DSPIC33FJ64MC508A-I/PT - 16-bit DSC 40MIPS 64KB Flash | Microchip
MPN: DSPIC33FJ64MC508A-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.59 | $14.59 |
| 10 | $13.9 | $139.00 |
| 25 | $13.42 | $335.50 |
| 100 | $12.95 | $1,295.00 |
| 1,000 | $11.8 | $11,800.00 |
DSPIC33FJ64MC508A-I/PT Overview
A digital signal controller combines the compute power of a DSP with the peripheral integration and ease of use of a microcontroller. In the power-management hierarchy, the dsPIC33F family sits between general-purpose MCUs and standalone DSPs, making it the natural choice for closed-loop digital control systems such as switched-mode power supplies and motor drives.
Key features include the 40 MIPS dsPIC33F core with DSP engine (dual 40-bit accumulators, 17-bit x 17-bit single-cycle MAC), 64 KB flash with self-programming, 8 KB SRAM, CAN 2.0B, multiple UART/SPI/I2C ports, and motor control PWM (MCPWM) outputs with dead-time insertion and fault inputs. The A-suffix revision improves upon the original dsPIC33FJ64MC508 with enhanced analog and peripheral behavior.
The architecture executes digital filter algorithms, high-speed precision digital control loops, and digital audio/speech processing efficiently. Five 16-bit timers, an input capture/output compare bank, and a 10-bit ADC with simultaneous multi-channel sampling support sensorless FOC and field-oriented motor algorithms at loop rates unattainable on general-purpose MCUs.
Typical applications include brushless DC motor control, single and 3-phase induction motor drives, switched reluctance motor control, uninterruptible power supplies, digital power conversion, and CAN-networked industrial nodes.
Design consideration: the dsPIC33FJ core requires a VCAP/ENVREG pin connection to regulate the internal 2.5V core supply - tie ENVREG to VDD for internal regulation and place a low-ESR 10 uF capacitor on VCAP. Decouple each VDD pin with 0.1 uF ceramics.
This page synthesizes distributor pricing, pin-compatible drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ64MC508A-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 DSPIC33FJ64MC508A-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:
DSPIC33FJ64MC508-I/PT
✅ Drop-In✓ In Stock
$10.95 / Unit
View Datasheet →DSPIC33FJ128MC508A-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ256MC508A-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GP708A-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.18 / Unit
View Datasheet →DSPIC33FJ128GP708A-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$11.8 / Unit
View Datasheet →DSPIC33FJ64MC508A-I/PT Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F, 16-bit |
| Max CPU Speed | 40 MIPS |
| Program Memory Size | 64 KB (64K x 8) Flash |
| SRAM Size | 8 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 80-TQFP (12x12 mm), PT |
| Mounting Type | Surface Mount |
| CAN | 1x CAN 2.0B |
| UART | 2x UART |
| SPI | 2x SPI |
| I2C | 2x I2C |
| Timers | 5x 16-bit |
| ADC | 10-bit, high-speed |
| Motor Control PWM | MCPWM with dead-time insertion and fault inputs |
| Input Capture / Output Compare | Available |
| RoHS Status | Compliant |
| Packaging | Tray |
DSPIC33FJ64MC508A-I/PT Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low), programming voltage input |
| Pin 2 | AN0/VREF+/CN2B/RB0 — Analog input 0 / ADC positive reference |
| Pin 3 | AN1/VREF-/CN3B/RB1 — Analog input 1 / ADC negative reference |
| Pin 4 | AN2/SS1/CN4B/RB2 — Analog input 2 / SPI1 slave select |
| Pin 5 | AN3/INDX/CN5B/RB3 — Analog input 3 / QEI index input |
| Pin 6 | AN4/QEA/IC7/CN6B/RB4 — Analog input 4 / QEI phase A / input capture 7 |
| Pin 7 | AN5/QEB/IC8/CN7B/RB5 — Analog input 5 / QEI phase B / input capture 8 |
| Pin 8 | AN6/OCFA/CN8B/RB6 — Analog input 6 / PWM fault A input |
