DSPIC33CK256MP506-I/MR - 100MHz 16-bit DSC 256KB Flash | Microchip
MPN: DSPIC33CK256MP506-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.9 | $29.00 |
| 100 | $2.65 | $265.00 |
| 500 | $2.48 | $1,240.00 |
| 1,000 | $2.3 | $2,300.00 |
DSPIC33CK256MP506-I/MR Overview
A digital signal controller combines the compute architecture of a microcontroller with the math acceleration of a digital signal processor (DSP). Within the power-management hierarchy, the dsPIC33CK family sits at the top of Microchip's 16-bit DSC line-up, positioning a single-core 100 MIPS engine (dsPIC33CK) below the dual-core dsPIC33CH family, and above the dsPIC33EP generation. DSCs are the standard choice for closed-loop, cycle-by-cycle control loops in switch-mode power conversion and motor drive systems.
Key differentiating features include a single-cycle 16x16 MAC DSP engine, 250 MSPS 12-bit ADC with up to 4.1 Msps throughput, three analog comparators, three internal op amps, and 45.5 ps resolution PWM peripherals for precision digital power topologies such as LLC, totem-pole PFC and phase-shifted full bridge.
The device also integrates a PTG (Peripheral Trigger Generator), multiple UART, SPI and I2C ports, and CAN Flexible Data-rate (CAN FD) for industrial and automotive-adjacent networking. Euler and flash ECC support, plus hardware loop construction, simplify deterministic control code.
Typical applications include PFC and DC-DC digital power supplies, BLDC/PMSM/ACIM/SR motor control, solar inverters, wireless charging, UPS systems and advanced sensing nodes where 100 MHz single-cycle control-loop execution and CAN FD connectivity are required.
Design consideration: all VDD/VSS pairs must be decoupled with 0.1 uF ceramics placed directly at the pins, and the VCAP pin requires its specified capacitor for internal regulator stability; use one PGECx/PGEDx pair consistently for ICSP programming.
This page synthesizes distributor pricing, drop-in same-footprint alternatives from the dsPIC33CK MP506 family, and practical design notes not found in the manufacturer datasheet, verified against DigiKey, Mouser and LCSC listings as of 2026-09-23.
Drop-in alternatives for DSPIC33CK256MP506-I/MR — 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 DSPIC33CK256MP506-I/MR (same form factor and footprint) — differing in Core, Package, Operating Temperature, PWM, Program Flash.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK256MP506-E/MR
✅ Drop-In✓ In Stock
$4.05 / Unit
View Datasheet →DSPIC33CK128MP506-E/MR
✅ Drop-In✓ In Stock
$4.42 / Unit
View Datasheet →DSPIC33CK128MP506-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.35 / Unit
View Datasheet →DSPIC33CK64MP506-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.58 / Unit
View Datasheet →DSPIC33CK32MP506-I/MR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.1 / Unit
View Datasheet →DSPIC33CK256MP506-I/MR Maximum Ratings & Electrical Characteristics
| Core | 16-bit dsPIC DSC |
| Core Speed | 100 MHz (100 MIPS) |
| Program Memory (Flash) | 256 KB |
| RAM | 24 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Package | 64-QFN (9x9 mm), MR suffix |
| ADC Resolution | 12-bit |
| CAN Interface | CAN FD |
| On-chip Op Amps | 3 |
| Analog Comparators | 3 |
| PWM | High-Resolution PWM (45.5 ps) |
| Operating Temperature | -40C to +85C (I grade) |
| Mounting Type | Surface Mount |
| Communication Interfaces | UART, SPI, I2C, CAN FD |
| Special Peripherals | PTG, DSP engine, 250 MSPS ADC |
