DSPIC33FJ32MC104T-I/PT - 16-bit Motor Control DSC 32KB | Microchip
MPN: DSPIC33FJ32MC104T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.12 | $5.12 |
| 10 | $4.61 | $46.10 |
| 100 | $4.1 | $410.00 |
| 500 | $3.68 | $1,840.00 |
| 1,000 | $3.26 | $3,260.00 |
DSPIC33FJ32MC104T-I/PT Overview
A digital signal controller combines the computational power of a digital signal processor (DSP) with the peripheral integration and ease of use of a microcontroller (MCU). Within the power-management hierarchy, DSCs sit between general-purpose MCUs and dedicated motor-control ASICs, offering a single-chip solution for field-oriented control (FOC), sensorless trapezoidal control, and power-conversion algorithms. The dsPIC33FJ family is Microchip's 16-bit DSC platform optimized for embedded motor control and digital power applications.
Key differentiating features of the DSPIC33FJ32MC104 include dedicated Motor Control PWM (MCPWM) outputs for three-phase inverter drive, a Charge Time Measurement Unit (CTMU) for capacitive touch and precise time measurement, three analog comparators, and a Real-Time Clock and Calendar (RTCC). The Peripheral Pin Select (PPS) feature allows digital peripherals to be remapped to a wide range of I/O pins, dramatically improving board-layout flexibility in low-pin-count designs.
Architecturally, the device pairs a 16-bit dsPIC33F core with extensive DSP engine functionality, including dual 40-bit accumulators, single-cycle MAC, and DSP multiply/divide support. A 14-channel 10-bit ADC enables simultaneous current and voltage sampling for closed-loop motor control, while brown-out detect/reset, power-on reset, and a watchdog timer increase system robustness. The device operates from a 3.0V to 3.6V supply across the industrial -40C to +85C temperature range (I suffix).
Typical applications include three-phase BLDC and PMSM motor drives, AC induction motor control, power inverters, digital power supplies, electric tool control boards, and embedded capacitive-touch user interfaces in appliances.
When designing with this controller, budget flash carefully: 32KB accommodates sensored FOC with headroom for communication stacks, but sensorless FOC with observer algorithms may require the 64KB DSPIC33FJ32MC204 variant in the same 44-pin TQFP footprint.
This page synthesizes distributor listings, drop-in alternatives, and practical motor-control design notes beyond the raw manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ32MC104T-I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32MC204-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32MC104T-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32MC304
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32MC104T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F RISC DSC |
| Program Memory (Flash) | 32 KB |
| RAM | 2 KB |
| Instruction Rate | 16 MIPS |
| Supply Voltage | 3.0 V to 3.6 V |
| ADC Resolution | 10-bit |
| ADC Channels | 14 channels |
| Motor Control PWM | MCPWM (dedicated motor control PWM peripheral) |
| Comparators | 3 |
| Charge Time Measurement Unit | CTMU |
| Real-Time Clock | RTCC |
| Peripheral Pin Select | PPS (remappable I/O) |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 44-pin TQFP (PT) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Data Sheet Family | dsPIC33FJ16MC101/102 and dsPIC33FJ32MC101/102/104 (DS70000652F) |
| RoHS Status | Compliant |
| Watchdog Timer | Yes (WDT) |
| Brown-out Reset | Yes (BOR/POR) |
DSPIC33FJ32MC104T-I/PT 44-pin tqfp (pt) Pin Configuration Guide
Pin configuration for DSPIC33FJ32MC104T-I/PT (44-pin tqfp (pt) 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 DSPIC33FJ32MC104T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ32MC104T-I/PT is suitable for 6 applications: Three-Phase BLDC/PMSM Motor Drives, AC Induction Motor Control, Digital Power Supplies and Inverters, Capacitive Touch Interfaces, Electric Power Tools and E-bike Controllers, Industrial Fans, Pumps and HVAC Blowers.
Three-Phase BLDC/PMSM Motor Drives
The DSPIC33FJ32MC104T-I/PT is purpose-built for three-phase brushless DC and permanent-magnet synchronous motor control. Its dedicated Motor Control PWM (MCPWM) peripheral generates complementary outputs with hardware dead-time insertion for the inverter bridge, while the 14-channel 10-bit ADC samples phase currents and DC bus voltage synchronously with the PWM cycle. The three on-chip analog comparators provide cycle-by-cycle overcurrent protection without CPU intervention, and the 16-bit DSP engine with single-cycle MAC executes field-oriented control (FOC) algorithms at 16 MIPS. The CTMU and PPS further allow sensorless back-EMF schemes and flexible pin allocation in compact drive boards.
Recommended
AC Induction Motor Control
For appliance and industrial AC induction motors, the DSPIC33FJ32MC104T-I/PT implements V/f scalar control or sensorless vector control using its MCPWM peripheral and DSP math engine. The 2KB RAM holds the control state machine, PI compensators, and sine lookup tables for 32KB-flash code images, and the 10-bit ADC reads DC bus ripple and motor current for slip compensation. The RTCC peripheral supports scheduled operation in white-goods applications, while brown-out reset and the watchdog timer guarantee safe shutdown of the power stage during supply faults - a key requirement for mains-connected motor drives in washing machines, fans, and pumps.