| Pin 9 | AN7/FLTA/CN9B/RB7 — Analog input 7 / PWM fault A input |
| Pin 10 | AN8/PWM1H1/CN10B/RB8 — Analog input 8 / motor PWM1 high output |
| Pin 11 | AN9/PWM1L1/CN11B/RB9 — Analog input 9 / motor PWM1 low output |
| Pin 12 | VSS — Ground reference |
| Pin 13 | VDD — Positive supply, 3.0V to 3.6V |
| Pin 14 | AN10/PWM1H2/CN12B/RB10 — Analog input 10 / motor PWM2 high output |
| Pin 15 | AN11/PWM1L2/CN13B/RB11 — Analog input 11 / motor PWM2 low output |
| Pin 16 | AN12/PWM1H3/CN14B/RB12 — Analog input 12 / motor PWM3 high output |
| Pin 17 | AN13/PWM1L3/CN15B/RB13 — Analog input 13 / motor PWM3 low output |
| Pin 18 | AN14/PWM1H4/CN16B/RB14 — Analog input 14 / motor PWM4 high output |
| Pin 19 | AN15/PWM1L4/CN17B/RB15 — Analog input 15 / motor PWM4 low output |
| Pin 20 | VCAP/ENVREG — Core regulator capacitor / internal regulator enable |
| Pin 21 | AVDD — Analog positive supply |
| Pin 22 | AVSS — Analog ground |
| Pin 23 | TCK — JTAG test clock |
| Pin 24 | TDI — JTAG test data in |
| Pin 25 | TDO — JTAG test data out |
| Pin 26 | TMS — JTAG test mode select |
| Pin 27 | PGEC3 — ICSP clock channel 3 |
| Pin 28 | PGED3 — ICSP data channel 3 |
| Pin 29 | PGEC2 — ICSP clock channel 2 |
| Pin 30 | PGED2 — ICSP data channel 2 |
| Pin 31 | PGEC1 — ICSP clock channel 1 |
| Pin 32 | PGED1 — ICSP data channel 1 |
| Pin 33 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Pin 34 | OSC2/CLKO/RC15 — Oscillator crystal output / clock output |
| Pin 35 | SOSCI/CN1/RC13 — Secondary oscillator input / port pin |
| Pin 36 | SOSCO/T1CK/CN0/RC14 — Secondary oscillator output / Timer1 clock |
| Pin 37 | RE0 — Port E, bit 0 |
| Pin 38 | RE1 — Port E, bit 1 |
| Pin 39 | RE2 — Port E, bit 2 |
| Pin 40 | RE3 — Port E, bit 3 |
| Pin 41 | VDD — Positive supply, 3.0V to 3.6V |
| Pin 42 | VSS — Ground reference |
| Pin 43 | RE4 — Port E, bit 4 |
| Pin 44 | RE5 — Port E, bit 5 |
| Pin 45 | RE6 — Port E, bit 6 |
| Pin 46 | RE7 — Port E, bit 7 |
| Pin 47 | RE8 — Port E, bit 8 |
| Pin 48 | RE9 — Port E, bit 9 |
| Pin 49 | RF1/C1TX — Port F, bit 1 / CAN1 transmit |
| Pin 50 | RF0/C1RX — Port F, bit 0 / CAN1 receive |
| Pin 51 | RF4 — Port F, bit 4 |
| Pin 52 | RF5 — Port F, bit 5 |
| Pin 53 | RF2/SDI1 — Port F, bit 2 / SPI1 data in |
| Pin 54 | RF3/SDO1 — Port F, bit 3 / SPI1 data out |
| Pin 55 | RF6/SCK1 — Port F, bit 6 / SPI1 clock |
| Pin 56 | RF7/SS1 — Port F, bit 7 / SPI1 slave select |
| Pin 57 | RF8 — Port F, bit 8 |
| Pin 58 | RF12 — Port F, bit 12 |
| Pin 59 | RF13 — Port F, bit 13 |
| Pin 60 | VDD — Positive supply, 3.0V to 3.6V |
| Pin 61 | VSS — Ground reference |
| Pin 62 | RG0 — Port G, bit 0 |
| Pin 63 | RG1 — Port G, bit 1 |
| Pin 64 | RG2/SDA2 — Port G, bit 2 / I2C2 data |
| Pin 65 | RG3/SCL2 — Port G, bit 3 / I2C2 clock |
| Pin 66 | RG6/SCK2 — Port G, bit 6 / SPI2 clock |
| Pin 67 | RG7/SDI2 — Port G, bit 7 / SPI2 data in |
| Pin 68 | RG8/SDO2 — Port G, bit 8 / SPI2 data out |
| Pin 69 | RG9/SS2 — Port G, bit 9 / SPI2 slave select |
| Pin 70 | VSS — Ground reference |
| Pin 71 | VDD — Positive supply, 3.0V to 3.6V |
| Pin 72 | RG12 — Port G, bit 12 |
| Pin 73 | RG13 — Port G, bit 13 |
| Pin 74 | RG14 — Port G, bit 14 |
| Pin 75 | RD0/IC1 — Port D, bit 0 / input capture 1 |
| Pin 76 | RD1/OC1 — Port D, bit 1 / output compare 1 |
| Pin 77 | RD2/IC2 — Port D, bit 2 / input capture 2 |
| Pin 78 | RD3/OC2 — Port D, bit 3 / output compare 2 |
| Pin 79 | RD4/IC3 — Port D, bit 4 / input capture 3 |
| Pin 80 | RD5/OC3 — Port D, bit 5 / output compare 3 |
Typical Applications
DSPIC33FJ64MC508A-I/PT is suitable for 6 applications: Brushless DC Motor Control, Single and 3-Phase Induction Motor Drives, Uninterruptible Power Supplies (UPS), Switched Reluctance Motor Control, Industrial CAN Networking Nodes, Digital Power Conversion.
