DSPIC33FJ64MC506-I/PT - 16-bit DSC 40MIPS 64KB Flash | Microchip
MPN: DSPIC33FJ64MC506-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.9 | $7.90 |
| 10 | $7.1 | $71.00 |
| 100 | $6.4 | $640.00 |
| 500 | $5.8 | $2,900.00 |
| 1,000 | $5.3 | $5,300.00 |
DSPIC33FJ64MC506-I/PT Overview
A Digital Signal Controller combines the computational architecture of a Digital Signal Processor (DSP) with the peripheral set and ease of use of a microcontroller (MCU). Within the power-management and control hierarchy, DSCs sit between general-purpose MCUs and dedicated DSPs, making them the standard choice for closed-loop control loops that need multiply-accumulate (MAC) math, fast interrupt response, and precise PWM generation in one silicon device.
Key features include the dsPIC33F core at up to 40 MIPS, a hardware DSP engine with a 17-bit x 17-bit multiplier, dual 40-bit accumulators, and a barrel shifter for efficient data manipulation. The motor-control peripheral set provides multiple complementary PWM channels with fault inputs, plus high-speed ADC, input capture, output compare, UART, SPI, and I2C interfaces. The 64 KB Flash supports in-circuit serial programming (ICSP) with multiple PGECx/PGEDx pin pairs, and the device offers several low-power modes.
The dsPIC33F architecture is a modified Harvard, 16-bit RISC pipeline with DSP instructions executed in single cycles, allowing deterministic FOC (field-oriented control) and PID loop execution. Seamless migration paths to PIC24 MCUs and dsPIC30F DSCs in similar packages protect long-term firmware and PCB investment.
Typical applications include brushless DC (BLDC) and permanent-magnet synchronous motor (PMSM) drives, single- and 3-phase induction motor control, switched reluctance motors, digital power supplies, and uninterruptible power supplies (UPS).
Design consideration: the 3.3 V core-and-I/O supply requires clean decoupling at each VDD pin pair, and the 64-TQFP thermal pad region should be tied to a ground plane for lowest ground bounce in high-PWM-current layouts.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ64MC506-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 DSPIC33FJ64MC506-I/PT (same form factor and footprint) — differing in Package, Supply Voltage, Operating Temperature, RoHS Status, ADC Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ64MC506A-I/PT
✅ Drop-In✓ In Stock
$7.58 / Unit
View Datasheet →DSPIC33FJ64MC506AT-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ64MC506ATH/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128MC506-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64MC506H-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64MC506-I/PT Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F 16-bit DSC |
| Max CPU Speed | 40 MIPS |
| Program Memory Size | 64 KB (64K x 8) Flash |
| Supply Voltage | 3.0 V to 3.6 V (3.3 V nominal) |
| Operating Temperature | -40C to +85C (Industrial, I-grade) |
| Package | 64-TQFP (10x10 mm), 0.5 mm pitch |
| Mounting Type | Surface Mount |
| DSP Engine | 17x17-bit multiplier, dual 40-bit accumulators, barrel shifter |
| Motor Control PWM | Multiple complementary PWM outputs with fault inputs |
| ADC | 10-bit, high-speed ADC |
| Timers/Captures | Input Capture, Output Compare, general-purpose timers |
| Communication Interfaces | UART, SPI, I2C |
| Programming Interface | ICSP (multiple PGECx/PGEDx pairs, must be used as pairs) |
| Low Power Modes | Multiple sleep and idle modes |
| Migration Path | Seamless to PIC24 MCUs and dsPIC30F DSCs in similar packages |
| RoHS Status | Compliant |
DSPIC33FJ64MC506-I/PT Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low), programming voltage input |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / ADC positive reference / GPIO |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / ADC negative reference / GPIO |