| RoHS Status | Compliant |
DSPIC33CK256MP506-I/MR Pin Configuration
| Pin 1 | MCLR — Master clear reset (external reset input, ICSP) |
| Pin 2 | AN0/C1IN1+/RP16 — Analog input 0 / comparator input / remappable IO (verify against datasheet) |
| Pin 3 | AN1/C1IN1-/RP17 — Analog input 1 / comparator input / remappable IO (verify against datasheet) |
| Pin 4 | PGED1/AN2/RP18 — ICSP data 1 / analog input / remappable IO |
| Pin 5 | PGEC1/AN3/RP19 — ICSP clock 1 / analog input / remappable IO |
| Pin 6 | AN4/RP20 — Analog input 4 / remappable IO |
| Pin 7 | VDD — Positive supply (3.0-3.6 V) |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI/RP21 — Crystal input / external clock input / remappable IO |
| Pin 10 | OSC2/CLKO/RP22 — Crystal output / clock output / remappable IO |
| Pin 11 | RP23 — Remappable IO |
| Pin 12 | RP24 — Remappable IO |
| Pin 13 | RP25 — Remappable IO |
| Pin 14 | VSS — Ground reference |
| Pin 15 | VDD — Positive supply |
| Pin 16 | RP26 — Remappable IO |
| Pin 17 | RP27 — Remappable IO |
| Pin 18 | RP28 — Remappable IO |
| Pin 19 | PGED2/RP29 — ICSP data 2 / remappable IO |
| Pin 20 | PGEC2/RP30 — ICSP clock 2 / remappable IO |
| Pin 21 | RP31 — Remappable IO |
| Pin 22 | RP32 — Remappable IO |
| Pin 23 | RP33 — Remappable IO |
| Pin 24 | RP34 — Remappable IO |
| Pin 25 | VSS — Ground reference |
| Pin 26 | VDD — Positive supply |
| Pin 27 | AN5/RP35 — Analog input / remappable IO |
| Pin 28 | AN6/RP36 — Analog input / remappable IO |
| Pin 29 | AN7/RP37 — Analog input / remappable IO |
| Pin 30 | AN8/RP38 — Analog input / remappable IO |
| Pin 31 | AN9/RP39 — Analog input / remappable IO |
| Pin 32 | VSS — Ground reference |
| Pin 33 | AN10/RP40 — Analog input / remappable IO |
| Pin 34 | AN11/RP41 — Analog input / remappable IO |
| Pin 35 | AN12/RP42 — Analog input / remappable IO |
| Pin 36 | AN13/RP43 — Analog input / remappable IO |
| Pin 37 | AN14/RP44 — Analog input / remappable IO |
| Pin 38 | VDD — Positive supply |
| Pin 39 | VSS — Ground reference |
| Pin 40 | AN15/RP45 — Analog input / remappable IO |
| Pin 41 | RP46 — Remappable IO |
| Pin 42 | RP47 — Remappable IO |
| Pin 43 | RP48 — Remappable IO |
| Pin 44 | RP49 — Remappable IO |
| Pin 45 | RP50 — Remappable IO |
| Pin 46 | RP51 — Remappable IO |
| Pin 47 | AVDD — Analog positive supply |
| Pin 48 | AVSS — Analog ground |
| Pin 49 | VREF+/RP52 — ADC positive voltage reference / remappable IO |
| Pin 50 | VREF-/RP53 — ADC negative voltage reference / remappable IO |
| Pin 51 | RP54 — Remappable IO |
| Pin 52 | RP55 — Remappable IO |
| Pin 53 | RP56 — Remappable IO |
| Pin 54 | RP57 — Remappable IO |
| Pin 55 | PGED3/RP58 — ICSP data 3 / remappable IO |
| Pin 56 | PGEC3/RP59 — ICSP clock 3 / remappable IO |
| Pin 57 | RP60 — Remappable IO |
| Pin 58 | RP61 — Remappable IO |
| Pin 59 | RP62 — Remappable IO |
| Pin 60 | RP63 — Remappable IO |
| Pin 61 | VCAP — Internal core regulator capacitor (connect specified capacitor to VSS) |
| Pin 62 | RP64 — Remappable IO |
| Pin 63 | RP65 — Remappable IO |
| Pin 64 | RP85/VDD — Remappable IO / positive supply (verify exact muxing against datasheet) |
Typical Applications
DSPIC33CK256MP506-I/MR is suitable for 6 applications: Digital Power Supplies (PFC / DC-DC / LLC), BLDC / PMSM Motor Control (FOC), Solar Inverters and Energy Conversion, Uninterruptible Power Supplies (UPS), Advanced Sensing and Control Nodes, Wireless Charging and Wireless Power Transfer.
