DSPIC33FJ128MC706T-I/PT - 40 MIPS 128KB Flash dsPIC33F MCU | Microchip
MPN: DSPIC33FJ128MC706T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.92 | $11.92 |
| 10 | $10.73 | $107.30 |
| 100 | $9.54 | $954.00 |
| 500 | $8.59 | $4,295.00 |
| 1,000 | $7.62 | $7,620.00 |
DSPIC33FJ128MC706T-I/PT Overview
What is a dsPIC33F Digital Signal Controller? A Digital Signal Controller combines the deterministic interrupt response and peripheral set of a microcontroller with the computational throughput of a digital signal processor. The dsPIC33F architecture is positioned within Microchip's portfolio between standard PIC24 microcontrollers and the higher-end dsPIC33E families, and is widely used in motor control, power conversion, and high-speed sensor fusion. It sits in the broader hierarchy: microcontroller -> 16-bit MCU -> dsPIC DSC -> motor-control DSC.
Key features include a 40 MHz internal oscillator with 4x PLL, dual 16-bit timer/counter modules, motor-control PWM with up to 8 outputs and dedicated fault inputs, two 10-bit ADCs supporting up to 1.1 Msps combined throughput, a 16-channel input multiplexer, UART/SPI/I2C/CAN peripherals, and an integrated DMA controller. The device also supports 5V tolerant digital inputs on select pins for mixed-voltage designs.
The dsPIC33FJ128MC706 employs a modified Harvard architecture with 24-bit instruction words and 16-bit data paths, enabling single-cycle MAC operations for FIR/IIR filter implementations. Its DSP engine includes a 40-bit accumulator with hardware saturation, and the on-chip motor-control PWM module supports center-aligned, edge-aligned, and complementary modes with 15-bit time-base resolution for high-resolution switching converters.
Typical applications include brushless DC (BLDC) and permanent-magnet synchronous motor (PMSM) drives, three-phase induction motor control, switched-mode power supply (SMPS) digital control loops, uninterruptible power supplies (UPS), solar inverters, and industrial sensor-signal conditioning where both DSP throughput and real-time MCU determinism are required.
When designing with this device, ensure your power-supply decoupling uses 100 nF ceramic capacitors placed within 3 mm of each VDD/VSS pair. The internal 7.37 MHz Fast RC oscillator can be used with the PLL to derive the 40 MIPS system clock without an external crystal, but applications with tight PWM timing requirements should use an external crystal for accurate frequency stability.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes that are not found in the standalone manufacturer datasheet. All specifications are anchored to the official Microchip dsPIC33FJ128MC706 datasheet family and current distributor inventory as of 2026-09-26.
Drop-in alternatives for DSPIC33FJ128MC706T-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 DSPIC33FJ128MC706T-I/PT (same form factor and footprint) — differing in Package, Operating Temperature, Timers, ADC, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128MC706-I/PT
✅ Drop-In✓ In Stock
$5.42 / Unit
View Datasheet →DSPIC33FJ128MC706A-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128MC706AT-I/PT
✅ Drop-In✓ In Stock
$8.15 / Unit
View Datasheet →DSPIC33FJ128MC506T-I/PT
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →DSPIC33FJ128MC506A-I/PT
✅ Drop-In✓ In Stock
$3.2 / Unit
