DSPIC33FJ128GP802-I/SO Microchip dsPIC33F 16-Bit Digital Signal Controller 40MIPS 128KB Flash General Purpose PWM ADC SOIC-28

Product Overview

The DSPIC33FJ128GP802-I/SO is a Microchip general-purpose 16-bit Digital Signal Controller (DSC) in a 28-lead SOIC narrow-body package, integrating 128KB Flash and 16KB SRAM in a production-friendly, easy-to-hand-solder standard package. The DSPIC33FJ128GP802-I/SO is designed for 3.3V embedded control applications requiring high algorithmic complexity and generous memory. Based on the dsPIC33F core running at 40 MIPS, the DSPIC33FJ128GP802-I/SO efficiently handles digital signal processing, closed-loop control, and multi-protocol communication. On-chip peripherals include five 16-bit timers, four input captures, four output compares/PWM, a 10-bit ADC (up to 1.1 Msps, up to 13 analog input channels), and four analog comparators. Communication interfaces offer 2× UART, 1× SPI, and 1× I2C, all with Peripheral Pin Select (PPS) for flexible pin mapping and layout optimization. Operating from 3.0V to 3.6V with an industrial temperature range of -40°C to +85°C, in an SOIC-28 package. The DSPIC33FJ128GP802-I/SO is ideal for industrial sensor nodes, communication gateways, portable instruments, and any general-purpose real-time control system that requires large memory and rich peripherals on a small PCB, particularly well-suited for prototyping, low-to-medium volume production, and applications where ease of maintenance is a priority. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Core Features

Processor Core: 16-bit dsPIC33F core, 40 MIPS, DSP-enhanced instruction set. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Program Memory: 128KB Flash. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Data Memory: 16KB SRAM. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Timers & Signal Processing: 5× 16-bit timers, 4× input capture, 4× output compare/PWM. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Analog Front-End: 10-bit ADC (1.1 Msps, up to 13 channels), 4 analog comparators. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Communication Interfaces: 2× UART, 1× SPI, 1× I2C, with Peripheral Pin Select (PPS). The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

System Management: Watchdog timer, BOR/POR, on-chip oscillator, hardware CRC. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

General Purpose I/O: Up to 21 programmable I/O pins. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Power & Package: 3.0V – 3.6V, SOIC-28 (narrow), industrial -40°C to +85°C. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

DSPIC33FJ128GP802-I/SO Applications

Industrial Sensor Nodes: Transmitters, process controllers, micro distributed I/O modules. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Communication Gateways: Dual-UART protocol converters, RS-485/RS-232 hubs, IoT edge controllers. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Portable & Consumer Electronics: Advanced HMIs, portable instruments, battery-powered smart devices. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

General Real-Time Control: Embedded systems requiring large memory and rich peripherals with high serviceability. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

DSPIC33FJ128GP802-I/SO Key Advantages

SOIC Package, Production-Friendly: The 28-lead SOIC narrow-body package with 1.27mm pin pitch is extremely easy to hand-solder and compatible with automated reflow. Visible solder joints facilitate inspection and repair, making it ideal for R&D, low-volume production, and field maintenance. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Massive Memory in a Small Package: 128KB Flash and 16KB SRAM are remarkably generous in a 28-lead package, comfortably hosting complex algorithms, dual protocol stacks, and real-time data logging, providing a solid platform for long-term feature evolution. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Dual UART + PPS for Flexible Communication: Two independent UARTs can simultaneously handle debug output and fieldbus communication, with PPS flexibly assigning pins to simplify layout on compact PCBs. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Enhanced Analog Front-End: 13-channel 10-bit ADC paired with four analog comparators provides a complete single-chip solution for multi-sensor acquisition and fast fault detection. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

3.3V Single-Supply Operation: Level-compatible with mainstream MCUs, DSPs, and digital isolators, eliminating extra level shifters, reducing BOM cost, and simplifying power design. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Mature Development Toolchain: Free MPLAB X IDE and XC16 compiler, combined with MCC, DSP libraries, and peripheral libraries, enable rapid progress from prototype verification to production. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

Long-Term Availability: A mature dsPIC33F family product with stable long-term supply commitment. The DSPIC33FJ128GP802-I/SO is a reliable DSC for production. DSPIC33FJ128GP802-I/SO offers excellent performance in SOIC package.

