DSPIC33CK256MP202-I/SS - 100MHz 16-bit DSC 256KB Flash | Microchip
MPN: DSPIC33CK256MP202-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.9 | $39.00 |
| 100 | $3.6 | $360.00 |
| 500 | $3.4 | $1,700.00 |
| 1,000 | $3.15 | $3,150.00 |
DSPIC33CK256MP202-I/SS Overview
A digital signal controller combines the computational throughput of a digital signal processor with the deterministic control peripherals of a microcontroller. Within the power-management hierarchy, the dsPIC33CK family sits above general-purpose MCUs and below multi-core DSCs (dsPIC33CH), targeting real-time closed-loop control where cycle-deterministic interrupt latency matters more than raw interface bandwidth.
Key features include the dsPIC33CK DSC core running DC to 100 MIPS (modified Harvard architecture), 250 ps PWM resolution via high-resolution PWM modules with deadlock protection, dual 12-bit 3.5 Msps ADCs with simultaneous sampling, and integrated operational amplifiers that reduce external BOM count in current-sense chains. Dual-partition Flash enables Live Update firmware upgrade while the application continues running, and on-die ECC protects program memory in electrically noisy environments.
Technically, the device integrates CAN Flexible Data (CAN FD) for automotive and industrial fieldbus nodes, multiple UART/SPI/I2C peripherals with Peripheral Pin Select (PPS) routing flexibility, and hardware DSP multiply-accumulate instructions suited to Field-Oriented Control (FOC) of brushless and PMSM motors. The 250 ps effective PWM resolution allows switching frequencies above 100 kHz with fine duty-cycle granularity for digital power supplies.
Typical applications include digital power supplies and AC-DC converters, PMSM/BLDC motor Field-Oriented Control, advanced sensor fusion and control nodes, and CAN FD-enabled industrial or automotive subsystems.
Design consideration: all Flash programming and debugging uses any PGECx/PGEDx pair (ICSP), but the pair must be matched - if PGEC2 drives ICSPCLK, PGED2 must drive ICSPDAT; connect all VDD and VSS pins.
This page synthesizes distributor pricing, drop-in same-family alternatives, pinout data, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33CK256MP202-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 DSPIC33CK256MP202-I/SS (same form factor and footprint) — differing in Data SRAM, Operating Temperature, Package, Core, PWM Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK256MP502-I/SS
✅ Drop-In✓ In Stock
$2.98 / Unit
View Datasheet →DSPIC33CK256MP202-E/SS
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
DSPIC33CK128MP202-I/SS
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
DSPIC33CK64MP202-I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.9 / Unit
View Datasheet →DSPIC33CK32MP202-I/SS
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
DSPIC33CK128MP202-I/2N
✅ Drop-In✓ In Stock
$3.05 / Unit
View Datasheet →DSPIC33CK256MP202-I/SS Maximum Ratings & Electrical Characteristics
| Core | 16-bit dsPIC33CK DSC (Modified Harvard) |
| CPU Speed | DC to 100 MIPS (100 MHz) |
| Program Memory (Flash) | 256 KB, dual partition with ECC and Live Update |
| Data SRAM | 24 KB with Memory Built-In Self-Test (MBIST) |
| Supply Voltage | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 28-pin SSOP |
| Mounting Type | Surface Mount |
| ADC Resolution | 12-bit |
| PWM Resolution | 250 ps (high-resolution PWM) |
| Communication Interfaces | CAN FD, UART, SPI, I2C |
| Integrated Op-Amps | Yes |
| Debug/Programming | ICSP via PGECx/PGEDx pairs |
| Architecture | Single-core, CISC-oriented 16-bit DSC |
| RoHS Status | Unknown (per distributor listing) |
| Typical Applications | Digital power, motor control, advanced sensing |
DSPIC33CK256MP202-I/SS Pin Configuration
| Pin 1 | MCLR — Master clear reset (active low) / programming voltage input |
| Pin 2 | AN0/RA0 — Analog input 0 / port pin |
| Pin 3 | AN1/RA1 — Analog input 1 / port pin |
| Pin 4 | PGD1/AN2/RB1 — In-circuit serial programming data 1 / analog input 2 / port pin |
| Pin 5 | PGC1/AN3/RB0 — In-circuit serial programming clock 1 / analog input 3 / port pin |
| Pin 6 | AN4/C1IN1+ — Analog input 4 / comparator 1 non-inverting input |
| Pin 7 | AN5/C1IN1- — Analog input 5 / comparator 1 inverting input |
| Pin 8 | OSC1/CLKI/AN6 — Oscillator input / external clock input / analog input 6 |
| Pin 9 | OSC2/CLKO/RC15/AN7 — Oscillator output / clock output / analog input 7 |
| Pin 10 | VDD — Positive supply (3.0V to 3.6V) |
| Pin 11 | VSS — Ground reference |
| Pin 12 | AN9/RB4 — Analog input 9 / port pin |