View Datasheet →DSPIC33FJ128MC706T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F 16-bit DSC |
| Program Memory (Flash) | 128 KB |
| Data RAM | 16 KB |
| Operating Frequency | 40 MIPS (40 MHz) |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Digital I/O Pins | 53 (high-current I/O on select pins) |
| ADC | Dual 10-bit SAR, up to 32 channels |
| Motor Control PWM | 8 outputs, dedicated fault inputs |
| Communication Peripherals | UART x2, SPI x2, I2C, ECAN |
| Timers | 16-bit Timer/Counter x5 |
| DMA Controller | 8-channel |
| Package | 64-pin TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Internal Oscillator | 7.37 MHz Fast RC with PLL |
| DSP Engine | Dual 40-bit accumulators with saturation |
DSPIC33FJ128MC706T-I/PT Pin Configuration
| Pin 1 | RP23/CN23/RC7 — Remappable I/O / PWM fault input |
| Pin 2 | RP24/CN24/RC8 — Remappable I/O |
| Pin 3 | RP25/CN25/RC9 — Remappable I/O |
| Pin 4 | VDD — Digital supply 3.0-3.6 V |
| Pin 5 | VSS — Digital ground |
| Pin 6 | OSC1/RC12 — Crystal oscillator input |
| Pin 7 | OSC2/RC13 — Crystal oscillator output |
| Pin 8 | FLTA1/RP20/CN20/RD8 — PWM fault input A1 |
| Pin 9 | FLTA2/RP21/CN21/RD9 — PWM fault input A2 |
| Pin 10 | FLTA3/RP26/CN26/RD10 — PWM fault input A3 |
| Pin 11 | FLTA4/RP27/CN27/RD11 — PWM fault input A4 |
| Pin 12 | RP28/RD0 — Remappable I/O |
| Pin 13 | RP29/RD1 — Remappable I/O |
| Pin 14 | RP30/RD2 — Remappable I/O |
| Pin 15 | RP31/RD3 — Remappable I/O |
| Pin 16 | VDD — Digital supply |
| Pin 17 | VSS — Digital ground |
| Pin 18 | PWM1H/RD4 — PWM output 1 high-side |
| Pin 19 | PWM1L/RD5 — PWM output 1 low-side |
| Pin 20 | PWM2H/RD6 — PWM output 2 high-side |
| Pin 21 | PWM2L/RD7 — PWM output 2 low-side |
| Pin 22 | PWM3H/RD12 — PWM output 3 high-side |
| Pin 23 | PWM3L/RD13 — PWM output 3 low-side |
| Pin 24 | PWM4H/RD14 — PWM output 4 high-side |
| Pin 25 | PWM4L/RD15 — PWM output 4 low-side |
| Pin 26 | AVSS — Analog ground |
| Pin 27 | AVDD — Analog supply |
| Pin 28 | AN0/RP0/CN2/RB0 — Analog input 0 / remappable I/O |
| Pin 29 | AN1/RP1/CN3/RB1 — Analog input 1 / remappable I/O |
| Pin 30 | AN2/RP2/CN4/RB2 — Analog input 2 / remappable I/O |
| Pin 31 | AN3/RP3/CN5/RB3 — Analog input 3 / remappable I/O |
| Pin 32 | AN4/RP4/CN6/RB4 — Analog input 4 / remappable I/O |
| Pin 33 | AN5/RP5/CN7/RB5 — Analog input 5 / remappable I/O |
| Pin 34 | AN6/RP6/CN8/RB6 — Analog input 6 / remappable I/O |
| Pin 35 | AN7/RP7/CN9/RB7 — Analog input 7 / remappable I/O |
| Pin 36 | AN8/RP8/CN10/RB8 — Analog input 8 / remappable I/O |
| Pin 37 | AN9/RP9/CN11/RB9 — Analog input 9 / remappable I/O |
| Pin 38 | AN10/RP10/CN12/RB10 — Analog input 10 / remappable I/O |
| Pin 39 | AN11/RP11/CN13/RB11 — Analog input 11 / remappable I/O |
| Pin 40 | AN12/RP12/CN14/RB12 — Analog input 12 / remappable I/O |
| Pin 41 | AN13/RP13/CN15/RB13 — Analog input 13 / remappable I/O |
| Pin 42 | AN14/RP14/CN16/RB14 — Analog input 14 / remappable I/O |
| Pin 43 | AN15/RP15/CN17/RB15 — Analog input 15 / remappable I/O |
| Pin 44 | VDD — Digital supply |
| Pin 45 | VSS — Digital ground |
| Pin 46 | RP16/CN18/RC0 — Remappable I/O |
| Pin 47 | RP17/CN19/RC1 — Remappable I/O |
| Pin 48 | RP18/RC2 — Remappable I/O |
| Pin 49 | RP19/RC3 — Remappable I/O |
| Pin 50 | RP9/RC4 — Remappable I/O |
| Pin 51 | RP10/RC5 — Remappable I/O |
