DSPIC33FJ128MC204T-I/ML - 16-Bit 40MIPS DSC 128KB Flash | Microchip
MPN: DSPIC33FJ128MC204T-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $6.32 | $63.20 |
| 100 | $5.94 | $594.00 |
| 500 | $5.42 | $2,710.00 |
| 1,000 | $4.98 | $4,980.00 |
DSPIC33FJ128MC204T-I/ML Overview
A digital signal controller combines the compute power of a DSP with the peripheral integration and ease of use of a microcontroller, occupying the middle of the embedded hierarchy between general-purpose MCUs and dedicated DSPs. The dsPIC33F family executes high-speed repetitive math (multiply-accumulate, digital filters, PI control loops) while integrating motor-control PWM, advanced analog, and communication peripherals on one chip.
Key features of this device include the 40 MIPS dsPIC33F core, 128KB (128K x 8) Flash, 16KB data RAM, 8 DMA channels that move data without CPU intervention, 5 timers, and 2 serial I/O ports. The -I suffix denotes the industrial temperature grade of -40C to +85C, and the device is built on a CMOS process supporting a 3.0V to 3.6V supply range. Motor-control peripherals include PWM modules and advanced analog inputs suited to closed-loop digital control.
The architecture is pin compatible with the PIC24HJ family and shares a high degree of compatibility with the dsPIC30F family, so firmware and PCB designs migrate easily across Microchip 16-bit platforms. The DMA engine offloads ADC results and UART/SPI traffic, keeping the CPU free for control-loop math at deterministic rates.
Typical applications include BLDC/PMSM motor control, digital power supplies (power factor correction, LLC converters), industrial automation sensors, and digital audio processing, where the 40 MIPS core and motor-control PWM peripherals enable precise, high-frequency control loops in a single low-cost 44-QFN device.
For design, note that QFN thermal and signal integrity depend on the exposed pad: connect the die-attach pad to a solid ground plane with an array of vias. Verify Flash erase/write voltage requirements and use Microchip MPLAB X with a PICkit or ICD programmer for development.
This page adds distributor pricing tiers, drop-in family alternatives, and practical design guidance not found on the manufacturer product page.
Drop-in alternatives for DSPIC33FJ128MC204T-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 DSPIC33FJ128MC204T-I/ML (same form factor and footprint) — differing in DMA Channels, Package, Flash Program Memory, Core Architecture, Motor Control PWM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128MC204T-E/ML
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128MC204T-H/ML
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ64MC204T-I/ML
✅ Drop-In✓ In Stock
$5.42 / Unit
View Datasheet →DSPIC33FJ128MC204-I/ML
✅ Drop-In✓ In Stock
$4.25 / Unit
View Datasheet →DSPIC33FJ128GP204
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ128MC204T-I/ML Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F 16-bit |
| Maximum Clock / Performance | 40 MHz / 40 MIPS |
| Flash Program Memory | 128 KB (128K x 8) |
| Data RAM (SRAM) | 16 KB |
| DMA Channels | 8 |
| Timers | 5 |
| Serial I/O Ports | 2 |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Technology | CMOS |
| Temperature Grade | -40C to +85C (Industrial, I suffix) |
| Package | 44-QFN (8x8 mm), HVQCCN, 0.65 mm terminal pitch |
| Mounting Type | Surface Mount |
| Packaging | Tape and Reel (T suffix) |
| Family Compatibility | Pin compatible with PIC24HJ family |
| RoHS Status | Compliant |
| Peripherals | Motor Control PWM, Advanced Analog |
DSPIC33FJ128MC204T-I/ML 44-qfn (8x8 mm), hvqccn, 0.65 mm terminal pitch Pin Configuration Guide
Pin configuration for DSPIC33FJ128MC204T-I/ML (44-qfn (8x8 mm), hvqccn, 0.65 mm terminal pitch package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for DSPIC33FJ128MC204T-I/ML.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ128MC204T-I/ML is suitable for 6 applications: BLDC / PMSM Motor Control, Digital Power Supplies (PFC / LLC), Industrial Automation and Sensing, Digital Audio and Speech Processing, Embedded Motion and Robotics, Consumer Appliances with Motor Drive.
