DSPIC33EP256MC506T-I/MR - 70 MIPS 16-bit DSC, 256KB Flash | Microchip
MPN: DSPIC33EP256MC506T-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.9 | $6.90 |
| 10 | $6.25 | $62.50 |
| 100 | $5.55 | $555.00 |
| 500 | $5.1 | $2,550.00 |
| 1,000 | $4.65 | $4,650.00 |
DSPIC33EP256MC506T-I/MR Overview
A digital signal controller combines the computational throughput of a digital signal processor with the peripheral integration and control flexibility of a microcontroller. Within the semiconductor hierarchy, the dsPIC33EP family sits under 16-bit microcontrollers and DSCs, embedded processors designed specifically for real-time closed-loop control where both math-intensive DSP operations and fast interrupt-driven I/O are required simultaneously.
Key features include a modified Harvard dsPIC DSC core with DSP engine (single-cycle MAC, 40-bit accumulators), motor control PWM (MCPWM) peripherals, quadrature encoder interface (QEI) inputs, three internal op-amps and comparators for current-sense front ends, a Peripheral Trigger Generator (PTG), an integrated CAN module, and Peripheral Pin Select (PPS) for flexible I/O remapping per the Microchip family datasheet DS70000657J.
Architecturally, the dsPIC33EP core executes most instructions in a single cycle at 70 MIPS, with hardware DSP support for fractional and integer math, making it well suited to field-oriented control (FOC) algorithms that must complete within a single PWM period. The internal analog op-amps can be configured as current-sense amplifiers feeding the ADC, reducing external BOM cost in inverter designs.
Typical applications include brushless DC and PMSM motor drives, digital power supplies and inverters, industrial automation, and embedded control systems requiring CAN connectivity.
A key design consideration: the 64-VQFN exposed pad must be soldered to a grounded thermal land pattern for reliable operation at high MIPS clock rates; verify supply sequencing and use adequate decoupling on all VDD/VDDCORE pins.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP256MC506T-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 DSPIC33EP256MC506T-I/MR (same form factor and footprint) — differing in Package, Packaging, Program Memory (Flash), Temperature Grade, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256MC506-I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP256MC506-E/MR
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP256MC506T-E/MR
✅ Drop-In✓ In Stock
$5.08 / Unit
View Datasheet →DSPIC33EP256GM306T-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
Contact for price
View Datasheet →DSPIC33CH64MP506T-I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP256MC506T-I/MR Maximum Ratings & Electrical Characteristics
| Core | dsPIC33E 16-bit DSC core |
| Max CPU Speed | 70 MIPS (60 MHz per RS listing) |
| Program Memory (Flash) | 256KB (85.5K x 24) |
| RAM | 32KB |
| Supply Voltage | 3.3 V |
| Package | 64-VQFN (9x9 mm), exposed pad |
| Mounting Type | Surface Mount |
| Number of Pins | 64 |
| Motor Control PWM (MCPWM) | Yes |
| Quadrature Encoder Interface (QEI) | Yes |
| Internal Op-Amps | 3 |
| Comparators | Yes |
| CAN | Yes |
| Peripheral Trigger Generator (PTG) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Temperature Grade | I (Industrial), -40C to +85C |
| Packaging | Tape & Reel (T suffix) |
DSPIC33EP256MC506T-I/MR 64-vqfn (9x9 mm), exposed pad Pin Configuration Guide
Pin configuration for DSPIC33EP256MC506T-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 DSPIC33EP256MC506T-I/MR.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP256MC506T-I/MR is suitable for 6 applications: Brushless DC / PMSM Motor Control, Digital Power Supplies and Inverters, Industrial Automation and CAN Networking Nodes, Robotics and Servo Drives, Battery Management and Embedded Monitoring, Sensor Signal Acquisition and Smart Instruments.