Recommended
Digital Power Supplies and Inverters
Switching power converters such as solar micro-inverters, LLC resonant supplies, and PFC stages benefit from the DSPIC33FJ32MC104T-I/PT's deterministic 16 MIPS execution and remappable PWM outputs. The Peripheral Pin Select (PPS) lets designers route PWM, input capture, and comparator outputs to optimal board locations, reducing loop-area and EMI in dense power layouts. The 10-bit ADC with simultaneous sampling supports voltage-mode and current-mode control loops, and the comparators implement fast hiccup-mode protection. The CTMU can also measure precise time intervals for resonant-tank frequency tracking in LLC designs.
Recommended
Capacitive Touch Interfaces
The integrated Charge Time Measurement Unit (CTMU) turns the DSPIC33FJ32MC104T-I/PT into a single-chip capacitive touch controller for appliance panels and motor-drive user interfaces. The CTMU measures charge time on touch pads with sub-picofarad resolution, and PPS allows up to 14 remappable analog-capable pins to serve as touch channels while the same device simultaneously runs the motor-control PWM - eliminating a separate touch MCU in low-pin-count products. Typical designs combine 4 to 12 keys plus a slider, with the 32KB flash holding the touch scanning library, debouncing, and the main control application together.
Recommended
Electric Power Tools and E-bike Controllers
Handheld power tools and light electric-vehicle controllers demand compact, robust motor control with strict BOM cost. The DSPIC33FJ32MC104T-I/PT's 44-pin TQFP offers enough I/O for a three-phase gate driver interface, hall or back-EMF sensing, throttle ADC input, and fault diagnostics, while the industrial -40C to +85C rating covers typical tool thermal environments. Hardware dead-time and comparator-based overcurrent protection respond faster than software loops, protecting MOSFETs during stall events. The 3.0V to 3.6V supply and low peripheral count keep the total controller BOM to a single DSC, driver IC, and power stage.
Recommended
Industrial Fans, Pumps and HVAC Blowers
Continuous-duty fans, circulation pumps, and HVAC blowers use the DSPIC33FJ32MC104T-I/PT for sensorless trapezoidal or FOC control with speed profiling. The RTCC enables scheduled operation and runtime logging for building-management reporting, and the watchdog timer with independent clock source guarantees restart after firmware anomalies in unattended equipment. The 14-channel ADC reads multiple motor currents, NTC temperature sensors, and potentiometer speed commands without external multiplexers. With 32KB flash, the control firmware plus a Modbus-over-UART stack (using PPS-remapped pins) fits comfortably in a single device.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32MC104T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32MC204-I/PT | DSPIC33FJ32MC104T-E/PT | DSPIC33FJ32MC304 |
|---|---|---|---|---|
| Package | 44-pin TQFP (PT) | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 64 KB | 32 KB | 32 KB |
| Performance | 16 MIPS | 16 MIPS | 16 MIPS | 16 MIPS |
| CAN Module | No | No | No | Yes (ECAN) |
| Motor Control PWM (MCPWM) | Yes | Yes | Yes | Yes |
| CTMU / RTCC / PPS | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes |
Key Differentiators
- Integrated CTMU capacitive-touch measurement (vs DSPIC33FJ32MC204-I/PT)
- Extended-temperature AEC-Q100 variant available in the same footprint (vs DSPIC33FJ32MC104T-E/PT)
- ECAN-free baseline cost (vs DSPIC33FJ32MC304)
Design Notes
Decouple each VDD pin with a 0.1uF ceramic capacitor placed within 2 mm of the pin, plus a single 4.7uF to 10uF bulk capacitor near the device. The dsPIC33FJ core draws supply current proportional to clock frequency; at 16 MIPS keep the 3.3V rail within the 3.0V to 3.6V range or the internal regulator and BOR thresholds may trip. Separate the noisy motor-power ground from the controller analog ground and join at a single star point to protect the 10-bit ADC accuracy.
Use PPS (Peripheral Pin Select) to route PWM outputs onto pins closest to the gate-driver IC, minimizing loop area on the switching edge traces. Keep hall-sensor or current-shunt ADC traces away from MCPWM and gate-drive signals, and guard them with ground. Per the family datasheet note (DS70000652F), the exposed metal pad on the TQFP bottom is not connected internally but should be soldered and tied to VSS for mechanical and thermal reliability.
Flash budget is the most common trap: 32KB holds sensored trapezoidal control comfortably, but sensorless FOC with observers plus a communication stack can overflow - plan a migration path to the pin-compatible 64KB MC204 before layout freeze. Also verify configuration bits: oscillator PLL settings determine the actual MIPS, and wrong FRC/PLL fuses are a frequent bring-up failure. Enable BOR and WDT in production configuration words.
Compliance Information
RoHS compliant per distributor listings (Mouser/Octopart). The standard -I grade is not AEC-Q100 qualified; the DSPIC33FJ32MC104T-E/PT extended variant is listed as AEC-Q100 qualified (Microchip USA). Formal REACH and conflict-minerals declarations not found in provided data.
