DSPIC33CK128MP505T-I/M4 - 16-bit 100MHz DSC 128KB Flash | Microchip
MPN: DSPIC33CK128MP505T-I/M4 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.62 | $5.62 |
| 10 | $5.08 | $50.80 |
| 100 | $4.55 | $455.00 |
| 500 | $4.18 | $2,090.00 |
| 1,000 | $3.79 | $3,790.00 |
DSPIC33CK128MP505T-I/M4 Overview
A digital signal controller combines the compute throughput of a DSP with the peripheral integration and deterministic interrupt behavior of a microcontroller. Within the power-management hierarchy, DSCs sit between general-purpose MCUs and dedicated DSPs, making them the de facto standard for digital power conversion and embedded motor control where tight control loops must execute at high frequency with cycle-accurate timing.
Key features include the 100 MHz dsPIC33CK core with DSP engine (single-cycle MAC, barrel shifter), three integrated operational amplifiers, three analog comparators, a CAN-FD controller, and a Peripheral Trigger Generator (PTG) for hardware-autonomous sequencing. The analog front-end integration reduces external component count in power stages and motor drive inverters.
Architecturally, the dsPIC33CK family uses an optimized C compiler-friendly pipeline with zero-overhead loops and hardware divide, enabling single-shunt FOC motor control and high-frequency digital power loops (peak current mode, voltage-mode) to run in a fraction of the PWM period. High-resolution PWM peripherals with dead-time insertion are central to the family positioning for digital power.
Typical applications include digital power supplies (totem-pole PFC, LLC converters), brushless DC and PMSM motor control, solar micro-inverters, and CAN-FD connected industrial sensing nodes. The three on-chip op-amps buffer shunt-resistor current-sense signals directly into the ADC, eliminating external amplifier ICs.
Design consideration: the UQFN package has an exposed thermal pad that must be soldered to a ground pour for both thermal and electrical performance; also verify flash sizing headroom, as 128 KB is shared between application code and bootloader in CAN-FD field-update designs.
This page synthesizes distributor availability data, family drop-in alternatives, and application guidance not consolidated in the manufacturer product page.
Drop-in alternatives for DSPIC33CK128MP505T-I/M4 — 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 DSPIC33CK128MP505T-I/M4 (same form factor and footprint) — differing in CAN Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK256MP505T-I/M4
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.7 / Unit
View Datasheet →DSPIC33CK64MP505T-I/M4
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK128MP505T-H/M4
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK128MP505T-I/M4 Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC core with DSP engine |
| Maximum CPU Speed | 100 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| RAM | 16 KB |
| Package | 48-UQFN (6x6 mm) |
| Number of Pins | 48 |
| On-chip Op-Amps | 3 |
| Comparators | 3 |
| CAN Interface | CAN-FD |
| Peripheral Trigger Generator (PTG) | Yes |
| Product Series | dsPIC33CK128MP505 |
| Functional Safety (FuSa) Support | Yes |
| Operating Temperature Range | -40C to +85C (industrial, I grade) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
DSPIC33CK128MP505T-I/M4 48-uqfn (6x6 mm) Pin Configuration Guide
Pin configuration for DSPIC33CK128MP505T-I/M4 (48-uqfn (6x6 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 DSPIC33CK128MP505T-I/M4.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK128MP505T-I/M4 is suitable for 6 applications: Digital Power Supplies (PFC, LLC, DC-DC), BLDC / PMSM Motor Control, CAN-FD Industrial Networking Nodes, Solar Micro-Inverters and Power Optimization, Advanced Sensing and Data Acquisition, Functional Safety and Industrial Control.
