DSPIC33FJ64GP708A-I/PT - 16-bit 40 MIPS DSC 64KB Flash | Microchip
MPN: DSPIC33FJ64GP708A-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $5.12 | $512.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.18 | $4,180.00 |
DSPIC33FJ64GP708A-I/PT Overview
A Digital Signal Controller blends the control peripherals of a microcontroller with the math acceleration of a DSP in a single chip. Within the power-management hierarchy of embedded processors, the dsPIC33FJ family sits between basic 16-bit MCUs (PIC24) and dedicated DSPs, offering DSP engine instructions, a hardware MAC, and seamless migration paths to PIC24H MCUs and dsPIC30F DSCs.
Key features include 40 MIPS core performance, 64 KB flash with self-programming capability, 16 KB SRAM, dual 4-wire SPI ports, two I2C ports, two UARTs, up to eight input capture and eight output compare channels, and a 5V-tolerant digital I/O structure. The A revision improves flash endurance and reliability over the original dsPIC33FJ64GP708.
Technically, the modified Harvard architecture executes most instructions in a single cycle, while the DSP engine performs single-cycle MAC with dual data fetch, 40-bit wide accumulators, and barrel shifting. Two 3-wire 16-bit program/ICSP interfaces (PGECx/PGEDx pairs) enable in-circuit debugging and programming via MPLAB ICD 3, REAL ICE, PICkit 3, or MPLAB Snap.
Typical applications include digital power supplies and PFC loops, motor control (BLDC, PMSM, induction), LED lighting drivers, and sensor acquisition systems. The 85-C industrial temperature range (I grade) covers most factory environments.
Design tip: all VDD/VSS pairs must be decoupled with 0.1 uF ceramics, and the VCAP/VDDCORE pin requires a low-ESR 10 uF capacitor plus a 0.1 uF bypass - omitting this is the most common bring-up failure.
This page synthesizes distributor pricing, verified drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ64GP708A-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 DSPIC33FJ64GP708A-I/PT (same form factor and footprint) — differing in Package, Operating Temperature, ADC, I2C, Input Capture / Output Compare.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128GP708A-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$11.8 / Unit
View Datasheet →DSPIC33FJ256GP708A-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GP708A-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GP708A-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ64GP708-I/PT
✅ Drop-In✓ In Stock
$6.35 / Unit
View Datasheet →DSPIC33FJ64GP708A-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit modified Harvard (DSC) |
| Core Speed | 40 MIPS |
| Program Memory (Flash) | 64 KB (22 Kwords) |
| SRAM | 16 KB |
| Operating Voltage | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 80-pin TQFP (PT), 12 x 12 mm |
| Mounting Type | Surface Mount |
| I/O Pins | Up to 66 digital I/O |
| ADC | 10-bit, 1.1 Msps, multi-channel |
| UART | 2 |
| SPI | 2 (4-wire) |
| I2C | 2 |
| Input Capture / Output Compare | 8 IC / 8 OC |
| Timers | Type A and Type B 16-bit timers |
| Debug/Programming | ICSP via PGECx/PGEDx pairs, 2-wire |
| DSP Engine | Single-cycle MAC, dual 40-bit accumulators |
| Supply Class | 3.3 V |
DSPIC33FJ64GP708A-I/PT Pin Configuration
| Pin 1 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive voltage reference / change notification / port B |
| Pin 2 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative voltage reference / change notification / port B |
| Pin 3 | AN2/SS1/CN4/RB2 — Analog input 2 / SPI1 slave select / port B |
| Pin 4 | AN3/INDX/CN5/RB3 — Analog input 3 / QEA index input / port B |
| Pin 5 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / QEA encoder / input capture 7 / port B |
| Pin 6 | AN5/QEB/IC8/CN7/RB5 — Analog input 5 / QEB encoder / input capture 8 / port B |
| Pin 7 | AN6/OCFA/RB6 — Analog input 6 / output compare fault A / port B |
| Pin 7 | AN6/OCFA/RB6 — Analog input 6 / output compare fault A / port B |
| Pin 8 | AN7/PGD/RB7 — Analog input 7 / programming data / port B |
| Pin 9 | AN8/PGC/RB8 — Analog input 8 / programming clock / port B |
