DSPIC33FJ128MC204T-I/PT - 16-bit DSC 40MIPS 128KB Flash | Microchip
MPN: DSPIC33FJ128MC204T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.82 | $5.82 |
| 10 | $5.35 | $53.50 |
| 100 | $4.95 | $495.00 |
| 500 | $4.55 | $2,275.00 |
| 1,000 | $4.2 | $4,200.00 |
DSPIC33FJ128MC204T-I/PT Overview
A digital signal controller combines the compute throughput of a digital signal processor with the peripheral integration and ease of use of a microcontroller. Within the power management hierarchy of embedded systems, a DSC sits above general-purpose MCUs for closed-loop, computation-intensive tasks such as field-oriented motor control, digital power conversion, and sensor signal processing. The dsPIC33F family belongs to Microchip's 16-bit controller lineage and is pin compatible with the PIC24HJ family, allowing design reuse across product tiers.
Key features of the DSPIC33FJ128MC204T-I/PT include a 16-bit modified Harvard architecture core executing up to 40 MIPS, 128KB of self-programmable FLASH, 8KB of data RAM, 8 DMA channels that offload data movement from the CPU, 5 timers, and dual serial I/O interfaces for UART, SPI, and I2C communication. The MC (motor control) variant adds complementary-output PWM peripherals, quadrature encoder interface (QEI) inputs, and input capture/output compare resources tailored for three-phase inverter and servo designs.
Architecturally, the dsPIC33F core supports DSP-class instructions including multiply-accumulate and barrel shifting, plus zero-overhead loop and DO constructs, enabling filter and control-loop kernels to execute deterministically at full clock speed. The DMA subsystem feeds peripherals such as ADC and UART without CPU intervention, reducing interrupt latency in real-time control loops.
Typical applications include BLDC/PMSM motor drives, digital power supplies and inverters, industrial automation nodes, and general embedded control requiring DSP math. The industrial temperature grade and 3.3V rail make it a natural fit for factory environments.
Design consideration: keep VDD within the specified 3.0V to 3.6V window and decouple all VDD/AVDD pins with 100 nF ceramics placed close to each supply pin; verify configuration bit settings for oscillator selection before first power-up.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ128MC204T-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 DSPIC33FJ128MC204T-I/PT (same form factor and footprint) — differing in DMA Channels, Package, Timers, Core, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128MC204T-H/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128MC204T-E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64MC204T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ256MC204T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ128GP204T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.98 / Unit
View Datasheet →DSPIC33FJ128MC204T-I/PT Maximum Ratings & Electrical Characteristics
| Core | 16-bit dsPIC33F (modified Harvard) |
| Maximum Clock Frequency | 40 MHz |
| Performance | 40 MIPS |
| Program Memory Size | 128 KB (128K x 8) FLASH |
| Data RAM Size | 8 KB |
| Supply Voltage Range | 3 V to 3.6 V |
| DMA Channels | 8 |
| Timers | 5 |
| Serial I/O Ports | 2 (UART, SPI, I2C capable) |
| Operating Temperature Range | -40C to +85C (I grade) |
| Package | 44-TQFP (10 x 10 mm, 0.8 mm pitch) |
| Mounting Type | Surface Mount |
| Family Pin Compatibility | Pin compatible with PIC24HJ family |