| Pin 4 | AN2/SS1/LVDIN/CN4/RB2 — Analog input 2 / SPI slave select 1 / LVD input / GPIO |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / encoder index / GPIO |
| Pin 6 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / encoder A / input capture 7 / GPIO |
| Pin 7 | AN5/QEB/IC8/CN7/RB5 — Analog input 5 / encoder B / input capture 8 / GPIO |
| Pin 8 | AN6/OCFA/IC3/CN8/RB6 — Analog input 6 / PWM fault A / input capture 3 / GPIO |
| Pin 9 | AN7/OCFB/IC4/CN9/RB7 — Analog input 7 / PWM fault B / input capture 4 / GPIO |
| Pin 10 | AN8/T5CK/PWM4L1/RE0 — Analog input 8 / Timer5 clock / PWM4 low / GPIO |
| Pin 11 | AN9/T4CK/PWM4H1/RE1 — Analog input 9 / Timer4 clock / PWM4 high / GPIO |
| Pin 12 | AN10/T3CK/PWM4L2/RE2 — Analog input 10 / Timer3 clock / PWM4 low / GPIO |
| Pin 13 | AN11/T2CK/PWM4H2/RE3 — Analog input 11 / Timer2 clock / PWM4 high / GPIO |
| Pin 14 | AN12/T1CK/PWM4L3/CVREF/RE4 — Analog input 12 / Timer1 clock / PWM4 low / comparator ref / GPIO |
| Pin 15 | AN13/PWM4H3/RE5 — Analog input 13 / PWM4 high / GPIO |
| Pin 16 | AN14/PWM4L4/RE6 — Analog input 14 / PWM4 low / GPIO |
| Pin 17 | AN15/PWM4H4/RE7 — Analog input 15 / PWM4 high / GPIO |
| Pin 18 | VSS — Ground reference |
| Pin 19 | OSC1/CLKI/RC12 — Primary oscillator input / external clock input / GPIO |
| Pin 20 | OSC2/CLKO/RC15 — Primary oscillator output / clock output / GPIO |
| Pin 21 | VDD — Power supply (3.0 V to 3.6 V) |
| Pin 22 | SOSC1/T2CK/RC13 — Secondary oscillator input / Timer2 clock / GPIO |
| Pin 23 | SOSC2/T1CK/RC14 — Secondary oscillator output / Timer1 clock / GPIO |
| Pin 24 | VDD — Power supply |
| Pin 25 | RF2/SDI1/CN17 — SPI1 data in / GPIO |
| Pin 26 | RF3/SDO1/CN18 — SPI1 data out / GPIO |
| Pin 27 | RF4/CN19 — GPIO / peripheral function |
| Pin 28 | RF5/CN20 — GPIO / peripheral function |
| Pin 29 | AVSS — Analog ground |
| Pin 30 | AVDD — Analog power supply |
| Pin 31 | SCL1/RG2 — I2C1 clock / GPIO |
| Pin 32 | SDA1/RG3 — I2C1 data / GPIO |
| Pin 33 | VSS — Ground reference |
| Pin 34 | VDD — Power supply |
| Pin 35 | RG0 — GPIO / RTCC auxiliary function |
| Pin 36 | RG1 — GPIO |
| Pin 37 | RF12 — GPIO / peripheral function |
| Pin 38 | PGED3/RF13 — Programming data pair 3 / GPIO |
| Pin 39 | PGEC3/RF12 — Programming clock pair 3 / GPIO |
| Pin 40 | RD0/PWM1L1 — PWM1 low-side output 1 / GPIO |
| Pin 41 | RD1/PWM1H1 — PWM1 high-side output 1 / GPIO |
| Pin 42 | RD2/PWM1L2 — PWM1 low-side output 2 / GPIO |
| Pin 43 | RD3/PWM1H2 — PWM1 high-side output 2 / GPIO |
| Pin 44 | VDD — Power supply |
| Pin 45 | RD4/PWM2L1 — PWM2 low-side output 1 / GPIO |
| Pin 46 | RD5/PWM2H1 — PWM2 high-side output 1 / GPIO |
| Pin 47 | RD6/PWM2L2 — PWM2 low-side output 2 / GPIO |
| Pin 48 | RD7/PWM2H2 — PWM2 high-side output 2 / GPIO |
| Pin 49 | VSS — Ground reference |
| Pin 50 | RD8/PWM3L1 — PWM3 low-side output 1 / GPIO |
| Pin 51 | PGED2/RD9 — Programming data pair 2 / GPIO |
| Pin 52 | PGEC2/RD10 — Programming clock pair 2 / GPIO |
| Pin 53 | RD11/PWM3H1 — PWM3 high-side output 1 / GPIO |
| Pin 54 | RD12/PWM3L2 — PWM3 low-side output 2 / GPIO |
| Pin 55 | RD13/PWM3H2 — PWM3 high-side output 2 / GPIO |
| Pin 56 | VSS — Ground reference |
| Pin 57 | RD14/FLTA — PWM fault input A / GPIO |
| Pin 58 | RD15/FLTB — PWM fault input B / GPIO |
| Pin 59 | VDD — Power supply |
| Pin 60 | RF0 — GPIO / peripheral function |
| Pin 61 | RF1 — GPIO / peripheral function |
| Pin 62 | VDD — Power supply |
| Pin 63 | VSS — Ground reference |
| Pin 64 | VDD — Power supply |
Typical Applications
DSPIC33FJ64MC506-I/PT is suitable for 6 applications: Brushless DC (BLDC) Motor Control, PMSM Field-Oriented Control (FOC) Drives, Single- and 3-Phase Induction Motor Control, Digital Power Supplies and UPS, Switched Reluctance Motor (SRM) Drives, Industrial Automation and Embedded Control Nodes.
