DSPIC33FJ128GP204-I/PT - 16-bit DSC 40MIPS 128KB Flash | Microchip
MPN: DSPIC33FJ128GP204-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.92 | $6.92 |
| 10 | $6.25 | $62.50 |
| 100 | $5.58 | $558.00 |
| 500 | $5.05 | $2,525.00 |
| 1,000 | $4.61 | $4,610.00 |
DSPIC33FJ128GP204-I/PT Overview
A Digital Signal Controller combines the control peripherals of a microcontroller with the multiply-accumulate computation speed of a DSP. In the power-management hierarchy, the DSC sits above a general-purpose MCU for math-intensive real-time control: it executes DSP-class instructions (MAC, DSP engine with two 40-bit accumulators) while retaining MCU-class peripherals such as UART, SPI, I2C, timers, PWM and ADC. The dsPIC33FJ family from Microchip Technology is one of the most widely deployed 16-bit DSC platforms in motor control, digital power and sensor-signal processing.
Key features of this part include the 128 KB self-programming Flash with 8 KB of RAM, a dedicated 8-channel DMA controller that offloads data transfers from the CPU, and 3 serial I/O ports for versatile communication. The device also integrates 7 timers and 3 external interrupt inputs, supporting deterministic multi-task real-time firmware.
Architecturally, the CMOS dsPIC33FJ core pairs a 16-bit pipelined RISC engine with a hardware DSP engine, allowing single-cycle MAC operations. The wide operating voltage of 3.3V and industrial temperature grade (-I suffix, -40C to +85C) make it suitable for harsh embedded environments. Per the Microchip family datasheet (document 70292G), the GP204 variant of the dsPIC33FJ128GPX02/X04 family shares pinout diagrams, device naming and peripheral allocation across the family, simplifying memory-size migration.
Typical applications include digital power supplies and power-factor-correction converters, sensor signal processing in industrial automation, and motor control (BLDC/PMSM) drives where the DMA channels stream ADC results without CPU intervention.
Design consideration: connect all VDD/VSS pairs and fit the internal regulator VCAP capacitor exactly as shown in the family datasheet; ICSP programming requires a matched PGECx/PGEDx pair.
This page adds value beyond the datasheet by synthesizing distributor inventory sources, drop-in alternatives, and application-specific design notes in one AI-citable reference.
Drop-in alternatives for DSPIC33FJ128GP204-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 DSPIC33FJ128GP204-I/PT (same form factor and footprint) — differing in Package, Timers, Operating Temperature, Supply Voltage, Packaging.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128GP204T-I/PT
✅ Drop-In✓ In Stock
$3.98 / Unit
View Datasheet →DSPIC33FJ64GP204-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GP204-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64MC204-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EV64GM004T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.8 / Unit
View Datasheet →DSPIC33EP64GP504T-E/TL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.5 / Unit
View Datasheet →DSPIC33FJ128GP204-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F RISC with DSP engine |
| Maximum Clock Frequency | 40 MHz |
| Performance | 40 MIPS |
| Program Memory (Flash) | 128 KB |
| RAM | 8 KB |
| DMA Channels | 8 |
| Serial I/O Ports | 3 |
| Timers | 7 |
| External Interrupt Inputs | 3 |
| Supply Voltage | 3.3 V |
| Technology | CMOS |
| Package | 44-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Temperature Grade | -40C to +85C (I grade) |
| Packaging | Tray |
| Programming/Debug | ICSP via PGECx/PGEDx pairs |
DSPIC33FJ128GP204-I/PT 44-pin tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for DSPIC33FJ128GP204-I/PT (44-pin 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 DSPIC33FJ128GP204-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ128GP204-I/PT is suitable for 6 applications: Digital Power Supplies, Motor Control Drives, Sensor Signal Processing, Industrial Automation Controllers, Audio and Speech Processing, Battery-Powered Portable Instruments.
Digital Power Supplies
The DSPIC33FJ128GP204-I/PT is widely used in digital power supplies, PFC stages and DC-DC converters because its 40 MIPS core closes current-mode control loops in the tens-of-kilohertz range with headroom. The 8-channel DMA streams ADC conversion results into RAM without CPU intervention, reducing loop latency and jitter, while the 128 KB Flash holds compensation, protection and communication firmware together. Deployed between the sensing front end and the PWM gate drivers, it replaces analog compensation networks with firmware-tunable control. Unlike fixed-function controllers, coefficients and protection thresholds update in the field, and the -40C to +85C industrial grade suits power electronics in enclosed environments.
Recommended
Motor Control Drives
Sensorless BLDC and PMSM drives benefit directly from this DSC's architecture: the 40 MHz, 40 MIPS core executes field-oriented-control math including single-cycle MAC operations via the DSP engine, while the 8-channel DMA services ADC current-sense sampling and PWM update timing deterministically. With 7 timers available, one device schedules multiple PWM channels, tach capture and watchdog functions without external logic. The 3 serial I/O ports link the drive to industrial fieldbuses or configuration terminals. Note that the GP-series peripheral set suits general control; designs needing the motor-control-specific PWM peripherals should compare the pin-compatible MC-series variant in the same 44-pin TQFP footprint.