Brushless DC / PMSM Motor Control
The DSPIC33EP256MC506T-I/MR is purpose-built for precision motor control: its 70 MIPS DSP core with single-cycle MAC executes field-oriented control (FOC) math within a single PWM period, while the MCPWM peripheral generates complementary outputs with programmable dead time and the QEI decodes incremental encoder feedback. The three internal op-amps condition low-side shunt currents directly into the ADC, eliminating external amplifier ICs and shrinking the inverter BOM. Microchip validates this exact device on the MCLV-2 and MCHV-2 development boards through the MA330031 internal-op-amp PIM, so reference code and hardware schematics are readily available. Place the controller close to the gate drivers, keep the analog ground for shunt signals separate from the power ground, and budget the PWM ISR to complete well within the switching period for stable current-loop bandwidth.
Recommended
Digital Power Supplies and Inverters
In digitally controlled AC-DC, DC-DC, and solar inverter stages, the DSPIC33EP256MC506T-I/MR closes fast voltage and current loops in firmware. The 70 MIPS core supports average-current-mode and predictive control at switching frequencies in the hundreds of kilohertz, the high-resolution MCPWM outputs drive half-bridge and full-bridge topologies with cycle-by-cycle current limiting via the dedicated analog comparator, and the PTG (Peripheral Trigger Generator) sequences ADC sampling synchronized to the PWM carrier without CPU intervention. This device suits LLC, totem-pole PFC, and grid-tie inverter designs where CAN connectivity supports system-level telemetry. A quantified benefit: removing an external PWM controller and analog error amplifiers cuts BOM count while enabling firmware-tunable loop gains; the trade-off is that firmware bugs now affect safety, so fault-handling paths (comparator trip zones) should be kept in hardware rather than software.
Recommended
Industrial Automation and CAN Networking Nodes
The integrated CAN module makes the DSPIC33EP256MC506T-I/MR a strong fit for industrial nodes such as servo drivers, I/O concentrators, and machine subcontrollers on a CANopen or DeviceNet-style bus. The 70 MIPS headroom simultaneously runs the control loop and the protocol stack, 256KB Flash holds field-updatable application plus bootloader, and Peripheral Pin Select lets designers route UART, SPI, and CAN signals to optimal board locations, simplifying PCB routing in dense cabinets. The 32KB RAM accommodates message queues and diagnostic buffers. The industrial -40C to +85C grade covers typical factory environments; for enclosure installations near drives and heat sources, the pin-identical -E/MR variant adds margin to +125C. Practical consideration: implement a CAN bootloader early in the project so field updates do not require physical access to the controller.
Recommended
Robotics and Servo Drives
Multi-axis robotic joints demand simultaneous motor commutation, trajectory execution, and communication - a workload the DSPIC33EP256MC506T-I/MR handles with its DSP-accelerated 70 MIPS core and rich peripheral set. QEI inputs track incremental encoders on each axis, MCPWM drives the power stage with hardware dead time, internal op-amps and comparators implement fast overcurrent protection independent of the CPU, and CAN links the joint controller to the main robot computer. The DSP engine's fractional math accelerates the trigonometric operations in FOC and inverse-kinematics compensation. Because three axes of computation rarely fit in one device, a typical architecture assigns one DSC per joint; the 256KB Flash stores per-axis calibration and firmware variants. Engineers should verify ISR worst-case timing with MPLAB simulation before committing to a PWM frequency, since control-loop jitter directly translates into audible torque ripple.
Recommended
Battery Management and Embedded Monitoring
The DSPIC33EP256MC506T-I/MR serves as a supervisory controller in battery systems: its 12-bit ADC with simultaneous sampling reads cell-voltage multiplexers and current shunts, internal comparators flag overvoltage/undervoltage conditions in hardware, and the CAN module reports state-of-charge telemetry to vehicle or inverter controllers. The 3.3V single-supply operation and Peripheral Pin Select simplify integration with isolated communication front ends. With 70 MIPS available, the device can run coulomb-counting and impedance-estimation firmware alongside protection routines. The industrial temperature grade suits -40C to +85C outdoor installations; battery enclosures that experience solar loading should specify the E-grade drop-in variant instead. Design consideration: keep the analog front-end ground star-connected to the controller's AVSS, and trigger ADC conversion from the PTG or PWM for deterministic sampling instants, since irregular sampling degrades current-integration accuracy in coulomb counting.