BLDC / PMSM Motor Control
The DSPIC33FJ128MC204T-I/ML is purpose-built for brushless DC and permanent-magnet synchronous motor control. Its 40 MIPS core executes field-oriented control (FOC) with space-vector PWM at loop rates of 10-20 kHz, while dedicated motor-control PWM peripherals generate complementary outputs with dead-time insertion. The 8-channel DMA streams ADC current-sense samples into RAM without CPU intervention, preserving cycle budget for the control math. Placed as the main controller between current-shunt amplifiers and a three-phase gate driver, it provides deterministic single-cycle MAC operations for Clarke/Park transforms. The 128KB Flash accommodates sensorless observer algorithms plus protection and communication firmware with margin, and 3.3V operation matches standard gate-driver logic levels for compact inverter designs.
Recommended
Digital Power Supplies (PFC / LLC)
In digitally controlled power supplies, the DSPIC33FJ128MC204T-I/ML closes voltage and current loops in PFC and LLC stages with its 40 MIPS core and high-speed ADCs sampled via DMA. Single-cycle multiply-accumulate operations implement digital compensators (type-II/III) at switching frequencies up to several hundred kilohertz, while the motor-control PWM module produces phase-shifted and complementary drive with sub-nanosecond-scale resolution suitable for LLC half-bridge topologies. The 128KB Flash holds multiple operating profiles and soft-start routines, and 3.0-3.6V CMOS operation simplifies isolation-interface design. Compared with analog controllers, the digital approach enables adaptive dead-time, burst mode, and PMBus-style telemetry firmware on the same silicon, reducing BOM count in server and telecom power bricks.
Recommended
Industrial Automation and Sensing
For factory automation nodes, the DSPIC33FJ128MC204T-I/ML pairs a 40 MIPS DSP core with two serial I/O ports for field-bus and sensor communication, making it a compact hub for smart sensors, actuators, and I/O modules. The 5 timers support capture/compare functions for encoder decoding and pulse measurement, and the advanced analog inputs digitize transducer signals processed with DSP filtering for noise immunity in electrically harsh environments. The industrial -40C to +85C temperature rating matches cabinet and machine-mount conditions, and DMA channels keep UART/SPI data flow deterministic under interrupt load. Its pin compatibility with the PIC24HJ family lets one PCB design serve both general-purpose and DSP-intensive product variants, reducing qualification effort across a product line.
Recommended
Digital Audio and Speech Processing
The dsPIC33F DSC line was explicitly designed for digital audio and speech processing, and the 128MC204T-I/ML fits codecs, active crossovers, echo cancellers, and effects units. At 40 MIPS with single-cycle MAC and hardware circular buffers, it runs FIR/IIR filter banks and sample-rate conversion in real time at 48 kHz stereo rates, while the DMA engine moves I2S-style audio data without CPU stalls. The 128KB Flash retains multiple presets and boot-time configuration, and 16KB SRAM buffers delay lines and coefficient tables. Its 3.3V operation interfaces directly with common audio ADC/DAC codecs over SPI. For battery-powered or cost-sensitive audio products, it replaces a separate DSP-plus-MCU two-chip solution with one 44-QFN device.
Recommended
Embedded Motion and Robotics
In robotics and embedded motion systems, the DSPIC33FJ128MC204T-I/ML coordinates multi-axis motion by combining quadrature-encoder capture (timers), current-loop FOC control (ADC + MC PWM), and host communication (serial ports) in a single 40 MIPS controller. Deterministic interrupt latency and the DSP's single-cycle MAC let position, velocity, and current loops run hierarchically without a co-processor. The 8 DMA channels service ADC and serial streams concurrently, essential for synchronized multi-axis sampling. Housed in a compact 8x8 mm QFN, it mounts directly on motor driver boards, and the -I grade covers typical workshop and mobile-robot environments. Firmware portability across the dsPIC33F/PIC24HJ pin-compatible families allows scaling I/O count without rewriting control code.
