DSPIC33FJ128MC506T-I/PT - 16-bit DSC 40 MIPS 128KB Flash | Microchip
MPN: DSPIC33FJ128MC506T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
DSPIC33FJ128MC506T-I/PT Overview
A digital signal controller blends the features of a microcontroller unit (MCU) and a digital signal processor (DSP) into a single-chip solution, letting embedded engineers add DSP features to their applications without a second processor. Within the power management hierarchy, the dsPIC33F family sits above basic microcontrollers and below standalone DSPs, targeting real-time control loops.
Key features include the 16-bit pipelined CPU executing up to 40 million instructions per second, dual 16-bit 10-bit/12-bit selectable ADCs, motor-control PWM peripherals with dead-time generation, quadrature encoder interface (QEI), DMA controller, and watchdog/undervoltage/POR reset circuits. Connectivity spans CANbus, I2C, SPI, UART/USART, LINbus and IrDA, so the part can serve as both a control engine and a communications node on industrial buses.
Architecturally, the dsPIC33F uses a modified Harvard 16-bit core with DSP multiply-accumulate (MAC) instructions and 40-bit accumulators, enabling true single-cycle DSP operations for filtering and control algorithms. Operating supply is 3V to 3.6V (3.3V nominal) and the -I temperature grade covers -40C to +85C.
Typical applications include brushless DC motor drives, single and 3-phase induction motor control, switched reluctance motor systems, industrial automation nodes on CAN, and digital power supplies. The motor-control PWM plus QEI combination makes it especially well-suited to closed-loop motion systems.
For design, remember this is a 3.3V device: level-shift or choose appropriate transceivers when interfacing with 5V buses. Note that the 'T' suffix indicates tape-and-reel packaging of the standard 128MC506 die, not an electrical difference.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ128MC506T-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 DSPIC33FJ128MC506T-I/PT (same form factor and footprint) — differing in Package, Core Architecture, Operating Temperature, ADC, ADC Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128MC506A-I/PT
✅ Drop-In✓ In Stock
$3.2 / Unit
View Datasheet →DSPIC33FJ128MC506-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ64MC506-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ256MC510-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.55 / Unit
View Datasheet →DSPIC33FJ128GP706-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ128GP706A-E/PT
✅ Drop-In✓ In Stock
$5.9 / Unit
View Datasheet →DSPIC33FJ128MC506T-I/PT Maximum Ratings & Electrical Characteristics
| Core Processor | dsPIC33F, 16-bit |
| Core Size | 16-bit |
| Speed | 40 MIPS |
| Program Memory | 128KB (128K x 8) FLASH |
| RAM Size | 8KB |
| Supply Voltage | 3 V to 3.6 V |
| Number of I/O | 53 |
| I/O Ports | 21 |
| Connectivity | CANbus, I2C, IrDA, LINbus, SPI, UART/USART |
| ADC Resolution | 10-bit or 12-bit selectable |
| Peripherals | DMA, Motor Control PWM, PWM, QEI, POR, Undervoltage detection/reset, WDT |
| Program Memory Type | Flash |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 64-TQFP (10 x 10 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Lifecycle Status | Active |
DSPIC33FJ128MC506T-I/PT 64-tqfp (10 x 10 mm) Pin Configuration Guide
Pin configuration for DSPIC33FJ128MC506T-I/PT (64-tqfp (10 x 10 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 DSPIC33FJ128MC506T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ128MC506T-I/PT is suitable for 6 applications: Brushless DC (BLDC) Motor Control, Industrial Automation CAN Nodes, Digital Power Supplies, Robotics and Motion Systems, Medical and Lab Instrumentation Control, Automotive-adjacent and Pump Control Systems.
Brushless DC (BLDC) Motor Control
The dsPIC33FJ128MC506T-I/PT is purpose-built for BLDC drives: its motor-control PWM peripheral generates complementary outputs with hardware dead-time insertion, while the quadrature encoder interface reads position feedback for closed-loop commutation. The 40 MIPS 16-bit core executes DSP multiply-accumulate instructions, so field-oriented control and PID loops run with ample headroom in a single chip. In a typical drive, the DSC reads a 10/12-bit ADC current and voltage sample, computes the control algorithm, and updates the PWM duty cycle - a cycle that completes well within PWM periods at typical motor frequencies. Unlike a generic MCU plus separate DSP, this integration removes inter-processor latency and board complexity. Design consideration: dedicate the DMA controller to ADC results so current-sampling is jitter-free.
Recommended
Industrial Automation CAN Nodes
With an integrated CANbus interface alongside I2C, SPI, UART/USART, LINbus and IrDA, the dsPIC33FJ128MC506T-I/PT serves as both a real-time controller and a communications endpoint on factory networks. The 40 MIPS core handles protocol handling plus local control tasks concurrently, while 128KB FLASH leaves room for OTA-style field updates of application logic. Typical nodes include conveyor position controllers, sensor aggregation points and motor-drive slave stations that report status over CAN while executing local motion or process loops. The 3V to 3.6V supply simplifies integration with modern 3.3V sensor ecosystems, and the 53 I/O pins interface switches, indicators and encoders directly. Pair the CAN module with an external transceiver and ensure proper bus termination at 120 ohms at both network ends.
