DSPIC33FJ128GP204T-I/PT - 16-bit DSC, 40 MIPS, 128KB Flash | Microchip
MPN: DSPIC33FJ128GP204T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.12 | $6.12 |
| 10 | $5.51 | $55.10 |
| 100 | $4.85 | $485.00 |
| 500 | $4.42 | $2,210.00 |
| 1,000 | $3.98 | $3,980.00 |
DSPIC33FJ128GP204T-I/PT Overview
A digital signal controller combines the control peripherals of a microcontroller (timers, UART, SPI, I2C, PWM) with the mathematical throughput of a DSP engine (single-cycle MAC, 40-bit accumulators, hardware divide). In the power-management hierarchy, a DSC sits between general-purpose MCUs and dedicated DSPs, making it the preferred choice for closed-loop control systems such as digital power supplies, motor drives, and sensor signal conditioning where both fast math and rich I/O are needed in one device.
Key features include the 40 MIPS 16-bit RISC core with nanoWatt power management, 128 KB Flash with self-programming capability, 8-channel DMA for peripheral-to-memory transfers without CPU intervention, and a 12-bit ADC with up to 500 ksps conversion rate. The GP (general purpose) variant emphasizes serial communications and analog acquisition, with UART, SPI, and I2C modules plus input capture/output compare channels suited to digital signal processing of external events.
Architecturally, the dsPIC33F core pairs two 40-bit wide accumulators with a 17-bit x 17-bit hardware multiplier, executing MAC operations in a single cycle. Instruction pipelining is transparent to the developer, and the modified Harvard bus structure allows simultaneous instruction fetch and data access. ECC-free Flash programming is managed by the on-chip NVM controller, and in-circuit serial programming (ICSP) is supported via the standard 5-wire interface.
Typical applications include motor control (BLDC, PMSM, ACIM), digital power conversion (PFC, LLC), audio processing, industrial sensing, and general embedded control requiring DSP-class math. The 44-TQFP package offers 35 usable I/O, fitting compact controller boards and PIM-based development systems such as the Microchip Explorer 16/32 Development Board.
When designing, budget the 3.0-3.6V supply rail early and use all VDD/VSS pairs with local 0.1 uF decoupling; the 10x10 TQFP thermal pad-less design relies on ground plane copper for heat spreading.
This page synthesizes distributor pricing, verified drop-in family alternatives, and practical design notes not found in the manufacturer datasheet or typical distributor listings.
Drop-in alternatives for DSPIC33FJ128GP204T-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 DSPIC33FJ128GP204T-I/PT (same form factor and footprint) — differing in Package, Timers, Core Architecture, Serial I/O Ports, Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128GP204-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.61 / Unit
View Datasheet →DSPIC33FJ128GP804-I/PT
✅ Drop-In✓ In Stock
$4.46 / Unit
View Datasheet →DSPIC33FJ64GP204-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ128MC204-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.2 / Unit
View Datasheet →DSPIC33FJ128GP204T-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128GP204T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F RISC with DSP engine |
| Maximum CPU Speed | 40 MIPS |
| Program Memory | 128 KB (128K x 8) Flash |
| RAM | 16 KB SRAM |
| DMA Channels | 8 |
| Supply Voltage | 3 V to 3.6 V (3.3 V nominal) |
| I/O Ports | 35 usable I/O (Newark listing); digchip lists 51 I/O - see validation note |
| Timers | 7 timers |
| Serial Interfaces | UART, SPI, I2C (3 serial I/O ports) |
| ADC | 10-bit / 12-bit ADC, advanced analog |
| Input Capture / Output Compare | Input capture and output compare channels |
| Package | 44-TQFP (10 x 10 mm), 0.8 mm pitch |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Technology | CMOS, nanoWatt power management |
| Programming | ICSP (In-Circuit Serial Programming) |
| Lifecycle Status | Active |
| Packing | Tape & Reel (T/R) |
DSPIC33FJ128GP204T-I/PT 44-tqfp (10 x 10 mm), 0.8 mm pitch Pin Configuration Guide
Pin configuration for DSPIC33FJ128GP204T-I/PT (44-tqfp (10 x 10 mm), 0.8 mm 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 DSPIC33FJ128GP204T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ128GP204T-I/PT is suitable for 6 applications: BLDC/PMSM Motor Control, Digital Power Conversion, Industrial Sensing and Data Acquisition, Audio Processing and Effects, Embedded Control and IoT Nodes, Automotive and Off-Highway Subsystems (non-safety).
BLDC/PMSM Motor Control
The DSPIC33FJ128GP204T-I/PT fits digital motor control because its 40 MIPS DSP core executes single-cycle 17x17 MAC operations required for field-oriented control (FOC) current loops running at 10-20 kHz PWM frequencies. The 8-channel DMA streams ADC current-sense samples into SRAM without CPU intervention, keeping loop latency deterministic. Input capture peripherals measure rotor position from hall sensors or encoder signals, while output compare channels generate complementary gate-drive waveforms. Placed at the center of the inverter board, it reads phase currents via the on-chip ADC and closes the FOC loop entirely in hardware-assisted firmware, achieving sub-microsecond interrupt response for overcurrent protection.
Recommended
Digital Power Conversion
Digital power supplies (PFC, LLC, buck) benefit from the DSPIC33FJ128GP204T-I/PT's combination of fast ADC, DMA-driven sampling, and DSP math. The controller samples output voltage and inductor current at 100-500 ksps using the advanced analog block, and the DMA controller cycles the ADC result buffer automatically each PWM period. Its 3.0-3.6V supply range matches standard controller rails, and the 44-TQFP 10x10 mm footprint fits densely packed power boards. The 128 KB Flash holds compensation tables and multiple operating modes (CCM, burst, standby) without external memory. Unlike analog-only controllers, firmware-based control allows tuning loop coefficients in production via ICSP firmware updates.
