DSPIC33CK128MC103T-I/M5 - 100MHz 16-Bit DSC 128KB Flash | Microchip
MPN: DSPIC33CK128MC103T-I/M5 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.85 | $38.50 |
| 100 | $3.4 | $340.00 |
| 500 | $3.05 | $1,525.00 |
| 1,000 | $2.75 | $2,750.00 |
DSPIC33CK128MC103T-I/M5 Overview
A digital signal controller combines the computational throughput of a DSP with the deterministic peripheral control of a microcontroller. In the embedded hierarchy, the dsPIC33CK family sits between general-purpose MCUs and full DSPs, making it a power management IC-adjacent control solution for digital power conversion, motor control, and advanced sensing loops where fixed-point math must execute fast and predictably.
Key features include operation at up to 100 MHz (100 MIPS) from a 3 V to 3.6 V supply, a 17-channel 12-bit ADC, two 12-bit DACs, integrated operational amplifiers, and high-resolution PWM peripherals for Field-Oriented Control (FOC). The part provides 27 general-purpose I/O pins, 4 DMA channels and 3 serial I/O ports per family documentation, plus a barrel shifter and boundary-scan capability.
Technically, the dsPIC33CK core is a pipelined 16-bit fixed-point engine with DSP multiply-accumulate instructions and deterministic interrupt latency. The tight coupling between the 12-bit ADC sample triggers and the high-resolution PWM makes closed-loop control cycles short and jitter-free, which is essential in digitally controlled buck converters and PFC stages.
Typical applications include brushless DC and PMSM motor control (FOC), digital switch-mode power supplies, USB-C Power Delivery adapters, and precision sensor signal conditioning where the on-chip op-amps and 12-bit DACs reduce external component count.
When designing with this device, respect the 3.0 V to 3.6 V operating window and decouple the 36-UQFN power pins with low-ESR ceramics; the exposed pad must be soldered to ground for thermal and signal integrity.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33CK128MC103T-I/M5 — 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 DSPIC33CK128MC103T-I/M5 (same form factor and footprint) — differing in Package, Core Architecture, Operating Temperature, RoHS Status, ADC Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK128MC103T-E/M5
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK128MC103T-H/M5
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK256MC103T-I/M5
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK64MC103T-I/M5
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.58 / Unit
View Datasheet →DSPIC33CK32MC103T-I/M5
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.65 / Unit
View Datasheet →DSPIC33CK128MC103T-I/M5 Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC core |
| Core Size | 16-bit |
| Maximum Clock Speed | 100 MHz (100 MIPS) |
| Program Memory Size | 128 KB (128K x 8) FLASH |
| RAM Size | 16 KB |
| Operating Voltage | 3 V to 3.6 V |
| Number of I/O | 27 |
| ADC Resolution | 12-bit |
| ADC Channels | 17-channel |
| DAC Resolution | 12-bit |
| DAC Channels | 2 |
| On-chip Op-Amps | Yes (integrated op-amps) |
| PWM | High-resolution PWM |
| Package | 36-UQFN (5x5 mm), 5x5x0.6 mm |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Packaging | Tape & Reel (T suffix) |
| RoHS Status | Compliant (ROHS COMPLIANT: YES per Newark) |
DSPIC33CK128MC103T-I/M5 36-uqfn (5x5 mm), 5x5x0.6 mm Pin Configuration Guide
Pin configuration for DSPIC33CK128MC103T-I/M5 (36-uqfn (5x5 mm), 5x5x0.6 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 DSPIC33CK128MC103T-I/M5.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK128MC103T-I/M5 is suitable for 6 applications: BLDC/PMSM Motor Control (FOC), Digital Switch-Mode Power Supplies, Precision Sensor Signal Conditioning, Industrial Automation and Control Nodes, Power Tools and Appliance Motor Drives, Portable and IoT Connected Devices.