| Pin 10 | AN9/RB9 — Analog input 9 / port B |
| Pin 11 | VDD — Power supply 3.3V |
| Pin 12 | VSS — Ground reference |
| Pin 13 | AN10/T2CK/RC0 — Analog input 10 / Timer2 clock / port C |
| Pin 14 | AN11/T3CK/RC1 — Analog input 11 / Timer3 clock / port C |
| Pin 15 | AN12/U1RTS/SDO2/RC2 — Analog input 12 / UART1 RTS / SPI2 data out / port C |
| Pin 16 | AN13/U1CTS/SDI2/RC3 — Analog input 13 / UART1 CTS / SPI2 data in / port C |
| Pin 17 | PGD2/AN14/SCK2/CN9/RC4 — Programming data 2 / analog input 14 / SPI2 clock / port C |
| Pin 18 | PGC2/AN15/CN10/RC5 — Programming clock 2 / analog input 15 / port C |
| Pin 19 | VDD — Power supply 3.3V |
| Pin 20 | VSS — Ground reference |
| Pin 21 | TMS/RC6 — JTAG test mode select / port C |
| Pin 22 | TCK/RC7 — JTAG test clock / port C |
| Pin 23 | TDO/SDO1/RF1 — JTAG test data out / SPI1 data out / port F |
| Pin 24 | TDI/RF2 — JTAG test data in / port F |
| Pin 25 | U1RX/RF2 — UART1 receive / port F |
| Pin 26 | U1TX/RF3 — UART1 transmit / port F |
| Pin 27 | SDA2/RF4 — I2C2 data / port F |
| Pin 28 | SCL2/RF5 — I2C2 clock / port F |
| Pin 29 | VSS — Ground reference |
| Pin 30 | VDD — Power supply 3.3V |
| Pin 31 | SDA1/RF6 — I2C1 data / port F |
| Pin 32 | SCL1/RF7 — I2C1 clock / port F |
| Pin 33 | SCK1/RF8 — SPI1 clock / port F |
| Pin 34 | U2TX/RF10 — UART2 transmit / port F |
| Pin 35 | U2RX/RF11 — UART2 receive / port F |
| Pin 36 | RF12 — General purpose I/O port F |
| Pin 37 | RF13 — General purpose I/O port F |
| Pin 38 | SDI1/RF7 — SPI1 data in / port F (remappable) |
| Pin 39 | SS1/RF6 — SPI1 slave select / port F (remappable) |
| Pin 40 | RG0 — General purpose I/O port G |
| Pin 41 | RG1 — General purpose I/O port G |
| Pin 42 | VSS — Ground reference |
| Pin 43 | VDD — Power supply 3.3V |
| Pin 44 | OC1/RD0 — Output compare 1 / port D |
| Pin 45 | OC2/RD1 — Output compare 2 / port D |
| Pin 46 | OC3/RD2 — Output compare 3 / port D |
| Pin 47 | OC4/RD3 — Output compare 4 / port D |
| Pin 48 | OC5/RD4 — Output compare 5 / port D |
| Pin 49 | OC6/RD5 — Output compare 6 / port D |
| Pin 50 | OC7/RD6 — Output compare 7 / port D |
| Pin 51 | OC8/RD7 — Output compare 8 / port D |
| Pin 52 | VSS — Ground reference |
| Pin 53 | IC1/RD8 — Input capture 1 / port D |
| Pin 54 | IC2/RD9 — Input capture 2 / port D |
| Pin 55 | IC3/RD10 — Input capture 3 / port D |
| Pin 56 | IC4/RD11 — Input capture 4 / port D |
| Pin 57 | IC5/RD12 — Input capture 5 / port D |
| Pin 58 | IC6/RD13 — Input capture 6 / port D |
| Pin 59 | RTCC/RG2 — Real-time clock alarm / port G |
| Pin 60 | RG3 — General purpose I/O port G |
| Pin 61 | PGED3/RG4 — Programming data 3 / port G |
| Pin 62 | PGEC3/RG5 — Programming clock 3 / port G |
| Pin 63 | VDD — Power supply 3.3V |
| Pin 64 | VSS — Ground reference |
| Pin 65 | MCLR — Master clear reset (active low), programming mode entry |
| Pin 66 | RA0 — General purpose I/O port A |
| Pin 67 | RA1 — General purpose I/O port A |
| Pin 68 | PGED1/AN16/CN11/RA2 — Programming data 1 / analog input 16 / port A |
| Pin 69 | PGEC1/AN17/CN12/RA3 — Programming clock 1 / analog input 17 / port A |
| Pin 70 | VCAP/VDDCORE — Core voltage regulator output - requires 10 uF low-ESR capacitor to VSS |
| Pin 71 | OSC1/CLKI/RA2 — Oscillator crystal input / external clock input |
| Pin 72 | OSC2/CLKO/RA3 — Oscillator crystal output / clock output |
| Pin 73 | RA4 — General purpose I/O port A |
| Pin 74 | RA5 — General purpose I/O port A |
| Pin 75 | ENVREG — Voltage regulator enable - tie to VDD for internal regulator or to VSS for external 3.3V core supply |
| Pin 76 | VDD — Power supply 3.3V |
| Pin 77 | VSS — Ground reference |
| Pin 78 | RA9 — General purpose I/O port A |
| Pin 79 | RA10 — General purpose I/O port A |
| Pin 80 | AVDD — Analog power supply (3.3V) for ADC |
Typical Applications
DSPIC33FJ64GP708A-I/PT is suitable for 6 applications: Digital Power Supplies, BLDC / PMSM Motor Control, LED Lighting Drivers, Industrial Data Acquisition and Sensor Hubs, Audio and Signal Processing Front Ends, Embedded Control and IoT Nodes.
