DSPIC33CK256MP205-I/M4 - 100MHz 16-bit DSC 256KB Flash | Microchip
MPN: DSPIC33CK256MP205-I/M4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.16 | $2.16 |
| 10 | $1.98 | $19.80 |
| 100 | $1.76 | $176.00 |
| 500 | $1.58 | $790.00 |
| 1,000 | $1.42 | $1,420.00 |
DSPIC33CK256MP205-I/M4 Overview
A digital signal controller is a hybrid device that merges the deterministic control of a microcontroller with the math acceleration of a digital signal processor. In the power-management hierarchy, the DSC sits above general-purpose MCUs for control-loop intensive tasks, making the dsPIC33CK family a staple for switched-mode power conversion, motor control, and advanced sensing where fast, repeatable interrupt latency and high-resolution PWM are essential.
Key features include operation from 3.0V to 3.6V at up to 100 MIPS, dual-partition Flash enabling live firmware updates, a modified Harvard architecture with a 24-bit instruction word, and high-resolution PWM suited to digital power topologies. Integrated analog (3 op-amps, 3 comparators) reduces external component count in current-sense loops. Peripherals Targeting GPIO (PTG) adds programmable trigger-based sequencing independent of the CPU.
Architecturally, the dsPIC33CK core adds DSP instructions with a barrel shifter, single-cycle MAC, and hardware division options, letting a single control loop execute proportional-integral and transform math within one PWM period at 100 MHz execution.
Typical applications include digital power supplies, PFC stages and LLC converters, brushless DC and PMSM motor drives, and power-sensitive industrial control where CAN Flexible Data (CAN FD) communication is required on higher-memory family variants.
Design consideration: keep the 3.0V to 3.6V operating window in mind for 5V-tolerant I/O designs and follow the datasheet decoupling recommendations for the UQFN exposed pad.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33CK256MP205-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 DSPIC33CK256MP205-I/M4 (same form factor and footprint) — differing in Core, Operating Temperature, Package, Architecture, Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK256MP205-E/M4
✅ Drop-In✓ In Stock
$1.87 / Unit
View Datasheet →DSPIC33CK256MP205-H/M4
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK256MP505-I/M4
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK256MP205-I/M4 Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC |
| Max Operating Frequency | 100 MHz (100 MIPS) |
| Program Memory Size | 256 KB (256K x 8) Flash |
| Data SRAM Size | 24 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Number of Op-Amps | 3 |
| Number of Comparators | 3 |
| Flash Features | ECC, dual-partition Live Update |
| SRAM Features | Memory Built-In Self-Test (MBIST) |
| Special Peripherals | Peripherals Targeting GPIO (PTG) |
| Architecture | Modified Harvard, 24-bit instruction word |
| Package | 48-UQFN (6x6 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Pin Count | 48 |
| HTSUS Code | 8542.31.0001 |
| Family | dsPIC 33CK, Functional Safety (FuSa) capable |
DSPIC33CK256MP205-I/M4 48-uqfn (6x6 mm) Pin Configuration Guide
Pin configuration for DSPIC33CK256MP205-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 DSPIC33CK256MP205-I/M4.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK256MP205-I/M4 is suitable for 6 applications: Digital Power Supplies, BLDC and PMSM Motor Control, Industrial Automation and Control, Advanced Sensing and Control Systems, Portable and Space-Constrained Devices, Test and Measurement Equipment.
Digital Power Supplies
The DSPIC33CK256MP205-I/M4 fits digital power conversion because its 100 MIPS core closes voltage and current loops inside a single switching period, and its high-resolution PWM delivers the sub-nanosecond effective resolution needed for LLC, PFC, and synchronous buck topologies. The three on-chip op-amps amplify shunt or current-transformer signals while the three comparators provide hardware overcurrent trip paths that act without CPU intervention, meeting fast fault-response requirements. In a typical design the DSC reads feedback through its ADC, executes PI compensation with DSP MAC instructions, and updates PWM duty every cycle at switching frequencies of several hundred kHz. Unlike fixed-function controllers, firmware enables soft-start profiles, non-linear gain scheduling, and telemetry over serial links. The trade-off versus analog control is firmware validation effort, offset by Live Update dual-partition Flash for safe field upgrades.
Recommended
BLDC and PMSM Motor Control
For brushless DC and permanent-magnet synchronous motor drives, the DSPIC33CK256MP205-I/M4 combines the computation headroom to run field-oriented control (FOC) at high PWM frequencies with the analog integration to minimize the sensing front end. Its 100 MIPS core with single-cycle MAC executes Clarke/Park transforms and PI current loops within each PWM period, supporting sinusoidal commutation with low torque ripple. The three integrated op-amps condition low-side shunt phase currents, and the three comparators implement cycle-by-cycle current limiting in hardware, a critical safety path during stall or overload events. Peripherals Targeting GPIO (PTG) can sequence ADC sampling and PWM updates autonomously, offloading deterministic timing from the CPU so the main loop handles speed control and communication. The dual-partition Flash allows firmware field updates in deployed motor products without a service visit.
Recommended
Industrial Automation and Control
In industrial control nodes, the DSPIC33CK256MP205-I/M4 provides deterministic 16-bit control plus enough DSP throughput for filtering and transform math, all in a compact 6x6 mm UQFN-48 that suits dense I/O modules. Its -40C to +85C industrial rating and functional-safety-capable (FuSa) family positioning support deployments on factory floors, while ECC-protected Flash guards against bit-flip corruption in electrically noisy environments. The 24KB MBIST-verified SRAM allows self-test routines at boot for fault detection schemes. Fast interrupt response and independent peripherals (comparators, PTG) keep critical timing loops alive even if the main firmware is servicing communication. Designs requiring fieldbus connectivity can step to the pin-compatible DSPIC33CK256MP505-I/M4, which adds CAN FD on the same footprint, simplifying a platform migration to heavier communication demands without a PCB respin.
