DSPIC33EP256GM706T-I/PT - 16-bit 70 MIPS DSC, 256KB Flash | Microchip
MPN: DSPIC33EP256GM706T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.71 | $6.71 |
| 10 | $6.38 | $63.80 |
| 100 | $5.9 | $590.00 |
| 500 | $5.5 | $2,750.00 |
| 1,000 | $5.1 | $5,100.00 |
DSPIC33EP256GM706T-I/PT Overview
A digital signal controller combines the compute architecture of a microcontroller with the multiply-accumulate and DSP-grade addressing of a digital signal processor. Within the power-management hierarchy of embedded systems, a DSC sits between a general-purpose MCU and a standalone DSP: it offers single-cycle MAC, a barrel shifter, and 4 DMA channels for real-time control loops, while retaining the flash, peripherals, and development ecosystem of a microcontroller.
Key features include 12 MCPWM (motor control PWM) channels, 8 input capture and 8 output compare peripherals, and 2 quadrature encoder interfaces (QEI) - a peripheral set explicitly targeted at precision motor control. Four integrated operational amplifiers reduce external component count in current-sense front ends, while the Charge Time Measurement Unit (CTMU) supports capacitive touch and precise timing measurement, and the PTG (Pulse Train Generator) automates trigger sequencing.
The dsPIC33E core runs at up to 70 MIPS with CMOS technology and includes boundary-scan (JTAG) capability for in-circuit test, plus low-power modes for energy-sensitive designs. The integrated DSP engine supports fixed-point digital filtering and control algorithms typical of field-oriented motor control.
Typical applications include brushless DC and PMSM motor drives for industrial automation, digital power supplies and inverters, and sensor signal conditioning where the on-chip op-amps and CTMU add value.
Design consideration: the TQFP-64 0.8 mm pitch requires careful decoupling - place 0.1uF ceramics at each supply pair - and MSL handling per the tape-and-reel moisture sensitivity rating before reflow.
This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing (as of 2026-09-24), drop-in family alternatives, and application-level design notes in one citable reference.
Drop-in alternatives for DSPIC33EP256GM706T-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 DSPIC33EP256GM706T-I/PT (same form factor and footprint) — differing in Core Architecture, Package, Packaging, Quadrature Encoder Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128GM706-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64GM706-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP256GM306T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.72 / Unit
View Datasheet →DSPIC33EP256GP706T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP256GM706T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33E DSC core with DSP engine |
| Maximum Performance | 70 MIPS |
| Program Memory (Flash) | 256 KB (85.5K x 24) |
| Data RAM | 16 KB |
| Supply Voltage | 3.3 V |
| MCPWM Channels | 12 |
| Input Capture / Output Compare | 8 / 8 |
| Quadrature Encoder Interfaces | 2 |
| Integrated Op-Amps | 4 |
| DMA Channels | 4 |
| CTMU | Yes (Charge Time Measurement Unit) |
| PTG (Pulse Train Generator) | Yes |
| Barrel Shifter | Yes |
| Boundary Scan (JTAG) | Yes |
| Low-Power Modes | Yes |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 64-TQFP (10x10 mm, 0.8 mm pitch, PT) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
DSPIC33EP256GM706T-I/PT 64-tqfp (10x10 mm, 0.8 mm pitch, pt) Pin Configuration Guide
Pin configuration for DSPIC33EP256GM706T-I/PT (64-tqfp (10x10 mm, 0.8 mm pitch, 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 DSPIC33EP256GM706T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP256GM706T-I/PT is suitable for 6 applications: Brushless DC / PMSM Motor Control, Digital Power Supplies and Inverters, Sensor Signal Conditioning and Measurement, Industrial Automation and Robotics, Audio Signal Processing, Capacitive Touch and HMI Interfaces.
Brushless DC / PMSM Motor Control
The DSPIC33EP256GM706T-I/PT is purpose-built for precision motor control: its 70 MIPS 16-bit DSP core executes field-oriented control (FOC) loops with single-cycle MAC operations, while 12 MCPWM channels generate complementary 3-phase drive signals with hardware dead-time insertion. The 2 quadrature encoder interfaces read position feedback directly, and the 4 on-chip operational amplifiers condition shunt-resistor current measurements without external amplifiers. In a typical 3-shunt FOC inverter, ADC samples triggered by the MCPWM feed the control loop at PWM frequency, and DMA channels move results without CPU overhead. The trade-off versus a discrete analog front end is slightly higher device cost, offset by a smaller BOM and better loop symmetry.
Recommended
Digital Power Supplies and Inverters
Digital switch-mode power supplies, solar micro-inverters, and PFC stages benefit from this part's combination of high-resolution PWM generation and fast deterministic control. The 70 MIPS core closes voltage- and current-mode loops at switching frequencies that would overload general-purpose MCUs, and the 8 output compare modules provide auxiliary timing for synchronous rectification and burst mode. The CTMU can assist with precise time-interval measurement in power-quality monitoring subfunctions, and PTG automates the trigger sequences that coordinate ADC sampling with PWM edges. Because the die runs from a single 3.3V rail across -40C to +85C, it suits industrial power environments, provided layout keeps PWM switching edges away from the analog supply pins.
