DSPIC33FJ64MC802T-I/SO - 16-Bit DSC 64KB Motor Control | Microchip
MPN: DSPIC33FJ64MC802T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.53 | $5.53 |
| 10 | $5.09 | $50.90 |
| 100 | $4.65 | $465.00 |
| 500 | $4.28 | $2,140.00 |
| 1,000 | $3.95 | $3,950.00 |
DSPIC33FJ64MC802T-I/SO Overview
A Digital Signal Controller (DSC) is a hybrid device that combines the real-time control peripherals and interrupt behavior of a microcontroller (MCU) with the single-cycle multiply-accumulate (MAC) arithmetic and barrel shifter of a digital signal processor (DSP). In the system hierarchy, a DSC sits between a general-purpose MCU and a dedicated DSP: it is a member of the embedded processor and controller category, under the broader semiconductor and integrated circuit taxonomy. The dsPIC33F architecture executes most instructions in a single cycle, enabling deterministic control loops that pure MCUs cannot match.
Key differentiators of the DSPIC33FJ64MC802T-I/SO include its 40 MIPS core, 64 KB Flash, 16 KB SRAM, 8-channel DMA, and a dedicated motor-control PWM with complementary outputs and dead-time insertion. The device is pin-compatible with the PIC24HJ family and highly compatible with dsPIC30F devices, enabling seamless migration across Microchip's 16-bit portfolio.
The device uses a modified Harvard architecture with a 16-bit data path and 24-bit instruction words, supported by a barrel shifter and hardware divider. Its nanoWatt power management supports multiple sleep and idle modes for energy-sensitive designs, while the on-chip CAN module enables industrial networking without an external controller.
Typical applications include three-phase brushless DC (BLDC) motor control, field-oriented control (FOC) of permanent-magnet synchronous motors (PMSM), digital power supplies, and automotive sensorless motor drives. The combination of 40 MIPS throughput and hardware PWM makes it well suited to closed-loop current and speed control at switching frequencies up to tens of kHz.
When designing with this device, keep the analog supply (AVDD/AVSS) well decoupled from the digital rail and route the motor-control PWM outputs away from the ADC input traces to preserve conversion accuracy. The 28-pin SOIC package limits available I/O, so peripheral pin selection (PPS) should be planned early.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers a single reference for selection, replacement, and layout decisions.
Drop-in alternatives for DSPIC33FJ64MC802T-I/SO — 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 DSPIC33FJ64MC802T-I/SO (same form factor and footprint) — differing in Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ64MC802-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ64MC802T-E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ64MC202T-I/SO
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →DSPIC33FJ64MC802T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F DSC (modified Harvard) |
| Maximum CPU Speed | 40 MIPS |
| Program Memory (Flash) | 64 KB (64K x 8) |
| Data Memory (SRAM) | 16 KB |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 28-pin SOIC (0.295", 7.50 mm) |
| Mounting Type | Surface Mount |
| Terminal Pitch | 1.27 mm |
| Motor Control PWM Channels | Up to 6 (complementary pairs with dead-time) |
| ADC Resolution | 10-bit |
| DMA Channels | 8 |
| CAN Module | Yes (1x ECAN) |
| Timers | 5x 16-bit |
| UART / SPI / I2C | 2 / 2 / 2 |
| Barrel Shifter | Yes |
| Boundary Scan (JTAG) | Yes |
| RoHS Status | Compliant (ROHS3) |
DSPIC33FJ64MC802T-I/SO Pin Configuration
| Pin 1 | MCLR — Master clear (active-low reset) |
| Pin 2 | EMUD2/AN0 — Emulator data / analog input AN0 |
| Pin 3 | AN1 — Analog input AN1 |
| Pin 4 | AN2 — Analog input AN2 |
| Pin 5 | AN3 — Analog input AN3 |
| Pin 6 | AN4 — Analog input AN4 |
| Pin 7 | AN5 — Analog input AN5 |
| Pin 8 | VSS — Ground |
| Pin 9 | OSC1/CLKI — Primary oscillator input / external clock input |
| Pin 10 | OSC2/CLKO — Primary oscillator output / clock output |
| Pin 11 | VDD — Positive supply (3.0 V to 3.6 V) |
| Pin 12 | PGD1/EMUD1 — Programming data / emulator data |
| Pin 13 | PGC1/EMUC1 — Programming clock / emulator clock |
| Pin 14 | PWM1H — Motor control PWM high output 1 |
| Pin 15 | PWM1L — Motor control PWM low output 1 |
| Pin 16 | PWM2H — Motor control PWM high output 2 |
| Pin 17 | PWM2L — Motor control PWM low output 2 |
| Pin 18 | PWM3H — Motor control PWM high output 3 |
| Pin 19 | PWM3L — Motor control PWM low output 3 |
| Pin 20 | C1TX/RF0 — ECAN transmit / digital I/O |
| Pin 21 | C1RX/RF1 — ECAN receive / digital I/O |
| Pin 22 | U1TX/RF2 — UART1 transmit / digital I/O |
| Pin 23 | U1RX/RF3 — UART1 receive / digital I/O |
| Pin 24 | SDA1/RF4 — I2C1 data / digital I/O |
| Pin 25 | SCL1/RF5 — I2C1 clock / digital I/O |
| Pin 26 | AVDD — Analog positive supply |
| Pin 27 | AVSS — Analog ground |
| Pin 28 | VDD — Positive supply (3.0 V to 3.6 V) |
Typical Applications
DSPIC33FJ64MC802T-I/SO is suitable for 6 applications: Three-Phase BLDC Motor Control, Field-Oriented Control (FOC) of PMSM, Digital Power Supply Conversion, Automotive Sensorless Motor Drives, Industrial CAN-Connected Motion Control, Robotics Joint Actuator Control.
