DSPIC33FJ128GP306AT-I/MR - 16-bit 40MIPS DSC 128KB Flash | Microchip
MPN: DSPIC33FJ128GP306AT-I/MR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.12 | $6.12 |
| 10 | $5.75 | $57.50 |
| 100 | $5.38 | $538.00 |
| 500 | $4.95 | $2,475.00 |
| 1,000 | $4.62 | $4,620.00 |
DSPIC33FJ128GP306AT-I/MR Overview
A digital signal controller combines the computing model of a microcontroller with the numeric throughput of a DSP core. In the embedded-systems hierarchy, the dsPIC33F family sits between general-purpose PIC24 MCUs and dedicated DSPs, offering multiply-accumulate (MAC) instructions, a barrel shifter, and multiple internal buses while retaining conventional MCU peripherals such as timers, UARTs, and GPIO. This makes DSCs the natural choice for closed-loop control applications that also require fast numeric processing.
Key features of this part include a 16-bit fixed-point core with DSP instruction extensions, 53 general-purpose I/O pins, an 18-channel 10-bit/12-bit analog-to-digital converter, and industrial temperature operation from -40C to +85C at a 3.0V to 3.6V supply. The 40 MIPs instruction rate supports real-time control loops at tens of kHz.
Architecturally, the dsPIC33FJ128GP306 uses a modified Harvard bus structure with separate program and data paths, hardware loop support, and dual fetch of operands for single-cycle MAC operations. Seamless migration options exist toward PIC24 MCUs and dsPIC30F DSCs in similar packages, protecting long-term designs.
Typical applications include motor control (BLDC, PMSM, FOC), digital power supplies and PFC stages, industrial automation sensors, and audio or general-purpose signal conditioning where the 10/12-bit ADC channels feed control algorithms.
Design-wise, all VDD and VSS pins must be connected for reliable operation and programming; multiple PGECx/PGEDx ICSP pairs exist and must be used as matched pairs per the programming specification.
This page synthesizes distributor pricing, drop-in alternatives, pinout guidance, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ128GP306AT-I/MR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ128GP306A-I/MR
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128GP306AT-E/MR
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ128GP306-I/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ128GP306-E/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GP306AT-I/MR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ128GP306AT-I/MR Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F DSC |
| Max CPU Speed | 40 MIPS (40 MHz) |
| Program Memory | 128 KB (128K x 8) Flash |
| RAM Size | 16 KB (16K x 8) |
| Operating Voltage | 3.0 V to 3.6 V |
| General Purpose I/O | 53 I/O |
| ADC Resolution | 10-bit / 12-bit |
| ADC Channels | 18 channels |
| Package | 64-VQFN (9x9 mm), exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Packaging | Tape & Reel (TR) |
| DSP Features | Barrel shifter, single-cycle MAC, boundary scan |
| Temperature Qualification | AEC-Q100 qualified variant available (DSPIC33FJ128GP306AT-E/MR) |
| Programming Interface | ICSP (multiple PGECx/PGEDx pairs) |
DSPIC33FJ128GP306AT-I/MR Pin Configuration
| Pin 1 | VDD — Power supply (3.0V to 3.6V) |
| Pin 2 | AN0/VREF+/CN2/RB0 — Analog input 0 / positive voltage reference |
| Pin 3 | AN1/VREF-/CN3/RB1 — Analog input 1 / negative voltage reference |
| Pin 4 | AN2/SS1/LVDIN/CN4/RB2 — Analog input 2 / SPI slave select 1 |
| Pin 5 | AN3/INDX/CN5/RB3 — Analog input 3 / encoder index |