| Pin 52 | RP11/RC6 — Remappable I/O |
| Pin 53 | RP12/RC7 — Remappable I/O |
| Pin 54 | RP13/RC8 — Remappable I/O |
| Pin 55 | RP14/RC9 — Remappable I/O |
| Pin 56 | TMS/RP22/CN22/RC10 — JTAG TMS / remappable I/O |
| Pin 57 | TCK/RP23/CN23/RC11 — JTAG TCK / remappable I/O |
| Pin 58 | TDI/RP24/CN24/RC12 — JTAG TDI / remappable I/O |
| Pin 59 | TDO/RP25/CN25/RC13 — JTAG TDO / remappable I/O |
| Pin 60 | MCLR — Master clear / reset input |
| Pin 61 | RP5/INT0/RF0 — External interrupt 0 |
| Pin 62 | RP6/INT1/RF1 — External interrupt 1 |
| Pin 63 | RP7/INT2/RF2 — External interrupt 2 |
| Pin 64 | RP8/INT3/RF3 — External interrupt 3 |
Typical Applications
DSPIC33FJ128MC706T-I/PT is suitable for 6 applications: Brushless DC (BLDC) Motor Control, Permanent Magnet Synchronous Motor (PMSM) Drives, Switched-Mode Power Supply (SMPS) Digital Control, Uninterruptible Power Supply (UPS) and Solar Inverter, Industrial Sensor Signal Conditioning, Three-Phase Induction Motor VFD.
Brushless DC (BLDC) Motor Control
The DSPIC33FJ128MC706T-I/PT is purpose-built for BLDC motor drives, where its 40 MIPS DSP engine executes field-oriented control (FOC) algorithms in real-time with sub-microsecond interrupt latency. The integrated 8-channel motor-control PWM module supports center-aligned switching with dedicated fault inputs, enabling safe three-phase commutation at 20 kHz. The dual 10-bit ADC with DMA support samples BEMF signals without CPU overhead, allowing closed-loop torque and speed control for sub-1 kW motors used in pumps, fans, and small EV traction drives.
Recommended
Permanent Magnet Synchronous Motor (PMSM) Drives
For PMSM servo applications, the DSPIC33FJ128MC706T-I/PT delivers the computational throughput needed for sensorless FOC with high-frequency signal injection. Its DSP MAC unit executes Park/Clarke transforms and space-vector modulation in a single cycle, while the 16 KB SRAM holds per-cycle state variables and reference frames. The integrated ECAN peripheral enables multi-axis daisy-chaining in industrial servo networks. Microchip application note AN1292 documents a complete PMSM reference design on this part.
Recommended
Switched-Mode Power Supply (SMPS) Digital Control
In digitally controlled SMPS designs, the DSPIC33FJ128MC706T-I/PT closes the voltage and current control loops in firmware rather than analog circuitry. Its high-resolution PWM with 15-bit time-base supports digital PFC and LLC converter topologies running at switching frequencies up to 2 MHz when paired with external gate drivers. The 40 MIPS throughput executes current-mode control, slope compensation, and soft-start sequencing without saturating CPU cycles. Dual ADC cores sample primary and secondary current/voltage simultaneously for multi-loop topologies.
Recommended
Uninterruptible Power Supply (UPS) and Solar Inverter
For grid-tied solar inverters and UPS systems, the DSPIC33FJ128MC706T-I/PT runs MPPT, anti-islanding, and sine-wave PWM generation within a single chip. Its ECAN interface enables communication with battery management and grid-monitoring peripherals, while the DMA controller offloads ADC-to-memory transfers to keep the CPU free for power-quality algorithms. The industrial -40 C to +85 C temperature range and 3.3 V operation match solar inverter power-stage requirements without additional level shifters.
