DSPIC33CK128MP205-I/M4 - 100MHz 16-bit DSC, 128KB Flash | Microchip
MPN: DSPIC33CK128MP205-I/M4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.6 | $26.00 |
| 100 | $2.35 | $235.00 |
| 500 | $2.2 | $1,100.00 |
| 1,000 | $2.1 | $2,100.00 |
DSPIC33CK128MP205-I/M4 Overview
A digital signal controller is a class of processor that merges the control-flow convenience of a microcontroller (MCU) with the multiply-accumulate throughput of a digital signal processor (DSP). Within the power management hierarchy, the DSC sits at the embedded control layer of a digital power supply, motor drive, or power inverter, executing the current and voltage control loops that analog controllers previously implemented in hardware. The dsPIC33CK single-core family is Microchip's cost-optimized 100 MHz DSC line for these real-time control applications.
Key features include the modified Harvard architecture dsPIC33CK core delivering 100 MIPS with DSP instruction support, up to dual-partition Flash with ECC and Live Update for field firmware upgrades, and functional-safety (FuSa) support documentation. The peripheral set relevant to power electronics includes High-Resolution PWM outputs with sub-nanosecond duty-cycle resolution and a CAN FD module for automotive and industrial networking.
Technical depth: the 24-bit instruction word with fixed-point DSP instructions (MAC, dual operand fetch) enables single-cycle multiply-accumulate operations, which shortens the execution time of PID and filter routines in control loops running at 100 kHz to 1 MHz switching frequencies. Flash ECC continuously protects program memory, and MBIST supports memory built-in self-test required by safety-oriented designs.
Typical applications include digital power supplies ( LLC, totem-pole PFC ), brushless DC and PMSM motor control for industrial drives, and solar micro-inverter or EV onboard charger control stages, where 100 MIPS headroom and fast PWM matter.
Design consideration: the 3.0V to 3.6V supply window means the 5V-tolerant design practice of older dsPIC33 families does not apply; level-shift CAN FD and 5V sensor interfaces accordingly, and decouple all VDD/AVDD pairs with 100 nF capacitors placed close to the UQFN pads.
This page synthesizes distributor pricing, drop-in alternatives, comparison tables, and practical design notes beyond the manufacturer datasheet, with pricing referenced as of 2026-09-22.
Drop-in alternatives for DSPIC33CK128MP205-I/M4 — 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 DSPIC33CK128MP205-I/M4 (same form factor and footprint) — differing in Operating Temperature, Package, Core, PWM, CPU Speed.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK128MP205-E/M4
✅ Drop-In✓ In Stock
$8.9 / Unit
View Datasheet →DSPIC33CK128MP205-H/M4
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK256MP205-I/M4
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.42 / Unit
View Datasheet →DSPIC33CK64MP205-I/M4
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK32MP205-I/M4
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.39 / Unit
View Datasheet →DSPIC33CK128MP205-I/M4 Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC core |
| CPU Speed | 100 MHz (100 MIPS) |
| Core Architecture | Modified Harvard, single-core, with DSP instructions |
| Program Memory (Flash) | 128 KB (128K x 8) with ECC and Live Update (dual-partition) |
| Operating Voltage | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 48-UQFN (6x6 mm) |
| Mounting Type | Surface Mount |
| Connectivity | CAN FD, I2C, SPI, UART/USART, IrDA, LINbus |
| PWM | High-Resolution PWM (per family feature set) |
| Product Type | Functional Safety (FuSa) capable DSC |
| Family | dsPIC 33CK Digital Signal Controllers |
| Qualification Family Temperature | -40C to +150C (E/extended grade variant available) |
| Packaging | Tray |
DSPIC33CK128MP205-I/M4 48-uqfn (6x6 mm) Pin Configuration Guide
Pin configuration for DSPIC33CK128MP205-I/M4 (48-uqfn (6x6 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 DSPIC33CK128MP205-I/M4.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK128MP205-I/M4 is suitable for 6 applications: Digital Power Supplies (LLC / Totem-Pole PFC), BLDC / PMSM Motor Control, Automotive and Industrial CAN FD Networking Nodes, Solar Micro-Inverters and EV Onboard Chargers, Advanced Sensing and Control (Functional Safety Oriented), High-Integrity Embedded Control (IoT Gateways / Industrial Servers).