Digital Power Supplies (PFC / DC-DC / LLC)
The DSPIC33CK256MP506-I/MR fits switch-mode power conversion because its 100 MHz core executes proportional-integral control loops at switching frequency while the 45.5 ps high-resolution PWM eliminates limit-cycle oscillation in LLC and phase-shifted full-bridge converters. The 12-bit ADC can sample input/output current and voltage every switching cycle, and the PTG (Peripheral Trigger Generator) sequences ADC conversions tied to PWM events without CPU intervention, freeing MIPS for control math. Three hardware comparators provide cycle-by-cycle overcurrent protection with latency far below any software interrupt path. Placed as the sole controller between the power stage and housekeeping circuitry, it replaces analog control chips with a programmable, firmware-upgradeable solution; the trade-off is higher idle power than a fixed-frequency analog controller and mandatory firmware validation for safety-critical rails.
Recommended
BLDC / PMSM Motor Control (FOC)
Field-oriented control of permanent-magnet motors is compute-intensive: Clarke/Park transforms and PI loops must complete within one PWM period. The DSPIC33CK256MP506-I/MR's 100 MHz core with a single-cycle 16x16 MAC DSP engine executes FOC at 20-100 kHz PWM rates with headroom. Per Microchip's family description, the dsPIC33CK family enables BLDC, PMSM, ACIM, SR and stepper control that is more energy efficient, quieter and extends motor life. The three on-chip op amps amplify low-level shunt-current signals directly, reducing BOM cost versus external amplifiers, and the 12-bit ADC simultaneously samples phase currents at the PWM center for torque-ripple-free control. Designers should budget the three PWM channels for a three-phase inverter gate-drive interface, with dead-time managed in hardware.
Recommended
Solar Inverters and Energy Conversion
Grid-tied and off-grid solar converters require simultaneous MPPT, inverter modulation, grid synchronization and safety monitoring. The DSPIC33CK256MP506-I/MR's 100 MIPS core handles MPPT algorithms while dedicated PWM hardware generates the high-resolution modulated gate signals needed to keep THD low at high switching frequencies. The 12-bit ADC multiplexes across DC-link voltage, panel current, grid voltage and temperature channels each control cycle; three comparators implement fast hardware trip zones for grid faults and overcurrent. CAN FD connectivity supports inverter-to-BMS or string-level networking. Unlike dual-core alternatives, the entire budget is available to one deterministic control loop, simplifying certification analysis; the trade-off is that HMI/display work must be lightweight or delegated to an external MCU.
Recommended
Uninterruptible Power Supplies (UPS)
UPS systems combine battery charging, DC-AC inversion and transfer-switch logic in one control domain. The DSPIC33CK256MP506-I/MR covers this with its 100 MHz core running the inverter control loop, high-resolution PWM shaping the output sinusoid to minimize output-filter stress, and the 12-bit ADC continuously monitoring battery voltage, current and AC line zero crossings. Hardware comparators guard the battery and inverter stages against overcurrent, while multiple UART/SPI/I2C ports report status to front-panel and network supervisory circuits. CAN FD enables rack-level UPS communication in data-center deployments. Because the I temperature grade spans -40C to +85C, it suits industrial cabinet installations; designers must ensure the firmware watchdog and brown-out reset are enabled for ride-through robustness.
Recommended
Advanced Sensing and Control Nodes
Industrial sensing nodes benefit from the DSC's ability to run signal-processing on raw sensor data locally. The DSPIC33CK256MP506-I/MR's DSP engine applies FIR/IIR filtering or FFT analysis to ADC streams sampled at up to hundreds of ksps, while the PTG schedules autonomous acquisition sequences with microsecond determinism. On-chip op amps condition small analog signals, and the CAN FD interface streams processed results over robust industrial networks. Typical deployments include vibration monitoring on rotating machinery, precision flow or pressure measurement where filtering must be cycle-accurate, and condition-based maintenance gateways. Using the 256 KB flash, calibration tables and DSP coefficient sets coexist with application code; the 24 KB RAM accommodates multiple filter buffers without external memory.