BLDC/PMSM Motor Control (FOC)
The DSPIC33CK128MC103T-I/M5 fits motor Field-Oriented Control (FOC) because its 100 MHz (100 MIPS) dsPIC33CK core executes the Clarke/Park transforms and PI current loops deterministically, while the 17-channel 12-bit ADC samples phase currents and the DC bus without CPU-triggered jitter. The high-resolution PWM generates complementary center-aligned drive for three-phase inverters, and the on-chip op-amps can amplify shunt-current signals, removing external amplifier ICs. In a typical topology, the MCU sits between a gate-driver stage (e.g., MCP8025-class integrated drivers) and a power inverter, closing current loops at tens of kHz. The quantified benefit is a control loop latency budget under one PWM period, enabling efficient torque ripple control in fans, pumps, e-bikes and power tools.
Recommended
Digital Switch-Mode Power Supplies
For digitally controlled buck, boost, LLC and PFC converters, the DSPIC33CK128MC103T-I/M5 aligns its high-resolution PWM with a 12-bit ADC to close voltage and current loops in real time. The 100 MHz core supports 100 MIPS, allowing control-law updates every switching cycle even at hundreds of kHz switching frequencies. The two 12-bit DACs can generate reference thresholds for comparators, supporting peak-current-mode control hardware triggers. The controller is placed between the feedback divider and the PWM gate driver of the power stage; unlike analog control ICs it permits firmware-tunable compensation. The concrete benefit is adaptive compensation and telemetry (via serial ports) in server power, USB-C PD adapters and telecom rectifiers, where transient response specifications of a few percent undershoot must be met.
Recommended
Precision Sensor Signal Conditioning
The integrated op-amps, 17-channel 12-bit ADC and two 12-bit DACs make the DSPIC33CK128MC103T-I/M5 well suited to conditioning bridge and current-sensor signals directly on-chip. The op-amps amplify low-level shunt or strain-gauge outputs before the ADC samples them; the DACs provide programmable offsets or comparison thresholds for out-of-range detection in hardware. Operating at 100 MHz, the controller applies digital filtering and calibration (offset/gain correction in firmware) with margin to spare, while 16 KB RAM buffers sample blocks for FFT or rms computation via the DSP MAC instructions. The quantified benefit is reduced BOM count - external instrumentation amplifiers and reference DACs are eliminated - in pressure sensing, weigh scales and industrial condition monitoring systems.
Recommended
Industrial Automation and Control Nodes
In factory automation, the DSPIC33CK128MC103T-I/M5 acts as a deterministic control and interface node: its 3 serial I/O ports connect to sensors, actuators and supervisory links, 27 GPIO lines drive relays and read limit switches, and 4 DMA channels stream ADC data to RAM without CPU intervention. The 100 MHz core executes PID positioning loops for small actuators while concurrently handling communication framing. Operating from a regulated 3.3 V rail inside industrial 24 V systems, it typically interfaces to the bus through isolated transceivers. The concrete benefit is cycle-accurate I/O timing for sequencing tasks - hardware PWM and ADC triggers are immune to interrupt-load jitter, which matters for valve control, stepper-driven positioning and machine-state machines in PLC I/O modules.
Recommended
Power Tools and Appliance Motor Drives
The dsPIC33CK Value Line positioning of the MC10x family makes the DSPIC33CK128MC103T-I/M5 cost-effective for cordless power tools and white-goods appliance drives, where FOC of brushless motors must coexist with aggressive cost targets. Its 100 MIPS core and hardware high-resolution PWM run sensorless observers (back-EMF or sliding-mode) without floating-point hardware; fixed-point DSP instructions handle the arithmetic efficiently. The 128 KB FLASH accommodates field-weakening, start-up ramps and communication code alongside the control loops. Placed between a single-shunt or three-shunt current-sense network and the gate drivers of an inverter stage, it delivers sensorless startup and high efficiency; the measurable benefit is quiet, low-acoustic-noise commutation and extended battery runtime versus trapezoidal (six-step) control.
