DSPIC33FJ64MC508-I/PT - 16-bit DSC 40 MIPS 64KB Flash | Microchip
MPN: DSPIC33FJ64MC508-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $15.51 | $15.51 |
| 10 | $14.35 | $143.50 |
| 100 | $12.9 | $1,290.00 |
| 500 | $11.8 | $5,900.00 |
| 1,000 | $10.95 | $10,950.00 |
DSPIC33FJ64MC508-I/PT Overview
A Digital Signal Controller combines the computational throughput of a DSP with the peripheral integration and ease of use of a microcontroller (MCU). Within the power-management hierarchy of embedded control, a DSC sits above general-purpose MCUs for control-loop-intensive tasks: the dsPIC33F core executes DSP instructions (MAC, DSP multiply, modulo addressing) that make high-speed digital control loops, digital filters, and digital audio processing practical on a single chip. The dsPIC33FJ64MC508 belongs to the dsPIC33FJXXXMCX06/X08/X10 Motor Control family, which Microchip positions for seamless migration to/from PIC24 MCUs and dsPIC30F DSCs in similar packages.
Key features include the 16-bit dsPIC33F core operating at up to 40 MIPS, 64KB of self-programmable Flash, on-chip DSP engine, motor-control-oriented peripherals (PWM and ADC modules), and multiple PGECx/PGEDx pin pairs supporting In-Circuit Serial Programming (ICSP) and in-circuit debugging with tools such as MPLAB SNAP. The part operates from a 3.3V supply per the dsPIC33F family architecture.
From a technical standpoint, the dsPIC33FJXXXMCX06/X08/X10 family is designed to execute digital filter algorithms, high-speed precision digital control loops, and digital audio and speech processing. The MC (Motor Control) peripheral set in the -MC508 variant provides hardware PWM resources and fast ADC sampling suited to field-oriented control and other servo-loop topologies, while Boundary-Scan (JTAG BSDL) data is published for the 80-pin TQFP package for manufacturing test.
Typical applications include brushless DC and permanent-magnet motor drives, digital power supplies (Power Factor Correction, LLC control), inverters and solar converters, and embedded control systems requiring DSP-class math with MCU-class peripherals.
Design consideration: the device exposes more than one pair of PGECx/PGEDx programming pins; ICSPCLK and ICSPDAT must be used as a matched pair (e.g., PGEC2 with PGED2), and all VDD/VSS pins must be connected or programming may fail.
This page synthesizes verified distributor pricing, drop-in same-family alternatives, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ64MC508-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 DSPIC33FJ64MC508-I/PT (same form factor and footprint) — differing in Package, Core Architecture, ADC, I2C, Input Capture / Output Compare.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ64MC508A-I/PT
✅ Drop-In✓ In Stock
$11.8 / Unit
View Datasheet →DSPIC33FJ128MC508-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ256MC508-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GP708A-I/PT
✅ Drop-In✓ In Stock
$4.18 / Unit
View Datasheet →DSPIC33FJ64MC508-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ64MC508-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F DSC |
| Maximum CPU Speed | 40 MIPS |
| Internal Clock Frequency | 160 MHz (per LCSC listing) |
| Program Memory Size | 64KB (64K x 8) Flash |
| Program Memory Type | Flash |
| Supply Voltage | 3.3 V (per dsPIC33F family) |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 80-TQFP (12 x 12 mm) |
| Mounting Type | Surface Mount |
| Product Family | dsPIC33FJXXXMCX06/X08/X10 Motor Control |
| Peripheral Family | Motor Control (MC) |
| Programming Interface | ICSP via PGECx/PGEDx pairs |
| Debugging Support | In-circuit debugging (MPLAB SNAP) |
| Boundary Scan | BSDL file available for 80-TQFP |
| Migration Path | Seamless to/from PIC24 MCUs and dsPIC30F DSCs |
DSPIC33FJ64MC508-I/PT 80-tqfp (12 x 12 mm) Pin Configuration Guide
Pin configuration for DSPIC33FJ64MC508-I/PT (80-tqfp (12 x 12 mm) 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 DSPIC33FJ64MC508-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ64MC508-I/PT is suitable for 6 applications: BLDC / PMSM Motor Drives, Digital Power Supplies (PFC / LLC), Solar Inverters and Power Conversion, Digital Audio and Speech Processing, Industrial Automation and Servo Systems, Embedded Control with ICSP-Based Production Programming.