Recommended
Digital Power Supplies
The dsPIC33FJ128MC506T-I/PT's combination of fast 10/12-bit ADCs, DMA-triggered sampling and motor-control-class PWM makes it effective as a digital power supply controller for LLC, buck and PFC stages. The 40 MIPS core closes voltage and current loops with DSP-grade arithmetic, and the PWM peripherals offer phase-shifted topologies with per-cycle fault shutdown, essential for protecting power stages during transients. Placing the ADC in 10-bit mode maximizes sampling throughput for current loops, while 12-bit mode suits precision voltage regulation references. Because the entire control loop lives in one 16-bit DSC, firmware-defined protections (overcurrent, overvoltage, brown-out via the on-chip undervoltage detector) are deterministic. Design consideration: trigger ADC conversions synchronously to the PWM period using the PWM-trigger or DMA chaining to avoid switching-noise corruption.
Recommended
Robotics and Motion Systems
Robot joints and mobile-platform drive systems benefit from the QEI plus motor-control PWM pairing in the dsPIC33FJ128MC506T-I/PT: the quadrature encoder interface counts position and velocity in hardware, freeing the 40 MIPS core for trajectory planning and multi-axis coordination. DSP MAC instructions accelerate the Kalman filters and observer math common in modern motion control. With 128KB FLASH, kinematics code and field-update bootloaders coexist comfortably, and the 8KB RAM supports buffered trajectory segments. Multi-axis robots typically distribute one DSC per joint or axis, networking the controllers over CAN, which the part integrates natively. The 53 GPIO lines interface limit switches, Hall sensors and safety interlocks directly. Remember the 3.0-3.6V operating window when connecting to 5V encoder outputs - level shifting is required.
Recommended
Medical and Lab Instrumentation Control
Benchtop medical and laboratory instruments - pumps, sample handlers and diagnostic rigs - use the dsPIC33FJ128MC506T-I/PT to combine precise stepper or BLDC actuation with quiet sensor acquisition. The 10/12-bit ADC resolves sensor signals across 16 channels via DMA, while the 40 MIPS core runs control loops and a serial command interface over UART/USART toward the instrument's main processor or PC host. The -40C to +85C industrial grade tolerates demanding thermal environments inside enclosures with integrated power stages. I2C and SPI connectivity attach pressure, flow and temperature sensors from the same 3.3V domain, and LINbus/IrDA options support legacy instrument buses. Because actuation is PWM-based with hardware dead-time, motion is smooth and EMI-manageable with standard layout practice, simplifying compliance work in sensitive measurement systems.
Recommended
Automotive-adjacent and Pump Control Systems
Pump controllers, coolant circulation systems and hydraulic power units use the dsPIC33FJ128MC506T-I/PT for sensor-driven flow control with motor PWM actuation. The integrated LINbus and CANbus interfaces connect to vehicle-style or industrial body networks, while the on-chip undervoltage detection, POR and watchdog timer provide the reset robustness required for unattended 24/7 equipment. The 40 MIPS core implements pump-curve optimization, dry-run protection and soft-start ramping entirely in firmware, and the QEI supports encoder feedback on variable-speed pumps. With 128KB FLASH, multiple pump profiles and a field-update bootloader fit comfortably. Design consideration: the -I grade is rated -40C to +85C; for under-hood installations verify the ambient at the device location and consider the extended-temperature family members instead.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ128MC506T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128MC506A-I/PT | DSPIC33FJ128MC506-I/PT | DSPIC33FJ64MC506-I/PT | DSPIC33FJ256MC510-I/PT | DSPIC33FJ128GP706A-E/PT |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 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 Memory (FLASH) | 128KB | 128KB | 128KB | 64KB | 256KB | 128KB |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) |
| Motor-Control Peripherals | MC PWM, QEI, DMA | MC PWM, QEI, DMA | MC PWM, QEI, DMA | MC PWM, QEI, DMA | MC PWM, QEI, DMA | General-purpose peripheral set |
Key Differentiators
- Motor-control specialization on the MC die (vs DSPIC33FJ128GP706A-E/PT)
- Revised silicon available in same footprint (vs DSPIC33FJ128MC506-I/PT)
- Memory headroom trade-off (vs DSPIC33FJ64MC506-I/PT)
- Single-chip DSP + MCU integration (vs Generic 16-bit MCUs)
Design Notes
The device operates from a 3.0V to 3.6V rail, nominally 3.3V. Decouple each VDD pin with 0.1uF ceramic capacitors placed within 2 mm of the pin, plus bulk 10uF capacitance near the package. When interfacing with 5V logic or legacy buses, use level shifters or 3.3V-compatible transceivers - the dsPIC33F I/O is not 5V tolerant. The on-chip undervoltage detector and POR handle supply sequencing, but verify brown-out thresholds match your supply's droop behavior under motor start-up current surges.
The 64-TQFP has 0.5 mm lead pitch - use a standard TQFP-64 land pattern with solder-mask-defined pads for reliable reflow. Route the oscillator traces (OSC1/OSC2) short and away from PWM switching edges. For motor-control designs, keep the ADC analog inputs away from PWM gate-driver return currents and use the DMA-triggered, PWM-synchronized sampling mode so current measurements occur during low-noise windows of the switching period.
The 'T' suffix means tape-and-reel, not a different die - do not expect electrical differences from the tray-packaged DSPIC33FJ128MC506-I/PT. When replacing the original die with the 'A' revision (128MC506A), recompile firmware and review the device errata: Microchip released the A-variant specifically to correct silicon issues. Also confirm the correct configuration bits for the CAN module clock source before first CAN bus bring-up, a frequent source of bus-off faults.
Compliance Information
Compliance data not explicitly stated in the retrieved web data. Microchip standard products of this era are typically RoHS-compliant; confirm against the official Microchip environmental page before relying on it.
