DSPIC33FJ128MC204-I/PT - 16-bit DSC 40MIPS 128KB | Microchip
MPN: DSPIC33FJ128MC204-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.9 | $29.00 |
| 100 | $2.64 | $264.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.2 | $2,200.00 |
DSPIC33FJ128MC204-I/PT Overview
A digital signal controller combines the computational throughput of a digital signal processor (DSP) with the peripheral set and ease of use of a microcontroller (MCU). Within the power-management hierarchy of embedded systems, the dsPIC33F family sits alongside Microchip's PIC24HJ 16-bit MCU family - in fact, the two families are pin compatible, and both share a high degree of compatibility with the older dsPIC30F family, enabling seamless migration between PIC24F, dsPIC30F, and dsPIC33F devices.
Key features include a modified Harvard 16-bit architecture with DSP engine (17-bit x 17-bit single-cycle MAC, dual operand fetch), 8-channel DMA, 7 timers, and 2 serial I/O ports. The motor-control peripheral set (PWM with dead-time insertion, ADC with simultaneous sampling) targets precision motion applications. Supply voltage range is 3.0V to 3.6V with a maximum supply current of 76 mA.
Architecturally, the dsPIC33F core executes most instructions in a single cycle and supports the MAC instruction class that concurrently fetches two data operands from memory while multiplying two W registers and accumulating - optionally saturating - the result in the same cycle, per the Microchip family datasheet (document 70291G).
Typical applications include brushless DC and PMSM motor control (FOC sensorless algorithms), digital power supplies (LLC, totem-pole PFC), audio processing, and industrial sensing. The advanced analog and PWM peripherals make it especially effective in closed-loop power electronics.
Design consideration: the 3.0-3.6V rail requires an LDO from typical 5V or 24V industrial buses; use any PGECx/PGEDx pair consistently for ICSP programming and debugging.
This page synthesizes distributor pricing (LCSC from $2.6361), drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ128MC204-I/PT — 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/PT (same form factor and footprint) — differing in Package, Timers, Operating Temperature, ADC, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ64MC204-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32MC204-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128MC804-I/PT
✅ Drop-In✓ In Stock
$4.25 / Unit
View Datasheet →DSPIC33FJ128MC204T-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128MC204T-I/PT
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →DSPIC33FJ128MC204-I/PT Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F 16-bit DSC |
| Max Clock Speed | 40 MHz |
| Performance | 40 MIPS |
| Program Memory Size | 128 KB Flash |
| SRAM | 8 KB (8192 words) |
| Supply Voltage Range | 3 V to 3.6 V |
| Max Supply Current | 76 mA |
| DMA Channels | 8 |
| Timers | 7 |
| Serial I/O Ports | 2 |
| I/O Ports | 21 |
| Special Peripherals | Motor Control PWM, Advanced Analog |
| Package | 44-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Technology | CMOS |
| Operating Temperature | -40C to +85C (I grade) |
| Programming Interface | ICSP (PGECx/PGEDx pairs) |
| RoHS Status | Compliant |
| Lifecycle Stage | Active |
DSPIC33FJ128MC204-I/PT 44-tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for DSPIC33FJ128MC204-I/PT (44-tqfp (10x10 mm) 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 DSPIC33FJ128MC204-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ128MC204-I/PT is suitable for 6 applications: Brushless DC / PMSM Motor Control, Digital Power Supplies (LLC / Totem-Pole PFC), Industrial Automation and Sensing Nodes, Audio Signal Processing, Electric Mobility and E-bike Controllers, Robotics and Servo Drives.
