DSPIC33CK128MC503T-I/M5 - 16-bit DSC 128KB Flash CAN FD | Microchip
MPN: DSPIC33CK128MC503T-I/M5 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.15 | $41.50 |
| 100 | $3.71 | $371.00 |
| 500 | $3.34 | $1,670.00 |
| 1,000 | $3 | $3,000.00 |
DSPIC33CK128MC503T-I/M5 Overview
A digital signal controller combines the compute throughput of a DSP with the peripheral integration and ease of use of a microcontroller. Within the power-management hierarchy, the dsPIC33CK family sits between general-purpose MCUs and dedicated DSPs, offering single-cycle MAC/DSP instructions, fast interrupt handling, and deterministic control loops that make it the natural choice for closed-loop power conversion and motor control systems.
Key features include the single 100 MHz dsPIC DSC core with DSP-enhanced instruction set, on-chip operational amplifiers, a 12-bit high-speed ADC, advanced high-resolution PWM modules, and a CAN FD controller for automotive and industrial networking. Four DMA channels offload data movement from the CPU, and an internal fast RC oscillator with PLL removes the need for an external crystal in many designs.
Architecturally, the device uses a CMOS process with a modified Harvard bus, executing from zero-wait-state FLASH at full core speed. The ADC-PWM-OpAmp connectivity allows analog feedback loops to be closed entirely on-chip, minimizing CPU overhead in digital power applications. The Mouser listing explicitly identifies OpAmps, 12-bit ADC, PWM, and CAN FD as the peripheral set of this part.
Typical applications include brushless DC and PMSM motor control, digital switched-mode power supplies (LLC, totem-pole PFC), solar micro-inverters, and battery-management systems where CAN FD connectivity is required.
Designers should note the family supply range of approximately 3.0V to 3.6V and must budget the UQFN thermal pad soldering for reliable ground return during high-frequency PWM operation.
This page synthesizes distributor pricing, drop-in family alternatives, application guidance, and design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33CK128MC503T-I/M5 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
DSPIC33CK128MC503T-E/M5
β Drop-Inπ Reference alternative (not in catalog)
DSPIC33CK128MC503T-H/M5
β Drop-Inπ Reference alternative (not in catalog)
DSPIC33CK256MC503T-I/M5
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
DSPIC33CK64MC503T-I/M5
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
DSPIC33CK32MC503T-I/M5
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
DSPIC33CK128MC503T-I/M5 Maximum Ratings & Electrical Characteristics
| Core Processor | dsPIC33CK (16-bit dsPIC DSC) |
| Core Size | 16-bit |
| Maximum Clock Frequency | 100 MHz |
| Program Memory Size | 128 KB (128K x 8) FLASH |
| RAM Size | 16 KB |
| Connectivity | CAN FD, I2C, SPI, UART/USART |
| Peripherals | OpAmps, 12-bit ADC, High-Resolution PWM, DMA |
| DMA Channels | 4 |
| Package | 36-UQFN (5x5 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Technology | CMOS |
| Internal Oscillator | Yes (FRC with PLL) |
| Supply Voltage | 3.0 V to 3.6 V (typical family range) |
| Packaging | Tape & Reel (T suffix) |
| RoHS Status | Compliant |
| Product Family | dsPIC33CK128MC50x Digital Signal Controllers |
DSPIC33CK128MC503T-I/M5 36-uqfn (5x5 mm) Pin Configuration Guide
Pin configuration for DSPIC33CK128MC503T-I/M5 (36-uqfn (5x5 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 DSPIC33CK128MC503T-I/M5.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK128MC503T-I/M5 is suitable for 6 applications: BLDC / PMSM Motor Control, Digital Power Conversion (LLC / Totem-Pole PFC), Battery Management Systems with CAN FD, Solar Micro-Inverters, Industrial Sensing and Condition Monitoring, Automotive Body and Actuator Control Nodes.
