DSPIC33FJ128GP804-E/PT Microchip dsPIC33F 16-Bit Digital Signal Controller 40MIPS 128KB Flash General Purpose PWM ADC Extended Temp TQFP-44

DSPIC33FJ128GP804-E/PT Product Overview

The DSPIC33FJ128GP804-E/PT is a Microchip general-purpose 16-bit Digital Signal Controller (DSC) in a 44-lead TQFP package, designed for 3.3V embedded applications that require large memory and reliable operation in elevated temperatures. Based on the dsPIC33F core running at 40 MIPS, the DSPIC33FJ128GP804-E/PT integrates 128KB Flash and 16KB SRAM, comfortably hosting complex algorithms, dual protocol stacks, and real-time data buffering. The extended temperature range of -40°C to +125°C ensures continuous, stable operation of the DSPIC33FJ128GP804-E/PT in harsh thermal environments such as engine compartments, near industrial furnaces, or sun-exposed outdoor enclosures. On-chip peripherals of the DSPIC33FJ128GP804-E/PT 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 on the DSPIC33FJ128GP804-E/PT offer 2× UART, 1× SPI, and 1× I2C, all with Peripheral Pin Select (PPS) for flexible pin mapping. Operating from 3.0V to 3.6V, in a TQFP-44 package, the DSPIC33FJ128GP804-E/PT suits high-temperature industrial control, automotive auxiliary modules, outdoor instrumentation, and other real-time control systems with stringent memory and temperature requirements.

DSPIC33FJ128GP804-E/PT Core Features

Processor Core: The DSPIC33FJ128GP804-E/PT features a 16-bit dsPIC33F core, 40 MIPS, DSP-enhanced instruction set

Program Memory: The DSPIC33FJ128GP804-E/PT provides 128KB Flash

Data Memory: The DSPIC33FJ128GP804-E/PT includes 16KB SRAM

Timers & Signal Processing: The DSPIC33FJ128GP804-E/PT integrates 5× 16-bit timers, 4× input capture, 4× output compare/PWM

Analog Front-End: The DSPIC33FJ128GP804-E/PT offers a 10-bit ADC (1.1 Msps, up to 13 channels), 4 analog comparators

Communication Interfaces: The DSPIC33FJ128GP804-E/PT provides 2× UART, 1× SPI, 1× I2C, with Peripheral Pin Select (PPS)

System Management: The DSPIC33FJ128GP804-E/PT contains a watchdog timer, BOR/POR, on-chip oscillator, hardware CRC

General Purpose I/O: The DSPIC33FJ128GP804-E/PT delivers up to 35 programmable I/O pins

Power & Package: The DSPIC33FJ128GP804-E/PT operates from 3.0V – 3.6V, in a TQFP-44 package, extended -40°C to +125°C

DSPIC33FJ128GP804-E/PT Applications

High-Temperature Industrial Control: The DSPIC33FJ128GP804-E/PT is ideal for controllers near industrial furnaces, downhole data acquisition, high-ambient process control

Automotive Auxiliary Electronics: The DSPIC33FJ128GP804-E/PT can be used in engine-compartment auxiliary modules, high-temperature sensor interfaces, vehicle communication gateways

Outdoor Instrumentation: The DSPIC33FJ128GP804-E/PT is suitable for outdoor base station auxiliary control, solar tracking systems, environmental monitoring stations

General Real-Time Control: The DSPIC33FJ128GP804-E/PT excels in embedded systems requiring large memory and high-temperature reliability

DSPIC33FJ128GP804-E/PT Key Advantages

Extended Temperature -40°C to +125°C: The DSPIC33FJ128GP804-E/PT enables continuous operation in environments far beyond the standard industrial 85°C limit, providing reliable performance in extreme heat, significantly reducing system cooling costs and failure risks from overheating.

Massive Memory, No Thermal Compromise: The DSPIC33FJ128GP804-E/PT’s 128KB Flash and 16KB SRAM are exceptionally generous in a 44-lead package, simultaneously running complex algorithms, multi-tasking logic, and communication stacks, fully meeting the higher code and data buffer demands of high-temperature applications.

Dual UART + PPS Flexible Communication: Two independent UARTs on the DSPIC33FJ128GP804-E/PT can simultaneously handle debug output and fieldbus, with PPS flexibly assigning pins to simplify wiring in high-temperature environments.

Enhanced Analog Front-End: The DSPIC33FJ128GP804-E/PT’s 13-channel 10-bit ADC paired with four analog comparators provides a complete single-chip solution for multi-sensor acquisition and fast fault detection.

3.3V Low-Voltage Operation: The DSPIC33FJ128GP804-E/PT is level-compatible with mainstream MCUs, DSPs, and digital isolators, eliminating extra level shifters, reducing BOM cost, and simplifying power design.