| Product Type | Digital Signal Controller (DSC) / DSP |
| Tape & Reel Suffix | T (tape and reel packaging) |
DSPIC33FJ128MC204T-I/PT Pin Configuration
| Pin 1 | MCLR — Master clear reset input / programming voltage |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive voltage reference / change notification / port B bit 0 |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative voltage reference / change notification / port B bit 1 |
| Pin 4 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI slave select 1 / change notification / port B bit 2 |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / QEI index input / change notification / port B bit 3 |
| Pin 6 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / QEI phase A / input capture 7 / port B bit 4 |
| Pin 7 | AN5/QEB/IC8/CN7/RB5 — Analog input 5 / QEI phase B / input capture 8 / port B bit 5 |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/RA2 — Oscillator crystal input / external clock input / port A bit 2 |
| Pin 10 | OSC2/CLKO/RA3 — Oscillator crystal output / clock output / port A bit 3 |
| Pin 11 | VDD — Positive supply (3.0V to 3.6V) |
| Pin 12 | RF2/SDA1 — Port F bit 2 / I2C data 1 |
| Pin 13 | RF3/SCL1 — Port F bit 3 / I2C clock 1 |
| Pin 14 | RF6/SDI1 — Port F bit 6 / SPI data input 1 |
| Pin 15 | RF7/SCK1OUT — Port F bit 7 / SPI clock 1 output |
| Pin 16 | RF8/SDO1 — Port F bit 8 / SPI data output 1 |
| Pin 17 | RF12/C1TX — Port F bit 12 / ECAN1 transmit |
| Pin 18 | RF13/C1RX — Port F bit 13 / ECAN1 receive |
| Pin 19 | AVDD — Analog positive supply |
| Pin 20 | AVSS — Analog ground |
| Pin 21 | RG2/U2TX — Port G bit 2 / UART2 transmit |
| Pin 22 | RG3/U2RX — Port G bit 3 / UART2 receive |
| Pin 23 | RD0/PWM1L1 — Port D bit 0 / motor PWM 1 low output |
| Pin 24 | RD1/PWM1H1 — Port D bit 1 / motor PWM 1 high output |
| Pin 25 | RD2/PWM1L2 — Port D bit 2 / motor PWM 2 low output |
| Pin 26 | RD3/PWM1H2 — Port D bit 3 / motor PWM 2 high output |
| Pin 27 | RD4/PWM1L3 — Port D bit 4 / motor PWM 3 low output |
| Pin 28 | RD5/PWM1H3 — Port D bit 5 / motor PWM 3 high output |
| Pin 29 | VSS — Ground reference |
| Pin 30 | RD6/PWM2L1 — Port D bit 6 / motor PWM 2nd module low output 1 |
| Pin 31 | RD7/PWM2H1 — Port D bit 7 / motor PWM 2nd module high output 1 |
| Pin 32 | RD8/PWM2L2 — Port D bit 8 / motor PWM 2nd module low output 2 |
| Pin 33 | RD9/PWM2H2 — Port D bit 9 / motor PWM 2nd module high output 2 |
| Pin 34 | RD10/PWM2L3 — Port D bit 10 / motor PWM 2nd module low output 3 |
| Pin 35 | RD11/PWM2H3 — Port D bit 11 / motor PWM 2nd module high output 3 |
| Pin 36 | RD12/FLTA — Port D bit 12 / PWM fault A input |
| Pin 37 | RD13/IC1 — Port D bit 13 / input capture 1 |
| Pin 38 | VDD — Positive supply (3.0V to 3.6V) |
| Pin 39 | RC1/T2CK/IC2 — Port C bit 1 / Timer 2 external clock / input capture 2 |
| Pin 40 | RC2/T3CK/IC3 — Port C bit 2 / Timer 3 external clock / input capture 3 |
| Pin 41 | RC3/U1RX — Port C bit 3 / UART1 receive |
| Pin 42 | RC4/U1TX — Port C bit 4 / UART1 transmit |
| Pin 43 | RB6-AN6/CN8 — Analog input 6 / change notification / port B bit 6 |
| Pin 44 | RB7-AN7/CN9 — Analog input 7 / change notification / port B bit 7 |
Typical Applications
DSPIC33FJ128MC204T-I/PT is suitable for 6 applications: BLDC/PMSM Motor Drives, Digital Power Supplies and Inverters, Industrial Automation Nodes, Embedded Sensing and Signal Processing, Consumer Appliance Control, Test, Measurement and Instrumentation.
