DSPIC33EP256GM706-E/PT - 16-bit 70 MIPS DSC 256KB Flash | Microchip
MPN: DSPIC33EP256GM706-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.35 | $7.35 |
| 10 | $7.05 | $70.50 |
| 100 | $6.75 | $675.00 |
| 500 | $6.5 | $3,250.00 |
| 1,000 | $6.2 | $6,200.00 |
DSPIC33EP256GM706-E/PT Overview
A digital signal controller combines a microcontroller (MCU) with digital signal processor (DSP) capability in a single Harvard-architecture core. In the system hierarchy, the DSC sits above general-purpose MCUs and beside dedicated DSPs, offering deterministic interrupt handling, hardware multiply-accumulate (MAC) and divide units, plus standard embedded peripherals, making the dsPIC33E family a bridge between control and signal processing in a power management IC ecosystem.
Key features of the GM706 variant include integrated analog: four on-chip operational amplifiers for motor-control current sensing, dual quadrature encoder interface (QEI) modules for position feedback, 8 input capture and 8 output compare channels, CAN bus connectivity for industrial and automotive networks, and motor-control (MC) PWM peripherals. These make the part a single-chip solution for field-oriented control (FOC) of PMSM and BLDC motors.
Technically, the dsPIC33EP core executes most instructions in a single cycle at 3.3V, with DSP instructions operating on 40-bit accumulators. The CMOS process, extended-temperature E-grade qualification, and AEC-Q100 automotive screening allow deployment in harsh underhood and factory environments. Flash self-programming supports field firmware updates, and 3.0V to 3.6V supply operation aligns with standard 3.3V industrial rails.
Typical applications include precision motor control (servo drives, robotics, e-mobility auxiliaries), industrial automation with CAN networking, digital power supplies, and sensor signal conditioning that exploits the four integrated op-amps to reduce external component count.
Design consideration: budget the 3.3V rail carefully - at 70 MIPS the core current draw is significant, so use a low-ESR bulk capacitor plus 0.1 uF decoupling at each VDD/VSS pair, and verify Flash endurance limits if you plan frequent in-field reprogramming.
This page synthesizes distributor pricing, drop-in alternatives within the dsPIC33EP family, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33EP256GM706-E/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 DSPIC33EP256GM706-E/PT (same form factor and footprint) — differing in Package, Quadrature Encoder Interfaces, Max CPU Speed, Qualification, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256GM706-I/PT
✅ Drop-In✓ In Stock
$3.26 / Unit
View Datasheet →DSPIC33EP256GM606-E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128GM706-E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.72 / Unit
View Datasheet →DSPIC33EP128GM306-E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.15 / Unit
View Datasheet →DSPIC33EP256GM306-E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.3 / Unit
View Datasheet →DSPIC33EP256GM706-E/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC Harvard |
| Max CPU Speed | 70 MIPS |
| Program Memory (Flash) | 256 KB (85.5K x 24) |
| RAM | 16 KB |
| Supply Voltage Range | 3 V to 3.6 V |
| Operating Temperature | -40C to +125C (E grade) |
| Package | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Qualification | AEC-Q100 automotive |
| Input Capture / Output Compare | 8 / 8 |
| Quadrature Encoder Interfaces | 2 |
| On-chip Operational Amplifiers | 4 |
| Motor Control PWM | 12 MC channels |
| Packaging | Tray |
DSPIC33EP256GM706-E/PT 64-tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for DSPIC33EP256GM706-E/PT (64-tqfp (10x10 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 DSPIC33EP256GM706-E/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP256GM706-E/PT is suitable for 6 applications: Precision Motor Control (FOC Servo Drives), Automotive Auxiliary Motor Control, Industrial Automation and CAN Networking Nodes, Digital Power Supplies and Inverters, Sensor Signal Conditioning and Data Acquisition, Robotics and E-mobility Motion Systems.
