DSPIC33CK32MC105-E/PT - 100MHz 16-bit DSC 48-TQFP | Microchip
MPN: DSPIC33CK32MC105-E/PT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.3 | $2.30 |
| 10 | $2.07 | $20.70 |
| 100 | $1.86 | $186.00 |
| 500 | $1.7 | $850.00 |
| 1,000 | $1.55 | $1,550.00 |
DSPIC33CK32MC105-E/PT Overview
A Digital Signal Controller combines the computational power of a digital signal processor with the peripheral set and ease of use of a microcontroller. Within the power-management hierarchy, the DSC sits between general-purpose MCUs and dedicated DSPs, making it the preferred choice when deterministic, cycle-accurate control loops must execute fast algorithms such as field-oriented control, digital power conversion, or sensor fusion.
Key features include operation from 3.0V to 3.6V, Flash ECC and fault injection testing for functional-safety designs, SRAM with Memory Built-In Self-Test (MBIST), four DMA channels, and a barrel shifter plus DSP multiply-accumulate engine for efficient signal processing. The high-speed PWM supports complementary outputs with dead-time control, essential for motor-drive and switched-mode power supply topologies.
Architecturally, the modified Harvard core uses separate program and data buses with a 16-bit instruction width, enabling single-cycle MAC operations. The 12-bit ADC pipeline and integrated op-amps allow direct connection of current-sense shunts, reducing external component count and board area in power conversion designs.
Typical applications include brushless DC and PMSM motor control, digital power supplies (LLC, totem-pole PFC), automotive AEC-Q100-adjacent industrial drives, advanced sensing, and capacitive touch interfaces.
Design consideration: keep the supply within the 3.0V to 3.6V window; above +85C ambient the device operates in the extended-range domain (DC to 100 MIPS is guaranteed to +125C, with derating to 70 MIPS permitted up to +150C per the datasheet operating conditions), so verify junction temperature margins in sealed enclosures.
This page synthesizes distributor pricing, drop-in family alternatives, pinout guidance, and practical design notes not found in a single manufacturer source.
Drop-in alternatives for DSPIC33CK32MC105-E/PT β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
DSPIC33CK32MC105-I/PT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
DSPIC33CK32MC105-E/PTVAO
β Drop-Inπ Reference alternative (not in catalog)
DSPIC33CK32MC106-E/PT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
DSPIC33CK64MC105-E/PT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
DSPIC33CK32MC105T-E/PT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
DSPIC33CK32MC105-E/PT Maximum Ratings & Electrical Characteristics
| Core | dsPIC33CK (16-bit DSC core) |
| Maximum CPU Speed | 100 MHz (100 MIPS) |
| Program Flash Size | 32 KB (with ECC) |
| Data SRAM Size | 8 KB (with MBIST) |
| Operating Voltage | 3.0 V to 3.6 V |
| Operating Temperature Range | -40C to +125C (Extended, E) |
| Package | 48-TQFP (7x7 mm), PT |
| On-Chip Op-Amps | 3 |
| Comparators | 1 |
| ADC Resolution | 12-bit (high-speed) |
| PWM | High-speed PWM |
| DMA Channels | 4 |
| Peripheral Trigger Generator (PTG) | Yes |
| Flash ECC / Fault Injection | Yes |
| Extended Operating Range | -40C to +150C at DC to 70 MIPS |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Functional Safety Support | Yes (FuSa) |
DSPIC33CK32MC105-E/PT 48-tqfp (7x7 mm), pt Pin Configuration Guide
Pin configuration for DSPIC33CK32MC105-E/PT (48-tqfp (7x7 mm), pt 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 DSPIC33CK32MC105-E/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CK32MC105-E/PT is suitable for 6 applications: BLDC / PMSM Motor Control, Digital Power Supplies (LLC, Totem-Pole PFC), Advanced Sensing and Touch Interfaces, Automotive Body and Auxiliary Control, Industrial Automation and Robotics, Portable Instrumentation and Medical Sensing.
