DSPIC33EP256MC502T-I/SO - 16-bit 70 MIPS DSC, 256KB Flash | Microchip
MPN: DSPIC33EP256MC502T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.2 | $6.20 |
| 10 | $5.58 | $55.80 |
| 100 | $4.95 | $495.00 |
| 500 | $4.46 | $2,230.00 |
| 1,000 | $4.02 | $4,020.00 |
DSPIC33EP256MC502T-I/SO Overview
A digital signal controller combines the computational architecture of a microcontroller with the math acceleration of a DSP. Within the power-management hierarchy, the DSC sits above general-purpose MCUs because it integrates a DSP engine, single-cycle MAC, and high-resolution PWM peripherals purpose-built for real-time control loops. The dsPIC33EP family is Microchip's precision motor-control DSC generation, positioned between entry-level PIC MCUs and application-specific motor drivers.
Key features include the 70 MIPS dsPIC DSC core with integrated DSP instruction set, 256KB of self-programmable Flash, and the findic-listed peripheral set: motor control PWM (MCPWM), quadrature encoder interface (QEI), CAN bus, two operational amplifiers, and three comparators. Communication coverage spans CAN, I2C, IrDA, LINbus, SPI, and UART/USART per Microchip USA product data, enabling gateway and drive-network designs from a single chip.
Technically, the dsPIC33EP core executes an enhanced 16-bit instruction set at up to 70 MIPS, with DSP multiply-accumulate and modulo/bit-reversed addressing that accelerate Clarke/Park transforms and PID loops in field-oriented motor control. The integrated op amps allow current-sense amplification without external devices, and the high-speed PWM supports complementary outputs with dead-time control for BLDC, PMSM, and ACIM drives.
Typical applications include brushless DC and permanent-magnet motor control, industrial automation drives, power supplies and digital power conversion, and automotive-adjacent control nodes using the CAN interface. Microchip explicitly positions the family for high-performance, energy-efficient, quieter precision motor control systems.
A key design consideration is supply decoupling: place low-ESR ceramic capacitors directly across VDD/VSS pairs and provide solid ground returns for the analog op-amp and comparator inputs to preserve ADC accuracy in high PWM-noise environments.
This page synthesizes distributor pricing, drop-in same-package alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP256MC502T-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 DSPIC33EP256MC502T-I/SO (same form factor and footprint) — differing in Package, Core Architecture, ADC Resolution, Communication Interfaces, DMA Channels.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256MC502T-E/SO
✅ Drop-In✓ In Stock
$0.42 / Unit
View Datasheet →DSPIC33EP256MC502-H/SO
✅ Drop-In✓ In Stock
$4.38 / Unit
View Datasheet →DSPIC33EP256MC502-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MU502-E/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.12 / Unit
View Datasheet →DSPIC33EP256MC502T-I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33EP DSC core |
| Maximum CPU Speed | 70 MIPS |
| Program Memory Size | 256KB (85.5K x 24) Flash |
| Data RAM Size | 32KB |
| Package | 28-SOIC (WSOIC-28, wide body) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Motor Control PWM | MCPWM (high-speed PWM with dead-time control) |
| Quadrature Encoder Interface | QEI |
| On-chip Op Amps | 2 |
| On-chip Comparators | 3 |
| CAN Interface | Yes (CANbus) |
| Communication Interfaces | CAN, I2C, IrDA, LINbus, QEI, SPI, UART/USART |
| Packaging | Tape & Reel (T suffix) |
DSPIC33EP256MC502T-I/SO 28-soic (wsoic-28, wide body) Pin Configuration Guide
Pin configuration for DSPIC33EP256MC502T-I/SO (28-soic (wsoic-28, wide body) 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 DSPIC33EP256MC502T-I/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP256MC502T-I/SO is suitable for 6 applications: Brushless DC Motor Control, Digital Power Conversion, Industrial Automation and Motion Nodes, CAN Networked Control Systems, Sensor Signal Conditioning Front Ends, Embedded Control with Field Firmware Updates.
Brushless DC Motor Control
The DSPIC33EP256MC502T-I/SO fits BLDC and PMSM drives because Microchip positions the dsPIC33E family explicitly for precision, energy-efficient, quieter motor control. Its 70 MIPS core with DSP MAC instructions executes field-oriented control loops fast enough for high electrical-frequency motors, while the MCPWM module generates complementary PWM pairs with hardware dead-time insertion for the three-phase inverter. The QEI decodes encoder feedback directly, and the two on-chip op amps amplify shunt currents without external amplifiers. In use, phase currents are sampled by the ADC synchronized to PWM centers, the FOC algorithm runs in the DSP engine, and the PWM outputs gate the power stage - a single-chip solution that reduces BOM cost and loop latency compared with MCU plus external analog signal chain.
Recommended
Digital Power Conversion
The DSPIC33EP256MC502T-I/SO suits digitally controlled power supplies and inverters because its high-speed MCPWM supports the fine duty-cycle resolution and phase-shifted topologies (LLC, buck, boost, totem-pole PFC) required in digital power. The 70 MIPS DSP core closes voltage and current loops at switching frequency, and the three on-chip comparators can implement hardware cycle-by-cycle overcurrent protection with microsecond response, independent of software. Typical usage: the PWM module drives the power-stage MOSFET gate drivers, ADC samples the output rail each cycle, and the control law (PID or nonlinear) runs in the DSP engine. Compared with a general-purpose MCU, the integrated analog (op amps, comparators, ADC) removes external signal-conditioning components, and the CAN/UART interfaces enable PMBus-style supervisory communication.