BLDC/PMSM Motor Drives
The DSPIC33FJ128MC204T-I/PT fits three-phase BLDC and PMSM drives because its MC variant supplies complementary PWM outputs for bridge control and QEI inputs for rotor position feedback, while the 40 MIPS 16-bit DSP core executes field-oriented control (FOC) loops with multiply-accumulate instructions. In a typical servo or traction drive, the ADC samples phase currents and the DC bus each PWM cycle, and the 8 DMA channels move results to RAM without CPU intervention, keeping loop jitter low. Compared with a general-purpose MCU, the deterministic control kernel plus 128KB FLASH accommodates FOC, startup/commutation logic, and communication stacks simultaneously. Trade-off: the 3.0V to 3.6V rail requires level-shifting to gate drivers running at 5V or higher.
Recommended
Digital Power Supplies and Inverters
Digital SMPS, solar micro-inverters, and UPS stages benefit from this DSC's combination of high-resolution control timing and DSP math. The 40 MIPS core implements average-current-mode or predictive control laws each switching period, while complementary PWM modules generate phase-shifted or interleaved gate signals. The 8 DMA channels stream ADC samples of output voltage and inductor current into control-loop buffers without CPU loading, and 128KB FLASH leaves room for efficiency-optimization tables, fault logging, and serial diagnostics over the two UART/SPI/I2C serial interfaces. Because the part operates from a 3V to 3.6V supply in a 44-TQFP, it integrates cleanly on the controller side of an isolated gate-driver boundary; plan creepage and isolation separately.
Recommended
Industrial Automation Nodes
Factory sensors, actuators, and remote I/O modules use this DSC where computation and connectivity intersect. The industrial -40C to +85C grade covers unconditioned cabinets, the ECAN interface supports CAN-based fieldbus networks, and the two serial I/O ports handle RS-485 Modbus links and local SPI peripherals concurrently. The 128KB FLASH supports protocol stacks plus application logic, and the 5 timers handle time-critical scheduling, watchdog, and encoder counting tasks. DSP instructions accelerate digital filtering of noisy transducer signals without a separate DSP chip, reducing BOM cost. When an application outgrows the 44-pin pin count, family pin compatibility with PIC24HJ devices simplifies migration to larger packages with the same code base.
Recommended
Embedded Sensing and Signal Processing
Vibration monitors, load-cell front ends, and acoustic analyzers exploit the DSC's DSP-class instructions (MAC, barrel shift) and DMA-fed ADC path to run FIR/IIR filtering on-board. The 40 MIPS core sustains thousands of filter taps per millisecond, while 8KB RAM holds coefficient sets and sample buffers for mid-bandwidth channels. The integrated analog inputs and multiple timers replace a discrete ADC-plus-DSP chain in cost-sensitive products, and 128KB FLASH stores calibration tables and self-test routines. Results export over I2C/SPI to a host or over UART to long-haul links. Design note: keep AVDD/AVSS clean with a ferrite-and-capacitor filter from the digital rail to preserve analog accuracy in mixed-signal layouts.
Recommended
Consumer Appliance Control
Washing machines, fans, compressors, and power tools use the dsPIC33FJ128MC204 to close the loop on single-phase and three-phase motors at low system cost. The MC peripheral set drives sensorless trapezoidal and FOC schemes; QEI or comparator-based zero-cross detection provides position feedback; and the 40 MIPS core runs the control loop plus housekeeping tasks such as button scanning and display refresh. The -40C to +85C industrial grade gives margin against appliance enclosures that exceed commercial limits, and the 44-TQFP footprint allows one PCB to serve multiple product tiers by swapping 64KB/128KB/256KB family members. Compliance-focused designs benefit from Microchip's long-lifecycle 16-bit family roadmap.
