DSPIC33CK128MC102T-I/SS - 16-bit DSC, 128KB Flash, 100MHz | Microchip
MPN: DSPIC33CK128MC102T-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.16 | $41.60 |
| 100 | $3.71 | $371.00 |
| 500 | $3.35 | $1,675.00 |
| 1,000 | $3.02 | $3,020.00 |
DSPIC33CK128MC102T-I/SS Overview
A Digital Signal Controller combines the computational throughput of a digital signal processor (barrel shifter, DSP multiply-accumulate instructions, circular buffers) with the integrated peripherals and low power modes of a microcontroller, placing it in the hierarchy: DSC -> digital signal processor -> 16-bit MCU -> embedded processor. This makes the dsPIC33CK family particularly suited to real-time control loops executing at high frequency.
Key features include the single 100 MHz dsPIC33CK core with enhanced on-chip peripherals, on-chip operational amplifiers (OpAmps), a 12-bit high-speed ADC, and high-resolution PWM generators - the peripheral set that the Mouser and DigiKey listings highlight for this exact MPN. Four DMA channels offload data movement for ADC and PWM-heavy applications, and the T suffix indicates tape-and-reel packaging for automated assembly.
Architecturally, the dsPIC33CK core executes DSP instructions at the full 100 MHz clock rate, delivering faster control-loop execution than the earlier dsPIC33EP generation. The integrated op-amps condition low-level current-sense signals before the 12-bit ADC samples them, reducing external component count in motor-control designs.
Typical applications include brushless DC (BLDC) and PMSM motor control, digital power conversion (PFC, LLC), industrial automation, and high-performance general-purpose embedded systems.
When designing, budget the 16 KB RAM carefully for control-law state and ADC buffers, since DMA-based sampling consumes memory bandwidth.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33CK128MC102T-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 DSPIC33CK128MC102T-I/SS (same form factor and footprint) — differing in Operating Temperature, Package, DMA Channels, ADC Resolution, Analog Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK128MC102-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK128MC102T-E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK128MC102T-H/SS
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK64MC102T-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.18 / Unit
View Datasheet →DSPIC33CK128MC103T-I/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CH128MP202-I/SS
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →DSPIC33CK128MC102T-I/SS Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC core |
| Maximum Clock Frequency | 100 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| RAM Size | 16 KB |
| ADC Resolution | 12 bit |
| Integrated Peripherals | OpAmps, 12-bit ADC, PWM |
| DMA Channels | 4 |
| Package | 28-SSOP (SS) |
| Package Pitch | 0.65 mm |
| Operating Temperature | -40C to +85C |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| Qualification Grade | Industrial (I suffix, -40C to +85C) |
| Product Family | dsPIC33CK MC |
| RoHS Status | Compliant |
| Applications | Motor control, digital power, general embedded |
DSPIC33CK128MC102T-I/SS Pin Configuration
| Pin 1 | MCLR — Master clear reset input |
| Pin 2 | AN0/RA0 — Analog input 0 / port A pin 0 |
| Pin 3 | AN1/RA1 — Analog input 1 / port A pin 1 |
| Pin 4 | AN2/RA2 — Analog input 2 / port A pin 2 |
| Pin 5 | AN3/RA3 — Analog input 3 / port A pin 3 |
| Pin 6 | RA4 — Port A pin 4 |
| Pin 7 | VDD — Positive supply |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1 — Oscillator crystal input / external clock |
| Pin 10 | OSC2 — Oscillator crystal output |
| Pin 11 | VCAP — Core regulator capacitor connection |
| Pin 12 | RB0 — Port B pin 0 (AN/PWM/op-amp alternate functions) |
| Pin 13 | RB1 — Port B pin 1 (AN/PWM/op-amp alternate functions) |
| Pin 14 | RB2 — Port B pin 2 (AN/PWM/op-amp alternate functions) |
| Pin 15 | RB3 — Port B pin 3 (AN/PWM alternate functions) |
| Pin 16 | RB4 — Port B pin 4 (PWM/communication alternate functions) |
| Pin 17 | RB5 — Port B pin 5 (PWM/communication alternate functions) |
| Pin 18 | VDD — Positive supply |
| Pin 19 | VSS — Ground reference |
| Pin 20 | RB8 — Port B pin 8 (PWM/communication alternate functions) |
| Pin 21 | RB9 — Port B pin 9 (PWM/communication alternate functions) |
| Pin 22 | RB10 — Port B pin 10 (AN/PWM alternate functions) |
| Pin 23 | RB11 — Port B pin 11 (AN/PWM alternate functions) |
| Pin 24 | RB12 — Port B pin 12 (AN/op-amp alternate functions) |
| Pin 25 | RB13 — Port B pin 13 (AN/op-amp alternate functions) |
| Pin 26 | RB14 — Port B pin 14 (communication alternate functions) |
| Pin 27 | RB15 — Port B pin 15 (communication alternate functions) |
| Pin 28 | VSS — Ground reference |
Typical Applications
DSPIC33CK128MC102T-I/SS is suitable for 6 applications: BLDC/PMSM Motor Control, Digital Power Conversion, Industrial Automation and Control Panels, Sensor Signal Conditioning and Data Acquisition, Consumer Appliance and Power-Tool Control, High-Performance General Embedded Systems.