Precision Motor Control (FOC Servo Drives)
The DSPIC33EP256GM706-E/PT is a single-chip solution for field-oriented control of PMSM and BLDC motors: its 70 MIPS DSP core executes the current, speed, and position loops at tens of kHz, 12 motor-control PWM channels drive a three-phase inverter with dead-time and fault protection, 4 on-chip op-amps amplify low-side shunt currents, and 2 QEI modules read incremental encoders directly. Because all sensing, control, and PWM generation stays on-chip, loop latency is deterministic and board BOM shrinks by eliminating external amplifiers. In a typical 48V servo axis, the DSC sits between the gate-driver inputs and the encoder outputs; unlike a generic MCU plus external DSP, it adds no inter-chip communication delay, but verify PWM fault lockout timing against your inverter dead-time budget.
Recommended
Automotive Auxiliary Motor Control
With AEC-Q100 qualification and -40C to +125C E-grade temperature range, the DSPIC33EP256GM706-E/PT targets automotive subsystems such as HVAC blowers, electric water pumps, throttle actuators, and radiator-fan modules. The 64-TQFP survives underhood-adjacent thermal profiles that defeat industrial-grade (+85C) parts, while the integrated CAN interface connects the node to the vehicle bus without an external CAN controller. Firmware uses the same 256 KB Flash for control loops plus J1939/UDS-style diagnostics and flash-resident bootloaders for field updates. Designers should derate the +125C limit for self-heating at 70 MIPS operation and confirm the E-grade qualification certificate from Microchip for the specific program PPAP requirements; pair with an automotive-graded CAN transceiver and a load-dump-protected 3.3V supply.
Recommended
Industrial Automation and CAN Networking Nodes
In factory automation, the DSPIC33EP256GM706-E/PT serves as an intelligent actuator or sensor node: the CAN interface links PLC networks, 8 input-capture and 8 output-compare channels handle timing-critical I/O, and 2 QEI modules decode shaft encoders on conveyors or rotary tables. The 256 KB Flash accommodates protocol stacks, state machines, and OTA-style field upgrades via flash self-programming. The four op-amps condition analog sensor signals (pressure, current, position) before the ADC, trimming external signal-chain cost. Compared with a plain PIC16/PIC18 MCU, the DSP engine executes filtering and FFT-based diagnostics (bearing vibration analysis) on-node. A typical node uses a 24V backplane stepped down to 3.3V; place bulk and 0.1 uF decoupling at each VDD pin to ride through motor-driven supply dips.
Recommended
Digital Power Supplies and Inverters
Switching power converters need fast, deterministic control loops - the 70 MIPS core with single-cycle MAC executes compensator math and duty-cycle updates within one PWM period at 100-500 kHz switching frequencies. The 12 motor-control PWM channels configure as complementary pairs with dead-time for half-bridges in LLC, totem-pole PFC, or solar micro-inverter stages, while input-capture channels measure current-sensor edges for cycle-by-cycle protection. The E-grade temperature range suits fanless industrial power electronics. Design consideration: the 3.3V controller rail must be isolated or referenced correctly in off-line designs - use digital isolators or optocouplers on PWM/PFC feedback lines, and keep the dsPIC ground plane separate from the power stage until a single-point star ground. Firmware-based control also enables adaptive, load-dependent compensation impossible in fixed analog loops.
Recommended
Sensor Signal Conditioning and Data Acquisition
The four on-chip operational amplifiers differentiate the GM706 from lesser family members: they amplify bridge, thermocouple, or shunt signals in-silicon, cutting op-amp BOM cost and board area in multi-channel acquisition systems. The 16-bit DSP engine then applies FIR/IIR filtering, RMS computation, and FFT analysis at 70 MIPS - work that would swamp a conventional 8-bit MCU. Eight input-capture channels timestamp external events (flow-meter pulses, proximity switches), while 256 KB Flash stores calibration tables and long buffers. Typical products include vibration monitors, power-quality meters, and process transmitters on 3V-3.6V rails. Note the op-amps have fixed gain configurations defined by the peripheral architecture - verify gain ranges in the family datasheet against your sensor amplitude, and reserve headroom on the ADC reference for ratiometric measurements.