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FAQ

1. What is the difference between the SO (SOIC) and MM (QFN) packages? How do I choose?
   
   • SO is a 28-lead SOIC narrow-body package with exposed leads and 1.27mm pin pitch, making hand soldering very easy, with visible joints for straightforward debugging and repair.
   • MM is a QFN package with a smaller footprint and better thermal performance, but requires hot air or reflow soldering and is less suited to repeated rework.
   • If your project is in the R&D phase, or requires easy maintenance and hand soldering, the SO package is the better fit. If ultra-compact size and superior heat dissipation are critical, consider the MM package.
2. What can the 128KB Flash and 16KB SRAM do in a 28-lead package?
   
   • Run complex DSP algorithms such as FIR/IIR filters, FFT, and closed-loop control, while providing ample space for dual protocol stacks (e.g., Modbus plus proprietary) and real-time data logging.
   • The 16KB SRAM can buffer extensive ADC sampling data, support software data logging, complex state machines, or a lightweight RTOS without external RAM.
3. Does it have DMA? How does it differ from non-A variants?
   
   • This model does not include a DMA controller; all data transfers are handled by the CPU. If DMA-assisted data movement is required, choose an enhanced model with the “A” suffix.
   • Compared to the DSPIC33FJ64GP802, this device doubles Flash from 64KB to 128KB and SRAM from 8KB to 16KB, making it better suited for complex algorithm applications needing larger memory.
4. What is the accuracy and speed of the 13-channel 10-bit ADC? Can it meet industrial sensing needs?
   
   • Sampling rate up to 1.1 Msps enables fast scanning of multiple analog signals, suitable for temperature, pressure, and current transmitter signal acquisition.
   • 10-bit resolution combined with DSP oversampling and digital filtering techniques can effectively improve equivalent resolution, meeting most industrial measurement accuracy requirements.
5. Can it be used to control motors?
   
   • The four output compares can generate general-purpose PWM signals suitable for driving brushed DC motors or stepper motors (with external drivers).
   • It lacks hardware complementary outputs and dead-time insertion, making it unsuitable for directly driving 3-phase BLDC/PMSM inverter bridges. For high-performance motor control, consider the dsPIC33F MC series.
6. What communication interfaces does it have? Can it perform multi-protocol conversion simultaneously?
   
   • It provides 2× UART, 1× SPI, and 1× I2C, all with flexible PPS mapping.
   • For example, one UART can serve as a debug console, another can connect to RS-485 or a Bluetooth module, SPI to an external ADC/DAC, and I2C to sensors or EEPROM, easily achieving multi-protocol conversion.
7. How reliable is the SOIC-28 package in volume production?
   
   • The SOIC package is one of the industry's most mature surface-mount packages, with wide pin spacing and extremely high soldering reliability, offering excellent vibration and thermal cycling performance.
   • It is highly suited for long-term operation in industrial environments and facilitates field repair and replacement.
8. What tools and environment are needed for development?
   
   • Free MPLAB X IDE and MPLAB XC16 compiler.
   • Hardware debuggers: PICkit 4 or MPLAB ICD 4, supporting in-circuit programming and real-time debugging.
   • MPLAB Code Configurator (MCC) graphically generates peripheral drivers, significantly lowering the development barrier.
9. Does it require an external crystal and reset chip?
   
   • Built-in high-accuracy on-chip oscillator and PLL enable stable operation without an external crystal, saving PCB space and BOM cost.
   • Integrated Power-on Reset (POR) and Brown-out Reset (BOR) ensure reliable start-up without an external reset IC.
10. What projects and stages is the DSPIC33FJ128GP802-I/SO suitable for?
    It is ideal for industrial sensor, communication gateway, and portable instrument projects under development or in low-to-medium volume production, especially those requiring hand soldering, convenient debugging, and easy maintenance. Its 128KB Flash and 16KB SRAM reserve generous headroom for complex algorithms and future firmware upgrades, and the mature dsPIC33F architecture enables rapid progress from prototype verification to production.