Digital Power Supplies
The DSPIC33FJ64GP708A-I/PT fits digital SMPS and PFC control because its 40 MIPS core executes single-cycle MAC operations that close fast voltage and current loops with deterministic latency, while the 10-bit 1.1 Msps ADC samples the power stage synchronized to the PWM cycle. In a typical topology, ADC results trigger control-loop ISR execution and output compare/PWM peripherals drive the MOSFET gate stage, giving cycle-by-cycle current limiting in firmware. Because the entire 80-pin device runs from a 3.3V rail with 5V-tolerant inputs, it interfaces directly with common gate drivers and feedback dividers. The 64 KB flash accommodates multi-mode control (CCM, DCM, burst) plus compensation and fault management without external memory.
Recommended
BLDC / PMSM Motor Control
For motor drives, the DSPIC33FJ64GP708A-I/PT provides eight output compare channels for six-step or sinusoidal commutation and eight input capture channels for hall-sensor or encoder feedback. The DSP engine executes Clarke and Park transforms for field-oriented control with single-cycle MAC throughput at 40 MIPS, allowing current loops running at 20 kHz switching to complete in a fraction of the PWM period. The 3.0V to 3.6V core interfaces to gate drivers through level-shifted logic, and the -40C to +85C industrial rating covers most drive enclosures. With 16 KB SRAM, sensorless algorithms with state observers fit without external RAM.
Recommended
LED Lighting Drivers
In high-power LED systems, the DSPIC33FJ64GP708A-I/PT implements constant-current control, dimming (PWM and analog), color mixing, and DALI or DMX protocol handling concurrently. The eight output compare channels generate multi-channel dimming PWMs with hardware precision, while the 1.1 Msps ADC monitors output current, LED forward voltage, and temperature for protection. The 40 MIPS core has ample headroom to run communications protocols alongside the control loop on a single chip, replacing discrete MCU-plus-DSP solutions. Its 85C industrial rating suits enclosed luminaire drivers, and the 80-pin TQFP provides enough I/O for large multi-string fixtures.
Recommended
Industrial Data Acquisition and Sensor Hubs
As a sensor hub, the DSPIC33FJ64GP708A-I/PT combines a multi-channel 10-bit ADC sampling up to 1.1 Msps with dual SPI and dual I2C ports for external precision ADCs, and dual UARTs for RS-485/Modbus field connectivity. The DSP engine performs windowed filtering and FFT-based diagnostics locally at 40 MIPS, reducing data traffic to a supervisory controller. Up to 66 general-purpose I/O pins on the 80-pin TQFP handle relay control, limit switches, and front-panel interfaces in one footprint. The -40C to +85C range and 3.3V operation with 5V-tolerant inputs simplify integration into legacy industrial signal chains.
Recommended
Audio and Signal Processing Front Ends
The GP-family DSPIC33FJ64GP708A-I/PT serves audio and biomedical front ends where sampled signal processing is required: the dual 40-bit accumulators and single-cycle MAC execute FIR/IIR filters at 40 MIPS, while dual SPI ports stream data to external audio codecs or SD/SD-card storage. The 1.1 Msps ADC covers instrumentation channels, and eight input capture channels timestamp event signals for acoustic analytics. With 64 KB flash and 16 KB SRAM, complete filter banks and protocol stacks reside on chip. The single 3.3V rail and low peripheral count reduce BOM cost compared to a DSP-plus-MCU two-chip solution.