Mature Development Toolchain: The DSPIC33FJ128GP804-E/PT is supported by free MPLAB X IDE and XC16 compiler, combined with MCC, DSP libraries, and peripheral libraries, enabling rapid progress from prototype verification to production.

Long-Term Availability: The DSPIC33FJ128GP804-E/PT is a mature dsPIC33F family product with stable long-term supply commitment.

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FAQ

1. What does the “E” in the part number represent? How does it differ from the industrial “I” version?
   
   • E stands for Extended temperature range (-40°C to +125°C), 40°C higher than the industrial I version (-40°C to +85°C), specifically designed for high-temperature environments.
   • The internal silicon, functionality, and performance of the DSPIC33FJ128GP804-E/PT are identical; only the temperature rating differs. If your application operates in engine compartments, near furnaces, or other high-ambient conditions, the DSPIC33FJ128GP804-E/PT is essential.
2. What does the 125°C extended temperature mean for practical design?
   
   • The DSPIC33FJ128GP804-E/PT can operate continuously with ambient or junction temperatures approaching 125°C, such as on control boards mounted directly on heating elements or inside sealed outdoor enclosures without air conditioning.
   • Design considerations for PCB heat dissipation and chip power consumption are needed to ensure the junction temperature of the DSPIC33FJ128GP804-E/PT does not exceed 125°C. This temperature grade provides a higher reliability margin, reducing unexpected shutdowns due to overheating.
3. Does it have DMA? How does it differ from non-A variants?
   
   • The DSPIC33FJ128GP804-E/PT 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 DSPIC33FJ64GP804, the DSPIC33FJ128GP804-E/PT doubles Flash from 64KB to 128KB and SRAM from 8KB to 16KB, making it better suited for complex algorithm applications needing larger memory.
4. How many I/Os and analog channels does the 44-lead package provide?
   
   • The DSPIC33FJ128GP804-E/PT provides up to 35 general-purpose I/O pins, meeting the peripheral connection needs of moderately complex systems.
   • The 10-bit ADC of the DSPIC33FJ128GP804-E/PT supports up to 13 analog input channels, simultaneously acquiring multiple sensor, voltage, and current signals, with 4 analog comparators for fast fault protection.
5. Can it be used to control motors?
   
   • The four output compares on the DSPIC33FJ128GP804-E/PT can generate general-purpose PWM signals suitable for driving brushed DC motors or stepper motors (with external drivers).
   • The DSPIC33FJ128GP804-E/PT 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?
   
   • The DSPIC33FJ128GP804-E/PT provides 2× UART, 1× SPI, and 1× I2C, all with flexible PPS mapping.
   • For example, one UART of the DSPIC33FJ128GP804-E/PT 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. Are there any special requirements for power and reset in high-temperature environments?
   
   • The DSPIC33FJ128GP804-E/PT integrates Power-on Reset (POR) and Brown-out Reset (BOR), which remain reliable at high temperatures, eliminating the need for external reset ICs.
   • The built-in high-accuracy on-chip oscillator remains stable across the full -40°C to +125°C temperature range of the DSPIC33FJ128GP804-E/PT, enabling operation without an external crystal and simplifying high-temperature circuit design.
8. What tools are needed for development and debugging?
   
   • Free MPLAB X IDE and MPLAB XC16 compiler for the DSPIC33FJ128GP804-E/PT.
   • Hardware debuggers: PICkit 4 or MPLAB ICD 4, supporting in-circuit programming and real-time debugging of the DSPIC33FJ128GP804-E/PT.
   • MPLAB Code Configurator (MCC) graphically generates peripheral drivers, significantly lowering the development barrier for the DSPIC33FJ128GP804-E/PT.
9. What is the size and soldering difficulty of the TQFP-44 package?
   
   • The DSPIC33FJ128GP804-E/PT comes in a 10mm×10mm package with 0.8mm pin pitch, a medium-density QFP that is easier to hand-solder than 0.5mm pitch packages.
   • Standard reflow soldering processes achieve high yield with the DSPIC33FJ128GP804-E/PT. Hand soldering is also feasible using flux and drag-soldering techniques.
10. What projects and stages is the DSPIC33FJ128GP804-E/PT suitable for?
    It is ideal for industrial control, automotive auxiliary, or outdoor instrumentation projects under development or upgrade that require operation in high-temperature environments and large memory capacity. The DSPIC33FJ128GP804-E/PT’s 128KB Flash and 16KB SRAM reserve generous headroom for complex algorithms and future firmware upgrades, while its extended temperature rating ensures long-term reliability in harsh thermal environments. The mature dsPIC33F architecture enables rapid progress from prototype verification to production.