Recommended
Portable and IoT Connected Devices
For portable and connected devices, the DSPIC33CK128MC103T-I/M5 combines 100 MHz control performance with a compact 5x5 mm 36-UQFN footprint and 3.0 V to 3.6 V operation, matching a single Li-ion cell regulated to 3.3 V. The 36-pin leadless package minimizes board area in handheld, wearable and connected sensor hardware, while the 12-bit ADC and DACs support local measurement and actuation tasks. Serial ports (UART/SPI/I2C-class peripherals among the 3 serial I/O ports) link to radio modules and cloud gateways, and the 128 KB FLASH leaves room for firmware-update images. Low-power modes of the dsPIC33CK family let the device sleep between sampling windows; the practical benefit is a single-chip control-plus-connectivity front end replacing an MCU-DSP pair.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK128MC103T-I/M5 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK128MC103T-E/M5 | DSPIC33CK128MC103T-H/M5 | DSPIC33CK256MC103T-I/M5 | DSPIC33CK64MC103T-I/M5 |
|---|---|---|---|---|---|
| Package | 36-UQFN (5x5 mm) | 36-UQFN (5x5 mm) - same | 36-UQFN (5x5 mm) - same | 36-UQFN (5x5 mm) - same | 36-UQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 100 MHz (100 MIPS) | 100 MHz (100 MIPS) | 64 MHz | 100 MHz (100 MIPS) | 100 MHz (100 MIPS) |
| FLASH Memory | 128 KB | 128 KB | 128 KB | 256 KB | 64 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Operating Temperature | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +85C | -40C to +85C (I grade) | -40C to +85C (I grade) |
| ADC / DAC | 17-ch 12-bit ADC, 2x 12-bit DAC | 17-ch 12-bit ADC, 2x 12-bit DAC | 17-ch 12-bit ADC, 2x 12-bit DAC | 17-ch 12-bit ADC, 2x 12-bit DAC | 17-ch 12-bit ADC, 2x 12-bit DAC |
| GPIO Count | 27 | 27 | 27 | 27 | 27 |
Key Differentiators
- Full 100 MHz speed grade (vs DSPIC33CK128MC103T-H/M5)
- Industrial temperature rating at lower cost (vs DSPIC33CK128MC103T-E/M5)
- Integrated analog (op-amps + 12-bit ADC/DAC) (vs DSPIC33CK64MC103T-I/M5)
Design Notes
The DSPIC33CK128MC103T-I/M5 operates from 3.0 V to 3.6 V per distributor specification data. Regulate the rail with a low-noise LDO or buck converter and place 100 nF ceramic capacitors at each VDD pin pair plus one 4.7-10 uF bulk capacitor near the 36-UQFN. Do not feed 5 V logic levels into GPIOs - use level shifting, since the absolute upper operating limit is 3.6 V. Estimated: a 100 MHz core drawing typical tens of mA produces modest dissipation, but verify against the datasheet electrical characteristics table for your exact clock configuration.
The 36-UQFN (5x5 mm) leadless package requires a PCB land pattern with an exposed ground pad that must be soldered down - do not leave it as a thermal relief island if analog performance matters, because the pad is both the main heat path and a ground reference. Follow Microchip's recommended land-pattern and via-array guidelines (via stitching from the pad to the ground plane) in the datasheet packaging section. Keep the high-resolution PWM outputs and ADC sense traces short and away from the crystal/oscillator routing.
For motor-control or digital-power layouts, route phase-current shunt signals differentially into the op-amp/ADC inputs, with Kelvin connections directly at the shunt terminals. Synchronize ADC sampling to the PWM center (trigger via the hardware PWM module rather than software timers) to sample at zero-vector instants when switching noise is minimal - this is the standard pattern shown in Microchip dsPIC33CK FOC reference designs. Estimated: sampling away from switching edges can reduce ADC noise errors substantially in real inverters.
Do not confuse speed grades when ordering: the -I/M5 runs at 100 MHz, but the -H/M5 variant tops out at 64 MHz per Microchip USA data - firmware configured for 100 MHz will misbehave on the H part. The 'T' suffix indicates tape-and-reel packaging; the non-T tray part is functionally identical. Also confirm programming/debugging support: use a PICkit 4, SNAP or ICD 4 toolchain with current MPLAB X, as legacy programmers for older dsPIC30/33F parts may not support dsPIC33CK devices.
Compliance Information
Newark listing states 'ROHS COMPLIANT: YES' and lead-free. REACH, halogen-free and conflict-minerals declarations not stated in provided data - consult Microchip environmental documentation.