BLDC/PMSM Motor Control
The DSPIC33CK128MC102T-I/SS fits brushless DC and PMSM motor control because its 100 MHz dsPIC33CK core executes field-oriented-control (FOC) loops fast enough for multi-kHz PWM switching frequencies, while the integrated op-amps condition low-level current-shunt signals directly for the 12-bit ADC - eliminating external amplifier ICs. In a typical implementation, complementary PWM outputs drive a three-phase inverter gate drivers, ADC triggers are synchronized to the PWM period via DMA, and the 16 KB RAM stores PI/PID state variables and Clarke/Park transform constants. The main performance trade-off is memory bandwidth: reserving DMA buffers for three-phase current sampling consumes a meaningful fraction of the 16 KB RAM, so buffer sizing must be planned early in the design.
Recommended
Digital Power Conversion
Digital PFC and LLC converter control is a primary dsPIC33CK use case. The 100 MHz core provides the arithmetic headroom for high-bandwidth voltage/current loops, the high-resolution PWM delivers fine duty-cycle resolution needed for precise regulation at hundreds of kHz switching frequencies, and the 12-bit ADC samples output voltage and inductor current synchronously with the PWM period. The integrated op-amps can amplify shunt signals before ADC conversion, and four DMA channels move sampled data without CPU intervention, keeping loop latency deterministic. Performance consideration: unlike analog controllers, firmware-based control adds a fixed computation delay, so loop tuning should account for the one-to-two PWM-period latency typical of DSP-servo implementations; the fast core here minimizes it.
Recommended
Industrial Automation and Control Panels
In industrial automation nodes, the DSPIC33CK128MC102T-I/SS serves as a real-time controller for actuators, pumps, and servo subsystems operating from -40C to +85C. The DSP capability accelerates filtering (IIR/FIR) of noisy sensor feedback, the 12-bit ADC digitizes multiple analog process variables, and PWM outputs drive heaters, valves, or small motors. The 128 KB Flash accommodates communication stacks and field-upgradable application logic, while the industrial temperature grade and RoHS compliance support standard factory-equipment build requirements. A design consideration is EMI robustness: placing the controller near switching loads requires careful ground-plane partitioning and supply decoupling to keep ADC noise within the converter's resolution limits during heavy load switching.
Recommended
Sensor Signal Conditioning and Data Acquisition
With on-chip op-amps, a 12-bit ADC, and DMA, this DSC forms a compact acquisition front-end for bridges, shunts, and low-level sensor signals. The op-amps provide gain for millivolt-range outputs, the ADC converts at high sample rates, and DMA streams results into RAM continuously without CPU polling - the DSP instructions then run digital filtering and calibration math at 100 MHz. Compared with a discrete amplifier-plus-MCU chain, the integrated path reduces BOM count, board area, and analog routing noise exposure. The trade-off is calibration: integrated op-amp offset and gain errors must be characterized in firmware, and the 12-bit ADC resolution ceiling means systems needing >12 effective bits should add an external delta-sigma converter.
