DSPIC33CK256MP505T-I/M4 - 16-bit 100MHz DSC 256KB Flash | Microchip
MPN: DSPIC33CK256MP505T-I/M4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.21 | $2.21 |
| 10 | $2.05 | $20.50 |
| 100 | $1.9 | $190.00 |
| 500 | $1.8 | $900.00 |
| 1,000 | $1.7 | $1,700.00 |
DSPIC33CK256MP505T-I/M4 Overview
A digital signal controller combines the computational throughput of a digital signal processor with the peripheral integration and deterministic control of a microcontroller, sitting in the system hierarchy between a standard MCU and a dedicated DSP. The dsPIC33CK family extends this concept with a dual-issue, 16-bit pipelined core executing up to 100 MIPS, making it a power-management-grade processor for real-time control loops.
Key differentiating features include the high-resolution PWM (HRPWM) peripherals for sub-nanosecond pulse-width resolution in switching power converters, three integrated operational amplifiers and three comparators that offload analog signal conditioning from external components, a Programmable Gain Amplifier for current sensing, and CAN Flexible Data-rate (CAN FD) networking for modern industrial and automotive buses. The device is also positioned for Functional Safety (FuSa) development per DigiKey categorization.
Architecturally, the dsPIC33CK core uses a modified Harvard bus structure with DSP multiply-accumulate instructions, enabling single-cycle MAC operations critical for field-oriented control (FOC) of motors and digital power compensation loops. The PTG (Pulse Train Generator) peripheral automates simple waveform sequencing without CPU intervention.
Typical applications include digital power supplies (LLC, totem-pole PFC), brushless DC and PMSM motor control, high-intensity LED drivers, and industrial sensing and control nodes requiring CAN FD connectivity.
When designing, budget the 24 KB RAM carefully - FOC control loops with fast interrupt handlers can consume stack quickly, and Flash programming erase/rewrite cycles should follow the datasheet endurance guidance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33CK256MP505T-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 DSPIC33CK256MP505T-I/M4 (same form factor and footprint) — differing in Package, Core Architecture, Program Memory (Flash), ADC, CAN Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CH256MP505T-I/M4
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CH512MP205T-I/M4
✅ Drop-In✓ In Stock
$5.07 / Unit
View Datasheet →DSPIC33CH128MP505-E/M4
✅ Drop-In✓ In Stock
$4.5 / Unit
View Datasheet →DSPIC33CK256MP505T-H/M4
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK256MP505T-I/M4 Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC DSC core |
| Maximum Clock Frequency | 100 MHz |
| Program Memory Size | 256 KB (256K x 8) Flash |
| RAM Size | 24 KB |
| CAN Interface | CAN FD |
| Integrated Op Amps | 3 |
| Integrated Comparators | 3 |
| Special Peripherals | PTG, High-Resolution PWM |
| Package | 48-UQFN (6x6 mm) |
| Mounting Type | Surface Mount |
| Pin Count | 48 |
| Temperature Grade | I (-40C to +85C) |
| Product Family | dsPIC33CK |
| Functional Safety Support | Yes (FuSa category per DigiKey) |
| Core Type | Digital Signal Processor (DSP) / DSC |
| Technology | CMOS |
| RoHS Status | unknown |
DSPIC33CK256MP505T-I/M4 48-uqfn (6x6 mm) Pin Configuration Guide
Pin configuration for DSPIC33CK256MP505T-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 DSPIC33CK256MP505T-I/M4.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK256MP505T-I/M4 is suitable for 6 applications: Digital Power Supplies (LLC, Totem-Pole PFC), BLDC / PMSM Motor Control, Industrial CAN FD Networking Nodes, High-Intensity LED Lighting Drivers, Advanced Sensing and Control Systems, Functional Safety (FuSa) Control Platforms.
Digital Power Supplies (LLC, Totem-Pole PFC)
The DSPIC33CK256MP505T-I/M4 fits digital power conversion because its high-resolution PWM provides fine duty-cycle resolution required by LLC and totem-pole PFC topologies operating at hundreds of kHz. The 100 MHz core executes voltage and current compensation loops with single-cycle DSP MAC instructions, keeping loop latency low. The three on-chip op amps amplify current-shunt feedback directly, and the CAN FD interface enables digital telemetry with a system host. Place the controller between the feedback dividers and gate drivers, using the PWM modules for complementary outputs with programmable dead time. The trade-off versus a fixed-function controller is software complexity, offset by full parameter configurability.
Recommended
BLDC / PMSM Motor Control
For brushless DC and PMSM drives, the DSPIC33CK256MP505T-I/M4 offers field-oriented control capability on a single chip. The 100 MHz dsPIC33CK core runs the FOC current loop inside fast ISRs using hardware DSP multiply-accumulate, while high-resolution PWM generates six center-aligned channels with dead-time insertion. The three integrated op amps condition three shunt-current signals, and three comparators support overcurrent trip without CPU intervention. Microchip positions the dsPIC33CK family explicitly for precision motor control systems. RAM of 24 KB accommodates state estimators and startup algorithms. Versus a discrete op-amp plus generic MCU solution, this integration reduces BOM count and analog offset error.