Recommended
Consumer Appliances with Motor Drive
Appliances such as fans, pumps, compressors, and power tools benefit from the DSPIC33FJ128MC204T-I/ML's sensorless BLDC control capability. The device runs sensorless observers (sliding-mode or back-EMF estimators) using its advanced analog front end and DSP throughput, eliminating Hall sensors and their wiring cost. The 128KB Flash supports application firmware plus OTA-style parameter update blocks, and five timers handle user-interface timing alongside the control loop. At 3.3V with an 8x8 mm QFN footprint, it integrates into compact appliance control boards next to the inverter stage. The extended-temperature E/ML variant in the same footprint is available for enclosed high-thermal designs, letting appliance makers qualify one PCB across standard and harsh thermal SKUs.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128MC204T-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128MC204T-E/ML | DSPIC33FJ128MC204T-H/ML | DSPIC33FJ64MC204T-I/ML | DSPIC33FJ128GP204 |
|---|---|---|---|---|---|
| Package | 44-QFN (8x8 mm, ML) | 44-QFN (8x8 mm) - same | 44-QFN (HVQCCN) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Performance | 40 MIPS, 16-bit | 40 MIPS, 16-bit | 40 MIPS, 16-bit | 40 MIPS, 16-bit | 40 MIPS, 16-bit |
| Flash Memory | 128 KB | 128 KB | 128 KB | 64 KB | 128 KB |
| Temperature Range | -40C to +85C (I) | -40C to +125C (E) | Automotive grade (H) | -40C to +85C (I) | -40C to +85C (I) |
| Peripheral Focus | Motor Control PWM + Advanced Analog | Motor Control PWM + Advanced Analog | Motor Control PWM + Advanced Analog | Motor Control PWM + Advanced Analog | General purpose / communication peripherals |
Key Differentiators
- Extended and automotive temperature options in the same footprint (vs DSPIC33FJ128MC204T-E/ML)
- Flash headroom for complex algorithms and field updates (vs DSPIC33FJ64MC204T-I/ML)
- Motor-control-optimized peripheral set (vs DSPIC33FJ128GP204)
Design Notes
The 44-QFN (8x8 mm, ML) package has an exposed die-attach pad that serves as the primary ground and thermal path. Create a solid ground island on the PCB top layer matching the pad outline, stitch it to internal ground planes with a 3x3 or larger via array, and connect all VSS pins to the same island. QFN paste printing on the pad should use segmented stencils (50-70% coverage) to avoid voiding and to prevent the package from floating during reflow.
Supply the device from a clean 3.0-3.6V rail (nominal 3.3V). Place 0.1uF ceramic decoupling capacitors at every VDD pin, as close to the pins as possible, plus one bulk 4.7-10uF capacitor near the device. ADC accuracy and PLL jitter are sensitive to supply ripple: if the rail comes from a switching converter, add an LC filter or ferrite bead between the converter and the MCU. Verify the onboard regulator dropout so the rail stays above 3.0V at worst-case load.
Three recurring pitfalls with dsPIC33FJ designs: (1) forgetting the MCLR pull-up (4.7k-10k to VDD) required for ICSP programming, which locks out debugging; (2) omitting the PGC/PGD programming pads on the PCB; (3) assuming Flash self-write works at all voltages - check the datasheet voltage constraints for erase/write operations before enabling field firmware updates. Also confirm the -I temperature grade suits your enclosure; use DSPIC33FJ128MC204T-E/ML for environments above +85C.
When using the motor-control PWM outputs to drive gate drivers, keep PWM traces short and route them away from analog inputs used for current sensing. Star-ground or partition the board so high-di/dt inverter returns do not cross the MCU ground island. Use the device's configurable peripheral pin selection (PPS) to place digital functions away from analog pins, and shield ADC sensor traces with ground guard traces for best noise performance in FOC current loops.
Compliance Information
RoHS compliant per Microchip standard product data. For automotive AEC-Q100 requirements, select the DSPIC33FJ128MC204T-H/ML variant. REACH and conflict minerals status should be confirmed via Microchip's official environmental compliance certificates.