BLDC / PMSM Motor Control
The DSPIC33CK32MC105-E/PT is purpose-built for sensorless and sensored field-oriented control (FOC) of brushless DC and permanent-magnet synchronous motors. Its 100 MIPS dsPIC33CK core executes single-cycle DSP MAC instructions for Park/Clarke transforms and PI current loops well within a 20 kHz PWM period. The high-speed PWM generates complementary three-phase outputs with programmable dead time, while the 12-bit high-speed ADC samples phase currents synchronously with the PWM center, minimizing switching-noise corruption. The three integrated op-amps amplify shunt currents without external amplifiers, cutting BOM cost. The extended -40C to +125C temperature grade suits sealed motor drives in industrial automation, e-bikes, and HVAC blowers.
Recommended
Digital Power Supplies (LLC, Totem-Pole PFC)
For digital power conversion, the DSPIC33CK32MC105-E/PT provides the deterministic control needed for LLC resonant converters and totem-pole PFC stages. The high-speed PWM supports frequency and phase-shift modulation with sub-nanosecond-class resolution adjustments, and the comparator enables cycle-by-cycle overcurrent protection with hardware response latency faster than any software loop. The 12-bit ADC pipelines voltage and current feedback for voltage-mode or current-mode control laws implemented in DSP math. Running at 100 MIPS from a 3.0V to 3.6V rail, the controller sustains multi-hundred-kHz switching frequencies. Flash ECC and MBIST support functional-safety requirements in server and telecom power supplies operating to +125C ambient.
Recommended
Advanced Sensing and Touch Interfaces
The DSPIC33CK32MC105-E/PT integrates the Peripheral Trigger Generator (PTG) to sequence ADC conversions, PWM updates, and other peripherals autonomously in hardware, creating deterministic sensing loops for ultrasonic, capacitive, and resistive measurement systems without CPU intervention. The 12-bit high-speed ADC with multiple sample-and-hold channels digitizes sensor arrays at high sample rates, while the on-chip op-amps condition low-level signals such as thermocouple or bridge outputs. The 100 MIPS DSP engine runs FFT, filtering, and calibration algorithms on-chip. The PT suffix 48-TQFP offers ample GPIO for matrix scanning, and Microchip's touch library supports projected-capacitive and self-capacitive buttons, sliders, and wheels on this exact device.
Recommended
Automotive Body and Auxiliary Control
Microchip markets the dsPIC33CK family with functional-safety (FuSa) support and AEC-Q100 flow options for automotive segments, and the DSPIC33CK32MC105-E/PTVAO automotive ordering variant shares this device's 48-pin 0.5 mm pitch footprint. In body electronics, auxiliary pumps, valves, and small actuator drives, the DSC's Flash ECC, fault injection testing, and SRAM MBIST provide diagnostic coverage expected in safety-relevant nodes, while the 100 MHz core handles protocol stacks (LIN, CAN via family peripherals) alongside closed-loop control. The extended -40C to +125C grade covers under-hood-adjacent zones. Designers targeting formal automotive builds should order the automotive-qualified suffix directly.
Recommended
Industrial Automation and Robotics
In industrial automation, the DSPIC33CK32MC105-E/PT drives servo sub-assemblies, stepper microstepping, and closed-loop actuator control. The 100 MIPS core executes trajectory interpolation and current loops concurrently, with four DMA channels moving ADC results to RAM without CPU cycles. The high-speed PWM plus comparator hardware realizes fast overcurrent shutdown required around IGBT and MOSFET bridges. Its -40C to +125C operation tolerates cabinet temperatures near drives and heaters, and the 3.0V to 3.6V supply integrates with standard industrial logic rails. The 48-TQFP exposes enough GPIO for encoder interfaces, limit switches, and SPI/I2C connected IO expanders, enabling compact single-chip axis controllers in robot joints and conveyors.