Recommended
Robotics and E-mobility Motion Systems
Multi-axis robots, AGVs, drones, and e-bike controllers benefit from the GM706's blend of dual QEI encoders, dual-CAN-class connectivity, and DSP-grade math: each QEI tracks a joint or wheel encoder, the op-amps read motor phase currents, and the 12-channel motor-control PWM drives two smaller motors or one three-phase axis. The -40C to +125C E-grade tolerates hot e-mobility enclosures, and the 64-TQFP 10x10 footprint fits dense motion-control boards. At 70 MIPS, kinematics, trajectory interpolation, and FOC torque loops coexist on one chip, replacing MCU-plus-DSP two-chip designs. Thermal planning matters: sustained 70 MIPS operation plus I/O current raises junction temperature - estimate dissipation from the datasheet ICC curves at your clock configuration and provide at least 2x2 cm of copper pour under the TQFP thermal pattern.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP256GM706-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256GM706-I/PT | DSPIC33EP256GM606-E/PT | DSPIC33EP128GM706-E/PT | DSPIC33EP128GM306-E/PT |
|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm), PT | 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 |
| Flash Program Memory | 256 KB (85.5K x 24) | 256 KB | 256 KB | 128 KB | 128 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Max CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Temperature Range | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +125C (E grade) |
| AEC-Q100 Automotive | Qualified | Not qualified (industrial) | Qualified | Qualified | Qualified |
| CAN Support | Yes (enhanced GM706 set) | Yes (identical) | Yes (fewer modules) | Yes (identical) | Yes (fewer modules) |
Key Differentiators
- Extended temperature and automotive qualification (vs DSPIC33EP256GM706-I/PT)
- Maximum Flash in the same footprint (vs DSPIC33EP128GM706-E/PT)
- Full GM706 peripheral set (vs DSPIC33EP256GM606-E/PT)
- Trade-off: highest cost in family tier (vs DSPIC33EP128GM306-E/PT)
Design Notes
Supply the DSPIC33EP256GM706-E/PT from a regulated 3.0V-3.6V rail (3.3V nominal). Fit the mandatory VCAP capacitor on the internal 2.5V core regulator output exactly as specified in the family datasheet - omitting it is the most common cause of erratic reset behavior on dsPIC33EP designs. At 70 MIPS, ICC scales with clock, so estimate current from the datasheet ICC-vs-MIPS curve and size the 3.3V LDO with margin for I/O switching current on 12 PWM outputs.
Place 0.1 uF ceramic decoupling at every VDD/VSS pin pair with the shortest possible return path to the ground plane, plus one 4.7-10 uF bulk capacitor near the device. Route the four op-amp inputs as short as possible and guard them against PWM switching noise - in motor-drive boards, keep analog ground under the op-amps/ADC separate from the power-stage ground, joining at a single star point. Verified footprints for the 64-TQFP (10x10, 0.8 mm pitch) are available from SnapEDA for Altium, KiCad, and Eagle.
Match the temperature-grade suffix to your environment: the -E/PT (this part) is required above +85C ambient and for AEC-Q100 automotive builds, while the cheaper DSPIC33EP256GM706-I/PT is fine only to +85C. Do not exceed the 3.6V absolute supply limit - 5V-tolerant claims apply only to specific digital pins per the datasheet. When substituting flash-reduced variants (128GM706, 128GM306), re-verify peripheral counts (op-amps, CAN) because GM306 silicon is a subset of GM706 despite the identical footprint.
Compliance Information
AEC-Q100 automotive qualification and 3.3V automotive grading confirmed by Microchip product page and datasheets.com listing. RoHS/REACH/lead-free status not stated in provided data - verify on Microchip's official product page.
