DSPIC33FJ128MC506AT-I/MR - 16-bit DSC 40MIPS 128KB | Microchip
MPN: DSPIC33FJ128MC506AT-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.69 | $5.69 |
| 10 | $5.42 | $54.20 |
| 100 | $5.12 | $512.00 |
| 500 | $4.86 | $2,430.00 |
| 1,000 | $4.61 | $4,610.00 |
DSPIC33FJ128MC506AT-I/MR Overview
A digital signal controller merges the peripheral set and ease of use of a microcontroller with the multiply-accumulate (MAC) DSP engine of a digital signal processor, sitting in the product hierarchy: DSC -> 16-bit MCU/DSP -> microcontroller -> embedded processor. The dsPIC33FJ family executes DSP-class instructions such as MAC and DSP multiply on the same RISC pipeline used for general-purpose C code.
Key features include 40 MIPS maximum performance at 40 MHz, 9 timers, 8 DMA channels, 4 serial I/O ports, and 5 external interrupt sources per distributor listings. The industrial temperature grade (-40C to +85C) and 3V to 3.6V operating supply suit motor-control and industrial power electronics rails.
The dsPIC33FJ128MC506A family is specifically architected for motor control: brushless DC (BLDC) motors, single- and three-phase induction motors, and switched reluctance motors, according to Microchip's official product page. On-chip motor-control PWM, high-speed ADC sampling, and DMA offload the CPU during commutation loops.
Typical applications include sensorless BLDC and PMSM drives, digital power supplies (PFC, LLC), uninterruptible power supplies, and industrial automation nodes that need deterministic DSP math with MCU-style peripherals.
Design consideration: the 64-VQFN exposed pad must be soldered to a ground pour for both thermal dissipation and signal integrity; the 9x9 mm fine-pitch land pattern requires controlled reflow profiles. Verify the A-suffix silicon errata before layout reuse from older dsPIC33FJ128MC506 designs.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with all data verified against live web sources.
Drop-in alternatives for DSPIC33FJ128MC506AT-I/MR — 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 DSPIC33FJ128MC506AT-I/MR (same form factor and footprint) — differing in Package, Serial I/O Ports, Timers, Core, Data RAM.
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Request AlternativesDSPIC33FJ128MC506AT-I/MR Maximum Ratings & Electrical Characteristics
| Core | dsPIC33FJ (16-bit MCU/DSP) |
| Maximum Clock Frequency | 40 MHz |
| Performance | 40 MIPS |
| Program Memory Size | 128KB (128K x 8) Flash |
| Data RAM Size | 8 kB |
| Operating Supply Voltage | 3 V to 3.6 V |
| Timers | 9 |
| DMA Channels | 8 |
| Serial I/O Ports | 4 |
| External Interrupts | 5 |
| Minimum Operating Temperature | -40 C |
| Maximum Operating Temperature | +85 C |
| Package | 64-VQFN (9x9 mm) Exposed Pad |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T/R) |
DSPIC33FJ128MC506AT-I/MR 64-vqfn (9x9 mm) exposed pad Pin Configuration Guide
Pin configuration for DSPIC33FJ128MC506AT-I/MR (64-vqfn (9x9 mm) exposed pad 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 DSPIC33FJ128MC506AT-I/MR.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ128MC506AT-I/MR is suitable for 6 applications: Sensorless BLDC Motor Control, Three-Phase Induction Motor Drives, Digital Power Supplies (PFC / LLC), Uninterruptible Power Supplies (UPS), Industrial Automation Nodes, Switched Reluctance Motor Drives.
Sensorless BLDC Motor Control
The dsPIC33FJ128MC506A family is explicitly architected by Microchip for brushless DC motor drives. The 40 MIPS DSP core executes the back-EMF observer and commutation state machine within a 100 us PWM period, while the motor-control PWM peripheral generates complementary outputs with hardware dead-band. Eight DMA channels move ADC current-sample results to RAM without CPU cycles, so the control loop keeps deterministic timing. In a typical sensorless BLDC design the DSC reads phase voltages and shunt current through its ADC, runs the commutation math in the DSP engine, and updates PWM duty per cycle. Using this DSC eliminates a separate gate-driver MCU and reduces BOM count in fans, pumps, and power tools.
Recommended
Three-Phase Induction Motor Drives
Microchip lists single- and three-phase induction motor support as a primary application for the dsPIC33FJ128MC506A family. Field-oriented control of induction machines requires fast Clarke/Park transforms and PI current loops; the DSP MAC engine on this DSC completes these in a few microseconds at 40 MIPS. The 128KB Flash accommodates sensorless speed-estimation algorithms alongside V/f fallback modes, and the 8 kB RAM buffers current-sampling histories. Multiple PWM channels with dead-band insertion drive a six-switch IGBT/MOSFET inverter through gate drivers. For industrial pumps, conveyors, and HVAC compressors on 3.3V control rails, this part provides a single-chip controller that handles protection, communication, and modulation simultaneously.