| Pin 6 | AN4/QEA/IC7/CN6/RB4 — Analog input 4 / encoder phase A / capture 7 |
| Pin 7 | AN5/QEB/IC8/CN7/RB5 — Analog input 5 / encoder phase B / capture 8 |
| Pin 8 | AN6/OCFA/RB6 — Analog input 6 / output-compare fault A |
| Pin 9 | AN7/RB7 — Analog input 7 |
| Pin 10 | VSS — Ground |
| Pin 11 | OSC1/CLKI/RC12 — Oscillator input / external clock |
| Pin 12 | OSC2/CLKO/RC15 — Oscillator output / clock output |
| Pin 13 | VDD — Power supply |
| Pin 14 | SOSCI/T2CK/RC13 — Secondary oscillator input / Timer2 clock |
| Pin 15 | SOSCO/T1CK/CN0/RC14 — Secondary oscillator output / Timer1 clock |
| Pin 16 | MCLR — Master clear (reset) / programming voltage |
| Pin 17 | AN8/T5CK/RB8 — Analog input 8 / Timer5 clock |
| Pin 18 | AN9/T3CK/RB9 — Analog input 9 / Timer3 clock |
| Pin 19 | AN10/TXCK/RB10 — Analog input 10 / CAN transmit clock |
| Pin 20 | AN11/RXCK/RB11 — Analog input 11 / CAN receive clock |
| Pin 21 | AN12/SCK2/RB12 — Analog input 12 / SPI2 clock |
| Pin 22 | AN13/SDO2/RB13 — Analog input 13 / SPI2 data out |
| Pin 23 | AN14/SDI2/RB14 — Analog input 14 / SPI2 data in |
| Pin 24 | AN15/SS2/RB15 — Analog input 15 / SPI2 slave select |
| Pin 25 | VSS — Ground |
| Pin 26 | VDD — Power supply |
| Pin 27 | PGED3/PMA0/EMUD3/RG0 — ICSP data 3 / parallel master address 0 |
| Pin 28 | PGEC3/PMA1/EMUC3/RG1 — ICSP clock 3 / parallel master address 1 |
| Pin 29 | PMA2/RG2 — Parallel master address 2 |
| Pin 30 | PMA3/RG3 — Parallel master address 3 |
| Pin 31 | PMA4/RG4 — Parallel master address 4 |
| Pin 32 | PMA5/RG5 — Parallel master address 5 |
| Pin 33 | SDO1/EMDC/RP44/RF6 — SPI1 data out / remappable pin RP44 |
| Pin 34 | SCK1/EMDIO/RP45/RF7 — SPI1 clock / remappable pin RP45 |
| Pin 35 | U1TX/RP46/RF8 — UART1 transmit / remappable pin RP46 |
| Pin 36 | U1RX/RP47/RF9 — UART1 receive / remappable pin RP47 |
| Pin 37 | SDI1/RP48/RF10 — SPI1 data in / remappable pin RP48 |
| Pin 38 | RP49/RF11 — Remappable peripheral pin RP49 |
| Pin 39 | RP50/RF12 — Remappable peripheral pin RP50 |
| Pin 40 | RP51/RF13 — Remappable peripheral pin RP51 |
| Pin 41 | SDI2/RP52/RF2 — SPI2 data in / remappable pin RP52 |
| Pin 42 | RP53/RF3 — Remappable peripheral pin RP53 |
| Pin 43 | C2RX/RP54 — ECAN2 receive / remappable pin RP54 |
| Pin 44 | C1TX/RP55 — ECAN1 transmit / remappable pin RP55 |
| Pin 45 | VSS — Ground |
| Pin 46 | VDD — Power supply |
| Pin 47 | TDI/RP56 — JTAG data in / remappable pin RP56 |
| Pin 48 | TDO/RP57 — JTAG data out / remappable pin RP57 |
| Pin 49 | TMS/RP58 — JTAG mode select / remappable pin RP58 |
| Pin 50 | TCK/RP59 — JTAG clock / remappable pin RP59 |
| Pin 51 | PMD0/RE0 — Parallel master data 0 |
| Pin 52 | PMD1/RE1 — Parallel master data 1 |
| Pin 53 | PMD2/RE2 — Parallel master data 2 |
| Pin 54 | PMD3/RE3 — Parallel master data 3 |
| Pin 55 | PMD4/RE4 — Parallel master data 4 |
| Pin 56 | PMD5/RE5 — Parallel master data 5 |
| Pin 57 | PMD6/RE6 — Parallel master data 6 |
| Pin 58 | PMD7/RE7 — Parallel master data 7 |
| Pin 59 | PMRD/PMWR/RE8 — Parallel master read/write strobe |
| Pin 60 | PMCS1/RE9 — Parallel master chip select 1 |
| Pin 61 | PMA15/RC1 — Parallel master address 15 |
| Pin 62 | PMA14/RC2 — Parallel master address 14 |
| Pin 63 | AVDD — Analog power supply |
| Pin 64 | AVSS — Analog ground |
Typical Applications
DSPIC33FJ128GP306AT-I/MR is suitable for 6 applications: BLDC / PMSM Motor Control, Digital Power Supplies and PFC, Industrial Automation and Sensing, Audio Signal Processing, Embedded Control and IoT Nodes, Test and Measurement Instrumentation.