BLDC / PMSM Motor Drives
The DSPIC33FJ64MC508-I/PT is purpose-built for brushless DC and permanent-magnet synchronous motor control as a member of the dsPIC33FJXXXMCX06/X08/X10 Motor Control family. Its 40 MIPS 16-bit DSP core executes field-oriented control mathematics - Clarke and Park transforms, PI current loops, and space-vector PWM generation - within tight loop deadlines, while the Motor Control peripheral set provides dedicated PWM outputs and fast ADC sampling synchronized to the PWM period. In a typical three-phase inverter, the ADC samples phase currents at the PWM center, the core closes the current loop, and the PWM module drives the gate drivers, achieving deterministic loop rates in the tens of kilohertz that a general-purpose MCU cannot sustain.
Recommended
Digital Power Supplies (PFC / LLC)
The 40 MIPS dsPIC33F core of the DSPIC33FJ64MC508-I/PT makes it viable for digitally controlled switch-mode power supplies, including Power Factor Correction front-ends and LLC resonant converters. Microchip designs the dsPIC33F family specifically to execute digital filter algorithms and high-speed precision digital control loops - exactly the workload of a voltage-mode or current-mode SMPS compensator running at switching frequencies of 100 kHz to several hundred kilohertz. The controller samples output voltage and inductor current via its ADC, executes the compensator with DSP MAC instructions in single cycles, and updates the PWM duty cycle. Note that for the most demanding digital-power topologies, Microchip's dedicated GS family (e.g., DSPIC33FJ64GS608) adds high-resolution PWM that reduces duty-cycle quantization.
Recommended
Solar Inverters and Power Conversion
Grid-tied and off-grid solar inverters require simultaneous maximum-power-point tracking, DC-bus regulation, and grid-synchronization control - a workload matched to the DSPIC33FJ64MC508-I/PT's 40 MIPS core and 64KB Flash. The DSP engine's single-cycle multiply-accumulate and modulo addressing accelerate the MPPT search algorithm and the notch/sequence filters used in grid synchronization, while the motor-control-class PWM and ADC peripherals handle the power-stage control loops. Because the dsPIC33F family offers seamless migration to larger Flash and pin-compatible variants in similar packages, an inverter platform can scale from the 64KB MC508 to the 256KB DSPIC33FJ256MC508 without redesigning the control PCB footprint.
Recommended
Digital Audio and Speech Processing
Microchip specifies the 40 MIPS dsPIC33F core for digital audio and speech processing, and the DSPIC33FJ64MC508-I/PT fits audio effect units, active crossovers, and speech pre-processing systems. The DSP engine performs single-cycle MAC operations required for FIR and IIR filtering at audio sample rates (48 kHz stereo leaves ample MIPS headroom at 40 MIPS), and modulo addressing supports circular sample buffers without software overhead. With 64KB of self-programmable Flash, coefficient tables and effect algorithms fit comfortably. For audio-oriented designs that need fewer motor-control peripherals, the pin-compatible GP family member (DSPIC33FJ64GP708A-I/PT) in the same 80-TQFP package offers a general-purpose peripheral map instead.
Recommended
Industrial Automation and Servo Systems
In factory automation, the DSPIC33FJ64MC508-I/PT serves as the motion controller in servo drives, robotic joint actuators, and CNC axis controllers. Its -40C to +85C industrial temperature rating suits cabinet-mounted and machine-mounted environments, and the 80-pin TQFP provides the I/O count needed for encoder interfaces, limit switches, communication transceivers, and gate-drive outputs on one chip. The 40 MIPS core closes position, velocity, and current cascaded loops deterministically, while the 64KB Flash holds the motion profile planner. The published BSDL (boundary-scan) file for the 80-TQFP supports JTAG-based manufacturing test on automated production lines, improving board-level fault coverage.