Recommended
Sensor Signal Processing
In industrial sensor nodes, the DSPIC33FJ128GP204-I/PT performs the filtering, calibration and decision logic that raw MCUs cannot: the hardware DSP engine executes FIR/IIR filtering with two 40-bit accumulators, and the 128 KB Flash accommodates multi-point calibration tables plus communication stacks. The 3 external interrupt inputs give deterministic response to threshold events, and 3 serial ports connect ADCs, displays and hosts simultaneously. Operating from a single 3.3 V rail with a -40C to +85C rating, the part integrates the complete signal chain from conditioned analog input to digital output, cutting board area and bill-of-materials count versus discrete DSP-plus-MCU two-chip solutions.
Recommended
Industrial Automation Controllers
As a general 16-bit embedded controller, this DSC suits PLC I/O modules, HMI nodes and small automation controllers. The 7 timers sequence machine states, the 8 DMA channels keep high-rate I/O transfers off the CPU, and 128 KB of Flash retains multiple communication protocols and recipes on one device. The 3 serial I/O ports simultaneously serve Modbus RTU, SPI peripherals and a debug console, while the 3 external interrupts capture encoder or limit-switch events with deterministic latency. The 44-pin TQFP's generous general-purpose I/O, industrial temperature grade, and ICSP field-programmability through any matched PGECx/PGEDx pair make production updates straightforward on installed equipment.
Recommended
Audio and Speech Processing
The GP-series dsPIC33FJ devices are Microchip's designated audio-capable family: the DSP engine with dual 40-bit accumulators and single-cycle MAC supports sample-rate processing for audio effects, speech recognition front ends and acoustic sensing. The 128 KB Flash buffers codecs, filters and protocol firmware concurrently, and the 8-channel DMA sustains continuous audio streaming without CPU intervention. At 40 MIPS the core comfortably processes multiple channels at standard audio sample rates while managing the user interface. The single-supply 3.3 V operation simplifies integration with codec ICs, and the industrial temperature range allows deployment in commercial AV equipment and voice-interactive industrial terminals alike.
Recommended
Battery-Powered Portable Instruments
Handheld measurement and portable test instruments use this DSC where computation and efficiency must coexist: the CMOS 3.3 V core at 40 MHz delivers DSP-grade throughput for FFT-based measurement, while power-managed operating modes allow the CPU to sleep between samples. The 128 KB Flash stores multi-language UIs, calibration data and logging, and the 3 serial ports connect displays, storage and PC links concurrently. Surface-mount 44-pin TQFP packaging fits compact two-layer boards, and ICSP programming enables final-test firmware flashing on the production line. The -40C to +85C rating covers outdoor and automotive-serviceable instruments where consumer-grade parts would be marginal over temperature extremes.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128GP204-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128GP204T-I/PT | DSPIC33FJ64GP204-I/PT | DSPIC33FJ32GP204-I/PT | DSPIC33FJ64MC204-I/PT |
|---|---|---|---|---|---|
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 128 KB | 128 KB | 64 KB | 32 KB | 64 KB |
| Performance | 40 MIPS at 40 MHz | 40 MIPS at 40 MHz | 40 MIPS at 40 MHz | 40 MIPS at 40 MHz | 40 MIPS at 40 MHz |
| DMA Channels | 8 | 8 | 8 | 8 | 8 |
| Peripheral Focus | General-purpose DSP (GP series) | General-purpose DSP (GP) | General-purpose DSP (GP) | General-purpose DSP (GP) | Motor control (MC series) |
| Temperature Grade | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
Key Differentiators
- Full 128 KB Flash within the pinout-compatible family (vs DSPIC33FJ64GP204-I/PT)
- GP-series peripheral set for general-purpose DSP and audio (vs DSPIC33FJ64MC204-I/PT)
- Trade-off: not the newest generation (vs DSPIC33EP64GP504T-E/TL)
Design Notes
The dsPIC33FJ family uses an internal 2.5V regulator for the core, decoupled by an external low-ESR capacitor (approximately 10 uF) on the VCAP pin as specified in Microchip family datasheet 70292G. Fit this capacitor exactly as recommended - an incorrect value or high ESR causes unstable core supply and erratic resets. Connect ALL VDD/VSS pin pairs; leaving a pair unconnected is a common cause of intermittent failures and also blocks ICSP programming.
ICSP programming requires matched PGECx/PGEDx pairs. Per Microchip's programming support documentation, if PGEC2 carries ICSPCLK then ICSPDAT must be on PGED2 - mixing pins from different pairs prevents programming and debugging. Route the chosen pair to a standard programming header on every production PCB, keeping the traces short and away from switching nodes of on-board power converters to avoid debug-session corruption.
For the 10x10 mm TQFP, place a 0.1 uF ceramic decoupling capacitor at each VDD/VSS pair within 2-3 mm of the pins, plus one bulk 10 uF capacitor per supply rail. Use a solid ground plane; the DSP engine switching at 40 MIPS generates current transients that a poor return path converts into ground bounce on the ADC reference. Keep the oscillator traces (OSC1/OSC2) short and guard them with ground to minimize jitter in DSP timing loops.
When using the DMA to stream ADC results, disable interrupts or use priority management during burst transfers: 8 DMA channels active simultaneously can starve the CPU and cause control-loop jitter. Microchip's dsPIC33F family reference manual DSP chapter documents the DMA-to-CPU arbitration scheme; budget worst-case bus occupancy at your maximum sample rate before committing to a loop period.
Compliance Information
RoHS-compliant and lead-free per the /PT suffix and Microchip current-production status shown on DigiKey/Mouser listings. Detailed REACH, halogen-free and conflict-minerals declarations are not included in the provided data - obtain formal certificates from Microchip's product page.