BLDC / PMSM Motor Control
The DSPIC33FJ128GP306AT-I/MR fits sensorless and sensored motor drives because its 40 MIPS 16-bit DSP core executes field-oriented control (FOC) at loop rates of 10-20 kHz with single-cycle MAC operations. The 18-channel 10/12-bit ADC samples multiple phase currents and the DC bus within one PWM period, and PWM outputs drive a three-phase inverter through gate drivers. Placed between the current-sense op-amps and the gate-driver stage, the DSC replaces analog control loops with digital compensation, improving efficiency and enabling field weakening. The 53 GPIO also handle hall-sensor inputs, encoder quadrature signals, and fault protection, consolidating the complete drive controller into one 64-pin VQFN package.
Recommended
Digital Power Supplies and PFC
For switch-mode power supplies, LLC converters, and power-factor-correction stages, the DSPIC33FJ128GP306AT-I/MR offers the fast ADC (10/12-bit, 18 channels) and 40 MIPS throughput required for voltage- and current-mode digital control at switching frequencies of 100-500 kHz with cycle-by-cycle current limiting. The controller reads output voltage and inductor current through the ADC, executes the compensation loop in DSP-optimized code, and updates PWM duty via high-resolution PWM peripherals. Compared with fixed-function analog controllers, this DSC enables adaptive dead-time, soft-start sequencing, and telemetry over UART/CAN. Its 3.0-3.6V supply and industrial -40C to +85C rating match typical AC/DC and DC/DC power environments.
Recommended
Industrial Automation and Sensing
In factory automation nodes, the DSPIC33FJ128GP306AT-I/MR acts as the local intelligence for sensor conditioning, actuator control, and field-bus communication. The 18-channel ADC digitizes pressure, temperature, and bridge-sensor outputs; the DSP barrel shifter and MAC accelerate filtering and FFT-based diagnostics; and 53 GPIO drive relays, indicator LEDs, and optocoupled I/O. UART and SPI peripherals interface to RS-485 transceivers or industrial Ethernet gateways, while 128 KB Flash stores both the application and a protocol stack with room for field firmware updates. The -40C to +85C industrial temperature range and 3.0-3.6V supply fit standard 24V-panel-powered designs through a 3.3V regulator.
Recommended
Audio Signal Processing
The DSPIC33FJ128GP306AT-I/MR serves embedded audio products such as active speakers, mixers, and acoustic processors. Its 40 MIPS core with DSP multiply-accumulate instructions implements biquad IIR filters, dynamic range compression, and acoustic echo cancellation on 16-bit audio streams. The 10/12-bit ADC captures control voltages and microphone signals, while SPI connects to external audio codecs for higher-fidelity conversion. With 128 KB Flash, developers store multiple preset banks and a parameter-control protocol alongside the processing code, and the 16 KB RAM buffers audio frames with headroom. The 64-pin VQFN 9x9 mm package integrates the complete processing engine into compact consumer or pro-audio hardware.
Recommended
Embedded Control and IoT Nodes
As a general-purpose embedded controller, the DSPIC33FJ128GP306AT-I/MR consolidates sensing, control, and communication in IoT and connected-device nodes. The 53 GPIO handle button matrices, display interfaces, and peripheral chip-selects; UART/SPI/I2C links to wireless modules and sensors; and the DSP engine performs local analytics such as RMS computation and threshold detection before transmitting results. The 128 KB Flash accommodates a full application plus an OTA-update bootloader, and self-programmable Flash enables field firmware upgrades. ICSP programming through any PGECx/PGEDx pair supports in-circuit production flashing, while the 3.0-3.6V rail directly matches common 3.3V system supplies.
