DSPIC33FJ128GP708T-I/PT - 16-bit 40 MIPS DSC 128KB | Microchip
MPN: DSPIC33FJ128GP708T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.42 | $7.42 |
| 10 | $6.68 | $66.80 |
| 100 | $5.94 | $594.00 |
| 500 | $5.35 | $2,675.00 |
| 1,000 | $4.82 | $4,820.00 |
DSPIC33FJ128GP708T-I/PT Overview
A digital signal controller combines the computational architecture of a microcontroller with the numeric acceleration of a digital signal processor. In the power-management hierarchy, the dsPIC33F sits above general-purpose MCUs (such as the PIC18 family) and alongside dedicated DSPs, offering a single-chip solution for embedded control systems that need both real-time control loops and signal processing. It belongs to the broader category of 16-bit microcontrollers and digital signal controllers.
Key features include the high-performance dsPIC33F core running at 40 MIPS from an internal oscillator, 3V to 3.6V single-supply operation, and rich connectivity: CAN bus, I2C, SPI, UART/USART, IrDA, and LIN bus. Peripherals such as DMA, brown-out detect/reset, power-on reset, and I2S audio support reduce external component count in mixed-signal designs.
Architecturally, the dsPIC33F core pairs a 16-bit modified Harvard pipeline with DSP multiply-accumulate instructions and dual operand fetch, enabling efficient FIR/IIR filtering and FFT computation while retaining deterministic, interrupt-driven control behavior expected of a general-purpose MCU. Flash program memory is self-programmable for field updates, and the ICSP (In-Circuit Serial Programming) interface allows debugging via tools such as the MPLAB SNAP with only two I/O pins plus reset.
Typical applications include digital power supplies and motor control (using the high-speed PWM capability of the family), industrial automation nodes over CAN, and sensor signal processing where DSP filtering plus UART/I2C communication is required in one chip. Its industrial temperature grade (I, -40C to +85C) suits harsh environments.
Design consideration: operate from a clean 3.3V rail within the 3V to 3.6V range and decouple all VDD/VDDCORE pins per the Microchip datasheet layout guidance; the internal FRC oscillator reduces BOM cost but an external crystal is recommended for CAN timing accuracy.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-09-26.
Drop-in alternatives for DSPIC33FJ128GP708T-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 DSPIC33FJ128GP708T-I/PT (same form factor and footprint) — differing in Package, Core Architecture, Operating Temperature, Packaging, Peripherals.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128GP708-I/PT
✅ Drop-In✓ In Stock
$5.64 / Unit
View Datasheet →DSPIC33FJ128GP310T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.46 / Unit
View Datasheet →PIC24FJ128GA008T-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128GP708T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F 16-bit DSC |
| Maximum CPU Speed | 40 MIPS |
| Program Memory Size | 128KB (128K x 8) Flash |
| RAM Size | 16KB (16K x 8) |
| Supply Voltage Range | 3 V to 3.6 V |
| Operating Supply Voltage (max) | 3.6 V |
| Number of I/O | 69 |
| Pin Count | 80 |
| Package | 80-TQFP (12 x 12 mm body, PT suffix) |
| Mounting Style | Surface Mount |
| Interface Types | CAN, I2C, IrDA, LIN, SPI, UART/USART |
| Oscillator Type | Internal |
| Peripherals | AC'97, Brown-out Detect/Reset, DMA, I2S, POR |
| Program Memory Type | Flash |
| Data Bus Width | 16 bit |
| Operating Temperature Range | -40C to +85C (I grade) |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
DSPIC33FJ128GP708T-I/PT 80-tqfp (12 x 12 mm body, pt suffix) Pin Configuration Guide
Pin configuration for DSPIC33FJ128GP708T-I/PT (80-tqfp (12 x 12 mm body, pt suffix) 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 DSPIC33FJ128GP708T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ128GP708T-I/PT is suitable for 6 applications: Industrial CAN Networking Nodes, Digital Power Supplies, Motor Control Drives, Audio Signal Processing, Sensor Acquisition and IoT Gateways, Embedded Development and Education.
Industrial CAN Networking Nodes
The DSPIC33FJ128GP708T-I/PT fits industrial automation nodes because its integrated CAN 2.0B controller eliminates an external CAN peripheral, while the 40 MIPS dsPIC33F core handles protocol stacks and local control loops deterministically. In a typical node, the device reads sensors via SPI or I2C, executes a PID loop at 10-40 MIPS, and transmits status over CAN through a 3.3V-compatible transceiver. The -40C to +85C industrial grade and brown-out/power-on reset peripherals support unattended factory-floor operation. The internal oscillator reduces BOM cost, though an external crystal is recommended for strict CAN bit-timing budgets.
Recommended
Digital Power Supplies
Digital power conversion benefits from the dsPIC33FJ family's high-speed PWM capability and DSP math: the 40 MIPS core executes compensator calculations fast enough for switching frequencies in the hundreds of kilohertz. The DSPIC33FJ128GP708T-I/PT samples voltage/current feedback through its ADC, runs IIR compensation filters using hardware multiply-accumulate, and drives PWM outputs with cycle-by-cycle current limiting support. Its 128KB Flash accommodates state machines, fault logging, and firmware update loaders simultaneously. Because the core operates from 3.0V to 3.6V, gate drivers with 3.3V logic inputs interface directly without level shifting.
