DSPIC33CH256MP205T-I/PT - Dual-Core 16-bit DSC, 256KB Flash | Microchip
MPN: DSPIC33CH256MP205T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.94 | $5.94 |
| 10 | $5.5 | $55.00 |
| 100 | $4.95 | $495.00 |
| 500 | $4.4 | $2,200.00 |
| 1,000 | $3.85 | $3,850.00 |
DSPIC33CH256MP205T-I/PT Overview
A Digital Signal Controller (DSC) is a hybrid microcontroller that combines the deterministic interrupt response of an MCU with the high-throughput math capability of a DSP. As part of the broader 16-bit DSC -> microcontroller -> embedded controller -> semiconductor taxonomy, the dsPIC33CH family targets safety-critical real-time control, where a dedicated slave core can execute time-critical control loops while the main core runs communication stacks, user interfaces, and housekeeping.
Key features include dual 16-bit dsPIC DSC cores, four 16-bit high-resolution PWM channels with 1 ns resolution for precision motor drives, integrated CAN FD peripheral, six UART, two SPI, and two I2C interfaces, plus a 12-bit ADC with up to 24 channels. The integrated peripherals also include six 16-bit timers, eight DMA channels, and a Peripheral Trigger Generator (PTG) for hardware state machines. Functional-safety features such as a Windowed Watchdog Timer (WWDT), Deadman Timer (DMT), and lockable configuration make the device suitable for ASIL-B/SIL-2 capable systems.
Architecturally, the main and slave cores communicate through dedicated shared-memory regions and a hardware mailbox, allowing the slave to be deployed as a tightly coupled control coprocessor. The device supports motor-control profiles including Field-Oriented Control (FOC) of PMSM/BLDC motors, peak-current-mode power conversion, and digital PFC, all of which benefit from the 1 ns PWM edge placement and dual-core determinism.
Typical applications include high-performance BLDC/PMSM motor drives, field-oriented control servo drives, automotive sensor interfaces, and digital switched-mode power supplies. Compared with a single-core DSC, the dedicated slave core offloads the control loop to remove software jitter and free main-core bandwidth for diagnostics and connectivity.
Designers should budget for a robust 3.3 V decoupling network (10 uF + 100 nF near VDD) and, when used in motor-drive hardware, ensure the PWM-to-FET gate-drive timing budget accounts for the 1 ns high-resolution edge placement. The slave-core code is loaded via the main core at boot, so inter-core handshaking must be validated against the published mailbox protocol.
This page consolidates Microchip datasheet parameters, XAIPART distributor pricing, drop-in alternative cross-references, and practical design guidance not available on the manufacturer datasheet alone.
Drop-in alternatives for DSPIC33CH256MP205T-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 DSPIC33CH256MP205T-I/PT (same form factor and footprint) — differing in Core Architecture, Package, Operating Temperature, ADC, Functional Safety.
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DSPIC33CH256MP205-I/PT
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View Datasheet →DSPIC33CH256MP205T-I/PT Maximum Ratings & Electrical Characteristics
| Family | dsPIC33CH |
| Core Architecture | Dual 16-bit dsPIC DSC (main + slave) |
| Main Core Speed | 100 MIPS (90 MHz core clock) |
| Slave Core Speed | 200 MIPS (180 MHz core clock) |
| Program Memory | 256 KB Flash |
| Data RAM | 32 KB + 16 KB slave RAM |
| Package | 48-pin TQFP (PT) 7x7 mm |
| Operating Voltage | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (industrial) |
| ADC | 12-bit, multi-channel |
| High-Resolution PWM | 1 ns edge placement |
| CAN | CAN FD |
| Communication Interfaces | 6x UART, 2x SPI, 2x I2C |
| DMA Channels | 8 |
| Mounting Type | Surface Mount |
DSPIC33CH256MP205T-I/PT 48-pin tqfp (pt) 7x7 mm Pin Configuration Guide
Pin configuration for DSPIC33CH256MP205T-I/PT (48-pin tqfp (pt) 7x7 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 DSPIC33CH256MP205T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33CH256MP205T-I/PT is suitable for 6 applications: Field-Oriented Control (FOC) PMSM Motor Drive, Digital Switched-Mode Power Supply (SMPS), Automotive Sensor Fusion Hub, Industrial Servo Drive, Class-D Audio Amplifier, Solar Inverter / MPPT Controller.
Field-Oriented Control (FOC) PMSM Motor Drive
The DSPIC33CH256MP205T-I/PT's 1 ns high-resolution PWM and dual-core architecture make it ideal for Field-Oriented Control of PMSM and BLDC motors. The 200 MIPS slave core executes the FOC current loop at 16-32 kHz with deterministic timing, while the 100 MIPS main core manages CAN FD communication, fault diagnostics, and a UART- or CAN-connected user interface. According to Microchip's motor-control reference designs, pairing the device with a 10 uF input bulk cap and 100 nF decoupling on each VDD pin preserves analog integrity for current sensing, while the integrated 12-bit ADC with simultaneous sampling supports up to 24 channels of motor-phase feedback.
Recommended
Digital Switched-Mode Power Supply (SMPS)
The DSPIC33CH256MP205T-I/PT fits digital peak-current-mode PFC and LLC resonant converters: the slave core can be dedicated to the peak current loop with 100 ns resolution while the main core handles housekeeping, soft-start, and PMBus communication. The 1 ns HRPWM edges keep the input current THD within PFC specification, and the integrated CAN FD peripheral supports industrial-cabinet telemetry. Per the Microchip datasheet, the device is rated for 3.0-3.6 V VDD with separate ADC-VDD and VDDIO rails; designers should provide a star-grounded 3.3 V analog LDO for the ADC rail.