Digital Power Supplies (LLC / Totem-Pole PFC)
The DSPIC33CK128MP205-I/M4 fits digital power conversion because its 100 MHz (100 MIPS) dsPIC33CK core executes voltage- and current-loop compensation fast enough for switching frequencies in the hundreds of kilohertz, while High-Resolution PWM delivers the fine duty-cycle granularity LLC and totem-pole PFC stages need for tight regulation. In a typical topology, the DSC reads output voltage and inductor current through its on-chip ADC, runs a PID or 2P2Z compensator using single-cycle DSP MAC instructions, and updates PWM comparators within one control period. Unlike fixed-frequency analog controllers, firmware-based control adapts across wide input ranges, and Flash ECC plus Live Update allows firmware field updates. The trade-off is loop tuning effort in software versus hardware error amplifiers, offset by Microchip digital power reference designs and plugin modules built on this exact family.
Recommended
BLDC / PMSM Motor Control
The DSPIC33CK128MP205-I/M4 is well suited to brushless DC and permanent-magnet synchronous motor control because the 100 MHz core closes FOC (field-oriented control) current loops at the 10-20 kHz rates demanded by industrial drives, and the High-Resolution PWM plus complementary outputs drive a three-phase inverter with precise dead-time control. Peripherals such as the quadrature encoder interface and op-amp/comparator resources reduce external component count for rotor-position sensing, while CAN FD connects the drive to a factory automation network. The 128 KB Flash with ECC stores FOC mathematics, ramp generators, and fault handling with headroom for protocol stacks. Compared with a general-purpose MCU, the integrated DSP engine executes Park/Clarke transforms and PI current controllers with single-cycle MACs; compared with a dedicated gate-driver ASIC, firmware control allows sensorless startup algorithms and adaptive tuning for varied motor payloads.
Recommended
Automotive and Industrial CAN FD Networking Nodes
With its integrated CAN Flexible Data (CAN FD) module, the DSPIC33CK128MP205-I/M4 serves as an intelligent node in automotive body control and industrial machine networks that have migrated from classical CAN to CAN FD for 64-byte payloads and faster data-phase bit rates. The -I grade covers -40C to +85C ambient suitable for cabin and industrial cabinet environments, while the pin-compatible -E/M4 variant extends to under-hood temperatures on the same PCB. The 100 MHz core handles both the control task and the CAN FD stack concurrently, and the 128 KB dual-partition Flash with Live Update permits firmware updates in the field without removing the unit from service. Design consideration: the 3.0V-3.6V supply requires a 3.3V CAN FD transceiver with correct termination (typically 120 ohm split termination) and attention to CISPR-style EMI layout on the UQFN-48 ground return.
Recommended
Solar Micro-Inverters and EV Onboard Chargers
The DSPIC33CK128MP205-I/M4 matches renewable-energy and charging power stages that combine a fast control loop with a communication requirement. In a solar micro-inverter, the controller runs maximum-power-point-tracking (MPPT) on the DC side while shaping the AC output current waveform, tasks that benefit from the 100 MIPS DSP throughput and High-Resolution PWM phase management for interleaved stages. In an EV onboard charger PFC or DC-DC stage, the same core executes power-factor correction and battery-current regulation, and CAN FD reports status to the vehicle network. Flash ECC and the FuSa support package address the reliability expectations of grid-tied equipment. Because these designs run high ambient temperatures near power components, many teams select the footprint-identical DSPIC33CK128MP205-E/M4 extended-temperature variant during layout freeze, keeping the PCB unchanged across I and E grades.
Recommended
Advanced Sensing and Control (Functional Safety Oriented)
Microchip positions the dsPIC33CK family, including the DSPIC33CK128MP205-I/M4, for advanced sensing and control with Functional Safety (FuSa) support, making it appropriate for safety-relevant industrial monitoring nodes such as overcurrent supervisory units, pressure and flow control loops, and machine-guard controllers. Hardware mechanisms underpin the safety case: program Flash ECC detects and corrects single-bit memory faults, data SRAM includes Memory Built-In Self-Test (MBIST), and the 100 MHz core provides deterministic interrupt latency for deadline-driven sampling. The 128 KB Flash accommodates both the application and diagnostic self-test code, while dual-partition Live Update allows safety-relevant firmware to be verified before switching banks. Design consideration: to claim functional-safety metrics, use Microchip's FuSa support package and follow the datasheet operating conditions strictly (3.0V-3.6V, -40C to +85C for the I grade) and configure watchdog and clock-failure supervision.