Recommended
Embedded Control and IoT Nodes
For general embedded control and connected nodes, the DSPIC33FJ64GP708A-I/PT offers a balanced profile: 40 MIPS of headroom for protocol stacks (Modbus, CAN via external transceiver, or software-defined serial), 64 KB flash for bootloader plus application, and rich timers for scheduling and measurement. ICSP debugging through MPLAB Snap or REAL ICE keeps development fast, and seamless migration to PIC24H or higher-density dsPIC33FJ parts protects the PCB investment as requirements grow. The 80-pin TQFP with 66 I/O lines handles HMI buttons, displays, and actuators directly, making it a cost-effective single-chip controller for industrial IoT gateways and equipment controllers.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ64GP708A-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128GP708A-I/PT | DSPIC33FJ256GP708A-I/PT | DSPIC33FJ32GP708A-I/PT | DSPIC33FJ64GP708A-E/PT | DSPIC33FJ64GP708-I/PT |
|---|---|---|---|---|---|---|
| Package | 80-pin TQFP (PT), 12 x 12 mm | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same | 80-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Flash Memory | 64 KB | 128 KB | 256 KB | 32 KB | 64 KB | 64 KB |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) |
| Silicon Revision | A revision (improved) | A revision | A revision | A revision | A revision | Original (non-A) |
| Communication Ports | 2x UART, 2x SPI, 2x I2C | 2x UART, 2x SPI, 2x I2C | 2x UART, 2x SPI, 2x I2C | 2x UART, 2x SPI, 2x I2C | 2x UART, 2x SPI, 2x I2C | 2x UART, 2x SPI, 2x I2C |
| Lifecycle Status | Active | Active | Active | Active | Active | Active (superseded by A version) |
Key Differentiators
- Best price/performance in the GP708A family for 64 KB designs (vs DSPIC33FJ128GP708A-I/PT)
- A-revision silicon reliability (vs DSPIC33FJ64GP708-I/PT)
- Extended temperature availability in same footprint (vs DSPIC33FJ64GP708A-E/PT)
- DSC capability vs plain MCU alternatives (vs PIC24HJ64GP504-I/PT (functional alternative, different package))
Design Notes
The dsPIC33FJ64GP708A integrates an on-chip 3.3V-to-1.8V core regulator whose output appears on the VCAP/VDDCORE pin. Fit a low-ESR 10 uF tantalum or ceramic plus a 0.1 uF ceramic capacitor directly at this pin. If ENVREG is tied to VDD the regulator is enabled; tying ENVREG to VSS disables it, requiring an external clean core supply. All VDD/VSS pairs (multiple around the 80-pin ring) each need their own 0.1 uF decoupling capacitor placed within 2-3 mm of the pin.
ICSP programming uses PGECx/PGEDx pin pairs - the device has multiple pairs (PGEC1/PGED1, PGEC2/PGED2, PGEC3/PGED3), and the clock and data must come from the SAME pair; mixing PGEC2 with PGED1 will fail programming. Do not load PGECx/PGEDx pins with heavy capacitive loads or pull-downs that could violate ICSP timing. Also note the original dsPIC33FJ64GP708 (non-A) is documented by third parties as having very low flash endurance (guaranteed only ~100 erase/write cycles), another reason to standardize on the A revision.
For motor control and digital power firmware, route PWM outputs (OC1-OC8 on port D) away from analog inputs AN0-AN16 and keep AVDD (pin 80) filtered with an RC (e.g., 10 ohm + 0.1 uF) from VDD to supply a quiet analog rail. The QEA/QEB/INDX quadrature pins on RB3-RB5 should be treated as fast digital signals with short returns. Use a solid ground plane under the TQFP and stitch VSS vias near each VSS pin for low-inductance return paths.
Estimated: at 40 MIPS with all peripherals active, core current is typically on the order of tens of mA from 3.3V, giving power dissipation well under 0.5 W in the 12 x 12 mm TQFP; theta_JA of a standard 4-layer board keeps junction rise below 25C at 85C ambient, comfortably within the I-grade rating. For high-pin-count I/O switching at full drive, verify with Microchip power estimation tools, but heatsinking is not required for this device class.
Compliance Information
Standard Microchip catalog device in lead-free TQFP package; RoHS/REACH statements per Microchip product page for this MPN. Not an automotive AEC-Q100 qualified part.