Recommended
Advanced Sensing and Control Systems
Sensor-intensive systems benefit from the DSPIC33CK256MP205-I/M4's ability to perform on-chip signal conditioning and DSP-class filtering close to the sensing element. The three op-amps can be configured as gain stages for bridge or shunt sensors, while the 100 MIPS core runs FIR/IIR filters and FFT windows using hardware MAC and barrel-shifter instructions, reducing host-processor load in distributed architectures. Deterministic ADC sampling triggered by PTG hardware ensures coherent sampling across channels without CPU jitter, improving measurement repeatability. The 24KB SRAM accommodates buffering blocks of samples for spectral analysis, and the ECC-protected Flash preserves calibration tables and logging through power disturbances. Typical uses include precision instrumentation front ends, condition-monitoring nodes, and closed-loop process controllers where measurement integrity and long-term firmware maintainability both matter.
Recommended
Portable and Space-Constrained Devices
The 48-UQFN (6x6 mm) package of the DSPIC33CK256MP205-I/M4 makes it attractive for compact, power-conscious equipment such as handheld instruments, battery-powered controllers, and dense mixed-signal boards. A single 3.0V to 3.6V supply simplifies the power tree relative to multi-rail processors, and the on-chip analog eliminates several external ICs, shrinking both BOM and board area. The 100 MIPS performance allows aggressive duty-cycling: heavy DSP work bursts complete quickly, after which the device can idle in low-power modes between events, stretching battery life versus running a slower MCU continuously. Dual-partition Live Update enables field firmware upgrades over a USB or serial link without disassembly. Designers must respect the thermal pad soldering requirements of the UQFN package during reflow to achieve rated electrical and thermal performance on small PCBs.
Recommended
Test and Measurement Equipment
In bench and embedded test instruments, the DSPIC33CK256MP205-I/M4 serves as a deterministic control engine for trigger timing, calibration sequencing, and waveform generation duties beneath a higher-level processor or as the primary controller in cost-sensitive instruments. Its 100 MIPS core with DSP instructions generates precisely timed pulse trains via high-resolution PWM, while the PTG peripheral plays out scripted trigger sequences independent of software latency, valuable for reproducible measurement setups. The MBIST-capable SRAM and ECC Flash support the self-test reporting that measurement products increasingly require. The 6x6 mm UQFN-48 integrates into probe bodies and handheld meters where board space is scarce, and the 3.0V to 3.6V single-rail operation pairs cleanly with modern low-power analog front ends. The Live Update feature permits feature updates in the field as measurement requirements evolve.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK256MP205-I/M4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK256MP205-E/M4 | DSPIC33CK256MP205-H/M4 | DSPIC33CK256MP505-I/M4 |
|---|---|---|---|---|
| Package | 48-UQFN (6x6 mm) | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Operating Frequency | 100 MHz (100 MIPS) | 100 MHz (100 MIPS) | 64 MHz | 100 MHz (100 MIPS) |
| Flash Memory | 256 KB with ECC, dual-partition | 256 KB with ECC, dual-partition | 256 KB | 256 KB |
| SRAM | 24 KB | 24 KB | 24 KB | 24 KB |
| On-Chip Analog | 3 Op-Amps, 3 Comparators | 3 Op-Amps, 3 Comparators | 3 Op-Amps, 3 Comparators | 3 Op-Amps, 3 Comparators |
| Special Features | PTG, Live Update, MBIST | PTG, Live Update, MBIST | Reduced-speed grade of same die | CAN FD enabled |
Key Differentiators
- Full 100 MHz performance in industrial grade (vs DSPIC33CK256MP205-H/M4)
- Standard industrial rating at lower qualification cost (vs DSPIC33CK256MP205-E/M4)
- Op-amp/comparator integration without CAN FD register complexity (vs DSPIC33CK256MP505-I/M4)
Design Notes
The 48-UQFN (6x6 mm) M4 package requires a solid exposed-pad connection for thermal and ground performance. Design the PCB land pattern per Microchip's UQFN application guidance, with an array of thermal vias (typically 4x4 or denser) under the pad tied to the ground plane. For hand rework, note the 0.5 mm pin pitch demands care; consider the DSPIC33CK256MP205-I/PT TQFP variant for prototyping before committing to the UQFN in production. Verify stencil aperture design to avoid solder voiding under the die paddle.
The device operates from a 3.0V to 3.6V single rail. Place 0.1 uF ceramic decoupling capacitors at each VDD pin pair, as close to the package as possible, plus a bulk 10 uF capacitor nearby. If the board also carries a 5V domain, ensure level compatibility on shared signals before connecting - do not assume 5V tolerance on all pins without checking the datasheet I/O electrical characteristics. Configure brown-out reset in firmware to prevent corrupted Flash writes during supply dips, which matters when using Live Update dual-partition programming.
Do not assume the DSPIC33CK256MP505 (CAN FD variant) firmware is binary-compatible: although it shares the 48-UQFN footprint and memory size, peripheral register maps and pin multiplexing can differ between MP205 and MP505 variants. Always recompile and verify against the correct device header. Similarly, the -H/M4 grade runs at 64 MHz, not 100 MHz - code relying on exact loop timing must recalculate PWM and baud constants. Verify PTG sequencing configurations when migrating between family members.
Compliance Information
Compliance details were not present in the verified web data retrieved. Confirm RoHS/REACH status on the official Microchip product page or datasheet ordering section before export documentation.