Recommended
Motor Control Drives
Brushed, brushless DC, and permanent-magnet motor drives use the DSPIC33FJ128GP708T-I/PT for field-oriented control: the 16-bit core with DSP instructions computes Clarke/Park transforms and PI current loops within single PWM periods. Sibling parts such as the dsPIC33FJ128MC708A are motor-control-specific, but the GP708 shares the same core, PWM infrastructure, and 80-TQFP footprint, making it suitable for general drives that also need CAN or UART connectivity to a host. The DMA controller offloads ADC result transfers so the CPU budget stays available for control math at 40 MIPS, and the industrial temperature grade suits enclosed drives.
Recommended
Audio Signal Processing
Audio applications leverage the DSPIC33FJ128GP708T-I/PT's I2S and AC'97 peripheral support: the device can interface directly to audio codecs and perform DSP filtering, mixing, or effects with its hardware multiply-accumulate unit at 40 MIPS. The 128KB Flash holds code plus filter coefficient tables, while 16KB SRAM buffers audio blocks for block-based processing. Compared with a general-purpose MCU, the DSC executes FIR filtering an order of magnitude faster, sustaining real-time throughput for sample rates of 48 kHz and beyond. Typical products include professional microphones, active speakers, and automotive audio front ends using the UART/IrDA ports for control.
Recommended
Sensor Acquisition and IoT Gateways
The DSPIC33FJ128GP708T-I/PT serves as the main controller in sensor acquisition systems: 69 I/O lines, multiple SPI/I2C/UART ports, and DMA allow simultaneous polling of many sensors while the DSP core performs filtering and feature extraction locally. Edge processing on the 40 MIPS core reduces the bandwidth sent to a gateway over CAN or UART, which is valuable in battery-adjacent or wired industrial IoT installations. The 3.0V to 3.6V supply matches common 3.3V sensor rails directly. The internal oscillator permits crystal-less designs for non-timing-critical sensor nodes, cutting bill-of-materials cost in volume production.
Recommended
Embedded Development and Education
Because the Explorer 16/32 Development Board supports dsPIC devices through Plug-In Modules (PIMs), the DSPIC33FJ128GP708T-I/PT is well suited for prototyping and teaching 16-bit embedded systems. Students and engineers use MPLAB X with MPLAB SNAP for in-circuit debugging and ICSP flashing via just two I/O pins plus MCLR, exactly as in production hardware. The 80-TQFP package exposes 69 I/O for lab exercises on CAN, SPI, I2C, and UART simultaneously. Tape-and-reel packaging (T suffix) supports pick-and-place assembly in teaching labs that populate their own boards at volume.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128GP708T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128GP708-I/PT | DSPIC33FJ128GP310T-I/PT | PIC24FJ128GA008T-I/PT |
|---|---|---|---|---|
| Package | 80-TQFP (12x12) | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | dsPIC33F 16-bit DSC | dsPIC33F 16-bit DSC | dsPIC33F 16-bit DSC | PIC24F 16-bit MCU (no DSP core) |
| Flash Program Memory | 128KB (128K x 8) | 128KB | 128KB | 128KB |
| Packaging Format | Tape & Reel (T suffix) | Tray (no T suffix) | Tape & Reel | Tape & Reel |
Key Differentiators
- Hardware DSP acceleration in an MCU-class part (vs PIC24FJ128GA008T-I/PT)
- Integrated audio interface set (vs DSPIC33FJ128GP310T-I/PT)
- Complete connectivity integration (vs DSPIC33FJ128GP708-I/PT)
Design Notes
Supply the DSPIC33FJ128GP708T-I/PT from a regulated 3.3V rail held within the datasheet 3.0V to 3.6V window. Decouple every VDD/VSS pair with 100nF ceramics placed within 2-3 mm of the pins, plus one bulk 10uF capacitor per board region. On 80-pin TQFP devices, omitting a single VDD decoupler can cause core-glitch resets during simultaneous output switching. Estimated: with ~50 mA typical core current, a 200 mV transient on a poorly decoupled rail is enough to trip brown-out reset.
Reserve the ICSP programming pins (PGC/PGD) and MCLR on a standard header during PCB layout - Microchip documents that MPLAB SNAP implements in-circuit debugging and ICSP using two device I/O pins plus reset. Route PGC/PGD short and away from noisy PWM/CAN traces. Keep the crystal (if used for CAN timing) within 10 mm of the OSC pins with ground guard traces, since the internal FRC oscillator is convenient but marginal for tight CAN bit-timing budgets at long bus lengths.
Do not confuse the T and non-T order codes when releasing the BOM: DSPIC33FJ128GP708T-I/PT is tape-and-reel for pick-and-place, while DSPIC33FJ128GP708-I/PT is tray-packed - same die, different delivery. Also, all dsPIC33F I/O is 3.3V logic; connecting 5V-tolerant assumptions from older PIC16/PIC18 5V designs will overstress pins. Verify the peripheral set of any same-footprint substitute (e.g., MC vs GP variants) against your schematic before qualifying the swap.
Estimated: at 40 MIPS with moderate I/O loading, core plus I/O dissipation is typically well under 0.5W, and the 80-TQFP 12 x 12 mm theta_JA of roughly 40-60 C/W on a standard 4-layer PCB keeps junction temperature rise below ~30C at 85C ambient worst case. No heatsink is required; ensure ground pour under the package to spread heat and provide the return path for high-speed DSP switching activity.
Compliance Information
Verified distributor data did not include explicit compliance certificate lines for this exact suffix. Microchip active production parts are generally RoHS/lead-free compliant; confirm on the official Microchip product page before shipping to regulated markets.