Recommended
Industrial Sensing and Data Acquisition
In industrial data acquisition nodes, the DSPIC33FJ128GP204T-I/PT digitizes sensor signals with its advanced analog ADC while UART, SPI, and I2C interfaces forward processed data to PLC backplanes or gateways. The 16 KB SRAM buffers waveform windows for FFT-based vibration analysis using the DSP engine's MAC instructions, and the 8 DMA channels sustain continuous acquisition without gaps. The 128 KB Flash stores calibration coefficients per channel and supports field firmware upgrades over the serial links. Operating from -40C to +85C (I grade), it mounts directly on DIN-rail or 4-20 mA transmitter boards in factory environments, reducing BOM by merging signal conditioning math and communications in one 3.3V device.
Recommended
Audio Processing and Effects
The dsPIC33F DSP engine makes the DSPIC33FJ128GP204T-I/PT a cost-effective audio DSP for effects units, mixing consoles, and speech systems. Single-cycle MAC operations with 40-bit accumulators implement biquad IIR filters and convolution without audible quantization error, while the ADC digitizes line-level inputs and the output compare/PWM block reconstructs analog output. UART and SPI handle user-interface communication (encoders, displays), and the 128 KB Flash stores multiple effect presets and coefficient tables. The GP-series serial-rich peripheral mix suits audio more than the MC-series PWM-heavy variant, and 3.3V operation simplifies integration with codec chips via I2S-adjacent SPI configurations.
Recommended
Embedded Control and IoT Nodes
General embedded control benefits from the DSPIC33FJ128GP204T-I/PT's nanoWatt power management: sleep and idle modes cut standby current for battery-backed nodes while the 40 MIPS active mode handles burst processing. The 35 usable I/O lines drive relays, LEDs, and communicate over UART/SPI/I2C, and 7 timers handle scheduling tasks natively. The 128 KB Flash accommodates protocol stacks and OTA-style field updates, while ICSP allows reprogramming in-circuit. The 44-TQFP 10x10 mm, 0.8 mm-pitch package is hand-solderable for prototyping yet suitable for reflow automation, making it a pragmatic bridge between 8-bit PIC18 controllers and 32-bit MCUs when DSP filtering of sensor data is required.
Recommended
Automotive and Off-Highway Subsystems (non-safety)
For non-safety-critical automotive subsystems such as pump controllers, actuator drivers, and sensor conditioning, the extended-temperature DSPIC33FJ128GP204T-E/PT variant (-40C to +125C) provides the identical 44-TQFP footprint and firmware compatibility as the I-grade part, letting one PCB serve both markets. The DSC's deterministic 40 MIPS core and DMA-driven ADC handle encoder and current feedback in electric pump and fan modules, while the 128 KB Flash stores fault logs and OEM calibration data. Designers should verify AEC-Q100 qualification status directly with Microchip for the specific ordering code before committing to automotive production programs.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128GP204T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128GP204-I/PT | DSPIC33FJ128GP804-I/PT | DSPIC33FJ64GP204-I/PT | DSPIC33FJ128MC204-I/PT | DSPIC33FJ128GP204T-E/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 |
| CPU Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Program Flash | 128 KB | 128 KB | 128 KB | 64 KB | 128 KB | 128 KB |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (E grade) |
| Peripheral Emphasis | General purpose: UART/SPI/I2C, ADC, capture/compare | General purpose (identical) | 80-series expanded analog/peripheral mix | General purpose (identical, less memory) | Motor control: high-speed PWM | General purpose (identical, E grade) |
| 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
- Full 128 KB Flash for large DSP algorithms (vs DSPIC33FJ64GP204-I/PT)
- General-purpose peripheral mix for serial-heavy designs (vs DSPIC33FJ128MC204-I/PT)
- Industrial temperature grade availability in same footprint (vs DSPIC33FJ128GP204T-E/PT)
- Tape-and-reel packing for automated assembly (vs DSPIC33FJ128GP204-I/PT)
Design Notes
The dsPIC33FJ family requires a strict 3.0-3.6V supply with all VDD/VSS pin pairs connected. Estimated: decouple each VDD pair with 0.1 uF ceramic placed within 2 mm of the pin, plus one 4.7-10 uF bulk capacitor per board. During Flash erase/write operations the core draws peak current; size the 3.3V regulator with at least 50% headroom above measured active current. Never let VDD exceed 3.6V - the family has no 5V-tolerant I/O, so level-shift any 5V signals.
The 44-TQFP 10x10 mm package has 0.8 mm pitch - use a standard QFP-44 land pattern per the manufacturer footprint and route decoupling capacitors on the bottom layer directly under the package with vias to the power/ground planes. Keep the oscillator (OSC1/OSC2) traces short and guard them from PWM or switching-node traces. Connect the programming pins (MCLR, PGD, PGC) to a 5-pin ICSP header; omitting this header forces full-board removal for rework.
Verify the 'T' (tape-and-reel) vs non-T ordering code at the BOM level - both are identical silicon, but mixing reel and tray codes confuses pick-and-place programming. Confirm peripheral compatibility before substituting GP vs MC vs GP804 variants: the MC204 replaces general-purpose peripherals with high-speed PWM, so GP firmware will not run unchanged. Also confirm the correct temperature grade (I vs E) for your ambient environment; the E-grade part is the safe default above 70C ambient.
Compliance Information
Standard Microchip production parts are supplied lead-free and RoHS-compliant; REACH, halogen-free, and conflict-minerals status were not stated in the provided data - confirm via Microchip product page compliance documents.