Recommended
Industrial Automation and Motion Nodes
In factory automation, the DSPIC33EP256MC502T-I/SO serves as an intelligent motion or actuation node. The QEI interface reads incremental encoder position from servo motors, the 256KB Flash holds trajectory-planning and protocol firmware with room for field updates, and the CAN interface connects the node to industrial fieldbus networks while I2C/SPI/UART cover local sensors and HMIs. The wide -40C to +85C industrial temperature range (I suffix) matches cabinet and machinery environments. In deployment, the DSC closes the current/velocity loops locally at 70 MIPS while higher-level coordination flows over CAN, giving deterministic real-time behavior that a general-purpose MCU plus external DSP would achieve only with two chips and added inter-processor latency.
Recommended
CAN Networked Control Systems
The integrated CAN peripheral makes the DSPIC33EP256MC502T-I/SO a strong fit for distributed control networks in vehicles, agricultural equipment, and industrial cells. Per Microchip USA product data, the device includes CANbus alongside I2C, IrDA, LINbus, SPI, and UART/USART, letting one chip bridge a CAN backbone to LIN sub-nodes or serial diagnostics. The 256KB Flash accommodates full CAN stacks, bootloaders, and application logic, and the 70 MIPS core leaves margin for application computation on top of message handling. A typical node reads sensors via the on-chip ADC and op amps, executes local control, and publishes telemetry over CAN at 1 Mbps, with the three comparators providing independent safety-limit detection that continues to protect hardware even if the software faults.
Recommended
Sensor Signal Conditioning Front Ends
The two on-chip operational amplifiers and three comparators of the DSPIC33EP256MC502T-I/SO let it act as its own analog front end for sensor systems: current shunts, thermistors, and pressure bridges can be amplified by the internal op amps and threshold-detected by the comparators before ADC conversion. This integration reduces component count on dense sensor boards and shortens the analog signal path, improving noise immunity. The 12-class ADC (see family datasheet for exact resolution) samples conditioned signals while the 70 MIPS core applies DSP filtering - averaging, IIR/FIR, or FFT-based analysis - in real time. Applications include motor current signature analysis, power metering, and condition-monitoring nodes that stream processed data over UART, SPI, I2C, or CAN.
Recommended
Embedded Control with Field Firmware Updates
The 256KB self-programmable Flash of the DSPIC33EP256MC502T-I/SO makes it well suited to products that require in-field firmware updates. Applications can implement bootloaders over UART, I2C, or CAN, storing dual images or configuration blocks in Flash so a failed update can roll back safely. The 70 MIPS core keeps application performance unchanged while bootloader code occupies Flash, and the -40C to +85C operating range allows deployment in outdoor and industrial equipment. Typical usage splits Flash between a permanent bootloader and the application; the device reprograms itself at runtime without an external programmer, only the MCLR/PGD/PGC pins needed for factory initial programming via standard Microchip debug tools.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP256MC502T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256MC502T-E/SO | DSPIC33EP256MC502-H/SO | DSPIC33EP256MC502-I/SO | DSPIC33EP128MU502-E/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (WSOIC-28) | 28-SOIC (WSOIC-28) - same | 28-SOIC (WSOIC-28) - same | 28-SOIC (WSOIC-28) - same | 28-SOIC (WSOIC-28) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 256KB | 256KB | 256KB | 256KB | 128KB |
| CPU Performance | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Operating Temperature | -40C to +85C (I grade) | -40C to +125C (E grade) | Automotive H grade | -40C to +85C (I grade) | -40C to +125C (E grade) |
| USB Peripheral | No | No | No | No | Yes (MU = USB variant) |
Key Differentiators
- Extended temperature option on identical footprint (vs DSPIC33EP256MC502T-E/SO)
- Automotive-qualified drop-in (vs DSPIC33EP256MC502-H/SO)
- More Flash than the MU sibling (vs DSPIC33EP128MU502-E/SO)
Design Notes
Decouple every VDD/VSS pair with a 100 nF low-ESR ceramic capacitor placed within 2 mm of the pins, plus one bulk 4.7-10 uF capacitor near the device. On the 28-SOIC wide-body footprint, route the analog references (VDDCORE/VCAP bulk capacitor per family datasheet requirements) away from PWM switching loops. The on-chip op amp inputs should connect to short, guarded traces to the current-shunt resistors to preserve accuracy in the noisy motor-drive environment.
Keep the PWM output traces to gate drivers short and, when possible, route them on a layer adjacent to a solid ground plane to control edge rates and radiated emissions. Separate analog ground returns for the op amps/comparators from the power ground of the inverter stage, joining them at a single star point. Reserve pad access to MCLR, PGD, and PGC for in-circuit programming - even in production, keeping these test points simplifies field diagnosis of dsPIC33EP-based drives.
Do not confuse package variants when sourcing: the /SS (SSOP-28) and /MM (QFN) suffixes are the same die but are NOT drop-in on a WSOIC-28 footprint. Verify the RAM size against the current family datasheet revision, since secondary sources disagree (16KB vs 32KB reported for this part). Also confirm the VCAP/VDDCORE capacitor value and type from the official datasheet - omitting or undersizing it is the most common cause of dsPIC33EP startup failures at 70 MIPS.
Compliance Information
Compliance status not explicitly stated in the retrieved web data for this exact ordering code. Verify on the Microchip product page. The H suffix variant family serves automotive builds; this I-grade part is not the AEC-Q100-qualified option.
