DSPIC33EP128GM306T-I/PT - 70 MIPS 16-bit DSC 128KB Flash | Microchip
MPN: DSPIC33EP128GM306T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.54 | $6.54 |
| 10 | $5.92 | $59.20 |
| 100 | $5.38 | $538.00 |
| 500 | $4.85 | $2,425.00 |
| 1,000 | $4.42 | $4,420.00 |
DSPIC33EP128GM306T-I/PT Overview
A digital signal controller combines the computational throughput of a DSP with the peripheral integration and control architecture of a microcontroller, occupying the middle of the embedded hierarchy between general-purpose MCUs and dedicated DSPs. The dsPIC33EP family extends this concept with an enhanced DMA controller and motor-control-specific peripherals, making the DSC class the preferred choice for closed-loop control systems such as field-oriented motor control and digital power conversion.
Key features include 12 channels of Motor Control PWM (MCPWM), 8 input capture and 8 output compare channels, 2 quadrature encoder interfaces (QEI), 4 integrated operational amplifiers, a Charge Time Measurement Unit (CTMU) for capacitive touch and precision timing, and a Peripheral Trigger Generator (PTG) for autonomous task scheduling.
Architecturally, the device pairs the dsPIC 16-bit core with a two-cycle MAC, DSP instruction support, four DMA channels, and Peripheral Pin Select (PPS) that lets designers remap digital peripherals to available pins, maximizing layout flexibility on dense boards. The operating voltage range is 3.0V to 3.6V with a nominal 3.3V supply, and the -I suffix indicates an industrial operating temperature range.
Typical applications include precision PMSM and BLDC motor drives, digital power supplies (PFC, LLC), industrial automation, and audio/signal processing pipelines where hardware DSP multiply-accumulate and analog op-amps reduce external BOM count.
Design consideration: leverage the 4 on-chip op-amps with the 12-channel MCPWM to implement current-sensing feedback loops without external amplifiers, but budget careful analog layout with ground guarding around the op-amp pins.
This page synthesizes distributor pricing from LCSC and Microchip USA, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, as of 2026-09-23.
Drop-in alternatives for DSPIC33EP128GM306T-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 DSPIC33EP128GM306T-I/PT (same form factor and footprint) — differing in Operating Temperature, Package, Packaging, Input Capture / Output Compare, Quadrature Encoder Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP256GM306T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.72 / Unit
View Datasheet →DSPIC33EP128GM306-E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$6.15 / Unit
View Datasheet →DSPIC33EP128GM304T-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.95 / Unit
View Datasheet →DSPIC33EP128GM706T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128MC306T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128GM306T-I/PT Maximum Ratings & Electrical Characteristics
| Core Processor | dsPIC 33EP 16-bit |
| Maximum Performance | 70 MIPS |
| Program Memory (Flash) | 128KB (43K x 24) |
| RAM | 16KB |
| Supply Voltage | 3.0 V to 3.6 V (nominal 3.3 V) |
| MCPWM Channels | 12 (Motor Control PWM) |
| Input Capture / Output Compare | 8 / 8 |
| Quadrature Encoder Interfaces | 2 (QEI) |
| Operational Amplifiers | 4 (on-chip) |
| Charge Time Measurement Unit | Yes (CTMU) |
| Peripheral Trigger Generator | Yes (PTG) |
| Timers | 13 |
| DMA Channels | 4 |
| Package | 64-TQFP (10x10x1 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial, -I) |
| Packaging | Tape & Reel (T suffix) |
| Peripheral Pin Select | Yes (PPS remapping) |
DSPIC33EP128GM306T-I/PT 64-tqfp (10x10x1 mm) Pin Configuration Guide
Pin configuration for DSPIC33EP128GM306T-I/PT (64-tqfp (10x10x1 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 DSPIC33EP128GM306T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP128GM306T-I/PT is suitable for 6 applications: PMSM / BLDC Motor Drives, Digital Power Conversion, Industrial Automation and Motion Control, Sensor Signal Conditioning and Data Acquisition, Audio and Speech Processing, Embedded Control and IoT Nodes.
PMSM / BLDC Motor Drives
The DSPIC33EP128GM306T-I/PT is purpose-built for closed-loop field-oriented control (FOC) of PMSM and BLDC motors. Its 12 MCPWM channels generate complementary three-phase PWM with hardware dead-time insertion, while the 2 QEI modules read rotary encoder feedback at full speed without CPU loading. The 4 on-chip op-amps amplify low-level shunt-resistor current signals, eliminating external amplifier ICs and reducing BOM cost in drive inverters. At 70 MIPS with hardware MAC, the core executes current-loop FOC at 10-20 kHz update rates with headroom for supervisory logic. Pair with a three-phase gate driver and use the CTMU or ADC-trigger synchronization for precise current sampling aligned to PWM center.
Recommended
Digital Power Conversion
In digital power supplies (PFC, half-bridge, LLC), the DSPIC33EP128GM306T-I/PT provides high-resolution MCPWM outputs synchronized to ADC conversions of voltage and current loops. The 70 MIPS core with DSP multiply-accumulate runs proportional-integral compensators at switching frequencies up to several hundred kHz for buck-class topologies, while the PTG offloads periodic trigger generation from software. The 8 input capture channels measure duty and phase of external events, useful for synchronous rectification timing. Because the device runs from a single 3.3V rail, it interfaces directly with isolated feedback via digital isolators. Note the PWM resolution trade-off: verify high-resolution PWM requirements against the datasheet before committing to MHz-class converters.