Brushless DC / PMSM Motor Control
The DSPIC33FJ128MC204-I/PT is purpose-built for precision motor control: its 40 MIPS DSP engine executes field-oriented control (FOC) loops fast enough for multi-kHz current-loop bandwidth, and the dedicated Motor Control PWM module generates complementary outputs with hardware dead-time insertion for three-phase inverters. The advanced analog front end supports simultaneous current and position sampling, critical for sensorless algorithms such as sliding-mode observers. In a typical BLDC/PMSM drive, the DSC runs the FOC computation in a fixed interrupt period while the PWM module updates duty cycles each cycle, with the 8-channel DMA moving ADC results without CPU intervention. Compared to a general-purpose MCU, the single-cycle 17x17-bit MAC reduces control-loop execution time, leaving headroom for communication and protection routines on the same 128 KB Flash.
Recommended
Digital Power Supplies (LLC / Totem-Pole PFC)
Switching power converters benefit from the DSPIC33FJ128MC204-I/PT's deterministic 40 MIPS core and high-resolution PWM for phase management. In an LLC resonant converter, the DSC modulates switching frequency and burst-mode control in firmware, while in a totem-pole PFC the motor-control PWM handles complementary high/low-side switching with dead-time control. The 7-timer set provides synchronized time bases so ADC current sampling lands precisely at mid-PWM-cycle, minimizing switching-noise corruption of current feedback. The 3.0-3.6V supply and 76 mA consumption keep controller power draw negligible relative to multi-hundred-watt converter output. The 128 KB Flash accommodates full digital control laws plus power-metering and fault-logging firmware, and the 8 DMA channels offload telemetry streams so the CPU core remains dedicated to the fast control loop.
Recommended
Industrial Automation and Sensing Nodes
Industrial sensor nodes and actuators use the DSPIC33FJ128MC204-I/PT where DSP-class filtering (IIR/FIR on vibration, current, or pressure signals) must coexist with real-time actuator control. Its 40 MIPS core executes fixed-point FFT and filter kernels efficiently via the DSP MAC engine, while 2 serial I/O ports support RS-485/Modbus and CAN-style field communication. The 21 I/O ports, 7 timers, and -40C to +85C industrial rating suit factory-floor environments, and the 3.0-3.6V rail simplifies interfacing with 3.3V ADCs and transceiver ICs. The 128 KB Flash allows OTA-style field-updatable firmware with dual-image storage, and the 8 KB SRAM buffers signal-processing workloads. Pin compatibility with PIC24HJ devices lets engineers migrate between general-purpose MCU and DSP feature sets without PCB respins.
Recommended
Audio Signal Processing
Embedded audio applications - DSP effects, active crossovers, power-amplifier protection - leverage the DSPIC33FJ128MC204-I/PT's single-cycle MAC and dual-operand fetch to execute biquad filters and limiters at 40 MIPS. The 8 KB SRAM holds delay lines and coefficient sets for multi-band processing, while the 8 DMA channels stream I2S-class sample data from external codecs without CPU overhead. Fixed-point arithmetic on the dsPIC33F core avoids the cost of a general-purpose DSP while retaining the development convenience of a Microchip MCU toolchain. The 3.0-3.6V operation matches common codec analog rails, and the 128 KB Flash stores presets and updateable DSP firmware. Compared with larger dsPIC33 variants, this 44-pin part fits compact amplifier boards where PCB area, not channel count, is the constraint.
Recommended
Electric Mobility and E-bike Controllers
E-bike, scooter, and light-EV traction controllers combine motor control and battery management - exactly the DSPIC33FJ128MC204-I/PT's strengths. The Motor Control PWM drives the three-phase inverter for the hub or mid-drive motor, while the advanced analog inputs monitor phase currents and battery voltage/current for coulomb-counting. The 40 MIPS DSP core runs FOC or six-step commutation plus state-of-charge estimation concurrently within the 128 KB Flash image. The -40C to +85C I-grade package tolerates outdoor vehicle environments, and the 3.3V rail interfaces cleanly with hall sensors and throttle potentiometers scaled through dividers. For hotter enclosures, the DSPIC33FJ128MC204T-E/PT variant extends rating to +125C on the same footprint. The 7 timers and 8 DMA channels handle braking, lighting, and communication tasks in parallel with the traction control loop.