Brushless DC Motor Control
The DSPIC33FJ64MC508A-I/PT is purpose-built for BLDC drives: its 40 MIPS DSP core closes current-loop FOC or trapezoidal commutation algorithms with single-cycle 17x17 MAC operations, while the MCPWM module generates complementary PWM pairs with hardware dead-time insertion and fault inputs for inverter protection. The 10-bit ADC samples phase currents and bus voltage simultaneously for sensorless or hall-based control. Placed at the heart of a three-phase inverter with a gate driver such as the MCP802x or IR21xx family, the DSC achieves kHz-rate current loops and smooth low-speed torque. The 64 KB flash accommodates the full control stack, field weakening, and a CAN or UART diagnostic layer without external memory.
Recommended
Single and 3-Phase Induction Motor Drives
According to Microchip, the dsPIC33FJ64MC508A family directly supports single and 3-phase induction motor applications. The 40 MIPS core executes V/f scalar control or rotor-flux-oriented control at the sampling rates these drives demand, and the motor-control PWM's complementary outputs with dead-time insertion drive the IGBT/MOSFET bridge safely. Five 16-bit timers and the input capture peripherals handle encoder or resolver feedback, while the CAN 2.0B module integrates the drive into industrial fieldbus networks. The industrial -40C to +85C rating suits factory floor environments, and the 3.0V-3.6V rail simplifies integration with 3.3V logic isolators and communication transceivers on the drive control board.
Recommended
Uninterruptible Power Supplies (UPS)
Microchip positions the dsPIC33F motor-control DSCs as well-suited for uninterruptible power supplies. The DSPIC33FJ64MC508A-I/PT executes the multi-loop inverter regulation (voltage outer loop, current inner loop) needed for clean sine-wave output at 40 MIPS, with the DSP engine handling the digital filter and PI computations deterministically. Its 10-bit ADC captures AC output, battery current, and DC bus simultaneously; the MCPWM module generates the inverter and PFC switching patterns. The CAN interface enables parallel-UPS current sharing and supervisory communication. The 64 KB flash stores control firmware plus logging and bootloader functions, and the industrial temperature grade fits the harsh thermal environment inside UPS enclosures.
Recommended
Switched Reluctance Motor Control
Switched reluctance (SR) motors require precise, per-phase current chopping with asymmetric excitation - exactly what the DSPIC33FJ64MC508A-I/PT's MCPWM module provides with independently controlled complementary outputs and cycle-by-cycle current limiting via fault inputs. The 40 MIPS DSP core runs torque-ripple-minimization algorithms that need heavy multiplication throughput, and the 10-bit ADC's simultaneous multi-channel sampling captures the unipolar phase currents SR machines require. Microchip explicitly lists switched reluctance motors among the family's supported applications. The 80-pin TQFP gives enough port pins for gate control, current sensing, position feedback, and a CAN or UART link to the host controller in industrial SR drive systems.
