DSPIC33FJ64MC706AT-I/PT - 16-bit 40MIPS DSC 64KB Flash | Microchip
MPN: DSPIC33FJ64MC706AT-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.45 | $7.45 |
| 10 | $6.9 | $69.00 |
| 100 | $6.65 | $665.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.85 | $5,850.00 |
DSPIC33FJ64MC706AT-I/PT Overview
A digital signal controller combines the computational architecture of a DSP with the peripheral set and ease of use of a microcontroller. Within the power-management hierarchy of embedded systems, the DSC sits between general-purpose MCUs and dedicated DSPs: it executes deterministic control loops (such as field-oriented motor control) while simultaneously handling communication, timing, and analog acquisition tasks on a single chip. The dsPIC33F family from Microchip Technology is a widely adopted 16-bit DSC platform for these mixed control-plus-connectivity designs.
Key features of this device include the 40 MIPS dsPIC33F core with DSP engine and barrel shifter, 16KB of on-chip SRAM, 8-channel DMA controller, and 11 timers. Analog capability is provided by a 16-channel, 10-bit/12-bit ADC supporting high-rate simultaneous sampling - essential for current and voltage sensing in motor drives. Five external interrupt sources and multiple serial ports round out the I/O capability.
The MC706 variant belongs to the motor-control (MC) subfamily, which integrates motor-control PWM peripherals suited to inverter and converter control. The CMOS process with low-power modes (Idle and Sleep) allows battery-powered and thermally constrained designs to reduce average current draw while retaining fast wake-up for real-time control loops.
Typical applications include three-phase motor control (BLDC, PMSM, AC induction), digital power supplies and solar inverters, and industrial automation nodes that need deterministic control loops alongside serial communication. The 3.0V to 3.6V supply range matches standard 3.3V industrial rails.
When designing with this device, budget the 16KB RAM carefully - control-loop state, DMA buffers, and communication stacks must share it; larger buffer requirements may favor the 128KB Flash variants of the same package. The industrial temperature rating (-40C to +85C) and RoHS3 compliance simplify qualification for factory environments.
This page synthesizes distributor pricing, drop-in same-package alternatives, design notes, and application guidance not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ64MC706AT-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 DSPIC33FJ64MC706AT-I/PT (same form factor and footprint) — differing in Package, RoHS Status, Core Architecture, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ64MC506A-I/PT
✅ Drop-In✓ In Stock
$7.58 / Unit
View Datasheet →DSPIC33FJ64MC506-I/PT
✅ Drop-In✓ In Stock
$5.3 / Unit
View Datasheet →DSPIC33FJ64MC510AT-I/PT
✅ Drop-In✓ In Stock
$4.85 / Unit
View Datasheet →DSPIC33FJ128MC706AT-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$8.15 / Unit
View Datasheet →DSPIC33FJ256MC706AT-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64MC706A-E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64MC706AT-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F |
| Maximum Speed | 40 MIPS |
| Program Memory (Flash) | 64KB (64K x 8) |
| RAM Size | 16KB (16K x 8) |
| Supply Voltage | 3.0 V to 3.6 V |
| ADC Resolution | 10-bit / 12-bit |
| ADC Channels | 16 |
| General-Purpose I/O | 53 pins |
| Timers | 11 |
| DMA Channels | 8 |
| Serial Ports | 4 |
| External Interrupt Sources | 5 |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Process Technology | CMOS |
| Low-Power Modes | Idle, Sleep |
| RoHS Status | RoHS3 Compliant |
DSPIC33FJ64MC706AT-I/PT 64-tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for DSPIC33FJ64MC706AT-I/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 DSPIC33FJ64MC706AT-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ64MC706AT-I/PT is suitable for 6 applications: BLDC / PMSM Motor Control, Digital Power Supplies and Inverters, Industrial Automation Nodes, Sensor Signal Acquisition Systems, Audio and Speech Processing, Embedded Control with Serial Connectivity.
BLDC / PMSM Motor Control
The DSPIC33FJ64MC706AT-I/PT fits motor control because its 40 MIPS DSP core executes field-oriented control (FOC) loops at tens of kilohertz while the 16-channel 10/12-bit ADC samples phase currents simultaneously - a prerequisite for stable current controllers. Motor-control PWM peripherals generate complementary outputs with dead-time insertion for three-phase inverters. In use, the ADC is triggered by the PWM boundary to sample bus voltage and phase currents deterministically, with 8 DMA channels moving samples to RAM without CPU load. The main trade-off versus higher-end dsPIC33EP parts is 16KB RAM, which bounds the size of observer/state data but is ample for classic FOC and sensorless estimators at one or two motor axes.
Recommended
Digital Power Supplies and Inverters
Digital SMPS and solar-inverter control demand deterministic, high-rate voltage/current loops, and the MC706AT aligns well: the 40 MIPS core closes compensator loops at switching frequencies common in telecom and solar converters, while the 10/12-bit ADC and motor-control PWM provide the sense-and-drive path. The 8-channel DMA keeps sampling overhead near zero, so CPU cycles remain for soft-start, mode management, and protection routines. Compared with dedicated digital-power parts (dsPIC33FJ64GS610), the MC706AT lacks the highest-resolution PWM but offers a broader general-purpose peripheral mix. Design consideration: keep the control ISR under a few microseconds to preserve loop bandwidth at 40 MIPS.
Recommended
Industrial Automation Nodes
Factory automation nodes combine real-time sensing, actuation, and communication - a profile matched by the MC706AT's 53 GPIO, 11 timers, 4 serial ports, and 5 external interrupt sources. Typical deployments include conveyor sub-controllers, sensor aggregation, and actuator drivers where the 40 MIPS core handles both protocol stacks and local control. The industrial -40C to +85C rating covers unconditioned cabinet environments, and low-power Idle/Sleep modes reduce average draw in intermittently active nodes. The 3.0V to 3.6V supply range connects directly to standard 3.3V industrial rails. Trade-off: 64KB Flash bounds the combined application plus bootloader; reserve several KB for in-field firmware update code.