Recommended
Test and Measurement Instrumentation
In handheld meters, dataloggers, and bench instruments, the DSPIC33FJ128GP306AT-I/MR provides the processing backbone for measurement sequencing and computation. The 18-channel 10/12-bit ADC multiplexes multiple measurement inputs; DSP instructions compute RMS, power factor, and harmonic content in real time at 40 MIPS; and boundary-scan support (JTAG) assists board-level diagnostics during production test. The 128 KB Flash and 16 KB RAM store calibration tables, logging buffers, and a menu-driven UI stack, while the 53 GPIO drive keypads and segment or dot-matrix displays. The industrial temperature rating and 9x9 mm VQFN package suit both portable battery-powered and rack-mounted instrument designs.
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Recommended Products Summary
Engineering reference data for DSPIC33FJ128GP306AT-I/MR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ128GP306A-I/MR | DSPIC33FJ128GP306AT-E/MR | DSPIC33FJ64GP306AT-I/MR |
|---|---|---|---|---|
| Package | 64-VQFN (MR) 9x9 mm | 64-VQFN (MR) - same | 64-VQFN (MR) - same | 64-VQFN (MR) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 40 MIPS | 40 MHz | 40 MHz | 40 MIPS |
| Program Memory (Flash) | 128 KB | 128 KB | 128 KB | 64 KB |
| RAM | 16 KB | 16 KB | 16 KB | 16 KB |
| 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 |
| Operating Temperature | -40C to +85C (I) | -40C to +85C | -40C to +125C (AEC-Q100) | -40C to +85C |
| GPIO Count | 53 I/O | 53 I/O | 53 I/O | 53 I/O |
Key Differentiators
- Large memory in mid-range package (vs DSPIC33FJ64GP306AT-I/MR)
- Industrial cost optimization (vs DSPIC33FJ128GP306AT-E/MR)
- Same footprint with enhanced die (vs DSPIC33FJ128GP306A-I/MR)
Design Notes
All VDD and VSS pins must be connected, and AVDD/AVSS must also be powered for the ADC to function. Per Microchip programming guidance, multiple PGECx/PGEDx ICSP pairs exist on this device - you must use any pair as a matched pair (e.g., if PGEC2 is used for ICSPCLK, PGED2 must carry ICSPDAT). Leaving even one power or programming pin unconnected can cause programming failure or erratic operation. Plan the programming connector early in layout.
Estimated: with a 3.3V rail and typical dsPIC33F active currents on the order of tens of mA at 40 MIPS, power dissipation remains below ~0.2 W, so the 9x9 mm VQFN exposed pad needs no heatsink; however, solder the exposed thermal pad to a ground pour array of vias for the best thermal and ground integrity. Decouple every VDD pin with 0.1 uF ceramics placed within 2-3 mm, plus one bulk 4.7-10 uF capacitor, and isolate AVDD through an RC filter (e.g., 10 ohm + 1 uF) for ADC noise performance.
Keep the oscillator traces (OSC1/OSC2, SOSCI/SOSCO) short and guard them with ground. For EMC, route the PGD/PGC programming pins to a header even in production boards - in-field firmware updates rely on ICSP. Remappable RPxx pins allow peripheral placement after routing, which simplifies late layout changes; assign UART/SPI/PWM functions in software rather than forcing the PCB to fixed peripheral pins.
Verify junction temperature for extended-ambient enclosures: with an estimated theta_JA in the 30-40 C/W range for a well-soldered VQFN-64 exposed pad, a 0.2 W dissipation yields roughly a 6-8 C junction rise over ambient - well within the -40C to +85C industrial rating. Recheck with the datasheet theta_JA table if the board uses minimal copper or the enclosure is sealed.
Compliance Information
The -I target part is the industrial temperature grade; AEC-Q100 (TS 16949) qualification applies to the -E variant (DSPIC33FJ128GP306AT-E/MR) per Microchip USA data. RoHS/REACH status for this specific MPN was not stated in the provided data.