Recommended
Embedded Control with ICSP-Based Production Programming
The DSPIC33FJ64MC508-I/PT integrates cleanly into production workflows that rely on In-Circuit Serial Programming (ICSP). The device exposes multiple PGECx/PGEDx pin pairs, and per the family documentation the ICSPCLK and ICSPDAT signals must be routed as a matched pair (for example PGEC2 with PGED2); all VDD and VSS pins must be connected or programming may fail. With a low-cost MPLAB SNAP debugger connected over USB via an 8-pin SIL header, the same two-pin interface performs both in-circuit debugging and field firmware updates. This makes the part attractive for appliances, pumps, and HVAC equipment where service technicians reflash firmware without removing the board.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ64MC508-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ64MC508A-I/PT | DSPIC33FJ128MC508-I/PT | DSPIC33FJ256MC508-I/PT | DSPIC33FJ64GP708A-I/PT | DSPIC33FJ64MC508-E/PT |
|---|---|---|---|---|---|---|
| Package | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - 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 |
| Program Flash | 64KB (64K x 8) | 64KB (64K x 8) | 128KB | 256KB | 64KB (64K x 8) | 64KB (64K x 8) |
| Peripheral Specialization | Motor Control (MC) | Motor Control (MC) | Motor Control (MC) | Motor Control (MC) | General Purpose (GP) | Motor Control (MC) |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (E grade) |
| Drop-in Compatibility | Reference (80-TQFP footprint) | Pin-to-pin, no PCB change | Pin-to-pin, no PCB change | Pin-to-pin, no PCB change | Pin-to-pin, no PCB change | Pin-to-pin, no PCB change |
Key Differentiators
- Corrected A-step silicon available drop-in (vs DSPIC33FJ64MC508A-I/PT)
- Pin-compatible Flash upgrade path (vs DSPIC33FJ256MC508-I/PT)
- Extended temperature option (vs DSPIC33FJ64MC508-E/PT)
- Honest trade-off: GP variant vs MC specialization (vs DSPIC33FJ64GP708A-I/PT)
Design Notes
The dsPIC33FJ64MC508 provides more than one pair of PGECx/PGEDx programming pins, but they must be used as matched pairs: if PGEC2 carries ICSPCLK, then ICSPDAT must connect to PGED2. Mixing pairs from different indices causes programming failure. Additionally, all VDD and VSS pins must be connected - leaving any supply pin unconnected can make ICSP programming fail even though the core appears powered. Route the chosen PGECx/PGEDx pair to a standard ICSP header on every design.
The 80-TQFP (12x12 mm) package places supply pins at multiple locations around the die; decouple every VDD/VSS pair with 100 nF ceramic capacitors placed within 2 mm of the pin, plus one bulk 4.7-10 uF capacitor near the device. Connect the exposed pattern under the TQFP to a solid ground plane with thermal-relief vias. The published BSDL file for this TQFP enables boundary-scan test chains - reserve JTAG access on production test fixtures if board-level fault coverage is required.
The dsPIC33F family operates from a 3.3V supply. Estimated: at 40 MIPS with all peripherals active, core current is typically in the tens of milliamps range (consult the family datasheet electrical characteristics tables for exact figures), so budget the 3.3V rail regulator accordingly and add margin for I/O loads driving motor-control gate circuitry. Separate the analog supply path to the ADC with an RC or ferrite filter from the digital rail to preserve ADC accuracy in motor-control current-sampling loops.
When driving external MOSFET gate drivers from the motor-control PWM outputs, keep PWM traces short and away from ADC sampling lines to prevent switching transients from corrupting current-feedback samples. Synchronize ADC sampling to the PWM center (center-aligned trigger) so current is measured when ripple is minimal - this is the standard dsPIC33F motor-control reference design pattern in Microchip application notes.
Compliance Information
Compliance status not stated in the provided verified data; confirm RoHS/REACH status on the Microchip product page or distributor compliance certificates.