Recommended
Industrial CAN Networking Nodes
The integrated CAN 2.0B controller makes the DSPIC33FJ64MC508A-I/PT a strong single-chip solution for industrial automation nodes that also need real-time local control. RS Components highlights that the dsPIC33F family offers 'the performance of a DSP with the simplicity of an MCU,' letting one 40 MIPS part handle protocol handling, sensor processing, and actuator control without a second processor. Two UARTs, two SPIs, and two I2C ports connect to HMIs, EEPROMs, and sensor front-ends, while the 64 KB flash holds the full protocol stack. The industrial -40C to +85C rating and 3.0V-3.6V supply match standard 3.3V CAN transceiver designs for factory automation and building control networks.
Recommended
Digital Power Conversion
The DSPIC33FJ64MC508A-I/PT serves in digitally controlled power conversion stages - PFC front-ends, LLC resonant converters, and DC-AC inverters - where its 40 MIPS core closes control loops at hundreds of kHz of effective bandwidth. The high-speed 10-bit ADC samples output voltage and inductor current with precise trigger synchronization from the MCPWM module, enabling phase-shifted and complementary drive topologies with hardware dead-time control. The 17x17 MAC DSP engine computes the notch and lead-lag compensators these converters need. For heavier power-stage control, it pairs naturally with the GS-series digital power DSCs in multi-stage architectures. The 64 KB flash retains calibration tables and firmware upgrade capability in the field.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ64MC508A-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ64MC508-I/PT | DSPIC33FJ128MC508A-I/PT | DSPIC33FJ256MC508A-I/PT | DSPIC33FJ64GP708A-I/PT |
|---|---|---|---|---|---|
| Package | 80-TQFP (12x12 mm), PT | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same | 80-TQFP (12x12) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max CPU Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Program Flash | 64 KB | 64 KB | 128 KB | 256 KB | 64 KB |
| Motor Control PWM (MCPWM) | Yes | Yes | Yes | Yes | No (GP output compare) |
| CAN 2.0B | 1x | 1x | 1x | 1x | 1x |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Die Revision | A (enhanced) | Original (non-A) | A (enhanced) | A (enhanced) | A (enhanced) |
Key Differentiators
- Enhanced A-revision silicon (vs DSPIC33FJ64MC508-I/PT)
- Lowest-cost entry to 80-pin MC family (vs DSPIC33FJ128MC508A-I/PT)
- Motor-control PWM with dead-time insertion (vs DSPIC33FJ64GP708A-I/PT)
Design Notes
The dsPIC33FJ core requires the on-chip regulator to be configured at power-up. Tie ENVREG to VDD to enable the internal 2.5V core regulator and place a low-ESR, temperature-stable 10 uF ceramic capacitor (X7R/X5R) directly on the VCAP pin. Do not drive VCAP externally when ENVREG is high. Decouple every VDD pin with 0.1 uF ceramic capacitors placed within 2 mm of the pin, and connect AVDD/AVSS to a quiet analog supply, ideally via an RC or ferrite filter from the digital rail to preserve ADC accuracy.
For the 80-TQFP (12x12 mm) footprint, use a solid ground plane on layer 2 and place the 0.1 uF VDD decoupling capacitors on the component side close to pins 12, 41, 60, 70 (VSS) and 13, 41, 60, 71 (VDD groups). Route motor PWM outputs (complementary pairs with dead-time insertion) away from the analog input traces feeding the ADC to prevent switching noise coupling into current-sense channels. Keep the CAN pairs RF0/RF1 routed as a controlled-impedance differential pair to the transceiver.
The '-I' grade is rated to +85C ambient only - do not substitute this part into designs qualified for extended temperature; order the -E suffix variant instead. The non-A revision (DSPIC33FJ64MC508-I/PT) is drop-in compatible but has older silicon errata; always check the current Microchip errata document for your die revision before locking the design. When using the EC or XT oscillator modes, respect the load capacitance specified for the crystal to guarantee startup across the full -40C to +85C range.
When driving IGBT/MOSFET gate circuitry from the MCPWM outputs, keep the trace impedance low and add series resistors (22-100 ohm) near the DSC pins to damp ringing into long gate-driver traces. The fault inputs (FLTA/OCFA) are intended for cycle-by-cycle current limiting - terminate them actively (pull-up/pull-down as appropriate) so a broken sensor wire does not float the fault state and stall or free-run the motor inverter.
Compliance Information
RoHS compliant and lead-free per distributor classifications (DigiKey, LCSC). AEC-Q100 qualification not stated in provided data for this exact ordering code.