Recommended
Automotive Sensor Fusion Hub
Although the DSPIC33CH256MP205T-I/PT is not AEC-Q100 qualified, its low-power digital signal controller architecture fits well as a development and rapid-prototyping platform for automotive sensor fusion. The 200 MIPS slave core aggregates SPI data from IMU and magnetic-position sensors, the main core runs Kalman-filter support, and CAN FD connects to a vehicle network for prototype fleets. For production-grade automotive deployment, the AEC-Q100-qualified DSPIC33CH256MP205T-E/PT drop-in alternative should be used; the I/PT variant is suited to industrial-grade pre-production and bench validation.
Recommended
Industrial Servo Drive
Industrial servo drives benefit from the DSPIC33CH256MP205T-I/PT's dual-core determinism. The slave core closes the position loop with low latency, the main core runs EtherCAT (via external ASIC) or CAN FD comms, and the 256 KB Flash supports motion-control libraries plus a web-based human-machine interface (HMI). The 48-pin TQFP footprint allows compact PCB designs with integrated gate drivers and isolated CAN, while the device's industrial -40C to +85C temperature rating matches factory-floor requirements without derating.
Recommended
Class-D Audio Amplifier
The DSPIC33CH256MP205T-I/PT can drive a Class-D amplifier using its high-resolution PWM as a hardware 1 ns-edge audio modulator. The slave core processes I2S stream from the audio codec, generates complementary PWM signals with built-in dead-time insertion, and runs closed-loop feedback for output ripple reduction, while the main core handles the I2C-controlled audio front panel and over-current fault handling. Designers should add a small RF choke and 100 nF capacitors on each PWM output to meet EMC emissions.
Recommended
Solar Inverter / MPPT Controller
Maximum Power Point Tracking (MPPT) and grid-tie inverter controls benefit from the DSPIC33CH256MP205T-I/PT's dual-core architecture. The slave core runs the perturb-and-observe MPPT algorithm at 10-50 kHz with deterministic ADC sampling and PWM generation, while the main core handles Modbus or CAN FD telemetry, anti-islanding monitoring, and grid-synchronization loops. The 32+16 KB RAM supports state observers for grid impedance estimation, and the 256 KB Flash holds grid-code libraries (e.g., IEEE 1547 compatibility) alongside the firmware upgrade slot.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33CH256MP205T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33CH256MP205-I/PT | DSPIC33CH128MP205-I/PT | DSPIC33CH128MP206-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-pin TQFP (PT) | 48-pin TQFP (PT) - same | 48-pin TQFP (PT) - same | 48-pin TQFP (PT) - same |
| Flash Memory | 256 KB | 256 KB | 128 KB | 128 KB |
| RAM (main + slave) | 32 + 16 KB | 32 + 16 KB | 16 + 16 KB | 16 + 16 KB |
| Main Core Speed | 100 MIPS (90 MHz) | 100 MIPS (90 MHz) | 100 MIPS (90 MHz) | 100 MIPS (90 MHz) |
| Slave Core Speed | 200 MIPS (180 MHz) | 200 MIPS (180 MHz) | 200 MIPS (180 MHz) | 200 MIPS (180 MHz) |
| Operating 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 |
| Industrial Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Dual-core 100+200 MIPS architecture frees main core from control loops (vs DSPIC33CK64MC105)
- Drop-in compatible with package-tray variant for prototyping flexibility (vs DSPIC33CH256MP205-I/PT)
- Flash tier down to 128 KB allows cost optimization within same footprint (vs DSPIC33CH128MP205-I/PT)
Design Notes
The DSPIC33CH256MP205T-I/PT requires separate power rails for VDD (digital core) and AVDD (ADC analog). Use a 3.3V LDO with separate ferrite beads on each analog VDD pin, with 10 uF bulk + 100 nF decoupling on every VDD/AVDD pin. In dual-core FOC designs the device can draw up to 80 mA at maximum clock - budget for a 250 mA LDO to handle cold-start inrush safely.
In a 48-pin TQFP package with theta_JA around 50 C/W (per Microchip packaging notes), at full 200 MIPS slave + 100 MIPS main dual-core utilization the IC draws ~80 mA from 3.3 V, dissipating ~0.26 W. Estimated: junction-to-ambient rise is ~13 C. For industrial -40 to +85 C operation this is well within limits, but avoid sealing the IC in an enclosed inverter module without thermal vias to inner copper layers for margin.
When routing the 0.5 mm pitch 48-pin TQFP, use 0.20 mm traces with 0.20 mm spaces into a 4-layer PCB with a continuous ground plane under the device. Avoid routing analog ADC traces under or parallel to the high-resolution PWM outputs; use differential routing for 12-bit ADC inputs with a 100 nF RC filter as close to the AIN pin as possible. Keep crystal traces short (under 10 mm) and guard the OSC1/OSC2 pair with a continuous ground ring.
Do not forget to flash the slave core firmware from the main core at boot - the slave runs no code until the main core writes its program to the slave-priviliged Flash region. Configuration mismatches between main and slave are common pitfalls; Microchip provides an MPLAB Code Configurator plugin that auto-generates the IPC mailbox protocol headers. Other common pitfalls: leaving the ICSP pins (PGECx/PGEDx) free-floating during tests causes parasitic programming-mode entry; tie a 10 kohm pull-down on MCLR for robust reset.
Compliance Information
RoHS/REACH compliance declared by Microchip. The DSPIC33CH256MP205T-I/PT is industrial-temperature grade and is NOT AEC-Q100 qualified - for AEC-Q100 automotive deployment use the DSPIC33CH256MP205T-E/PT or DSPIC33CH256MP205T-H/PT family variants.
