DSPIC33EP256GM604T-I/ML
DSPIC33EP256GM604T-I/ML - 70 MIPS 256KB DSC | Microchip
The Microchip Technology DSPIC33EP256GM604T-I/ML is a 16-bit dsPIC33EP digital signal controller (DSC) delivering up to 70 MIPS core performance, 256 KB (85.5K x 24) of Flash program memory, and 32 KB of RAM, housed in a 44-pin QFN (8x8 mm) package with exposed thermal pad, operating from a 3.3 V supply across the -40C to +85C industrial temperature range.
A digital signal controller combines the compute architecture of a microcontroller with the mathematical acceleration of a digital signal processor. In the power-management hierarchy, the dsPIC33EP family sits between general-purpose MCUs and dedicated DSPs: it executes real-time control loops, digital filters, and transform algorithms while still offering the interrupts, timers, and communication peripherals engineers expect from a microcontroller.
Key features include the DSP-enhanced 16-bit core with barrel shifter and single-cycle MAC, a 4-channel DMA controller that offloads data movement between peripherals and RAM, and a rich peripheral set that includes motor-control PWM, input capture, quadrature encoder interface support, and multiple serial interfaces (UART, SPI, I2C) plus CAN for industrial networks. The device also supports IEEE 1149.2-compatible JTAG boundary scan, in-circuit programming, and three complex plus five simple hardware breakpoints for robust debugging.
Architecturally, the dsPIC33EP256GM604 uses a Harvard architecture with a 24-bit instruction word and pipelined execution, reaching 70 MIPS at its maximum clock rate. CMOS process technology keeps active power low, and multiple low-power modes (Idle, Sleep) allow battery-operated designs to stretch duty cycles. On-chip oscillator options with PLL reduce external BOM cost.
Typical applications include precision motor control (BLDC, PMSM, stepper), digital power conversion (PFC, LLC, solar inverters), and industrial sensing and automation nodes that require DSP-class filtering together with CAN bus connectivity.
Design consideration: place 100 nF ceramic decoupling capacitors at every VDD/VDDCORE pin pair as close to the package as possible, and use the exposed pad as a low-inductance ground connection; the exposed pad is electrically connected to VSS and also improves thermal dissipation.
This page synthesizes distributor availability data, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-24.
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