Recommended
Consumer Appliance and Power-Tool Control
Cost- and performance-sensitive appliances - cordless tools, blenders, fans, e-bike controllers - use dsPIC33CK-class DSCs to run sensorless BLDC control with back-EMF or shunt-based feedback. The 128 KB Flash stores speed-profile tables and protection logic; the 12-bit ADC plus op-amps handles bus-voltage and phase-current sensing; and the high-resolution PWM provides quiet, efficient motor drive with audible-noise benefits from high switching frequency. The -40C to +85C range covers most appliance ambients, and tape-and-reel packaging suits high-volume automated assembly. Design note: appliance EMI and surge environments demand robust input protection, snubbers, and careful layout of the PWM-to-gate-driver nets to avoid radiated-emissions compliance failures.
Recommended
High-Performance General Embedded Systems
Beyond control applications, the DSPIC33CK128MC102T-I/SS works as a high-throughput 16-bit general-purpose MCU where 100 MHz execution, 128 KB Flash, and 16 KB RAM outclass classic PIC16/PIC18 parts. Typical roles include protocol bridging, encrypted telemetry, waveform generation, and legacy DSP offload using hardware MAC instructions and the barrel shifter. Four DMA channels accelerate UART/SPI data movement, and low-power modes suit battery-buffered designs. The main selection trade-off versus an ARM Cortex-M MCU is toolchain ecosystem: dsPIC development uses MPLAB X and the XC16 compiler, so teams standardized on Microchip tooling gain the shortest path to production, while ARM-standardized teams may prefer an STM32-class alternative despite similar performance.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK128MC102T-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK128MC102-I/SS | DSPIC33CK128MC102T-E/SS | DSPIC33CK128MC102T-H/SS | DSPIC33CH128MP202-I/SS |
|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Architecture | dsPIC33CK 16-bit, 100 MHz | dsPIC33CK 16-bit, 100 MHz | dsPIC33CK 16-bit, 100 MHz | dsPIC33CK 16-bit, 100 MHz | dsPIC33CH dual-core 16-bit |
| Program Memory | 128 KB Flash | 128 KB Flash | 128 KB Flash | 128 KB Flash | 128 KB Flash |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
Key Differentiators
- Single-core simplicity with integrated op-amps (vs DSPIC33CH128MP202-I/SS)
- Extended and high-temperature drop-in options (vs DSPIC33CK128MC102T-E/SS and DSPIC33CK128MC102T-H/SS)
- Trade-off: 12-bit ADC ceiling (vs DSPIC33AK128MC102-I/SS)
Design Notes
The dsPIC33CK core is fed by an internal regulator whose VCAP pin requires the exact capacitance specified in the Microchip datasheet (typically a low-ESR ceramic capacitor close to pin 11). Place it within 2-3 mm of the VCAP pin with a solid via to the ground plane; incorrect VCAP decoupling is the most common cause of erratic resets and ADC glitches on this family. Decouple each VDD pair (pins 7 and 18) with a 100 nF ceramic plus a bulk 4.7-10 uF capacitor per rail.
Separate the analog (op-amp/ADC inputs) and power (PWM, gate-driver) ground returns into a single-point star connection under the controller. Route high-slew PWM traces (RB4/RB5, RB8/RB9) away from analog input nets on pins 2-5 and 24-25 to prevent coupling into the 12-bit ADC. On a two-layer board, dedicate the bottom layer as a mostly-continuous ground plane beneath the SSOP-28; on four layers, use an unbroken internal GND plane for best ADC performance.
Do not confuse the temperature-suffix variants when releasing a BOM: the -I/SS is rated to +85C, the -E/SS to +125C, and the -H/SS to +150C; using the -I version in a sealed motor-drive enclosure that exceeds 85C ambient will violate the datasheet absolute maximums even though the footprints are identical. Also verify that MCLR (pin 1) includes a pull-up (4.7-10 kOhm) and series resistor if an external programmer/debugger header is fitted, and reserve a programming header even in production boards.
When sampling shunt currents through the integrated op-amps, synchronize ADC conversion triggers to the PWM period (center-aligned trigger at counter zero or overflow) so sampling lands away from switching-edge noise. Estimated: with 100 MHz core and typical FOC loops at 20-50 kHz PWM, one control iteration consumes 1000-3000 cycles, leaving ample margin; size DMA buffers so two full current-sampling periods fit within the 16 KB RAM to avoid overwriting live data.
Compliance Information
RoHS compliant per standard Microchip dsPIC33CK production data; formal REACH/halogen-free/conflict-minerals declarations should be requested from Microchip product compliance documentation.