| Pin 13 | AN10/RB3 — Analog input 10 / port pin |
| Pin 14 | AN11/RB5 — Analog input 11 / port pin |
| Pin 15 | VSS — Ground reference |
| Pin 16 | RA2 — Port pin |
| Pin 17 | PGEC2/RB6 — Programming clock 2 / port pin |
| Pin 18 | PGED2/RB7 — Programming data 2 / port pin |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply |
| Pin 21 | AN15/RB9 — Analog input 15 / port pin |
| Pin 22 | AN14/RB8 — Analog input 14 / port pin |
| Pin 23 | AN13/RB14 — Analog input 13 / port pin |
| Pin 24 | AN12/RB13 — Analog input 12 / port pin |
| Pin 25 | RB12 — Port pin |
| Pin 26 | RB11 — Port pin |
| Pin 27 | RB10 — Port pin |
| Pin 28 | VDD — Positive supply |
Typical Applications
DSPIC33CK256MP202-I/SS is suitable for 6 applications: Digital Power Supplies (AC-DC / DC-DC), PMSM / BLDC Motor Field-Oriented Control, CAN FD Industrial and Automotive Nodes, Advanced Sensing and Control Systems, USB/UART-Connected Embedded Control with Live Update, High-Frequency Inverter and Welding Power Stages.
Digital Power Supplies (AC-DC / DC-DC)
The DSPIC33CK256MP202-I/SS fits digital power conversion because its 100 MIPS core closes voltage and current loops with cycle-deterministic latency, while 250 ps high-resolution PWM delivers the duty-cycle granularity needed for switching frequencies above 100 kHz without limit-cycle oscillation. In an AC-DC or LLC converter, the dual 12-bit ADCs sample output voltage and shunt current in the same instant, and the integrated op-amps amplify current-sense signals internally, removing external amplifier stages. Placed as the PWM controller between the feedback divider and the power-stage gate drivers, it replaces analog compensation networks with firmware, enabling adaptive mode switching and digital soft-start. The trade-off versus a dedicated analog PWM IC is firmware development effort and the need for careful PCB grounding of the ADC reference.
Recommended
PMSM / BLDC Motor Field-Oriented Control
Field-Oriented Control demands fast, deterministic math plus simultaneous current sampling, and the DSPIC33CK256MP202-I/SS provides both: the 100 MIPS core with hardware DSP multiply-accumulate executes Clarke/Park transforms and PI loops well inside a 20 kHz PWM period, and the two 12-bit ADCs trigger simultaneously to capture phase currents at the PWM center for ripple-free readings. Integrated op-amps condition low-side shunt voltages on-chip, and the 250 ps PWM resolution suppresses audible dead-time distortion in the inverter stage. The controller outputs six complementary PWM channels with hardware dead-time insertion to drive a three-phase inverter directly. CAN FD lets the drive report torque, speed, and fault status on industrial networks. Versus sensorless trapezoidal control on a cheaper MCU, FOC on this DSC yields higher efficiency and lower torque ripple.
Recommended
CAN FD Industrial and Automotive Nodes
The integrated CAN Flexible Data (CAN FD) peripheral makes the DSPIC33CK256MP202-I/SS a strong node controller for industrial fieldbus and body-domain automotive networks, supporting payload up to 64 bytes and bit rates beyond classical CAN. A typical node uses the 100 MIPS core to run local control loops (motor, pump, or actuator), while the CAN FD block, paired with an external transceiver, exchanges diagnostics and commands on the bus. Dual-partition Flash with Live Update allows firmware refresh over CAN while the node keeps running - critical for deployed equipment that cannot tolerate downtime. ECC on program memory protects against bit-flips in electrically noisy 12V/24V environments. The -40C to +85C I-grade suits under-hood-adjacent and factory-floor enclosures; the -E grade variant extends this to +125C.
Recommended
Advanced Sensing and Control Systems
Sensor front ends benefit from the DSPIC33CK256MP202-I/SS combination of integrated op-amps, dual 12-bit ADCs with simultaneous sampling, and 100 MIPS DSP headroom for filtering. A typical design routes sensor outputs (pressure, current, thermistor bridges) through the on-chip op-amps for gain, samples multiple channels coherently, and applies fixed-point IIR/FIR filtering in software before transmitting results over UART, SPI, or CAN FD. The 24 KB SRAM with built-in self-test (MBIST) supports moderate buffering of waveform captures for diagnostics. Peripheral Pin Select lets you remap serial pins to route around existing PCB constraints, simplifying layout. Compared with a separate PGA plus generic MCU, the single-chip approach reduces BOM count, board area, and inter-chip analog noise pickup, at the cost of firmware-based calibration routines.