Recommended
Robotics and Servo Drives
Multi-axis robotics and smart servo drives exploit the DSPIC33FJ128MC204-I/PT's combination of DSP throughput and motor-control peripherals in a compact 44-TQFP. Each DSC can close the current loop and position loop for one axis at 40 MIPS using FOC on brushless servos or PID on brushed DC motors, cascaded across axes via the serial ports. The advanced analog inputs read encoders, potentiometers, and current shunts; the PWM outputs drive H-bridges or three-phase stages with dead-time protection. The 128 KB Flash holds trajectory planning, comms, and control firmware together, and pin compatibility with the dsPIC33F/PIC24HJ 44-pin family gives robot OEMs a single PCB design scalable from 32 KB to 128 KB firmware images across product tiers, reducing qualification cost.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128MC204-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ64MC204-I/PT | DSPIC33FJ32MC204-I/PT | DSPIC33FJ128MC804-I/PT | DSPIC33FJ128MC204T-E/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Flash Program Memory | 128 KB | 64 KB | 32 KB | 128 KB | 128 KB |
| SRAM | 8 KB (8192 words) | 8 KB | 8 KB | 8 KB | 8 KB |
| Max Clock / Performance | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS |
| 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 | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (I) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (E) |
| Peripheral Focus | Motor Control PWM, Advanced Analog | Motor Control PWM (same) | Motor Control PWM (same) | Different analog/peripheral mix | Motor Control PWM (same) |
Key Differentiators
- Maximum program memory in 44-pin MC204 family (vs DSPIC33FJ64MC204-I/PT)
- Motor-control peripheral specialization (vs DSPIC33FJ128MC804-I/PT)
- Industrial temperature at standard cost (vs DSPIC33FJ128MC204T-E/PT)
Design Notes
Generate the 3.3V rail (3.0-3.6V range) with a dedicated LDO rated at least 200 mA - the core alone can draw up to 76 mA, and I/O drive plus PWM gate-buffer loads add on top. Place a 0.1uF ceramic capacitor at every VDD pin and one 10uF bulk capacitor per device. Decouple VDDCORE per the Microchip family datasheet (70291G) requirements; omitting the core capacitor is a common bring-up failure. Never power the DSC from the same unfiltered rail as motor drivers - back-EMF spikes on shared rails cause spurious resets.
ICSP programming requires a matched PGECx/PGEDx pair: if PGEC2 carries ICSPCLK, ICSPDAT must connect to PGED2 - mismatched pairs are the most frequent programming failure. Connect ALL VSS and VDD pins during programming and operation, not just the pins near your debug header. Reserve header access to at least one PGEC/PGED pair and MCLR on the production PCB. Also note that aggregated datasheet listings (e.g., digchip showing QFN-28) can mix package data across family members - the /PT suffix always means the 44-TQFP.
Keep the ADC sampling points synchronized to the PWM center (mid-duty-cycle) using the synchronized time bases from the 7-timer set; sampling during switching transitions injects noise into current-feedback channels. Route analog inputs away from PWM traces, and use a star ground separating power-stage returns from DSC ground. For motor-control layouts, the exposed trace routing of PWM outputs to gate drivers should be short and, where possible, paired with ground returns to limit radiated EMI from the 40 MHz system clock and fast PWM edges.
Estimated: at VDD = 3.6V and maximum supply current of 76 mA, worst-case device power dissipation is approximately 0.27 W (3.6 V x 0.076 A), plus I/O pin currents. A 44-TQFP (10x10) on a standard 2-layer PCB with typical copper keeps the junction temperature rise modest (order of 30-40 C/W theta-JA for this package class - confirm the exact value in the datasheet section 1 thermal table). Only in extended-temperature (E-grade, +125C) or high-ambient enclosure designs does copper pouring become necessary.
Compliance Information
RoHS-compliant, lead-free TQFP per Microchip /PT suffix convention. Microchip states its products meet the specifications in their applicable data sheets. Formal REACH and conflict-minerals declarations available via the Microchip product page.