BLDC / PMSM Motor Control
The DSPIC33CK128MC503T-I/M5 fits motor control because its 100 MHz DSP core executes field-oriented control (FOC) inner loops at 20-50 kHz with single-cycle MAC instructions, while the high-resolution PWM provides sub-nanosecond duty and dead-time adjustment for efficient sine-wave drive. The on-chip op-amps amplify low-side shunt currents directly, feeding the 12-bit ADC synchronously with PWM triggers so phase-current sampling is free of switching noise. In a typical PMSM servo drive, the DSC closes the current loop on-chip with ADC-DMA-PWM interconnects that add no CPU latency, reserving the CPU for the speed loop and communication. The CAN FD interface links the drive to a higher-level controller without an external CAN transceiver-controller pair.
Recommended
Digital Power Conversion (LLC / Totem-Pole PFC)
For digital switched-mode power supplies such as LLC resonant converters and totem-pole PFC stages, the DSPIC33CK128MC503T-I/M5 offers the deterministic analog-to-PWM datapath the topology demands. The 12-bit ADC samples input/output voltage and inductor current at rates up to millions of samples per second, and dedicated PWM-to-ADC triggers guarantee samples land at the midpoint of the switching period, removing ripple error. High-resolution PWM (sub-nanosecond steps) enables precise phase-shift and frequency control of LLC half-bridges, while the 100 MHz core runs voltage-mode or current-mode compensators at per-cycle rates. The internal FRC oscillator with PLL eliminates the external crystal, reducing BOM cost in isolated and compact power supplies.
Recommended
Battery Management Systems with CAN FD
In battery management systems, the DSPIC33CK128MC503T-I/M5 serves as the pack controller, combining multi-channel 12-bit ADC cell-voltage monitoring, on-chip op-amp current-shunt amplification, and a native CAN FD interface for vehicle or rack-level communication. The 128 KB FLASH holds state-of-charge and state-of-health algorithms including lookup tables and filtering code, while 16 KB RAM buffers measurement history. The industrial -40C to +85C operating range covers automotive cabin and industrialESS environments. Hardware DMA streams ADC results to RAM without CPU intervention, keeping worst-case interrupt latency low so protection functions (over-current, over-temperature) execute within microseconds of a fault event.
Recommended
Solar Micro-Inverters
Solar micro-inverters require simultaneous MPPT control, grid-synchronized current injection, and safety compliance in a compact, thermally constrained enclosure - a match for the DSPIC33CK128MC503T-I/M5's integrated feature set. The high-resolution PWM synthesizes the unipolar SPWM drive for the DC-DC and DC-AC stages, while the 12-bit ADC with DMA samples panel voltage/current and grid voltage for phase-locked-loop grid synchronization at per-switching-cycle rates. The 100 MHz DSP core runs MPPT perturb-and-observe or incremental-conductance algorithms concurrently with the control loops. On-chip op-amps condition AC current-sense signals, removing an external amplifier stage and shrinking PCB area.
Recommended
Industrial Sensing and Condition Monitoring
For vibration, pressure, and current condition-monitoring nodes, the DSPIC33CK128MC503T-I/M5 provides 12-bit analog acquisition, on-chip signal amplification, and digital filtering using its DSP multiply-accumulate capability, all in a single 5x5 mm device. The 128 KB FLASH stores FFT or FIR-filter firmware plus communication stacks, while the CAN FD or UART interfaces feed processed features to a PLC or gateway. The internal FRC oscillator supports startup without a crystal, and the industrial temperature rating covers cabinet-mounted installations. Four DMA channels enable continuous multi-channel capture - for example, three op-amp-amplified vibration channels sampled synchronously - without CPU loading, extending battery or loop-powered operation margins.
