DSPIC33CK256MP202T-I/SS - 100MHz 16-bit DSC, 256KB | Microchip
MPN: DSPIC33CK256MP202T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.45 | $44.50 |
| 100 | $3.95 | $395.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.2 | $3,200.00 |
DSPIC33CK256MP202T-I/SS Overview
A digital signal controller combines the computational core of a microcontroller with DSP-class arithmetic capability in a single chip. In the power-management hierarchy, a DSC sits above general-purpose MCUs for real-time control loops: its deterministic interrupt latency and multiply-accumulate (MAC) throughput let firmware close current and voltage loops at hundreds of kilohertz, which a standard 8-bit or low-end 16-bit MCU cannot reliably do. The dsPIC33CK family is Microchip's flagship DSC line for digital power and motor control.
Key features of the DSPIC33CK256MP202T-I/SS include the 100 MHz dsPIC33C core with DSP and fixed-point instructions, 256 KB of ECC-protected dual-panel Flash allowing live firmware updates, 24 KB of RAM, integrated operational amplifiers, 12-bit ADCs rated up to 3.5 Msps, high-resolution PWM with edge resolutions down to the 2 ns class, and CAN Flexible Data (CAN FD) support. Dual-panel Flash plus ECC makes the part suited to functional-safety oriented designs, consistent with its DigiKey listing as a Functional Safety (FuSa) microcontroller.
Architecturally, the device uses a modified Harvard bus with a 24-bit instruction word, DMA channels that offload the CPU for ADC-to-RAM transfers, and hardware cycle-limiting to guarantee loop timing. The on-chip op amps can be routed internally to the ADC, shrinking the analog front end of current-shunt sensing circuits.
Typical applications include digital switch-mode power supplies (LLC, totem-pole PFC), PMSM and BLDC motor control, solar micro-inverters, battery chargers, and industrial sensing nodes.
Design consideration: at 100 MHz, supply decoupling and ADC reference layout directly influence conversion accuracy - follow Microchip's analog layout guidance with solid VDD/VSS and AVDD/AVSS pairs and short shunt connections to the integrated op-amp inputs.
This page synthesizes distributor pricing tiers, drop-in alternatives, pinout guidance, and application-level design notes not found together in the manufacturer datasheet. Pricing references are as of 2026-09-22.
Drop-in alternatives for DSPIC33CK256MP202T-I/SS — 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 DSPIC33CK256MP202T-I/SS (same form factor and footprint) — differing in Package, Core, Program Memory (Flash), Operating Temperature, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK256MP202-I/SS
✅ Drop-In✓ In Stock
$3.15 / Unit
View Datasheet →DSPIC33CK256MP202T-E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK256MP202T-H/SS
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK128MP202-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK64MP202-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.9 / Unit
View Datasheet →DSPIC33CK32MP202-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK256MP202T-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33C DSC core |
| Maximum CPU Speed | 100 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) with ECC |
| SRAM | 24 KB |
| Supply Voltage | 3.3 V (nominal) |
| ADC Resolution | 12-bit |
| ADC Sampling Rate | up to 3.5 Msps |
| Integrated Op Amps | Yes (on-chip op amps) |
| PWM | High-speed PWM, 2 ns class resolution |
| CAN Interface | CAN FD |
| DMA Channels | 4 |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 28-SSOP (5.30 mm width) |
| Mounting Type | Surface Mount |
| Series | dsPIC33CK (Functional Safety / FuSa capable) |
| RoHS Status | Compliant |
DSPIC33CK256MP202T-I/SS 28-ssop (5.30 mm width) Pin Configuration Guide
Pin configuration for DSPIC33CK256MP202T-I/SS (28-ssop (5.30 mm width) 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 DSPIC33CK256MP202T-I/SS.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK256MP202T-I/SS is suitable for 6 applications: Digital Switch-Mode Power Supplies, BLDC and PMSM Motor Control, Solar Micro-Inverters and chargers, Battery Management Systems, Industrial Sensing and Control Nodes, Wireless-Connected IoT Devices.
Digital Switch-Mode Power Supplies
The DSPIC33CK256MP202T-I/SS fits LLC resonant converters, totem-pole PFC stages, and high-density DC-DC modules where loop bandwidth and switching resolution decide efficiency. Its 100 MHz DSP core executes control-law math every switching cycle, while the 12-bit ADC sampling up to 3.5 Msps captures per-cycle current via the internal op amps, eliminating external amplifiers. The high-resolution PWM with roughly 2 ns edge resolution permits very small duty-cycle corrections at hundreds of kilohertz switching frequency, improving transient response and reducing output ripple. Dual-panel ECC Flash enables live firmware updates in deployed power hardware. Place the controller with short shunt traces to the op-amp inputs and follow Microchip digital power reference designs to reproduce their verified loop tuning and dead-time schemes.
Recommended
BLDC and PMSM Motor Control
Sensorless and sensored PMSM/BLDC drives benefit directly from this DSC. The dsPIC33C core runs field-oriented control (FOC) with single-cycle MAC instructions at 100 MHz, leaving ample margin for speed loops on top of the fast current loop. The 3.5 Msps 12-bit ADC, driven by the on-chip op amps from low-ohm shunts, synchronizes sampling to the center of the PWM window for clean phase-current data, and the high-resolution PWM minimizes dead-time distortion at low modulation indices. CAN FD connectivity integrates the drive into industrial networks without an external transceiver controller. Microchip's motor-control libraries target this exact family; budget Flash headroom from the 256 KB program memory for the FOC framework plus safety diagnostics, and route PWM outputs away from the analog front end on the PCB.
