DSPIC33CK256MP205-I/PT - 100MHz 256KB DSC 48-TQFP | Microchip
MPN: DSPIC33CK256MP205-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.75 | $47.50 |
| 100 | $4.25 | $425.00 |
| 500 | $3.9 | $1,950.00 |
| 1,000 | $3.55 | $3,550.00 |
DSPIC33CK256MP205-I/PT Overview
A digital signal controller combines the compute power of a DSP with the peripheral integration and deterministic interrupt behavior of a microcontroller. Within the power-management hierarchy, a DSC sits above general-purpose MCUs and below application processors, making it the standard choice for closed-loop control loops executing at switching frequencies of 100 kHz to 2 MHz, such as digital power conversion, motor control, and advanced sensing.
Key features of the DSPIC33CK256MP205 include a Modified Harvard architecture executing up to 100 MIPS from zero-wait-state Flash, dual-partition Flash with Live Update for field firmware upgrades, and Memory Built-In Self-Test (MBIST) on the SRAM for functional-safety designs. The analog front end integrates three on-chip operational amplifiers and three comparators, reducing external component count in current-sense circuits. High-Resolution PWM outputs and CAN Flexible Data (CAN FD) support make the device well suited to automotive-adjacent and industrial networking nodes.
Technically, the dsPIC33CK core uses a single-cycle MAC and dual operands with 40-bit accumulators, plus hardware divide support and DSP-class addressing modes. The 640-page family datasheet documents clock switching, DMAs, and peripheral trigger interconnects that let the ADC, PWM, and comparators interact without CPU intervention, keeping loop latency deterministic.
Typical applications include digitally controlled switch-mode power supplies ( LLC, totem-pole PFC ), brushless and PMSM motor drives ( FOC ), and high-precision sensing front ends, where the 100 MIPS core, 3 op-amps, and High-Resolution PWM directly address the control-loop bandwidth and analog-integration needs.
Design consideration: the device requires a VCAP capacitor on the internal regulator output and supports ICSP programming via any matched PGECx/PGEDx pair - they must be used as a pair (for example PGEC2 with PGED2), a common bring-up pitfall.
This page synthesizes distributor pricing context, verified drop-in alternatives within the dsPIC33CK family, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33CK256MP205-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 DSPIC33CK256MP205-I/PT (same form factor and footprint) — differing in Operating Temperature, Package, Data SRAM, On-chip Op-Amps, CAN Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK256MP205-E/PT
✅ Drop-In✓ In Stock
$3.92 / Unit
View Datasheet →DSPIC33CK128MP205-E/PT
✅ Drop-In✓ In Stock
$3.61 / Unit
View Datasheet →DSPIC33CK256MP205-I/PT Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC core |
| Max CPU Speed | 100 MHz (100 MIPS) |
| Architecture | Modified Harvard, single-core |
| Program Flash | 256 KB with ECC and Live Update (dual-partition) |
| Data SRAM | 24 KB with Memory Built-In Self-Test (MBIST) |
| Operating Voltage | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 48-TQFP (7x7 mm), code PT |
| Mounting Type | Surface Mount |
| On-chip Op-Amps | 3 |
| Comparators | 3 |
| PWM | High-Resolution PWM |
| CAN | CAN Flexible Data (CAN FD) |
| Programming Interface | ICSP via PGECx/PGEDx pairs |
| RoHS Status | Compliant |
| Datasheet Length | 640 pages (family datasheet) |
DSPIC33CK256MP205-I/PT 48-tqfp (7x7 mm), code pt Pin Configuration Guide
Pin configuration for DSPIC33CK256MP205-I/PT (48-tqfp (7x7 mm), code pt 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/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK256MP205-I/PT is suitable for 6 applications: Digital Switch-Mode Power Supplies, Brushless and PMSM Motor Drives, Advanced Sensing and Control Nodes, Wireless Charging and Resonant Converters, Automotive-Adjacent and Industrial CAN FD Networking, Functionally Safe Embedded Control.
Digital Switch-Mode Power Supplies
The DSPIC33CK256MP205-I/PT fits digitally controlled SMPS designs - LLC converters, totem-pole PFC, and buck stages - because its 100 MHz core executes 100 MIPS with single-cycle MAC, sustaining control-loop updates at 100 kHz-to-2 MHz switching frequencies. High-Resolution PWM provides sub-nanosecond duty-cycle resolution, eliminating limit-cycle oscillation in high-step-down converters, while the three on-chip op-amps buffer shunt-current signals into the ADC without external amplifiers. Placed as the primary controller with PWM outputs driving gate drivers, the DSC replaces analog compensation networks with firmware, enabling adaptive mode switching and telemetry over its CAN FD interface. The trade-off versus an analog controller is firmware development effort, repaid by flexibility across product variants.
Recommended
Brushless and PMSM Motor Drives
For BLDC and PMSM field-oriented control, the DSPIC33CK256MP205-I/PT combines the ingredients Microchip designed the dsPIC33CK family around: 100 MIPS of DSP headroom for the FOC current loop, three op-amps for low-side shunt amplification, and three comparators providing hardware overcurrent trip with no CPU latency. High-Resolution PWM generates center-aligned, dead-time-corrected six-phase drive signals with fine edge placement for acoustic-noise reduction. In a typical servo or e-bike drive, the DSC reads rotor position from an encoder or resolver, closes current loops each PWM cycle, and reports status over CAN FD. The 24 KB SRAM accommodates sensorless observer state variables; designs needing larger buffers should verify RAM sizing early.