Brushless DC (BLDC) Motor Control
The DSPIC33FJ64MC506-I/PT is purpose-built for BLDC drives: its 40 MIPS dsPIC33F core executes trapezoidal or sensorless FOC commutation loops in deterministic time using the single-cycle 17x17-bit MAC and dual 40-bit accumulators, while the dedicated motor-control PWM module generates complementary output pairs with programmable dead time and hardware fault inputs for overcurrent shutdown. In a typical design the high-speed 10-bit ADC samples phase currents and the DC bus synchronized to the PWM center, closing the current loop at PWM frequency and the speed loop at a few kHz. Because the DSC integrates the DSP math, PWM, and ADC in one 3.3 V device, board area and BOM shrink versus discrete MCU-plus-DSP solutions. The 64 KB Flash accommodates sensorless observers and protection state machines with room for a bootloader.
Recommended
PMSM Field-Oriented Control (FOC) Drives
Permanent-magnet synchronous motor control with FOC demands fast Clark/Park transforms and PI current controllers executed every PWM cycle - exactly the workload the DSP engine of the DSPIC33FJ64MC506-I/PT was designed for. The dual 40-bit accumulators allow two concurrent current-loop integrators without overflow management, and the barrel shifter accelerates scaling of per-unit quantities. Hardware quadrature encoder interface inputs (QEA/QEB) and an index input connect directly to position sensors, while complementary PWM with dead-time insertion drives the three-phase inverter bridge through gate drivers. At 40 MIPS the device sustains 10-20 kHz current-loop rates with margin for speed observers and communication. Industrial-grade -40C to +85C operation suits servo and traction auxiliaries.
Recommended
Single- and 3-Phase Induction Motor Control
For induction motor drives, the DSPIC33FJ64MC506-I/PT implements V/f control or rotor-flux-estimating sensorless schemes, both of which Microchip identifies as target applications for the dsPIC33F Motor Control family. The 40 MIPS core runs the flux and torque estimators in fixed point, the ADC samples DC-link voltage and phase currents, and the PWM module scales from scalar V/f at low dynamics to full vector control at high dynamics without silicon changes. Multiple PWM channels cover 3-phase bridges, while hardware fault inputs provide cycle-by-cycle current limiting. The 64-TQFP offers enough I/O for contactor control, brake choppers, and keypad/UART human interfaces on the same chip, consolidating a complete drive controller in one DSC.
Recommended
Digital Power Supplies and UPS
Switch-mode power conversion - LLC, phase-shifted full bridge, and UPS inverters - benefits from the deterministic DSP math and fine-grained PWM of this DSC. The complementary PWM outputs with programmable dead time and fault trip implement phase management for bridge topologies, and the 10-bit ADC synchronized to the PWM eliminates sampling jitter that would otherwise appear as output ripple. The 40 MIPS core closes voltage and current loops at tens of kHz, executes soft-start and mode-transition state machines, and handles UART or I2C telemetry to a host controller. Using one DSPIC33FJ64MC506-I/PT for both control and housekeeping removes analog supervisory ICs, improving BOM consolidation while keeping protection latency in hardware.
Recommended
Switched Reluctance Motor (SRM) Drives
Microchip explicitly lists switched reluctance motor drives among the target applications of the dsPIC33FJ64MC506A family, and the original MC506 supports the same control structures. SRM control requires phase-by-phase torque mapping, asymmetric-bridge PWM switching, and rapid commutation decisions based on rotor position - tasks handled by the DSP engine's single-cycle MAC for lookup interpolation and the input-capture peripherals for position decoding. The multiple complementary PWM channels drive the unusual phase topologies of SRM converters, and hardware fault inputs enforce per-phase current limits. The industrial temperature rating and 3.3 V I/O simplify integration with gate-driver and current-sense front ends in rugged industrial and appliance environments.