Recommended
Wireless Charging and Wireless Power Transfer
Wireless power transmitters require precise control of a resonant half- or full-bridge at 100 kHz-2 MHz operating points with fast foreign-object and over-temperature protection. The DSPIC33CK256MP506-I/MR's 45.5 ps PWM resolution allows fine frequency and phase tuning to track resonance and maximize coil-to-coil efficiency as coupling varies, while its 100 MHz core implements QI/EPP-class communication demodulation from the power signal. The 12-bit ADC samples coil current and rectifier voltage each cycle for closed-loop power regulation, and hardware comparators implement sub-microsecond fault trips demanded by safety standards. Placing this DSC as the transmitter controller reduces solution size by integrating sensing amplification on-chip; high-frequency designs must verify PWM dead-time resolution against the target resonant frequency.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK256MP506-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK256MP506-E/MR | DSPIC33CK128MP506-E/MR | DSPIC33CK128MP506-I/MR | DSPIC33CK64MP506-I/MR |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 100 MHz (100 MIPS) | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Flash Memory | 256 KB | 256 KB | 128 KB | 128 KB | 64 KB |
| RAM | 24 KB | 24 KB | 24 KB | 24 KB | 24 KB |
| Operating Temperature | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +85C (I grade) |
| CAN FD | Yes | Yes | Yes | Yes | Yes |
| On-chip Op Amps / Comparators | 3 / 3 | 3 / 3 | 3 / 3 | 3 / 3 | 3 / 3 |
Key Differentiators
- Full 100 MHz single-core performance for control loops (vs DSPIC33CH256MP506T-I/PT)
- Extended-temperature drop-in variant available (vs DSPIC33CK256MP506-E/MR)
- Flash-size scalability on one footprint (vs DSPIC33CK128MP506-I/MR)
Design Notes
The DSPIC33CK256MP506-I/MR requires 3.0-3.6 V on every VDD pin plus a separate AVDD rail for the analog domain. Fit a 0.1 uF ceramic directly at each VDD/VSS pair and at least 4.7 uF bulk capacitance near the device. The VCAP pin needs its datasheet-specified capacitor (about 10 uF) to ground for the internal 1.8 V core LDO - omitting it or using the wrong value causes unstable operation or failure to boot. Route AVDD through an RC or ferrite filter from VDD to keep ADC noise low.
For digital power and motor-control layouts, keep the PWM gate-drive traces short and pair each PGECx/PGEDx ICSP pair consistently (PGEC2 must pair with PGED2, etc.) and bring the chosen pair to a programming header. Place analog sense inputs (ANx pins) away from PWM switching nodes on the copper, and use the QFN center exposed pad as a solid VSS connection with multiple thermal vias to the ground plane to reduce ground bounce during simultaneous PWM switching.
Common issues: (1) forgetting that this is a 3.3 V-only device - 5 V logic connections must respect pin 5 V-tolerant ratings in the datasheet; (2) using mismatched PGEC/PGED pairs during ICSP, which fails programming silently; (3) disabling the watchdog while debugging then shipping firmware without re-enabling it; (4) assuming dual-core dsPIC33CH code ports directly - the dsPIC33CK is single core, so slave-core routines must be merged. Verify flash size headroom before switching to 128/64 KB drop-in variants.
With 45.5 ps PWM edge resolution, firmware-configured dead-time and slew can be tuned to reduce EMI, but very fast edges also increase radiated emissions. Use the PWM slew-rate features conservatively, add small gate resistors on driver outputs, and keep the high-resolution PWM clock configuration within datasheet limits. CISPR-style pre-compliance testing is recommended early because PWM-edge tuning interacts with PCB parasitics in ways simulation may not predict.
Compliance Information
RoHS compliant per standard Microchip MR package suffix for the dsPIC33CK family; REACH/halogen declarations available from Microchip product page environmental documents.