Recommended
Advanced Sensing and Control Nodes
The DSPIC33CK256MP205-I/PT serves as a high-rate sensing and control node where analog integration matters: the three on-chip operational amplifiers condition sensor signals (current, pressure, bridge transducers) directly on-chip, and the 100 MHz core applies DSP filters - IIR, FIR, or FFT-based diagnostics - at kilohertz-to-megahertz sample rates. The 12-bit ADC pipeline synchronized to the PWM or a timer yields deterministic sampling, and MBIST on the 24 KB SRAM supports functional-safety arguments in industrial control. CAN FD or UART links stream processed results to a host controller. Compared with an MCU plus external analog front end, the dsPIC33CK reduces BOM count, board area, and inter-chip noise pickup in compact sensor modules.
Recommended
Wireless Charging and Resonant Converters
Resonant power stages - wireless charging pads and LLC converters - need precise frequency and phase control that the DSPIC33CK256MP205-I/PT delivers through its High-Resolution PWM phase-modulation hardware. The 100 MIPS core implements frequency-tracking control laws that keep the converter at resonance as coupling and load change, while on-chip comparators enforce burst-mode and fault boundaries in hardware. The 48-TQFP package offers enough I/O for the full H-bridge gate-drive set plus auxiliary ADC channels for coil-current and foreign-object detection sensing. Because Wireless Power Consortium profiles evolve, the firmware-defined controller lets one PCB serve multiple power classes - a flexibility advantage fixed-function transmitter ICs cannot match.
Recommended
Automotive-Adjacent and Industrial CAN FD Networking
With integrated CAN Flexible Data (CAN FD), the DSPIC33CK256MP205-I/PT functions as an intelligent actuator or gateway node on industrial buses running up to 8 Mbit/s data phases. The 100 MHz core services the CAN FD FIFO in hardware while executing the node's local control task - motor positioning, LED sequencing, or power monitoring - without communication-induced jitter. Live Update dual-partition Flash enables field firmware updates over the network with fail-safe rollback, a requirement for deployed industrial equipment. Note that the -I temperature grade covers -40C to +85C; underhood automotive positions need the -E/PT extended variant and a separate AEC-Q100 qualification review with Microchip.
Recommended
Functionally Safe Embedded Control
Microchip positions the dsPIC33CK family, including the DSPIC33CK256MP205, for functional-safety (FuSa) development: the 24 KB SRAM includes Memory Built-In Self-Test (MBIST), program Flash carries ECC, and the dual-partition Flash architecture supports safe in-field updates with integrity checking. DigiKey lists this device under its Functional Safety (FuSa) microcontroller category. Typical uses are industrial drives, elevators, and power systems where a safety case must demonstrate memory integrity and deterministic behavior; the 100 MHz single core with fixed interrupt latency simplifies timing analysis versus multi-core parts. The three on-chip comparators additionally provide an independent hardware safety path - overcurrent trips that operate even if firmware stalls.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK256MP205-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK256MP205-E/PT | DSPIC33CK128MP205-E/PT |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Core Speed | 100 MHz (100 MIPS) | 100 MHz (100 MIPS) | 100 MHz (100 MIPS) |
| Program Flash | 256 KB (ECC, dual-partition) | 256 KB (ECC, dual-partition) | 128 KB |
| Data SRAM | 24 KB (MBIST) | 24 KB (MBIST) | 24 KB (MBIST) |
| Operating Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Temperature Range | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) |
| Op-Amps / Comparators | 3 / 3 | 3 / 3 | 3 / 3 |
| CAN FD / HR-PWM | Yes / Yes | Yes / Yes | Yes / Yes |
Key Differentiators
- Extended-temperature headroom option on the same footprint (vs DSPIC33CK256MP205-E/PT)
- Double the program Flash at the same pin count (vs DSPIC33CK128MP205-E/PT)
- Integrated analog front end reduces external BOM (vs DSPIC33CK128MP205-E/PT)
Design Notes
The DSPIC33CK256MP205-I/PT operates from a single 3.0V-3.6V rail and integrates an internal 1.8V regulator whose output appears on the VCAP pin. Fit a low-ESR ceramic capacitor (per datasheet recommendation) directly at VCAP with a short return to VSS; omitting it or using the wrong value is the most common cause of startup failure on this family. Provide 100 nF decoupling at each VDD/AVDD pair plus local bulk storage, and filter AVDD separately (ferrite plus 1 uF) so op-amp and ADC accuracy are not degraded by digital supply ripple.
In digital-power layouts, route PWMxH/PWMxL outputs away from ANx analog inputs and the VCAP trace to prevent switching-edge coupling into current-sense channels. Star-ground the analog domain at AVSS and keep high-current gate-drive loops small. For programming, expose a standard ICSP header; note from Microchip documentation that any PGECx/PGEDx pair may be used but the pair must match (PGEC2 with PGED2) - mismatched pairs are a recurring bring-up failure. Reserve room for the 7x7 mm TQFP thermal relief; the exposed thermal demands are modest at 100 MIPS but not zero.
Three pitfalls recur on the dsPIC33CK platform. First, ordering the tape-and-reel suffix (T) by mistake when tray is needed - DSPIC33CK256MP205T-I/PT is a separate MPN. Second, assuming -I grade covers automotive underhood: -40C to +85C does not; select -E/PT (+125C) or verify AEC-Q100 status for automotive programs. Third, designing with Live Update dual-partition Flash requires reserving half the 256 KB for each partition in the simplest scheme - budget Flash accordingly before choosing the 256 KB part over the 128 KB variant.
Compliance Information
RoHS compliant and lead-free per distributor listings (DigiKey, Mouser, PCBElectronics). Industrial-grade commercial part; not AEC-Q100 qualified. REACH, halogen-free, and conflict-minerals status not stated in provided data.