Recommended
Industrial Automation and Embedded Control Nodes
Beyond motor drives, the DSPIC33FJ64MC506-I/PT serves as a high-performance industrial control node: UART, SPI, and I2C interfaces connect it to sensors, drives, and supervisory PLCs, while the DSP core performs filtering, FFT-based vibration monitoring, and closed-loop actuator control locally. Multiple low-power modes allow duty-cycled operation in battery-backed field equipment, and the barrel shifter accelerates protocol and scaling arithmetic. ICSP with multiple PGECx/PGEDx pairs supports field firmware updates through a bootloader in the 64 KB Flash. The 64-pin TQFP provides ample GPIO for relays, indicators, and safety interlocks, making the device a single-chip alternative to MCU-plus-external-DSP combinations on industrial PCBs.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ64MC506-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ64MC506A-I/PT | DSPIC33FJ64MC506AT-E/PT | DSPIC33FJ64MC506ATH/PT | DSPIC33FJ128MC506-I/PT |
|---|---|---|---|---|---|
| Package | 64-TQFP (10x10) | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TFQFP (10x10) - same | 64-TQFP (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Flash Program Memory | 64 KB | 64 KB | 64 KB | 64 KB | 128 KB |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +125C | -40C to +85C |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Silicon Revision / Qualification | Original silicon, industrial grade | A-revision (errata corrected) | A-revision, extended temp | Automotive / TS 16949 oriented | Industrial grade |
| Best Use Case | Cost-optimized motor control, standard industrial temp | New designs / errata-sensitive builds | High ambient temperature enclosures | Automotive and industrial automation | Larger firmware / bootloader headroom |
Key Differentiators
- Lowest-cost 64 KB member of the 64-pin MC506 motor-control family (vs DSPIC33FJ128MC506-I/PT)
- Extended-temperature drop-in available without PCB change (vs DSPIC33FJ64MC506AT-E/PT)
- Trade-off: original silicon carries published errata (vs DSPIC33FJ64MC506A-I/PT)
- Automotive qualification path on same footprint (vs DSPIC33FJ64MC506ATH/PT)
Design Notes
The DSPIC33FJ64MC506-I/PT requires a regulated 3.0 V to 3.6 V supply for all VDD pins, including AVDD. In motor-drive layouts, PWM switching injects noise into the digital rail; use a dedicated LDO or filtered buck output, place 100 nF ceramics at every VDD/VSS pair within 2 mm of the pins, and feed AVDD through an RC (10 ohm + 1 uF) or ferrite filter so ADC current-sense readings remain accurate during bridge switching. Budget roughly 60-80 mA of supply current at 40 MIPS plus I/O load as a design estimate - confirm against the datasheet current-consumption tables for your clock configuration.
Route PGECx/PGEDx as matched pairs: per Microchip documentation the device offers more than one ICSP pair and any pair may be used, but ICSPCLK and ICSPDAT must come from the same pair (e.g., PGEC2 with PGED2). Bring the selected pair plus MCLR, VDD, and VSS to a standard 5-pin programming header. Keep PWM outputs (PORTD) away from analog inputs on RB0-RB7, and pour a continuous ground plane under the TQFP connecting all VSS pins to limit ground bounce during simultaneous high-side switching.
Do not assume the 'A'-revision errata status transfers to the original silicon: Microchip publishes a separate Silicon Errata for the dsPIC33FJ64MC506 family, and the MC506A exists precisely to correct those issues - new production designs should default to the MC506A. Also verify oscillator startup: the primary OSC1/OSC2 circuit and secondary SOSC1/SOSC2 require correct crystal loading capacitors, and firmware must poll the oscillatory-fail-safe status before switching clocks. Finally, hardware PWM fault inputs (FLTA/FLTB) must be enabled in firmware; leaving them unconfigured removes the hardware overcurrent trip path.
Compliance Information
RoHS compliance per Microchip product listing for the -I/PT ordering code. Automotive qualification applies to the separate ATH ordering variant (TS 16949 oriented), not this part.