Three-Phase BLDC Motor Control
The DSPIC33FJ64MC802T-I/SO is well suited to three-phase brushless DC motor control because its dedicated motor-control PWM module generates up to six complementary outputs with programmable dead-time insertion, while the 40 MIPS core executes commutation and current-loop math in real time. The 10-bit ADC samples phase currents synchronously with the PWM carrier, enabling accurate closed-loop torque control. In a typical implementation, the DSC drives a three-phase inverter gate driver, with the ADC triggered by the PWM period to sample shunt or inline current sensors. Unlike a general-purpose MCU, the single-cycle MAC and barrel shifter allow the Clarke and Park transforms to complete within one PWM period at switching frequencies up to 20 kHz, preserving loop bandwidth. The 28-pin SOIC package keeps the board compact for space-constrained motor drives.
Recommended
Field-Oriented Control (FOC) of PMSM
For permanent-magnet synchronous motor (PMSM) field-oriented control, the DSPIC33FJ64MC802T-I/SO provides the arithmetic headroom needed for the Park and inverse-Park transforms, PI current regulators, and space-vector PWM generation. Its 40 MIPS core and hardware divider keep the FOC loop deterministic, while 16 KB SRAM holds the transformation tables and observer state variables. The device's 8-channel DMA offloads ADC result transfers, freeing the CPU for control math. In practice, the DSC is paired with a three-phase gate driver and an incremental or resolver interface; the on-chip CAN module then reports speed and torque to a host controller. The 3.0-3.6 V supply and -40 C to +85 C rating suit industrial servo drives, and the 28-pin SOIC footprint minimizes PCB area in compact servo amplifiers.
Recommended
Digital Power Supply Conversion
The DSPIC33FJ64MC802T-I/SO supports digital power conversion topologies such as synchronous buck, boost, and LLC resonant converters, where the motor-control PWM module is repurposed as a high-resolution switching waveform generator with dead-time control. The 40 MIPS core runs the voltage and current compensation loops, while the 10-bit ADC digitizes feedback signals for closed-loop regulation. Because the PWM and ADC are hardware-synchronized, the control loop latency is deterministic, which is essential for stable digital compensators. In a typical design, the DSC drives a half-bridge gate driver and communicates telemetry over CAN or UART. The 64 KB Flash accommodates the compensation firmware and communication stack, and the 28-pin SOIC package suits compact power modules. Thermal management should account for the DSC's own dissipation at 40 MIPS.
Recommended
Automotive Sensorless Motor Drives
In automotive auxiliary motor drives such as pumps, fans, and actuators, the DSPIC33FJ64MC802T-I/SO provides sensorless rotor position estimation using back-EMF or sliding-mode observers, eliminating the cost and wiring of position sensors. The 40 MIPS core and single-cycle MAC execute the observer and current regulators within each PWM period, while the 10-bit ADC captures phase voltages and currents. The on-chip ECAN module connects the drive to the vehicle network for diagnostics and command input. The industrial temperature rating of -40 C to +85 C covers most passenger-compartment applications; for under-hood use, the extended-temperature DSPIC33FJ64MC802T-E/SO variant rated to +125 C should be selected. The 28-pin SOIC package supports compact, vibration-tolerant PCB layouts.