Recommended
Digital Power Supplies (PFC / LLC)
The DSPIC33FJ128MC506AT-I/MR suits digitally controlled AC-DC and DC-DC converters. Its high-speed ADC samples output voltage and inductor current each switching cycle, and the DSP pipeline computes compensator updates fast enough for 100-500 kHz PFC and LLC stages. The 8 DMA channels offload telemetry logging so the CPU maintains the control loop, while UART/SPI/I2C peripherals implement PMBus-style host communication on the 4 serial ports. The 3V to 3.6V supply and -40C to +85C industrial rating fit server and telecom power environments. Compared with an analog controller, this DSC adds adaptive compensation, soft-start shaping, and fault logging without changing the power stage.
Recommended
Uninterruptible Power Supplies (UPS)
UPS designs need simultaneous inverter modulation, battery-charge management, and grid-synchronization math - a workload matching this DSC's profile. The 40 MIPS core runs PLL grid-locking and three-phase inverter control concurrently, the 9 timers generate carrier and protection timebases, and 5 external interrupt pins handle fast fault trips from comparator outputs. 128KB Flash retains firmware plus event logs, and the 8 kB RAM holds circulating-current history for condition monitoring. The industrial -40C to +85C range and 3V-3.6V supply integrate cleanly into standard control-card designs, and the 64-pin VQFN exposes enough PWM and ADC channels for line-interactive and double-conversion topologies alike.
Recommended
Industrial Automation Nodes
In factory automation, this DSC bridges sensing, actuation, and communication on one chip. Four serial ports implement RS-485/Modbus (UART), SPI sensor buses, and I2C peripheral expansion concurrently, while the DSP engine performs FFT-based vibration analysis or sensor-fusion math locally at the edge. The 5 external interrupts capture encoder or limit-switch events with deterministic latency, and 8 DMA channels stream ADC data for predictive-maintenance analytics. Operating from -40C to +85C, the part tolerates cabinet and shop-floor environments, and the 64-VQFN exposed pad gives robust grounding for electrically noisy motor cabinets. Flash programming in-system enables field firmware updates on deployed equipment.
Recommended
Switched Reluctance Motor Drives
Microchip's product page names switched reluctance (SR) motors as a supported topology for the dsPIC33FJ128MC506A family. SR drives demand asymmetric half-bridge modulation with precise phase-current chopping and torque-ripple minimization - tasks that use the DSC's independent PWM channels and fast ADC simultaneously. The 40 MIPS DSP core executes nonlinear SR torque-modeling math in real time, while 128KB Flash holds commutation tables across the operating envelope. Eight DMA channels keep the current-sampling loop jitter-free, which directly improves acoustic behavior and efficiency. For traction ancillaries, industrial fans, and appliance motors where SR's rotor robustness matters, this single-chip controller reduces system cost versus discrete DSP-plus-MCU stacks.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128MC506AT-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128MC506A-I/MR | DSPIC33FJ128MC506AT-E/MR | DSPIC33FJ128MC506A-I/PT |
|---|---|---|---|---|
| Package | 64-VQFN (9x9 mm) Exposed Pad | 64-VQFN (9x9) - same | 64-VQFN (9x9) - same | 64-TQFP (10x10) - different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 128KB (128K x 8) | 128KB | 128KB | 128KB |
| Data RAM | 8 kB | 8 kB | 8 kB | 8 kB |
| Maximum Performance | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS | 40 MHz / 40 MIPS |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +125C (Extended) | -40C to +85C |
| Operating Voltage | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V |
| Packaging | Tape & Reel (T) | Tube / Tray | Tape & Reel (T) | Tube / Tray |
Key Differentiators
- Motor-control-dedicated architecture (vs DSPIC33FJ128GP706A-E/PT)
- Extended temperature option on same footprint (vs DSPIC33FJ128MC506AT-E/MR)
- Flash headroom upgrade without respin (vs DSPIC33FJ256MC506A-I/MR)
Design Notes
The 64-VQFN (9x9 mm) exposed pad must be connected to a solid ground plane. Use a thermal via array (e.g., 5x5 grid of 0.3 mm vias on 0.8-1.0 mm pitch) under the pad to the internal ground layer for both heat spreading and return-current integrity. The fine-pitch perimeter lands require a well-controlled reflow profile with solder-paste print inspection, since QFN pad collapse can bridge adjacent pins. Follow Microchip's QFN land-pattern recommendation in the datasheet rather than the nominal package outline drawing when generating footprints.
Operate from a clean 3.3V rail within the 3V to 3.6V window. Decouple each VDD pin pair with 0.1 uF ceramics placed within 2 mm of the pins, plus one bulk 10 uF capacitor near the supply entry. When switching high-current motor loads on the same board, separate the DSC ground return from the power-stage ground and join at a single star point to prevent ground bounce during PWM switching edges. Verify that brown-out configuration is enabled so the DSC holds reset during rail dips from inverter load steps.
The 'A' suffix is a later silicon stepping of the dsPIC33FJ128MC506 family - review the Microchip errata sheet for the specific silicon revision before reusing code or layout from non-A dsPIC33FJ128MC506 designs. The 'T' suffix means Tape and Reel only; ordering the non-T suffix yields tubes/trays, and mismatched packaging expectations are a common procurement error. Also confirm the I temperature grade (-40C to +85C) is sufficient; use the -E variant for ambient conditions above 85C.
Compliance Information
Compliance status was not explicitly stated in the provided web data; verify against Microchip's official product page environmental data before export or production use.