Recommended
Sensor Signal Conditioning and Measurement
The 4 integrated operational amplifiers make the DSPIC33EP256GM706T-I/PT well suited to analog front ends: they can be configured as programmable-gain amplifiers for bridge sensors, current shunts, or microphone preamps, feeding the on-chip ADC directly. The CTMU (Charge Time Measurement Unit) provides sub-nanosecond-class timing for capacitive touch sensing and precise resistance/time-domain measurements, complementing the DSP core that performs FFT and filtering. With 256KB of Flash, calibration tables, compensation curves, and DSP libraries fit on-chip without external memory. The -40C to +85C grade supports industrial instrumentation, and JTAG boundary scan eases production test of dense analog-digital mixed boards.
Recommended
Industrial Automation and Robotics
In factory automation nodes, servo drives, and robotic joint controllers, this DSC coordinates multi-axis motion: 2 QEI modules decode two incremental encoders simultaneously, while the 70 MIPS core runs cascaded position/velocity/current loops and communication stacks in parallel. The 16KB RAM accommodates buffered control state and fieldbus protocol frames, and 4 DMA channels stream ADC and UART data with minimal CPU intervention. Four op-amps reduce the analog BOM of per-axis current sensing. Operating from 3.3V over the full -40C to +85C industrial range, the device tolerates cabinet environments, and 256KB Flash holds application code plus protocol and diagnostic firmware with headroom for OTA field updates.
Recommended
Audio Signal Processing
The dsPIC33E DSP engine - single-cycle 40-bit multiply-accumulate, barrel shifter, and dual operand fetch - executes audio effects, active crossover filtering, and echo cancellation efficiently at 70 MIPS. The 4 op-amps can serve as input biasing and output buffering stages, reducing external audio conditioning components, while the ADC captures line-level signals for the fixed-point filter pipeline. With 256KB Flash, effect libraries, room-correction filters, and a control UI coexist on one chip. The part is best positioned in cost-sensitive pro-audio accessories, powered speakers, and karaoke/mixing products rather than audiophile DAC power, where a dedicated audio DSP or hi-res codec chain is usually preferable for distortion and dynamic-range reasons.
Recommended
Capacitive Touch and HMI Interfaces
The CTMU peripheral gives the DSPIC33EP256GM706T-I/PT native capacitive-touch sensing capability: it charges sense pads with a constant current and measures charge time, enabling touch keys, sliders, and proximity detection without a dedicated touch controller. The DSC core then applies drift compensation and filtering algorithms from Microchip's touch libraries, and the 12 MCPWM channels can drive haptic feedback, backlight dimming, or buzzer outputs. In appliances, industrial panels, and white goods, this consolidates HMI sensing, display timing, and actuator control into one 64-TQFP device rated -40C to +85C. The main design consideration is grounding and shield electrode layout to meet IEC-style ESD and noise robustness targets in the field.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP256GM706T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128GM706-I/PT | DSPIC33EP64GM706-I/PT | DSPIC33EP256GM306T-I/PT | DSPIC33EP256GP706T-I/PT |
|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm, 0.8 mm pitch) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Performance | 16-bit, 70 MIPS | 16-bit, 70 MIPS | 16-bit, 70 MIPS | 16-bit, 70 MIPS | 16-bit, 70 MIPS |
| Flash Memory | 256 KB (85.5K x 24) | 128 KB (-50%) | 64 KB (-75%) | 256 KB - same | 256 KB - same |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Temperature Grade | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| Packaging | Tape & Reel (T) | Tube/Tray (non-T) | Tube/Tray (non-T) | Tape & Reel (T) | Tape & Reel (T) |
Key Differentiators
- 4 integrated operational amplifiers reduce analog BOM (vs DSPIC33EP256GM306T-I/PT)
- Motor-control-specific peripheral mix (vs DSPIC33EP256GP706T-I/PT)
- Full 256KB Flash in the 64-TQFP footprint (vs DSPIC33EP128GM706-I/PT)
Design Notes
For the 64-TQFP (0.8 mm pitch) footprint, place a 0.1uF ceramic decoupling capacitor at every VDD/VSS pin pair within 2 mm of the pins, plus one 4.7uF-10uF bulk capacitor near the device. Use a solid, unbroken ground plane on layer 2. Keep the crystal/OSC traces short and guarded. Thermal relief: the 10x10 TQFP dissipates modest power at 70 MIPS, but generous copper pour around VSS pins aids heat spreading in sealed industrial enclosures.
In motor-drive layouts, route the 12 MCPWM outputs to gate drivers as short, matched traces and keep switching nodes physically separated from the on-chip op-amp input pins (current-sense shunt Kelvin routing). Analog reference (VREF+/VREF-) traces should be star-routed to a quiet supply. Long PWM runs radiate EMI - add series damping resistors near the driver inputs if EMC testing shows edge ringing, and keep the CTMU touch pads away from PWM return currents.
Verify the actual VDD range in the family datasheet before design lock - listings confirm a 3.3V operating point but the dsPIC33EP family also supports operation at lower core voltage configurations, and brown-out/reset configuration bits must be set explicitly. Do not assume the non-T and T ordering options differ electrically (they do not - same die), and confirm the peripheral differences (op-amp/QEI counts) against the GM706 vs GM306 datasheets before substituting family members on the same footprint.
Compliance Information
RoHS/REACH/lead-free declarations were not present in the captured distributor snippets. MicrochipDirect lists a conflict minerals program, but part-level declaration must be confirmed on the official Microchip product page.