Recommended
Industrial CAN-Connected Motion Control
The DSPIC33FJ64MC802T-I/SO integrates an ECAN module, making it a natural fit for distributed industrial motion-control nodes that must communicate over CANopen or a proprietary CAN protocol. The DSC handles local motor-control loops at 40 MIPS while the CAN peripheral manages network traffic with minimal CPU intervention, and the 8-channel DMA moves ADC and UART data without stalling the control loop. In a typical multi-axis system, several DSPIC33FJ64MC802T-I/SO nodes share a CAN bus, each driving one motor axis and reporting position and current telemetry to a central PLC. The 64 KB Flash holds the CAN stack plus motion firmware, and the 28-pin SOIC package keeps each node compact. Proper CAN termination and common-mode filtering are essential for reliable bus operation.
Recommended
Robotics Joint Actuator Control
Robotic joint actuators require fast, precise torque and position control, and the DSPIC33FJ64MC802T-I/SO delivers this through its 40 MIPS core, motor-control PWM, and 10-bit ADC. The DSC runs cascaded position, velocity, and current loops, using the single-cycle MAC to compute the control law within each PWM period. The 16 KB SRAM stores trajectory buffers and filter state, while the CAN module links the joint controller to the robot's central motion planner. In a typical design, the DSC drives a three-phase inverter for a BLDC joint motor and reads an incremental encoder or magnetic angle sensor. The 28-pin SOIC package fits inside compact actuator housings, and the -40 C to +85 C rating supports industrial robot environments. Careful grounding of the current-sense path is critical for torque accuracy.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ64MC802T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ64MC802-I/SO | DSPIC33FJ64MC802T-E/SO | DSPIC33FJ64MC202T-I/SO | DSPIC33FJ64MC802T-I/MM |
|---|---|---|---|---|---|
| Package | 28-pin SOIC (0.295", 7.50 mm) | 28-pin SOIC - same | 28-pin SOIC - same | 28-pin SOIC - same | 28-pin QFN - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| 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 |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C |
| Motor Control PWM | Up to 6 channels with dead-time | Up to 6 channels with dead-time | Up to 6 channels with dead-time | Reduced channel count | Up to 6 channels with dead-time |
| CAN Module | 1x ECAN | 1x ECAN | 1x ECAN | 1x ECAN | 1x ECAN |
| Packaging | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel |
Key Differentiators
- Tape-and-reel packaging for automated assembly (vs DSPIC33FJ64MC802-I/SO)
- Extended temperature option in the same footprint (vs DSPIC33FJ64MC802T-E/SO)
- Full motor-control peripheral set in a 28-pin package (vs DSPIC33FJ64MC202T-I/SO)
- Pin compatibility with PIC24HJ family (vs PIC24HJ series)
Design Notes
Decouple VDD (pins 11 and 28) with a 0.1 uF ceramic capacitor placed within 5 mm of each pin, plus a 10 uF bulk capacitor on the board rail. The analog supply AVDD (pin 26) must be filtered separately from the digital rail using a ferrite bead or RC network and decoupled with 0.1 uF to AVSS (pin 27). Keeping AVDD clean directly improves the 10-bit ADC effective resolution used for motor current sensing.
Route the motor-control PWM outputs (PWM1H/L through PWM3H/L, pins 14-19) as short, matched traces to the gate driver, and keep them physically separated from the ADC input traces (AN0-AN5, pins 2-7). Crosstalk from the high dv/dt PWM nodes into the analog inputs is the most common cause of noisy current feedback in dsPIC33F motor drives. Use a solid ground plane under the device and return analog grounds to AVSS at a single point.
Do not exceed 3.6 V on VDD; the dsPIC33FJ64MC802T-I/SO is not 5 V tolerant on its supply rail. Ensure MCLR (pin 1) has a 10 kOhm pull-up to VDD and a 0.1 uF capacitor to VSS for reliable reset. When migrating from a PIC24HJ or dsPIC30F design, verify that the peripheral pin mapping (PPS) matches, since pin functions are remappable and a mismatch will silently break the application.
Estimated: at 40 MIPS and 3.3 V, the DSPIC33FJ64MC802T-I/SO core current is typically in the tens of milliamps, so self-heating in the 28-pin SOIC is modest. However, the surrounding gate-driver and power stage dominate board temperature. Keep the DSC at least 10 mm from switching power components and provide thermal relief on the ground plane to avoid coupling heat into the analog section.
Compliance Information
ROHS3 compliant per distributor listing (ics-embedded.com). The industrial I/SO variant is not AEC-Q100 qualified; the E/SO extended-temperature variant is available for harsher environments but automotive qualification should be confirmed with Microchip.
