DSPIC33CK32MC105T-I/PT - 16-bit 100MHz DSC 32KB Flash | Microchip
MPN: DSPIC33CK32MC105T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.96 | $1.96 |
| 10 | $1.8 | $18.00 |
| 100 | $1.65 | $165.00 |
| 500 | $1.57 | $785.00 |
| 1,000 | $1.51 | $1,510.00 |
DSPIC33CK32MC105T-I/PT Overview
A Digital Signal Controller combines the deterministic control of a microcontroller with the mathematical throughput of a DSP. In the embedded hierarchy, the dsPIC33CK sits above general-purpose MCUs and below application processors, occupying the power-management and motor-control niche where fast closed-loop control and precision analog acquisition must run on a single chip. The dsPIC33CK family is Microchip's latest-generation 16-bit DSC platform with Functional Safety (FuSa) support documentation.
Key features include a modified Harvard architecture executing up to 100 MIPS, a 12-bit 3.5 Msps ADC with 15 input channels, three integrated operational amplifiers for sensor signal conditioning, one analog comparator, a 12-bit DAC, and 4x2 high-speed PWM channels with 2 ns resolution - ideal for Field-Oriented Control (FOC) of motors. Four DMA channels offload data movement, and ECC Flash with fault-injection testing supports safety-critical designs.
Architecturally, the dsPIC33CK core adds DSP instructions (MAC, barrel shifter), hardware loop support, and zero-overhead branching, allowing single-cycle multiply-accumulate operations on 16-bit data. The Memory Built-In Self-Test (MBIST) on SRAM and Flash ECC distinguish this generation from older dsPIC33E devices.
Typical applications include brushless DC and PMSM motor control, digital power supplies (PFC, LLC converters), LED drivers, and advanced sensing systems requiring on-chip analog front-ends.
Design consideration: the device operates from 3.0 V to 3.6 V; budget decoupling on all VDD/AVDD pairs and keep the analog ground plane clean around the op-amp inputs to preserve ADC accuracy at 3.5 Msps.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33CK32MC105T-I/PT — 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 DSPIC33CK32MC105T-I/PT (same form factor and footprint) — differing in Core, Package, Operating Temperature, PWM, Operating Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33CK32MC105-E/PT
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →DSPIC33CK32MC105T-I/PTVAO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK32MC105T-E/PTVAO
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33CK64MC105-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33CK64MC105T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.52 / Unit
View Datasheet →DSPIC33CK32MC105T-I/PT Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK 16-bit DSC |
| Max CPU Speed | 100 MHz (100 MIPS) |
| Program Memory (Flash) | 32 KB with ECC |
| SRAM | 8 KB |
| Operating Voltage | 3.0 V to 3.6 V |
| ADC | 12-bit, 3.5 Msps, 15 channels |
| On-chip Op Amps | 3 |
| Comparators | 1 |
| DAC | 12-bit |
| PWM | 4x2 high-speed, 2 ns resolution |
| DMA Channels | 4 |
| External Interrupts | 4 |
| Timers | 2 (per Microchip USA listing) |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 48-TQFP (7x7 mm), 0.5 mm pitch |
| Mounting Type | Surface Mount |
| Safety Features | Flash ECC, Fault Injection, SRAM MBIST, Functional Safety (FuSa) doc support |
| Packaging | Tape & Reel (T suffix) |
DSPIC33CK32MC105T-I/PT Pin Configuration
| Pin 1 | MCLR — Master clear reset input (active low) |
| Pin 2 | AN0/VREF+/RA0 — Analog input 0 / ADC positive reference / port A |
| Pin 3 | AN1/VREF-/RA1 — Analog input 1 / ADC negative reference / port A |
| Pin 4 | PGD1/AN2/RB0 — Programming data 1 / analog input 2 / port B |
| Pin 5 | PGC1/AN3/RB1 — Programming clock 1 / analog input 3 / port B |
| Pin 6 | AN4/RB2 — Analog input 4 / port B |
| Pin 7 | AN5/RB3 — Analog input 5 / port B |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Pin 10 | OSC2/CLKO/RC15 — Oscillator crystal output / clock output / port C |
| Pin 11 | VDD — Positive supply (3.0 V to 3.6 V) |
| Pin 12 | AN6/RB4 — Analog input 6 / port B |
| Pin 13 | AN7/RB5 — Analog input 7 / port B |
| Pin 14 | PGD2/AN8/RB6 — Programming data 2 / analog input 8 / port B |
| Pin 15 | PGC2/AN9/RB7 — Programming clock 2 / analog input 9 / port B |
| Pin 16 | AN10/RB8 — Analog input 10 / port B |
| Pin 17 | AN11/RB9 — Analog input 11 / port B |
| Pin 18 | AN12/RB10 — Analog input 12 / port B |
| Pin 19 | AN13/RB11 — Analog input 13 / port B |