Recommended
Solar Micro-Inverters and chargers
Micro-inverter and MPPT battery-charger designs need one controller that simultaneously performs maximum-power-point tracking, grid-synchronization, and protection. The DSPIC33CK256MP202T-I/SS covers all three: its DSP throughput handles MPPT and phase-locked-loop computations while the ADC channels sample panel voltage/current and grid waveforms; the high-resolution PWM generates the interleaved converter gating with fine phase control that interleaving demands; and 256 KB dual-panel Flash stores firmware that can be safely updated in the field - critical for 20-plus-year rooftop products. The industrial -40C to +85C grade suits outdoor enclosure ambients. Layout consideration: keep the CAN FD or communication interface isolated from the power stage and dedicate solid analog ground under the ADC reference path.
Recommended
Battery Management Systems
In BMS slave or master boards, the DSPIC33CK256MP202T-I/SS executes state-of-charge estimation algorithms in real time using its DSP core, samples cell voltages and currents through the 12-bit 3.5 Msps ADC, and communicates over CAN FD - the de facto vehicle and stationary-storage bus - using the integrated controller. The on-chip op amps condition shunt-based current measurement without an external amplifier, reducing BOM cost. Dual-panel ECC Flash supports redundant-image firmware updates, an important functional-safety attribute given the family's FuSa positioning. Use the CRC and watchdog peripherals to supervise the control loop, and allocate the 24 KB RAM carefully since protection-state machines plus estimation filters compete for SRAM in single-chip BMS designs.
Recommended
Industrial Sensing and Control Nodes
Factory sensors, actuators, and smart nodes use the DSPIC33CK256MP202T-I/SS where analog acquisition and protocol interfacing must coexist. The 12-bit ADC with multiple channels reads transducer outputs, the internal op amps amplify small sensor signals, and the 100 MHz core runs digital filtering (IIR/FIR) in firmware without a separate DSP. Multiple UART, SPI, and I2C ports, plus DMA offload, let the CPU stay responsive while streaming data. CAN FD links the node to industrial networks with 64-byte payloads at higher rates than classical CAN. Its FuSa-capable family listing and ECC Flash make it credible for safety-related monitoring. For noisy industrial environments, use external RC filtering ahead of the analog inputs and route the communication buses differentially or with isolation.
Recommended
Wireless-Connected IoT Devices
When an IoT edge device must drive power electronics - smart lighting, connected chargers, motorized locks, small appliances - the DSPIC33CK256MP202T-I/SS supplies the deterministic control core while a companion radio module handles connectivity. The 3.3 V supply matches typical wireless-module rails directly, simplifying the power tree, and the rich peripheral set (PWM, ADC, UART/SPI/I2C) interfaces to both the actuator and the module. With 256 KB of Flash there is room for application code, a communication stack, and over-the-air update staging in the second Flash panel. Power-sensitive designs should exploit low-power sleep states between control cycles. Keep the RF module's ground return separate from the PWM/power-stage ground to avoid injecting switching noise into the radio sensitivity path.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK256MP202T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK256MP202-I/SS | DSPIC33CK256MP202T-E/SS | DSPIC33CK128MP202-I/SS | DSPIC33CK64MP202-I/SS |
|---|---|---|---|---|---|
| Package | 28-SSOP (5.30 mm) | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Flash Memory | 256 KB (ECC) | 256 KB (ECC) | 256 KB (ECC) | 128 KB | 64 KB |
| SRAM | 24 KB | 24 KB | 24 KB | 16 KB | 8 KB |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +150C (E) | -40C to +85C (I) | -40C to +85C (I) |
| Best Fit Use Case | Digital power, motor control, CAN FD nodes | Prototyping / low-volume builds | High-ambient power electronics | Cost-reduced firmware under 128 KB | Entry-level control loops |
Key Differentiators
- Maximum program memory in the 28-SSOP family (vs DSPIC33CK128MP202-I/SS)
- Industrial temperature grade at standard cost (vs DSPIC33CK256MP202T-E/SS)
- Tape-and-reel supply for automated assembly (vs DSPIC33CK256MP202-I/SS)
Design Notes
The DSPIC33CK256MP202T-I/SS runs its core at 3.3 V nominal with separate VDD/VSS and AVDD/AVSS pin pairs on the 28-SSOP. Decouple each pair with 100 nF ceramics placed within 2-3 mm of the pins plus one bulk 4.7-10 uF per supply. Generate AVDD from VDD through an RC or ferrite filter to keep PWM and CAN switching noise out of the ADC reference; ADC accuracy at 12 bits degrades measurably with shared noisy supplies.
Route current-shunt sense traces as tightly coupled pairs directly to the integrated op-amp inputs, and use Kelvin connections at the shunt itself. Synchronize ADC sampling to the PWM window center using the peripheral trigger so switching transients are not sampled. Keep the CAN FD and PWM routing away from the analog front end, and provide a solid, unbroken ground plane under the controller.
Verify firmware size against the Flash variant you select: the DSPIC33CK128MP202 and DSPIC33CK64MP202 drop-ins have only 128 KB and 64 KB respectively. Do not exceed the -I grade's +85C ambient when the -E variant (-40C to +150C) is required for high-ambient power stages. Finally, respect MCLR-based ICSP pin usage in your connector header so in-circuit programming remains possible after assembly.
Compliance Information
RoHS compliant and lead-free per DigiKey/Mouser listings. AEC-Q100 declaration not published for this standard variant; the dsPIC33CK family offers FuSa-capable positioning per Microchip. Verify REACH and halogen-free status via Microchip official compliance documentation.