Recommended
Sensor Signal Acquisition Systems
Multi-channel acquisition systems benefit from the MC706AT's 16-channel 10/12-bit ADC combined with DMA: up to 16 sensor inputs can be scanned and buffered into the 16KB SRAM with no CPU intervention between conversions, while the DSP engine applies filtering (FIR/IIR) on the same core that manages serial upload through the 4 serial ports. This suits vibration monitors, strain-gauge bridges (with external instrumentation front ends), and process sensors in industrial equipment. Performance consideration: the 12-bit mode trades conversion speed for resolution - verify the ADC sample-rate budget in 12-bit mode against your signal bandwidth before fixing the architecture.
Recommended
Audio and Speech Processing
The dsPIC33F DSP engine (single-cycle MAC, barrel shifter) makes the MC706AT effective for speech-band audio: echo cancellation, compression, and tone control at 8-48 kHz sample rates fit within the 40 MIPS budget. The ADC captures microphone or line inputs and PWM/DAC-class peripherals handle output, while DMA streams buffers through the 16KB SRAM. For higher-fidelity applications, the part pairs with external audio codecs over its serial ports. The trade-off versus a general DSP is modest RAM - long-delay effects or multi-band codecs must use compact buffer schemes. This application suits intercoms, PA controllers, and speech-enhancement front ends rather than studio-grade processing.
Recommended
Embedded Control with Serial Connectivity
Many embedded designs need one chip that closes a control loop and talks to a host. The MC706AT provides 4 serial ports plus 5 external interrupts, allowing simultaneous links (for example UART to a host, SPI to flash or sensors, and a second UART to a display) while the 40 MIPS core runs application logic. This fits gateways, test fixtures, and instrument sub-systems where deterministic local behavior matters more than raw connectivity count. Bootloader-based field updates fit within the 64KB Flash if budgeted early. Design tip: map serial pin assignments in the PPS (peripheral pin select) stage of layout review, since remapping after PCB release forces redesign.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ64MC706AT-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ64MC506A-I/PT | DSPIC33FJ64MC506-I/PT | DSPIC33FJ64MC510AT-I/PT | DSPIC33FJ128MC706AT-I/PT | DSPIC33FJ256MC706AT-I/PT | DSPIC33FJ64MC706A-E/PT |
|---|---|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same footprint | 64-TQFP (10x10 mm) - same footprint | 64-TQFP (10x10 mm) - same footprint | 64-TQFP (10x10 mm) - same footprint | 64-TQFP (10x10 mm) - same footprint | 64-TQFP (10x10 mm) - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Flash Memory | 64KB | 64KB | 64KB | 64KB | 128KB | 256KB | 64KB |
| RAM | 16KB | 16KB | 16KB | 16KB | 16KB | 16KB | 16KB |
| 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 | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) |
| ADC | 16-ch 10/12-bit | 16-ch 10/12-bit | 16-ch 10/12-bit | 32-ch 10/12-bit | 16-ch 10/12-bit | 16-ch 10/12-bit | 16-ch 10/12-bit |
Key Differentiators
- Balanced 64KB Flash / 16KB RAM in compact 64-TQFP (vs DSPIC33FJ128MC706AT-I/PT)
- Extended-temperature option in identical footprint (vs DSPIC33FJ64MC706A-E/PT)
- Newer A-step silicon (vs DSPIC33FJ64MC506-I/PT)
- Motor-control peripheral focus (vs DSPIC33FJ64GP708A-I/PT)
Design Notes
Supply the MC706AT from a regulated 3.3V rail that stays within the 3.0V to 3.6V window under all load transients. Decouple each VDD pin with 0.1uF ceramic capacitors placed within 2-3 mm of the pin, plus one bulk 4.7-10uF capacitor near the device. During Flash programming/erase the core draws transient current spikes; an undersupplied rail can trigger brownout reset mid-write. Follow Microchip's dsPIC33F power-supply layout guidance in the family reference manual.
The 64-TQFP (0.5 mm pitch) requires solder-mask-defined or non-solder-mask-defined pads per IPC recommendations; use the Microchip-supplied footprint. Place the 0.1uF VDD decoupling caps on the component side directly beneath the package perimeter. Keep the ADC reference (VREF+/AVDD) routed as a quiet star from a ferrite-bead-filtered 3.3V, separate from digital VDD, to preserve 12-bit ADC accuracy. Avoid routing PWM outputs adjacent to analog sense lines to prevent switching coupling into current measurements.
Two frequent mistakes: (1) exhausting the 16KB RAM - DMA buffers, stack, and control state share it; generate a map file early and leave 20% headroom for later firmware growth. (2) Ignoring the peripheral pin select (PPS) mapping - serial and other peripherals must be assigned in firmware before pins function; verify the mapping against your PCB netlist before release. Also confirm the -I suffix matches your temperature environment; the -E variant covers +125C.
Motor-control PWM edges switch quickly at 3.3V; add series resistors (22-33 ohm) on long traces to gate drivers to control ringing, and keep gate-driver return paths short to the DSC ground. For ADC sense lines, guard with ground pour and route away from PWM nets. Estimated: at 40 MIPS the core clock is 40 MHz - keep crystal or internal oscillator layout per the oscillator section of the family datasheet, with the crystal ground guard connected directly to the nearest VSS pin.
Compliance Information
ROHS3 Compliant per distributor data (ics-embedded). AEC-Q100 qualification not stated in provided data.