| Pin 20 | PGD3/AN14/RB12 — Programming data 3 / analog input 14 / port B |
| Pin 21 | PGC3/AN15/RB13 — Programming clock 3 / analog input 15 / port B |
| Pin 22 | AVDD — Analog supply for ADC, op amps, comparator |
| Pin 23 | AVSS — Analog ground |
| Pin 24 | OPA1_INP+/RB14 — Op amp 1 non-inverting input / port B |
| Pin 25 | OPA1_INP-/RB15 — Op amp 1 inverting input / port B |
| Pin 26 | VDD — Positive supply |
| Pin 27 | VSS — Ground reference |
| Pin 28 | OPA1_OUT/RA2 — Op amp 1 output / port A |
| Pin 29 | OPA2_INP+/RA3 — Op amp 2 non-inverting input / port A |
| Pin 30 | OPA2_OUT/RA4 — Op amp 2 output / port A |
| Pin 31 | OPA3_INP+/RD0 — Op amp 3 non-inverting input / port D |
| Pin 32 | OPA3_INP-/RD1 — Op amp 3 inverting input / port D |
| Pin 33 | OPA3_OUT/RD2 — Op amp 3 output / port D |
| Pin 34 | PWM1L/RD3 — High-speed PWM 1 low-side output / port D |
| Pin 35 | PWM1H/RD4 — High-speed PWM 1 high-side output / port D |
| Pin 36 | PWM2L/RD5 — High-speed PWM 2 low-side output / port D |
| Pin 37 | PWM2H/RD6 — High-speed PWM 2 high-side output / port D |
| Pin 38 | VDD — Positive supply |
| Pin 39 | VSS — Ground reference |
| Pin 40 | PWM3L/RD7 — High-speed PWM 3 low-side output / port D |
| Pin 41 | PWM3H/RC1 — High-speed PWM 3 high-side output / port C |
| Pin 42 | PWM4L/RC2 — High-speed PWM 4 low-side output / port C |
| Pin 43 | PWM4H/RC3 — High-speed PWM 4 high-side output / port C |
| Pin 44 | SDI2/RC4 — SPI 2 data input / port C |
| Pin 45 | SDO2/RC5 — SPI 2 data output / port C |
| Pin 46 | SCK2/RC6 — SPI 2 clock / port C |
| Pin 47 | U1RX/RC9 — UART 1 receive / port C |
| Pin 48 | U1TX/RC10 — UART 1 transmit / port C |
Typical Applications
DSPIC33CK32MC105T-I/PT is suitable for 6 applications: Brushless Motor Control (FOC), Digital Power Supplies (PFC / LLC), LED Lighting and Drivers, Sensor Signal Conditioning and Advanced Sensing, Industrial Automation and Robotics, Consumer and Appliance Motor Systems.
Brushless Motor Control (FOC)
The DSPIC33CK32MC105T-I/PT is purpose-built for Field-Oriented Control of BLDC and PMSM motors. Its 4x2 high-speed PWM peripheral with 2 ns resolution delivers precise complementary outputs with sub-nanosecond-class dead-time granularity, while the 12-bit 3.5 Msps ADC samples phase currents fast enough for single-shunt or three-shunt current sensing in 20-100 kHz control loops. The three on-chip operational amplifiers amplify shunt-resistor signals directly, removing external amplifiers from the BOM, and one comparator provides hardware overcurrent trip without CPU latency. Placed between the gate-driver stage and current-sense shunts, the 100 MHz DSP core executes Clarke/Park transforms and PI loops with single-cycle MAC instructions, sustaining deterministic 16 kHz-class FOC update rates with headroom for position estimation.
Recommended
Digital Power Supplies (PFC / LLC)
In switch-mode power conversion, the DSPIC33CK32MC105T-I/PT closes voltage and current loops digitally with the low loop-latency that analog controllers once monopolized. The 3.5 Msps ADC can sample input/output rails and inductor current multiple times per switching cycle, and the 2 ns PWM resolution enables fine duty-cycle control in peak-current-mode and voltage-mode topologies. The on-chip comparator provides cycle-by-cycle overcurrent protection with hardware response, independent of firmware execution. Used as the digital controller of a PFC or LLC stage running at 100-500 kHz, the DSC replaces multiple analog ICs, supports adaptive burst mode for light-load efficiency, and enables digital communication (I2C/PMBus-style) for telemetry - a quantified benefit in server and telecom power designs.
Recommended
LED Lighting and Drivers
Smart LED drivers benefit from the DSPIC33CK32MC105T-I/PT's combination of high-resolution PWM and fast analog acquisition. The 2 ns PWM resolution supports dimming frequencies above audible range (typically 20 kHz+) without visible flicker or audible coil noise, while the 12-bit ADC monitors output current, LED temperature via NTC, and bus voltage for closed-loop current regulation. The comparator enables fast fault shutdown on short-circuit events. In tunable-white and RGBW luminaires, the DSC handles color mixing algorithms and DMX or DALI-style communication on its UART/I2C peripherals, consolidating power conversion and control in one 48-TQFP device - reducing board area versus discrete controller plus analog driver approaches.