Recommended
Industrial Automation and Motion Control
Factory automation nodes benefit from the DSPIC33EP128GM306T-I/PT's combination of 13 timers, 4 DMA channels, and Peripheral Pin Select, which allows UART, SPI, and PWM peripherals to be routed to optimal PCB locations. The dual QEI modules support two-axis motion tracking, and the 8 output compare channels generate precise timed events for valve, solenoid, or stepper sequencing. With 128KB Flash, a bootloader plus full control application fits with room for parameter logging in RAM. The industrial -40C to +85C temperature rating suits panel and cabinet installations. Use the CTMU for low-cost capacitive touch HMI interfaces directly on the control board without a separate touch controller.
Recommended
Sensor Signal Conditioning and Data Acquisition
The 4 on-chip operational amplifiers of the DSPIC33EP128GM306T-I/PT can be configured as programmable-gain amplifiers ahead of the ADCs, making it a compact front end for bridge sensors, current shunts, and microphone preamps. The CTMU supports precise time-interval and capacitance measurement for ultrasonic and touch sensing, while the PTG automates trigger sequences between ADC sampling and DMA transfers without CPU intervention. With 16KB RAM, a sliding-window FIR/IIR filter bank fits comfortably alongside application logic thanks to the hardware MAC. This reduces board area versus discrete amplifier plus MCU solutions in multi-channel acquisition nodes.
Recommended
Audio and Speech Processing
For embedded audio, the DSPIC33EP128GM306T-I/PT applies its DSP engine (single-cycle MAC, DSP addressing modes) to filtering, AGC, and acoustic echo tasks. The 8 input capture channels can time-stamp audio events for beamforming experiments, while DMA-driven SPI or UART links stream codec data without CPU stalls. On-chip op-amps provide inexpensive pre-amplification of electret microphones. The 70 MIPS budget supports sample-rate conversions and multiple cascaded biquad filters in real time at 16-48 kHz sampling. For production audio products, note this part lacks a dedicated audio codec interface, so an external codec over SPI/I2C is required.
Recommended
Embedded Control and IoT Nodes
As a general embedded controller, the DSPIC33EP128GM306T-I/PT offers 53 I/O-class digital pins with PPS remapping, multiple UART/SPI/I2C instances via remap, and 128KB Flash for protocol stacks. The dual-QEI and rich PWM set also make it a flexible node for robotics peripherals, actuators, and smart sensors bridging analog field signals to industrial networks. The single 3.3V supply simplifies integration with modern radios and level-compatible sensors. The CTMU-based touch interface enables button-free enclosures for washdown or sealed environments. Its active lifecycle status and multi-source distributor stock (DigiKey, Mouser, LCSC as of 2026-09-23) reduce long-term supply risk.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128GM306T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP256GM306T-I/PT | DSPIC33EP128GM306-E/PT | DSPIC33EP128GM304T-I/PT | DSPIC33EP128GM706T-I/PT |
|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 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 Memory | 128KB (43K x 24) | 256KB | 128KB | 128KB | 128KB |
| RAM | 16KB | 32KB | 16KB | 16KB | 16KB |
| Performance | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| 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 |
| Key Peripherals | 12 MCPWM, 8/8 IC/OC, 2 QEI, 4 op-amps, CTMU, PTG | Identical to GM306 | Identical to GM306 | Reduced instance count | GM7 peripheral mix |
| Lifecycle Status | Active | Active | Active | Active | Active |
Key Differentiators
- Integrated analog front end (vs DSPIC33EP128GM304T-I/PT)
- Memory headroom upgrade path (vs DSPIC33EP256GM306T-I/PT)
- Extended temperature option without respin (vs DSPIC33EP128GM306-E/PT)
Design Notes
Supply the DSPIC33EP128GM306T-I/PT from a clean 3.3V rail within the 3.0V-3.6V window. Place a 0.1uF ceramic capacitor at every VDD/VSS pin pair plus one 4.7uF-10uF bulk capacitor near the device. When running at 70 MIPS with all 12 MCPWM outputs switching, core current transients are fast; a local ferrite bead plus decoupling network prevents ground bounce from corrupting the analog op-amp and CTMU measurements. Estimated: with typical core current in the tens of mA range, IR drop across PCB traces is negligible, but ensure the regulator can handle peak startup and Flash-write currents per datasheet electrical characteristics.
Route the 4 on-chip op-amp inputs and their external shunt/bridge networks as short as possible with a guard ring connected to a quiet analog ground. Keep the PWM output traces away from analog routing to prevent coupling into ADC samples; where crossing is unavoidable, cross at 90 degrees on adjacent layers. The Peripheral Pin Select feature lets you position UART/SPI functions at the connector side of the board - use PPS during layout, then freeze the mapping in firmware. Use the 64-TQFP exposed-lead pattern with standard 0.5mm pitch land pattern per IPC recommendations and Microchip's reference layout in the family datasheet.
Three frequent mistakes with this device: (1) forgetting that Peripheral Pin Select must be unlocked (PPS unlock sequence) before remapping, causing peripherals that silently never appear on pins; (2) using the /PT tape-and-reel part with a reflow profile not qualified for moisture-sensitive TQFP - observe the MSL floor-life requirements; (3) assuming 5V tolerance on I/O - this is strictly a 3.3V part, so 5V sensors need level shifting. Also confirm the correct device variant in your programmer (GM306 vs GM304) to avoid erasing with the wrong device signature in MPLAB X / IPE.
Compliance Information
Standard Microchip production part, RoHS compliant and lead-free per the /PT packing code; formal REACH/halogen certificates available from Microchip compliance portal.