Digital Power Supplies (PFC, LLC, DC-DC)
The DSPIC33CK128MP505T-I/M4 fits digital power conversion because its 100 MHz core closes voltage- and current-mode loops in well under one switching period, and its high-resolution PWM peripherals provide the sub-nanosecond duty resolution and dead-time control required by totem-pole PFC and LLC topologies. In a typical design, the controller samples output voltage and inductor current through its on-chip ADC, executes a PID or nonlinear compensation loop in fixed-point DSP arithmetic, and updates the PWM duty cycle every cycle without software jitter. The three integrated op-amps buffer current-shunt signals on-chip, and the three comparators support hardware cycle-by-cycle overcurrent limiting without CPU intervention - a quantified reliability benefit that removes external comparator and amplifier ICs from the BOM. The CAN-FD port enables digital power supply telemetry in telecom rectifiers and server power shelves.
Recommended
BLDC / PMSM Motor Control
Sensorless field-oriented control (FOC) of brushless DC and PMSM motors is a core application for this DSC. The single-cycle MAC and barrel shifter execute the Clarke/Park transforms and PI current loops fast enough for multi-phase, high-electrical-frequency motors, while the three on-chip operational amplifiers amplify low-side shunt currents directly into the ADC channels - a common single-shunt or three-shunt sensing architecture that saves three external amplifier ICs per drive. The Peripheral Trigger Generator (PTG) sequences ADC sampling to the exact center of the PWM counter so that current sampling avoids switching-edge noise, improving current-signal fidelity without CPU overhead. The 128 KB flash holds a complete FOC stack plus a communication protocol such as CAN-FD for industrial drives, and hardware comparators implement overcurrent shutdown in hardware, independent of firmware latency.
Recommended
CAN-FD Industrial Networking Nodes
The integrated CAN-FD controller makes the DSPIC33CK128MP505T-I/M4 well suited for industrial sensor, actuator, and drive nodes that must communicate at flexible-data-rate CAN speeds while performing real-time local control. The CAN-FD module offloads message handling in hardware, so the 100 MHz CPU remains dedicated to the control loop; the 16 KB RAM buffers receive FIFOs and application data. The Peripheral Trigger Generator autonomously chains ADC conversions and PWM updates, keeping deterministic timing independent of communication traffic - critical in distributed motion and power systems. Industrial -40C to +85C temperature grading and Microchip's Functional Safety (FuSa) program support give system integrators documented development collateral for safety-related nodes such as conveyor drives, PLC I/O, and battery-management slaves in 24V industrial networks.
Recommended
Solar Micro-Inverters and Power Optimization
Grid-tied micro-inverters demand simultaneous MPPT execution, high-frequency PWM generation, grid-synchronization and protection - a workload matched to the dsPIC33CK128MP505's architecture. The 100 MHz core runs the maximum-power-point algorithm and inverter control in fixed-point arithmetic with DSP MAC instructions, while high-resolution PWM outputs drive interleaved boost and DC-AC stages with precise phase staggering. On-chip comparators implement hardware overcurrent and grid-fault shutdown paths faster than any software loop, meeting protection timing requirements without CPU loading. The three op-amps condition AC current-sense shunts on-chip, and the 128 KB flash accommodates MPPT, control, grid-monitoring and communication firmware in one device. The industrial temperature rating covers rooftop junction temperatures, and tape-and-reel packaging supports high-volume inverter manufacturing.
Recommended
Advanced Sensing and Data Acquisition
High-performance sensing nodes benefit from this DSC's combination of analog front-end and DSP throughput. The on-chip op-amps can be configured as programmable-gain amplifiers for sensor signals, and the ADC - triggered deterministically by the PTG or PWM modules - samples without software-induced timing jitter, improving effective signal-to-noise ratio in oversampled acquisitions. The 100 MHz core then applies digital filtering (IIR/FIR with single-cycle MAC) before results leave the chip, so only processed values traverse the CAN-FD or serial link. Typical deployments include power-quality meters, precision current monitors, ultrasonic and capacitive sensing front ends, and industrial condition-monitoring probes. The Functional Safety (FuSa) designation supports use in monitoring functions that feed safety systems, and the 48-pin 6x6 mm UQFN keeps node PCB area compact for dense multi-channel installations.