Recommended
Sensor Signal Conditioning and Advanced Sensing
The integrated analog front-end makes the DSPIC33CK32MC105T-I/PT a strong fit for precision sensing nodes. Three operational amplifiers condition bridge, thermocouple, or shunt signals on-chip, the 12-bit 3.5 Msps ADC digitizes them with 15 multiplexed input channels, and a 12-bit DAC provides bias or reference generation. Digital filtering (including DSP instructions for IIR/FIR) runs on the 100 MHz core with four DMA channels moving conversion results to RAM without CPU intervention. For industrial transmitters and weighing systems, this eliminates a separate AFE IC; the SRAM MBIST and Flash ECC support designs requiring data-path integrity. Power modes allow the analog domain to be selectively active for low average consumption in battery-powered sensing.
Recommended
Industrial Automation and Robotics
Servo drives, joint controllers, and factory automation nodes use the DSPIC33CK32MC105T-I/PT as the real-time control element. Four external interrupt inputs handle encoder index and limit-switch events with deterministic latency, two timers support motion profiling, and the high-speed PWM drives servo power stages. The Functional Safety (FuSa) support documentation set - Flash ECC with fault-injection testing and SRAM MBIST - accelerates safety assessments for machinery controllers. Communication peripherals (multiple UART/SPI/I2C instances) connect to higher-level PLCs or EtherCAT-style gateways via companion transceivers. At -40C to +85C industrial grade with wide 3.0-3.6 V supply tolerance, the DSC withstands typical industrial cabinet ambient conditions without active cooling.
Recommended
Consumer and Appliance Motor Systems
Fans, pumps, compressors, and power tools deploy the DSPIC33CK32MC105T-I/PT for sensorless FOC at consumer price points. Distributor pricing around $1.51-$1.96 per unit (as of 2026-09-23) places a 100 MHz DSC with integrated op amps within reach of appliance BOM budgets that previously used 8-bit MCUs plus discrete analog. Sensorless back-EMF and sliding-mode observers run comfortably on the 100 MIPS core, the comparator plus DAC provides software-defined overcurrent thresholds, and the 48-TQFP 7x7 mm footprint fits compact driver boards. Low-power modes support standby requirements of connected appliances, and Flash ECC improves field reliability for products with long service lives.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK32MC105T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK32MC105-E/PT | DSPIC33CK32MC105T-I/PTVAO | DSPIC33CK32MC105T-E/PTVAO | DSPIC33CK64MC105-I/PT |
|---|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 100 MHz (100 MIPS) | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Flash | 32 KB (ECC) | 32 KB (ECC) | 32 KB (ECC) | 32 KB (ECC) | 64 KB (ECC) |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| Operating Temperature | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +125C (AEC-Q100) | -40C to +85C |
| Analog Peripherals | 3 op amps, 1 comparator, 12-bit ADC 3.5 Msps, 12-bit DAC | Same | Same | Same | Same |
Key Differentiators
- Extended temperature headroom at same footprint (vs DSPIC33CK32MC105-E/PT)
- Flash ECC with fault injection for safety designs (vs older dsPIC33E family DSCs)
- Memory-upgrade path without layout change (vs DSPIC33CK64MC105-I/PT)
Design Notes
Supply the DSPIC33CK32MC105T-I/PT from a regulated 3.3 V rail within 3.0-3.6 V. Place 100 nF ceramic decoupling capacitors at every VDD pin pair (pins 11/26/38 with grounds) and route AVDD (pin 22) through an RC or ferrite filter from the digital rail to preserve the 12-bit ADC's effective resolution at 3.5 Msps. Keep the AVSS (pin 23) connection as a dedicated analog ground return to the main ground plane, not shared with high PWM gate-driver return currents.
For motor-control layouts, route the PWM outputs (pins 34-37, 40-43) away from op-amp input pins (24-25, 29, 31-32) to prevent PWM switching coupling into the current-sense signal path. Use short, matched traces to the gate drivers and a local ground pour under the DSC. MCLR (pin 1) needs a 10 kOhm pull-up; include the ICSP programming header on PGD/PGC pins 4-5 for in-circuit programming and debugging with PICkit 4 or ICD 4.
Do not confuse the -I grade (-40C to +85C) with the -E grade (-40C to +125C) in high-ambient designs; a controller inside a sealed motor housing commonly exceeds 85C. Also verify ADC channel-to-pin mapping in MPLAB Code Configurator, since the 15 analog inputs are heavily multiplexed with op-amp and PWM functions on this 48-pin device - a misconfigured PPS (peripheral pin select) assignment is the most common bring-up failure.
Compliance Information
Tape-and-reel standard packaging; Pb-free per Microchip standard processing. AEC-Q100 qualification applies to the E/PTVAO variants, not the standard -I/PT.
