EP32MC204-I/ML | DSPIC33EV32GM104T-I/ML |
|---|---|---|---|---|---|
| Package | 44-QFN (8x8 mm, ML) | 44-QFN (ML) - same | 44-QFN (ML) - same | 44-QFN (ML) - same | 44-QFN (ML) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Architecture | 16-bit dsPIC33F DSC with DSP engine | 16-bit dsPIC33F (same) | 16-bit dsPIC33F (same) | 16-bit dsPIC33EP (newer core) | 16-bit dsPIC33EV (newer core) |
| Flash Program Memory | 128 KB | 128 KB | 64 KB | 32 KB | 32 KB |
| Maximum Speed | 40 MIPS | 40 MIPS | 40 MIPS | 60 MIPS | 70 MIPS |
| USB Peripheral | No | Yes (full-speed device) | No | No | No |
| ADC Resolution | High-speed 10/12-bit ADC | High-speed 10/12-bit ADC (same) | High-speed 10/12-bit ADC (same) | 12-bit SAR (upgraded) | 12-bit SAR (upgraded) |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Firmware Compatibility | Reference (dsPIC33F) | Drop-in (same core, USB added) | Drop-in (memory reduce only) | Recompile/revalidate required | Recompile/revalidate required |
Key Differentiators
- Motor-control-optimized peripheral set in a compact 44-pin QFN (vs DSPIC33FJ128GP802-E/SP)
- Largest Flash in the 44-pin MC204 family (vs DSPIC33FJ64MC204-I/ML)
- No USB complexity for cost-optimized designs (vs DSPIC33FJ128MC804-I/ML)
Design Notes
The 44-pin 8x8 mm QFN has a large exposed pad that must be soldered to a grounded copper pour with an array of thermal vias - it is the primary ground connection, not an optional thermal feature. Incomplete exposed-pad soldering is the most common cause of intermittent resets and ADC noise problems on QFN dsPIC33 designs. Decouple every VDD pin (pins 18, 24, 31) with a 0.1 uF ceramic placed within 2-3 mm, plus one 4.7-10 uF bulk capacitor per device. Follow Microchip's QFN layout application guidance in the family reference manual for stencil aperture design.
Estimated: total supply current depends on clock configuration - at 40 MIPS from the internal PLL on a 3.3 V rail, expect operation in the tens of milliamps range typical for the dsPIC33F family, so size the 3.3 V regulator accordingly and verify against the datasheet current-consumption tables for your exact clock setup. Keep the analog supply node clean: the high-speed ADC and PLL are sensitive to ripple from switching converters. Route the VDD plane separately from gate-driver supply switching loops and add local RC filtering if a buck converter shares the rail.
When migrating firmware from dsPIC30F or PIC24 devices, remember that the dsPIC33FJ configuration words, oscillator PLL settings, and peripheral register maps differ - never reuse configuration pragmas unmodified. The MCLR pin (pin 1) must not be left floating; use the internal pull-up plus an external 10 k pull-up for robust programming and reset. For ICSP programming, keep PGC1/PGD1 (pins 32-33) traces short and free of series components that block programming. Respect the 3.6 V absolute maximum on all I/O - 5 V signals require level shifting.
For motor control and digital power designs, synchronize ADC sampling to the MCPWM period trigger rather than polling, so current samples are taken at the PWM midpoint where switching noise is minimal. Route phase-current sensing traces differentially to the ADC pins, keep the analog ground return path separate until the exposed pad pour, and use the hardware dead-time generator rather than software delays for complementary outputs to guarantee shoot-through protection under all fault and clock conditions.
Compliance Information
Compliance data was not present in the retrieved web data. Confirm RoHS/REACH/lead-free status on the Microchip product page or the distributor compliance sections (DigiKey part 1635953, LCSC C642120) and Microchip Product Change Notifications before BOM release. The -I/ML is an industrial-grade variant, not an AEC-Q100 automotive-qualified part; automotive users should evaluate the dsPIC33EV family instead.