Recommended
USB/UART-Connected Embedded Control with Live Update
Products that require field firmware updates without downtime exploit the DSPIC33CK256MP202-I/SS dual-partition Flash with Live Update: the active partition runs the application while the loader writes the standby partition, then a reset swaps banks with near-instant switchover. A typical architecture pairs the DSC with a USB-to-UART bridge or a UART-connected radio module, so a service tool or gateway can push signed images over the existing communication link. ECC on program memory plus MBIST on SRAM provides the integrity monitoring expected in unattended equipment. With 256 KB of Flash, both partitions retain full application images plus a bootloader, which smaller-Flash siblings (64 KB/32 KB) cannot comfortably hold. This application suits smart chargers, HVAC controllers, and networked industrial actuators with long service lives.
Recommended
High-Frequency Inverter and Welding Power Stages
High-frequency power conversion - induction heating, welding supplies, resonant converters - needs PWM engines that stay precise at small duty cycles and switching speeds, which is exactly where the DSPIC33CK256MP202-I/SS 250 ps PWM resolution proves its value: at 500 kHz switching, one 100 MIPS instruction equals 10 ns, yet the high-resolution logic interpolates edges to sub-ns steps, keeping phase relationships in phase-shifted full-bridge and LLC topologies stable. Fast comparators on-chip support cycle-by-cycle current limiting, complementing the ADC-based average-mode loop. The 100 MIPS core handles resonant-tank frequency tracking algorithms in real time. Design care is required for EMI: keep the DSC ground away from the power ground plane and use the multiple VSS pins properly. The I-grade temperature range covers typical inverter-enclosure ambient conditions.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK256MP202-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK256MP502-I/SS | DSPIC33CK256MP202-E/SS | DSPIC33CK128MP202-I/SS | DSPIC33CK64MP202-I/SS | DSPIC33CK32MP202-I/SS |
|---|---|---|---|---|---|---|
| Package | 28-pin SSOP | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 100 MIPS | 100 MIPS | 100 MIPS | 100 MIPS | 100 MIPS | 100 MIPS |
| Program Flash | 256 KB | 256 KB | 256 KB | 128 KB | 64 KB | 32 KB |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C |
| Supply Voltage | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V |
| CAN FD | Yes | Yes | Yes | Yes | Yes | Yes |
| PWM Resolution | 250 ps | 250 ps | 250 ps | 250 ps | 250 ps | 250 ps |
Key Differentiators
- Maximum Flash in the 28-SSOP family branch with Live Update (vs DSPIC33CK128MP202-I/SS)
- Standard temperature grade for cost-sensitive builds (vs DSPIC33CK256MP202-E/SS)
- More integrated op-amp/ADC instances (vs DSPIC33CK256MP502-I/SS)
Design Notes
ICSP programming pin pairing is a frequent bring-up failure: the DSPIC33CK256MP202 exposes multiple PGECx/PGEDx pairs, and ICSPCLK/ICSPDAT must come from the SAME pair - mixing PGEC2 with PGED1 halts programming. Additionally, all VDD and VSS pins must be connected even if your layout only uses a subset of I/O, or the device may power up erratically. Route the chosen programming pair to a 5-pin header at PCB design time; retrofitting ICSP access to a finished board is painful.
The 28-pin SSOP has no exposed pad, so thermal relief is limited - at 100 MIPS the core draws several tens of mA, so keep ambient within the -40C to +85C rating with margin in sealed enclosures; if the design runs hot, qualify the DSPIC33CK256MP202-E/SS grade (+125C) which drops into the same footprint. Decouple every VDD pin with 100 nF close to the pin plus one bulk 10 uF per supply domain, and keep the VDD/VSS pairs on a tight local loop to reduce switching noise coupling into the ADC reference.
Use Peripheral Pin Select (PPS) to route PWM and serial peripherals away from the analog pins (AN0-AN15) used by the dual 12-bit ADCs. Simultaneous sampling of phase currents must occur at the PWM period midpoint - configure the ADC trigger from the PWM module rather than software polling to avoid shot-to-shot jitter that shows up as current-loop ripple. For CAN FD nodes, keep the transceiver within a few cm of the CAN pins and terminate the crystal/OSC traces short and guarded.
Compliance Information
Distributor listing (onlinecomponents.com) reports 'RoHS Unknown' for this ordering code. Verify against Microchip environmental data or request a certificate of conformity before compliance-critical builds.