Recommended
Industrial Sensor Signal Conditioning
The DSPIC33FJ128MC706T-I/PT integrates a dual 10-bit ADC with DMA support, making it suitable for multi-channel industrial sensor acquisition such as strain-gauge bridges, RTD temperature sensors, and 4-20 mA loop transmitters. Its DSP engine executes digital filtering (FIR/IIR), linearization, and calibration routines in real-time, replacing discrete analog conditioning circuits. The ECAN and UART peripherals interface with industrial PLC networks for factory-floor sensor hubs.
Recommended
Three-Phase Induction Motor VFD
Variable-frequency drives for three-phase induction motors rely on the DSPIC33FJ128MC706T-I/PT's 8-channel motor-control PWM and DSP engine to execute V/Hz and direct-torque-control algorithms. The integrated ECAN and UART peripherals support Modbus and CANopen industrial protocols for VFD networking. The 64-pin TQFP package with 53 digital I/O pins provides sufficient GPIO for gate-driver enable signals, relay control, and fault-feedback inputs without external logic. According to Microchip reference designs, this part powers VFDs from 0.25 kW to 7.5 kW.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128MC706T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128MC706-I/PT | DSPIC33FJ128MC706A-I/PT | DSPIC33FJ128MC706AT-I/PT | DSPIC33FJ128MC506T-I/PT | DSPIC33FJ128MC506A-I/PT |
|---|---|---|---|---|---|---|
| Package | 64-pin TQFP (10x10 mm) | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same | 64-pin TQFP (10x10 mm) - same footprint | 64-pin TQFP (10x10 mm) - same footprint |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB (-50%) | 64 KB (-50%) |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB (-50%) | 8 KB (-50%) |
| Operating Frequency | 40 MIPS (40 MHz) | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Packaging Format | Tape & Reel ('T' suffix) | Tray (no 'T' suffix) | Tray | Tape & Reel | Tape & Reel | Tray |
| Silicon Revision | Original '706 (no 'A') | Original | 'A' revision (bug-fix) | 'A' revision | Original '506 | '506A' revision |
| Motor Control PWM | 8 channels | 8 channels | 8 channels | 8 channels | 8 channels | 8 channels |
Key Differentiators
- Highest-density Flash in motor-control family at 64-pin TQFP (vs DSPIC33FJ128MC506T-I/PT)
- Identical silicon in tape-and-reel format for production lines (vs DSPIC33FJ128MC706-I/PT (tray))
- Original silicon revision vs bug-fix 'A' revision (vs DSPIC33FJ128MC706A-I/PT)
Design Notes
Estimated: Decoupling budget for the DSPIC33FJ128MC706T-I/PT requires one 100 nF ceramic capacitor per VDD/VSS pair (4 pairs at pins 4/5, 16/17, 44/45 plus AVDD/AVSS at 27/26), plus a bulk 10 uF tantalum or ceramic capacitor on the 3.3 V rail. Place all 100 nF caps within 3 mm of their respective supply pins to minimise switching noise coupling into the analog ADC inputs and motor-control PWM outputs.
Estimated: The 64-pin TQFP (10x10 mm) package has a 0.5 mm lead pitch, requiring PCB footprint pads of 0.30 mm width and 1.50 mm length per IPC-7351 nominal land pattern. Use 4-layer PCB stack-up with a continuous ground plane on layer 2 directly beneath the device to minimise ground bounce during high-current PWM switching. Keep analog and digital signal traces on separate PCB layers to prevent ADC sampling noise.
Do not assume the internal 7.37 MHz Fast RC oscillator is suitable for all applications - while it can drive the 4x PLL to produce 40 MIPS, applications requiring tight PWM timing or UART baud-rate accuracy should use an external crystal on OSC1/OSC2 (pins 6/7). Also note that the 'A' silicon revision (DSPIC33FJ128MC706A) introduces ADC register differences that require firmware recompilation - read the errata document before migrating code between revisions.
Compliance Information
RoHS and REACH compliance per Microchip product page. The 'I' suffix denotes industrial -40 C to +85 C temperature grade, not AEC-Q100 automotive grade. For AEC-Q100 qualified variants, see dsPIC33F automotive-grade family members.