Recommended
Automotive Body and Actuator Control Nodes
The DSPIC33CK128MC503T-I/M5 supports automotive-adjacent actuator control - DC-mirror, pump, fan, and throttle modules - where CAN FD networking and deterministic motor control must coexist. The native CAN FD controller communicates with body controllers at FD data rates without an external protocol chip, and the high-resolution PWM plus 12-bit ADC closes current loops for brushed or BLDC actuators at audibly quiet PWM frequencies. The industrial -40C to +85C grade suits under-dash and trunk zones; for under-hood zones, designers can pin-select the same-footprint -E or -H temperature grade variants without PCB changes. The 100 MHz core also runs sensorless BEMF observers, removing hall-sensor wiring cost.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK128MC503T-I/M5 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK128MC503T-E/M5 | DSPIC33CK128MC503T-H/M5 | DSPIC33CK256MC503T-I/M5 | DSPIC33CK64MC503T-I/M5 | DSPIC33CK32MC503T-I/M5 |
|---|---|---|---|---|---|---|
| Package | 36-UQFN (5x5 mm) | 36-UQFN (5x5 mm) - same | 36-UQFN (5x5 mm) - same | 36-UQFN (5x5 mm) - same | 36-UQFN (5x5 mm) - same | 36-UQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| FLASH Program Memory | 128 KB | 128 KB | 128 KB | 256 KB | 64 KB | 32 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Core Speed | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Operating Temperature | -40C to +85C (I) | Extended range (-E) | High temperature (-H) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| CAN FD | Yes | Yes | Yes | Yes | Yes | Yes |
| Relative Cost (qty 1) | Baseline (~$4.62 as of 2026-09-22) | Higher (extended grade premium) | Higher (high-temp grade premium) | Higher (~+15-25%) | Lower (~-10-20%) | Lowest (~-20-30%) |
Key Differentiators
- Balanced 128 KB FLASH density at mid-family cost (vs DSPIC33CK256MC503T-I/M5)
- Full FLASH headroom vs low-cost family member (vs DSPIC33CK64MC503T-I/M5)
- Industrial temperature grade for standard environments (vs DSPIC33CK128MC503T-H/M5)
Design Notes
The 36-UQFN (5x5 mm) M5 package has a central exposed thermal pad that must be soldered to a grounded copper array for both thermal dissipation and the low-inductance ground return needed by fast PWM edges. Follow Microchip UQFN layout guidelines: via array of 4-9 vias under the pad connected to internal ground planes, and keep the decoupling capacitors for VDD, AVDD, and VDDCORE within 2 mm of their respective pins. Estimated: a 0.5 W dissipation in a 5x5 QFN with a solid ground plane typically yields theta_JA in the 40-50 C/W range - verify against the datasheet thermal table for your stack-up.
Power the dsPIC33CK core from a clean 3.3 V rail within the family range (approximately 3.0-3.6 V). The internal LDO requires its VDDCORE capacitor - typically 1 uF ceramic per Microchip reference designs - placed at the pin; omitting it prevents startup. During PWM-heavy motor control, the ADC reference should be separate from the noisy digital VDD: use AVDD filtered through an RC or ferrite bead, or a precision reference on the VREF+ pin for the 12-bit ADC to reach its effective-number-of-bits potential in current-sense loops.
High-resolution PWM outputs with sub-nanosecond edge resolution will couple into ADC inputs if layout is careless. Route op-amp and ADC analog traces away from PWM gate-drive signals, guard analog routing with ground, and use PWM-triggered ADC sampling at the switch-node quiet window. Common pitfall: remappable RPx pins let you place CAN TX/RX or UART on any pin, but verify the Peripheral Pin Select assignments before finalizing layout - swapping PPS later requires a PCB respin.
Distinguish order-code variants before purchase: the T suffix means Tape & Reel, and the -I/-E/-H suffixes denote industrial/extended/high temperature grades - they are footprint-compatible but not interchangeable in thermally demanding environments. Also note some third-party listings cite a 64 MHz maximum clock for this family; the Microchip family page states a single 100 MHz dsPIC DSC core, so design to the official 100 MHz figure and confirm Fcy configuration (PLL dividers) in code against the current datasheet.
Compliance Information
RoHS compliance inferred from current-production Microchip DSC status on distributor listings; REACH and halogen-free certificates were not stated in the provided data - verify on the Microchip product page certificate portal.
