DSPIC33CK128MC505-I/PT - 100MHz 16-bit DSC, CAN FD | Microchip
MPN: DSPIC33CK128MC505-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.75 | $275.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.41 | $2,410.00 |
DSPIC33CK128MC505-I/PT Overview
A Digital Signal Controller combines the computational capability of a digital signal processor (DSP) with the peripheral integration and deterministic control of a microcontroller (MCU). Within the power-management hierarchy of embedded systems, the DSC sits between a general-purpose MCU and a dedicated DSP, offering single-cycle MAC and DSP instructions plus tightly coupled motor-control peripherals, making it a natural fit for closed-loop power electronics.
Key features include the high-speed PWM module with multiple complementary outputs for switching converters and motor drives, a 12-bit ADC pipeline capable of sampling at rates suited to current-loop control, CAN Flexible Data-Rate (CAN FD) connectivity for industrial and automotive networks, multiple UART/SPI/I2C serial interfaces, and direct memory access (DMA) channels that offload data movement from the CPU.
The dsPIC33CK family uses an enhanced 16-bit dsPIC core executing up to 100 MIPS, with hardware DSP multiply-accumulate, barrel shifter, and modulo addressing. On-chip peripherals are connected through a high-bandwidth internal bus, and several analog comparators and op-amp style analog front-end resources support sensorless motor control and power conversion feedback loops without external amplification stages.
Typical applications include brushless DC (BLDC) and PMSM motor drives, digital power supplies (LLC, totem-pole PFC), solar micro-inverters, and industrial automation nodes that require CAN FD communication. The 100 MHz core closes high-bandwidth current loops that slower MCUs cannot.
When designing with this device, connect all VDD and VSS pins, and pair PGECx/PGEDx pins correctly for ICSP programming, since mixing pairs from different debug channels will cause programming to fail.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33CK128MC505-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 DSPIC33CK128MC505-I/PT (same form factor and footprint) — differing in ADC Resolution, Operating Temperature, PWM, Package, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK256MC505-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.3 / Unit
View Datasheet →DSPIC33CK64MC505-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK128MC505-E/PT
✅ Drop-In✓ In Stock
$4.05 / Unit
View Datasheet →DSPIC33CK128MC505-H/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK32MC505-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK128MC505-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC DSC |
| Core Speed | 100 MHz (up to 100 MIPS) |
| Flash Program Memory | 128 KB (128K x 8) |
| RAM | 16 KB |
| Package | 48-TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Connectivity | CAN FD, UART, SPI, I2C |
| ADC Resolution | 12 bit |
| PWM | High-Speed PWM module |
| DMA Channels | 4 |
| External Interrupts | 4 |
| Operating Temperature | -40C to +85C (I grade) |
| Programming Interface | ICSP (PGECx/PGEDx pairs) |
| RoHS Status | Compliant |
| Lifecycle Status | Active |
DSPIC33CK128MC505-I/PT 48-tqfp (7x7 mm) Pin Configuration Guide
Pin configuration for DSPIC33CK128MC505-I/PT (48-tqfp (7x7 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 DSPIC33CK128MC505-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK128MC505-I/PT is suitable for 6 applications: BLDC / PMSM Motor Control, Digital Power Supplies (PFC / LLC), Industrial Automation and CAN FD Nodes, Solar Micro-Inverters, Battery Management and Charging Systems, Embedded Sensing and IoT Control Nodes.
BLDC / PMSM Motor Control
The DSPIC33CK128MC505-I/PT is purpose-built for brushless DC and permanent-magnet synchronous motor drives. Its high-speed PWM module generates complementary outputs with hardware dead-time insertion for a three-phase inverter bridge, while the 12-bit ADC samples phase currents fast enough to close field-oriented control (FOC) loops at high bandwidth on the 100 MHz core. On-chip analog comparators provide cycle-by-cycle overcurrent trip, and sensorless operation is supported via back-EMF or observer algorithms using the DSP MAC instructions. Placed between the gate drivers and the current-sense shunts, the DSC replaces discrete control logic; the trade-off versus a dedicated motor ASIC is firmware flexibility at the cost of development effort.
Recommended
Digital Power Supplies (PFC / LLC)
In digital power conversion such as totem-pole PFC and LLC resonant converters, the DSPIC33CK128MC505-I/PT provides the high-resolution, high-speed PWM needed for switching frequencies in the hundreds of kilohertz, plus fast ADC sampling of input/output voltage and inductor current. The 100 MIPS core executes voltage and current loop compensators deterministically, and the DMA channels stream ADC results without CPU intervention to minimize control-loop jitter. Firmware-defined control enables adaptive burst mode, soft-start, and digital telemetry via CAN FD or UART to a system host. Compared with an analog controller, the DSC adds BOM flexibility; the key design consideration is ensuring the PWM resolution meets the target converter frequency.