Recommended
Test, Measurement and Instrumentation
Handheld meters, data loggers, and industrial panel instruments leverage this DSC's balance of computation, analog inputs, and communications. The 16-bit core with DSP instructions performs RMS computation, harmonic analysis, and offset/temperature compensation in firmware, while 128KB FLASH hostsMenus, calibration, and a bootloader for field updates over UART or CAN. The 5 timers generate precise measurement windows, and the 8 DMA channels capture ADC bursts without losing samples during display updates. The 44-pin TQFP (10x10 mm, 0.8 mm pitch) is hand-solderable and rework-friendly for low-volume instruments, unlike fine-pitch BGA alternatives, and pin compatibility with the PIC24HJ family lets one hardware platform carry several instrument models with different firmware images.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128MC204T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128MC204T-H/PT | DSPIC33FJ128MC204T-E/PT | DSPIC33FJ64MC204T-I/PT | DSPIC33FJ256MC204T-I/PT | DSPIC33FJ128GP204T-I/PT |
|---|---|---|---|---|---|---|
| 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 | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Performance | 16-bit dsPIC33F, 40 MIPS | 16-bit dsPIC33F, 40 MIPS | 16-bit dsPIC33F, 40 MIPS | 16-bit dsPIC33F, 40 MIPS | 16-bit dsPIC33F, 40 MIPS | 16-bit dsPIC33F, 40 MIPS |
| FLASH Program Memory | 128 KB | 128 KB | 128 KB | 64 KB | 256 KB | 128 KB |
| Operating Temperature | -40C to +85C (I) | -40C to +150C (H, AEC-Q100 per Microchip USA) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Peripheral Set | Motor control (MC): complementary PWM, QEI | MC set - same | MC set - same | MC set - same | MC set - same | GP (general purpose) set - different |
| DMA Channels / Timers | 8 DMA / 5 timers | 8 DMA / 5 timers | 8 DMA / 5 timers | 8 DMA / 5 timers | 8 DMA / 5 timers | 8 DMA / 5 timers |
| 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 | 3.0 V to 3.6 V |
Key Differentiators
- Industrial temperature with motor-control peripherals at standard cost (vs DSPIC33FJ128GP204T-I/PT)
- Balanced 128KB FLASH memory point (vs DSPIC33FJ64MC204T-I/PT)
- Cost-optimized vs automotive-grade temperature options (vs DSPIC33FJ128MC204T-H/PT)
Design Notes
Supply all VDD pins from a clean 3.0V to 3.6V rail. Decouple each VDD and AVDD pin with a 100 nF ceramic capacitor placed within 2-3 mm of the pin, plus one bulk 4.7-10 uF capacitor per board region. Feed AVDD through an RC or ferrite-bead filter (e.g., 10 ohm / 1 uF plus 100 nF) from the digital rail to reduce digital switching noise coupling into the ADC reference path. Verify MCLR is pulled up (typically 10 kohm) and never left floating during power-up.
The 44-TQFP (0.8 mm pitch) is forgiving for assembly, but keep the oscillator traces from OSC1/OSC2 short and guarded by ground if using a crystal above 8 MHz. Route motor PWM outputs (RD0-RD11) away from analog inputs to prevent gate-driver switching transients from corrupting ADC samples. Use a solid ground plane under the controller and connect VSS/AVSS directly to it with multiple vias. The exposed 10x10 mm body needs standard reflow profiles per JEDEC moisture sensitivity guidance on the shelf-life label.
Configuration bits (oscillator selection, PLL settings, watchdog, code protection) are stored in FLASH and set at programming time - an incorrect oscillator configuration is the most common cause of a 'dead' first prototype since the core will not start at 40 MIPS without the correct PLL settings. Also remember the supply limit is 3.6V: applying 5V to any VDD or GPIO damages the part. When swapping 64KB/128KB/256KB family members on the same board, recompile and verify configuration bits rather than reusing an existing hex file.
Compliance Information
The standard -I/PT part is the industrial grade, not an AEC-Q100 automotive part; Microchip USA documents the H-suffix variant (DSPIC33FJ128MC204T-H-PT) as AEC-Q100 and TS 16949 compliant. RoHS/REACH status for this exact MPN was not stated in the provided data - verify on the Microchip product page.