Recommended
High-Integrity Embedded Control (IoT Gateways / Industrial Servers)
Beyond power and motion, the DSPIC33CK128MP205-I/M4 acts as a high-integration real-time coprocessor or standalone controller in industrial computing equipment, where its DSP engine offloads filtering, FFT-based condition monitoring, or protocol translation from a host processor. Connectivity spans UART/USART, SPI, I2C, IrDA, and LINbus in addition to CAN FD, allowing a single UQFN-48 device to bridge legacy serial devices onto a modern CAN FD backbone in a rack or gateway chassis. The 100 MIPS budget and hardware divide support signal-processing tasks with deterministic timing, while ECC-protected Flash guards long-uptime deployments against bit-rot. Compared with a software-only solution on a Linux gateway, this DSC guarantees microsecond-level response for interlocks and emergency stops. The compact 6x6 mm UQFN conserves board area on dense carrier boards, and the 3.3V supply integrates directly with standard embedded I/O rails.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK128MP205-I/M4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK128MP205-E/M4 | DSPIC33CK128MP205-H/M4 | DSPIC33CK256MP205-I/M4 | DSPIC33CK64MP205-I/M4 |
|---|---|---|---|---|---|
| Package | 48-UQFN (6x6 mm) | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 100 MHz | 100 MHz | 64 MHz | 100 MHz | 100 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 64 KB |
| CAN FD | Yes | Yes | Yes | Yes | Yes |
| Flash ECC / Live Update | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Full 100 MHz speed grade on the MP205 memory/IO configuration (vs DSPIC33CK128MP205-H/M4)
- Industrial temperature rating suited for cost-optimized designs (vs DSPIC33CK128MP205-E/M4)
- Memory headroom matched to the 48-pin platform (vs DSPIC33CK64MP205-I/M4)
Design Notes
The dsPIC33CK128MP205 requires a 3.0V-3.6V single rail; there is no 5V operating mode. Provide a clean 3.3V LDO or buck output rated for the DSC plus I/O loads, and decouple every VDD and AVDD pin pair with 100 nF ceramic capacitors placed within 2 mm of the UQFN pads, plus bulk 10 uF near the package. Keep the analog supply filtered (ferrite bead from the digital rail to AVDD) to preserve ADC accuracy in control-loop sampling. Estimated: for a typical 60 mA core-active load at 3.3V, dissipation inside the UQFN-48 is under 0.2 W, so no heatsinking is required; verify against the datasheet current tables for your clock configuration.
The 48-UQFN 6x6 mm has a 0.5 mm lead pitch and an exposed thermal pad that must be soldered to a grounded array of vias for both mechanical reliability and heat spreading. Per Microchip UQFN layout guidance, design the land pattern to the package drawing, place the MCLR programming trace with a 100 ohm-470 ohm series resistor for ICSP/ICD access, and route the OSCI/OSCO crystal traces short and guarded. Keep the CAN FD transceiver within 20-30 mm of the CANTX/CANRX pins with a common ground reference to minimize loop area and EMI.
Migrating from older dsPIC33F/30F designs is the most common error source: the CK family runs only at 3.0V-3.6V (no 5V tolerance practice), configuration-word and oscillator setup differ, and the High-Resolution PWM requires its own calibration routine at startup. Also confirm the temperature suffix on purchase orders - the I grade (this part) is limited to +85C; designs near power electronics should specify the -E/M4 variant, which is footprint-identical. Finally, reserve both Flash partitions when using Live Update so field firmware updates never brick deployed units.
Compliance Information
Compliance statuses were not stated in the provided verified web data; confirm on the Microchip product page compliance documents. The -I grade is a standard commercial/industrial part, not AEC-Q100 qualified.