Recommended
Industrial Automation and CAN FD Nodes
The integrated CAN Flexible Data-Rate module makes the DSPIC33CK128MC505-I/PT a strong fit for industrial automation nodes, PLC I/O modules, and smart actuators. CAN FD carries up to 64-byte payloads at data rates beyond classical CAN, enabling richer telemetry and faster network cycles; the DMA controller offloads message buffers so the 100 MHz CPU remains dedicated to application logic. Multiple UART, SPI, and I2C ports connect local sensors and HMI peripherals, while four external interrupts support time-critical position or limit-switch events. In factory networks bridging legacy CAN and modern CAN FD backbones, this single DSC handles both the protocol and the local real-time control loop.
Recommended
Solar Micro-Inverters
Solar micro-inverter designs require simultaneous MPPT control, grid-synchronized DC/AC inversion, and safety monitoring - all within tight efficiency budgets. The DSPIC33CK128MC505-I/PT addresses this with its high-speed PWM driving the power stages, a 12-bit ADC sampling PV voltage/current for maximum-power-point tracking algorithms, and DSP instructions executing notch and resonant controllers for low-THD grid current. The 128 KB Flash accommodates grid-compliance code, anti-islanding protection, and communication firmware with room for field updates. Operating from the -40C to +85C industrial range, the controller survives rooftop enclosure temperatures, though the extended -E grade is advisable for the hottest installations.
Recommended
Battery Management and Charging Systems
In battery chargers and battery management systems, the DSPIC33CK128MC505-I/PT executes charging state machines (CC/CV, taper, balancing) while monitoring cell voltages and pack temperature through its 12-bit ADC. The high-speed PWM controls a synchronous buck or LLC charging stage with adaptive current limits, and CAN FD connects the pack to vehicle or inverter controllers in 48V and traction applications. The 100 MHz core supports coulomb-counting and impedance-estimation algorithms in real time, while DMA-driven ADC sampling keeps measurement timing consistent across temperature. Careful firmware attention to watchdog supervision and safe-state entry is critical, since a stalled charging controller can overcharge cells.
Recommended
Embedded Sensing and IoT Control Nodes
Beyond power electronics, the DSPIC33CK128MC505-I/PT serves as a high-performance sensing and control node in IoT and smart-home equipment. The DSP capability accelerates real-time signal filtering - FIR/IIR filtering of sensor streams for vibration, acoustic, or power-quality analysis - while SPI/I2C/UART interfaces connect external sensors and radios. The 128 KB Flash stores protocol stacks and OTA-capable firmware, and low peripheral-latency interrupt handling supports precise timing of pulsed sensor outputs. Compared with a general-purpose MCU, the DSC adds local DSP throughput without a co-processor; compared with a pure DSP, it retains full microcontroller peripherals, reducing overall system BOM count and board area.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK128MC505-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK256MC505-I/PT | DSPIC33CK64MC505-I/PT | DSPIC33CK128MC505-E/PT | DSPIC33CK32MC505-I/PT |
|---|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 256 KB | 64 KB | 128 KB | 32 KB |
| Core Speed | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C |
| CAN FD | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Balanced 128 KB Flash for cost-optimized FOC firmware (vs DSPIC33CK256MC505-I/PT)
- Extended temperature option available in same footprint (vs DSPIC33CK128MC505-E/PT)
- Integrated CAN FD removes external controller (vs DSPIC33CK64MC505-I/PT)
Design Notes
ICSP programming requires a matched PGECx/PGEDx pair: if PGEC2 carries ICSPCLK, ICSPDAT must connect to PGED2 - mixing pins from different debug pairs causes programming failure. Connect ALL VDD and VSS pins; even one unconnected power pin can prevent successful programming. Route the ICSP header to a chosen pair during layout and document it on the schematic to avoid rework.
Use solid ground planes under the 48-TQFP (7x7 mm, 0.5 mm pitch) and add thermal vias near the die center to spread heat into inner layers. Decouple each VDD pin with a 100 nF ceramic capacitor placed within 2-3 mm of the pin, plus one bulk 10 uF capacitor per supply domain. Keep the high-speed PWM outputs routed away from ADC analog inputs and current-sense lines to minimize switching-noise coupling into control-loop measurements.
The 100 MHz core driving long PWM trace runs on a three-phase inverter can inject significant switching noise into the 3.3 V rail. Estimate supply current budget from the datasheet per-module values and derate for worst-case core utilization; add local bulk capacitance near the motor gate-driver supply stage. Verify the internal LDO/regulator configuration in firmware before enabling high-frequency operation, and validate ADC reference stability with a precision reference such as the MCP1501 for measurement-critical loops.
Compliance Information
RoHS compliant per distributor listings. REACH and halogen-free status not stated in provided data - obtain declaration from Microchip.