Recommended
Industrial CAN FD Networking Nodes
The integrated CAN FD controller makes the DSPIC33CK256MP505T-I/M4 a strong node processor for industrial networks migrating from classical CAN. CAN FD offers higher data-phase bit rates and larger payloads, handled in hardware so the 100 MHz CPU core remains available for application logic and sensing. Per the Microchip datasheet description, CAN Flexible Data-rate is a headline family feature. Typical usage pairs this DSC with a CAN FD transceiver on the bus side while the op amps and comparators handle local analog sensing. In automation and factory networks, deterministic DSC execution combined with robust FD networking consolidates control and communication in one 48-pin device.
Recommended
High-Intensity LED Lighting Drivers
Digital LED drivers benefit from the DSPIC33CK256MP505T-I/M4 high-resolution PWM, which adjusts switching converter duty cycles with fine resolution to achieve stable, flicker-free LED current. The 100 MHz core runs average-current-mode control loops, and the on-chip comparators implement fast cycle-by-cycle current limiting independent of software. Per Mouser data, this DSC family is designated for digital power designs, and LED drivers are a canonical digital power application. The PTG peripheral can automate dimming pulse trains without CPU load. Compared with a fixed-function LED controller, firmware-based control supports tunable-white color mixing and DALI-like communication over CAN FD in the same 48-pin UQFN footprint.
Recommended
Advanced Sensing and Control Systems
The DSPIC33CK256MP505T-I/M4 serves advanced sensing nodes by combining analog integration with DSP throughput. The three op amps and programmable gain stage condition sensor signals such as pressure bridges or current shunts, while the 100 MHz core applies digital filtering and compensation algorithms with single-cycle MAC operations. Microchip lists advanced sensing and control as a target domain for the dsPIC33CK family. The CAN FD interface streams processed measurements to a supervisory controller with larger payloads than classical CAN. In a typical design, sensor front ends connect directly to the integrated amplifiers, reducing external component count. The 48-pin UQFN 6x6 mm package suits compact DIN-rail and embedded sensor modules.
Recommended
Functional Safety (FuSa) Control Platforms
DigiKey categorizes the DSPIC33CK256MP505T-I/M4 within the dsPIC33CK Functional Safety (FuSa) product group, indicating Microchip supports safety-oriented development for this device. For applications such as industrial drives, power inverters, and safety-monitored control systems, the DSC provides hardware self-check friendly peripherals: comparators for independent overcurrent supervision, windowed watchdog capability, and deterministic interrupt latency from the 100 MHz core. Designers implement diagnostic software layers on the 256 KB Flash with 24 KB RAM providing headroom for safety routines alongside application code. When pursuing safety-critical certification, always use Microchip official FuSa collateral and validate against the current family datasheet and safety manual.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK256MP505T-I/M4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CH256MP505T-I/M4 | DSPIC33CH512MP205T-I/M4 | DSPIC33CH128MP505-E/M4 | DSPIC33CK256MP505T-H/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 |
| Core / Performance | Single-core dsPIC33CK, 100 MHz | Dual-core, 100/100 MIPS | Dual-core, 100/100 MIPS | Dual-core, 100/100 MIPS | Single-core, 64 MHz max |
| Flash Memory | 256 KB | 256 KB | 512 KB | 128 KB | 256 KB |
Key Differentiators
- Single 100 MHz core with lowest software complexity (vs DSPIC33CH256MP505T-I/M4)
- Three integrated op amps reduce BOM (vs DSPIC33CH128MP505-E/M4)
- Full-speed 100 MHz operation (vs DSPIC33CK256MP505T-H/M4)
Design Notes
The 48-UQFN 6x6 mm package has a 0.4 mm or 0.5 mm pitch perimeter; verify the exact lead pitch and exposed pad dimensions in the Microchip datasheet before creating the footprint, and use the free ECAD model from Component Search Engine (symbol, footprint, 3D step) linked to this MPN. Connect the exposed thermal pad to a grounded copper pour with an array of vias to improve heat spreading and signal-return integrity. For assembly, confirm MSL rating and reflow profile against the Microchip packaging specification.
RAM is 24 KB, which is modest relative to the 256 KB Flash. Fast ISRs for FOC control loops, communication buffers, and the compiler software stack can exhaust RAM quickly - map memory usage early in MPLAB X using the memory gauge. Also note the -H suffix variant of this part number runs at a maximum of 64 MHz, not 100 MHz; purchasing the wrong speed grade is a common ordering error. Always verify the full suffix (-I/M4 vs -H/M4) on the purchase order.
Decouple the VDD core and peripheral rails per the Microchip datasheet power-up requirements: place low-ESR ceramic capacitors at each VDD pin pair and follow the recommended external voltage regulator guidance for the dsPIC33CK core supply. The integrated op amps draw additional analog supply current - route AVDD from a quiet supply node or ferrite-filtered branch of the main 3.3V rail, and keep analog ground returns separate from high-current PWM gate-driver returns to prevent offset errors in current-sense amplification.
High-resolution PWM outputs driving gate drivers can inject switching noise into the shared ground of the integrated comparators and op amps, causing false overcurrent trips. Use Kelvin-connected shunt sensing directly to the op-amp input pins, add small RC filters on comparator inputs sized to the datasheet propagation-delay budget, and route PWM traces away from analog feedback lines. The CAN FD bus benefits from proper 120-ohm termination and a short stub to the transceiver.
Compliance Information
Compliance details not stated in the provided web data. Microchip general-purpose MCU families are typically RoHS compliant, but this must be confirmed on the official product page before use in regulated applications.