Recommended
Sensor Signal Acquisition and Smart Instruments
With three internal op-amps, multiple ADC channels, and a 70 MIPS DSP core, the DSPIC33EP256MC506T-I/MR can implement a complete signal chain in one chip: the op-amps amplify bridge or shunt sensor outputs, the ADC digitizes them, and the DSP engine applies digital filtering (IIR/FIR) and FFT analysis for condition-monitoring instruments such as vibration analyzers, load cells, and flow meters. The 256KB Flash stores calibration tables and a local display/HMI firmware, while SPI/UART via Peripheral Pin Select interfaces to displays, memory, and host links. Using the internal amplifiers reduces component count and calibration drift sources versus discrete front ends. The trade-off is analog performance: internal op-amps have limited bandwidth and offset specifications compared with precision external amplifiers, so verify their gain-bandwidth and offset against your accuracy budget in the family datasheet before eliminating external signal-conditioning stages.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP256MC506T-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256MC506-I/MR | DSPIC33EP256MC506-E/MR | DSPIC33EP256GM306T-I/MR | DSPIC33CH64MP506T-I/MR |
|---|---|---|---|---|---|
| Package | 64-VQFN (9x9 mm), exposed pad | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same | 64-VQFN (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Performance | 70 MIPS, 16-bit dsPIC33EP core | 70 MIPS | 70 MIPS | 70 MIPS | Dual-core, 100 MIPS master + 100 MIPS slave class |
| Key Peripherals | MCPWM, QEI, 3x op-amps, comparators, PTG, CAN, PPS | Identical (same die) | Identical (same die) | GM series analog/dual CAN set | CH series: master/slave cores, different peripheral set |
| Packaging | Tape & Reel (T suffix) | Tray | Tray | Tape & Reel | Tape & Reel |
Key Differentiators
- Three integrated op-amps for current sensing (vs DSPIC33EP256GM306T-I/MR)
- Extended temperature drop-in available without redesign (vs DSPIC33EP256MC506-E/MR)
- Deep motor-control ecosystem (vs DSPIC33CH64MP506T-I/MR)
- Trade-off: single CAN only (vs DSPIC33EP256GM306T-I/MR)
Design Notes
The 64-VQFN (9x9) MR package has a large exposed thermal pad on the underside that must be connected to the ground plane through a solder-mask-defined land pattern with an array of thermal vias. This pad is not merely thermal - multiple ground returns for the internal regulator and analog peripherals depend on it. Follow the Microchip family datasheet (DS70000657J) PCB layout guidelines: define the pad in the PCB as slightly smaller than the IC pad to prevent solder bridging, and verify X-ray inspection of the reflowed assembly for volume production.
The dsPIC33EP integrates an on-chip regulator that produces the core voltage from the single 3.3V VDD supply. Place the VDDCORE capacitor close to the device using short, wide traces - excessive series inductance here is a documented cause of brown-out resets at high MIPS operation. Decouple every VDD pin pair with 0.1uF ceramics and add bulk capacitance near the supply entry. Estimated: at 70 MIPS with typical peripheral loading, dynamic core current scales with Fcy, so confirm the supply can deliver the worst-case IDD from the datasheet electrical characteristics table plus peripheral budgets.
For motor-control applications, route the current-shunt signals to the internal op-amp inputs as short Kelvin connections directly from the shunt resistors, and keep them away from PWM output traces that switch high dv/dt. Trigger ADC sampling from the PWM peripheral (via PTG or PWM-trigger) at the center of the low-side conduction interval to reject switching noise - this synchronization is the single biggest determiner of current-loop signal quality in FOC designs using the MA330031/MCLV-2 reference topology.
Peripheral Pin Select (PPS) is powerful but error-prone: a peripheral input can be mapped to multiple pins, but an output can only drive one RPn pin - conflicting mappings are silently ignored, producing a non-working UART or CAN pin. Use the MPLAB Code Configurator or Microchip PPS header library to generate mappings, and verify the PPS lock sequence (unlock, write, lock) is implemented exactly as in the family datasheet Section 11.4, since an incorrect unlock key sequence is a frequent bring-up failure.
Compliance Information
RoHS-compliant, lead-free per distributor listings (RS Components). Formal REACH, halogen-free and conflict-minerals declarations available from Microchip Quality/Environmental documentation - not stated in provided data.