Recommended
Functional Safety and Industrial Control
Microchip lists the dsPIC33CK128MP505 under its Functional Safety (FuSa) program, providing safety manuals and diagnostic collateral for designs targeting IEC 61508-class industrial control. Within such systems, the DSC executes the control path while hardware comparators, windowed watchdog functionality, and clock monitoring provide independent fault-detection mechanisms that do not depend on firmware correctness. The deterministic 16-bit architecture simplifies timing analysis compared to cache-based 32-bit cores - interrupt latency and loop execution are cycle-predictable, which safety assessors require for worst-case execution time proofs. Applications include safety-rated drives, emergency shutdown logic in process plants, and monitoring controllers in elevator and material-handling systems. The 128 KB flash accommodates both application code and self-test routines, and CAN-FD connects the node to the plant's safety network backbone.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK128MP505T-I/M4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK256MP505T-I/M4 | DSPIC33CK64MP505T-I/M4 | DSPIC33CK128MP505T-H/M4 |
|---|---|---|---|---|
| Package | 48-UQFN (6x6 mm) | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same | 48-UQFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 256 KB | 64 KB | 128 KB |
| CPU Speed | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| On-chip Op-Amps | 3 | 3 | 3 | 3 |
| CAN-FD | Yes | Yes | Yes | Yes |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Extended (H grade - see datasheet) |
| Functional Safety Support | Yes (FuSa) | Yes (FuSa) | Yes (FuSa) | Yes (FuSa) |
Key Differentiators
- Integrated analog front-end (3 op-amps + 3 comparators) (vs DSPIC33CK64MP505T-I/M4)
- Balanced memory sizing (vs DSPIC33CK256MP505T-I/M4)
- Industrial temperature coverage (vs DSPIC33CK128MP505T-H/M4)
Design Notes
The 48-UQFN 6x6 mm package has an exposed thermal pad on the underside that must be soldered to a continuous ground pour. Design the PCB land pattern per the Microchip datasheet recommended footprint, with an array of thermal vias (typically 5x5 or more) connecting the pad to internal ground planes. Insufficient pad soldering is the most common cause of intermittent ground returns and ADC noise issues on UQFN dsPIC33CK designs; use X-ray or AOI inspection on first-article assemblies to verify pad wetting.
Decouple each VDD pin with a 100 nF ceramic capacitor placed within 2 mm of the pin, plus a bulk 10 uF capacitor near the device. The dsPIC33CK core draws dynamic current proportional to its 100 MHz clock and PWM switching activity; inadequate high-frequency decoupling appears as ADC conversion noise and comparator chatter in digital power designs. Follow the layout guidance in Microchip's dsPIC33CK family reference manual and its digital power reference designs for the AVDD/VCORE sequencing requirements before power-up.
Verify flash budget before committing to the 128 KB variant: a bootloader (e.g., CAN-FD field-update loader) plus an FOC stack can consume 60-80 KB, leaving limited headroom for feature growth. If firmware expansion is likely, design in the pin-compatible 256 KB MP505 variant from the start - the identical footprint makes later migration free of PCB changes. Also confirm that the -I industrial grade matches your worst-case ambient; choose the -H/M4 variant for extended thermal environments.
When routing op-amp and ADC input traces for current-shunt sensing, keep them short, guarded by ground, and away from PWM gate-drive signals. Route the shunt Kelvin connections directly to the op-amp input pins. Use the PTG or PWM-triggered sampling windows to sample current away from switching edges; sampling during switch transitions injects dv/dt noise through trace capacitance and is the leading cause of noisy FOC current feedback in dsPIC33CK layouts.
Compliance Information
Compliance data not present in the verified web data provided. Microchip general-purpose MCU families are typically RoHS compliant; confirm on the official Microchip product page before relying on this for regulatory documentation.