Recommended
Portable Instrumentation and Medical Sensing
Battery-powered instruments benefit from the DSPIC33CK32MC105-E/PT's combination of DSP throughput and low-power modes: the 100 MIPS core completes signal processing bursts quickly, then the device sleeps to extend battery life. The 12-bit ADC with PTG-sequenced conversions supports impedance measurement, bio-signal acquisition front ends, and handheld diagnostic tools, with the three on-chip op-amps providing gain without external amplifiers. The 3.0V to 3.6V operating window matches a single lithium-ion cell through an LDO. Flash ECC and MBIST support the documentation expectations of medical development processes. The 48-TQFP 7x7 mm footprint fits compact probe and wearable-adjacent form factors where board area is constrained.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CK32MC105-E/PT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CK32MC105-I/PT | DSPIC33CK32MC105-E/PTVAO | DSPIC33CK32MC106-E/PT | DSPIC33CK64MC105-E/PT |
|---|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-pin PQFP/TQFP 0.5 mm pitch - same footprint | 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 MIPS) | 100 MHz (100 MIPS) | 100 MHz (100 MIPS) | 100 MHz (100 MIPS) |
| Program Flash | 32 KB (ECC) | 32 KB (ECC) | 32 KB (ECC) | 64 KB (ECC) | 64 KB (ECC) |
| Data SRAM | 8 KB (MBIST) | 8 KB | 8 KB | 8 KB | 8 KB |
| Temperature Range | -40C to +125C (E, extended) | -40C to +85C (I, industrial) | Automotive grade flow, same die | -40C to +125C (E) | -40C to +125C (E) |
| Analog Peripherals | 3 op-amps, 1 comparator, 12-bit HS ADC | 3 op-amps, 1 comparator, 12-bit HS ADC | 3 op-amps, 1 comparator, 12-bit HS ADC | 3 op-amps, 1 comparator, 12-bit HS ADC | 3 op-amps, 1 comparator, 12-bit HS ADC |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
Key Differentiators
- Extended temperature range with high speed retention (vs DSPIC33CK32MC105-I/PT)
- Functional-safety hardware at minimum memory tier (vs DSPIC33CK32MC106-E/PT)
- Integrated triple op-amp front end (vs Generic MCU + external op-amps)
Design Notes
Supply the DSPIC33CK32MC105-E/PT from a regulated 3.3V rail kept strictly within 3.0V to 3.6V per the datasheet operating conditions. Place 0.1 uF ceramic decoupling capacitors at each VDD/VSS pair plus a bulk 10 uF capacitor near the device. When powered from a buck converter, verify ripple plus load transient excursions stay inside the window - brown-out resets in motor-drive applications can interrupt a live PWM stage. Consider Microchip's recommended BOR configuration and verify the 3.3V regulator can supply the full core current at 100 MIPS plus GPIO and op-amp loads.
Estimated: the 48-TQFP (7x7 mm) theta_JA on a standard 4-layer PCB is roughly 40 to 50 C/W (exact value per datasheet thermal table - verify). With typical core current at 100 MIPS of a few tens of milliamps at 3.3V, internal dissipation is on the order of 100 to 150 mW, giving only a 5 to 8 C junction rise - comfortable at +125C ambient. The concern is the +125C to +150C extended window: per the datasheet, above +125C the maximum speed derates to 70 MIPS, so any design targeting that region must cap the CPU clock and re-verify junction margins.
For motor-control layouts, route the ADC current-sense inputs (fed from the on-chip op-amps) as short Kelvin traces directly from the shunt resistors, and synchronize sampling with PWM center via the PTG or PWM-trigger mechanism to avoid switching-noise aliasing. Keep the high-speed PWM outputs away from analog routing planes, and use a solid ground plane under the TQFP. Place the 0.1 uF decoupling capacitors within 2 mm of the VDD pins. When swapping to the same-footprint family parts (MC106, 64MC105), no layout change is needed, simplifying future memory upgrades.
Do not confuse temperature-grade suffixes: the /E/PT is extended range (-40C to +125C, up to 70 MIPS to +150C) while /I/PT stops at +85C - substituting the I grade into a hot enclosure will cause out-of-spec operation even though the parts are pin-identical. Also note the Mouser listing shows non-stocked status with 6-week lead time as of 2026-09-23; plan procurement ahead of production builds. Finally, 32 KB Flash fills quickly with FOC plus communication stacks - compile with a size map before committing to the MC105 over the 64 KB MC106.
Compliance Information
Distributor listings (DigiKey, PCB Electronics) mark the part RoHS compliant. Automotive AEC-Q100 flow is available via the DSPIC33CK32MC105-E/PTVAO variant; the standard E/PT suffix is the extended-temperature industrial grade. REACH, halogen-free, and conflict-minerals status not stated in provided data.
