DSPIC33EP128GM310T-I/PF - 70 MIPS 16-bit DSC 128KB | Microchip
MPN: DSPIC33EP128GM310T-I/PF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.55 | $65.50 |
| 100 | $5.8 | $580.00 |
| 500 | $5.2 | $2,600.00 |
| 1,000 | $4.75 | $4,750.00 |
DSPIC33EP128GM310T-I/PF Overview
A digital signal controller combines the computational architecture of a digital signal processor - single-cycle MAC, barrel shifter, dual operand fetch, and DSP instruction set - with the deterministic control peripherals of a microcontroller. Within the power-management hierarchy, the dsPIC33E family sits above basic MCUs and below standalone DSPs, making it the de-facto choice for closed-loop motor control, digital power conversion, and sensing applications that need both math throughput and rich peripherals on one chip.
Key features of this GM3-series device include 12 motor-control PWM channels (MCPWM), 8 input capture and 8 output capture/compare channels, 2 quadrature encoder interfaces (QEI) for servo feedback, 4 integrated operational amplifiers for current-sense signal conditioning, a Charge Time Measurement Unit (CTMU) for capacitive-touch and precision timing, and the Peripheral Trigger Generator (PTG) for hardware-automated sequences that offload the CPU.
Technically, the dsPIC33EP core executes from Flash with pipelined 16-bit Harvard architecture, includes 4 DMA channels for peripheral-to-RAM transfers without CPU intervention, and supports Peripheral Pin Select (PPS) so most digital peripherals can be routed to any of the remappable RPn pins - a major advantage for PCB layout flexibility and board respins. Operating voltage is 3.3V, and the I-grade temperature range covers -40C to +85C for industrial environments.
Typical applications include brushless DC and PMSM motor drives (using MCPWM, QEI, and the on-chip op-amps for shunt-current amplification), digital SMPS and power-factor-correction converters, and industrial sensor front ends where the CTMU and 12-bit ADC acquisition pipeline reduce external component count.
Design consideration: because the DSC runs at up to 70 MIPS from an internal PLL, apply rigorous power-supply decoupling on all VDD/VSS pairs and follow the Microchip clock-routing guidelines in the family data sheet to keep switching noise out of the analog op-amp front ends.
This page synthesizes verified distributor data, same-family drop-in alternatives, and application-specific design guidance that goes beyond the raw listing found on distributor sites.
Drop-in alternatives for DSPIC33EP128GM310T-I/PF — 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 DSPIC33EP128GM310T-I/PF (same form factor and footprint) — differing in Operating Temperature, Package, Input Capture / Output Compare, Packaging, Quadrature Encoder Interfaces (QEI).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128GM310-I/PF
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP128GM310T-E/PF
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP256GM310T-I/PF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.9 / Unit
View Datasheet →DSPIC33EP256GM310-I/PF
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.14 / Unit
View Datasheet →DSPIC33EP128GM310T-I/PF Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC DSC (Harvard) |
| Maximum CPU Speed | 70 MIPS |
| Flash Program Memory | 128 KB (43K x 24) |
| RAM | 16 KB |
| Supply Voltage | 3.3 V |
| Motor Control PWM Channels (MCPWM) | 12 |
| Input Capture / Output Compare | 8 / 8 |
| Quadrature Encoder Interfaces (QEI) | 2 |
| On-chip Operational Amplifiers | 4 |
| Charge Time Measurement Unit | CTMU |
| Peripheral Trigger Generator | PTG |
| Package | 100-TQFP (PF), 14x14 mm |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Packaging | Tape & Reel (T) |
DSPIC33EP128GM310T-I/PF 100-tqfp (pf), 14x14 mm Pin Configuration Guide
Pin configuration for DSPIC33EP128GM310T-I/PF (100-tqfp (pf), 14x14 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 DSPIC33EP128GM310T-I/PF.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP128GM310T-I/PF is suitable for 6 applications: Brushless DC / PMSM Motor Drives, Digital Power Conversion (SMPS / PFC), Industrial Sensor Front Ends, Servo Drives and Motion Control, Automated Test and Measurement Equipment, Embedded Industrial Networking Nodes.
Brushless DC / PMSM Motor Drives
The DSPIC33EP128GM310T-I/PF fits BLDC and PMSM drives because its 12 MCPWM channels drive three-phase inverters with complementary outputs and dead-time control, while 2 quadrature encoder interfaces read rotor position at full speed. The 4 on-chip operational amplifiers amplify low-side shunt currents directly into the ADC, cutting external signal-conditioning ICs from the bill of materials. At 70 MIPS, field-oriented control inner loops execute well within PWM periods. Place the DSC between gate drivers and current shunts, with op-amp outputs routed by short traces to the ADC pins; hardware dead-time insertion in the MCPWM module protects the power stage without CPU overhead.
Recommended
Digital Power Conversion (SMPS / PFC)
Digital switch-mode power supplies and power-factor-correction stages benefit from this DSC's deterministic interrupt latency and high-resolution PWM capabilities on the MCPWM module. The 70 MIPS core executes proportional-integral control loops for voltage and current regulation at switching frequencies typical of digital power stages, while the PTG (Peripheral Trigger Generator) sequences ADC sampling to PWM events in hardware, guaranteeing jitter-free sampling of inductor current at the correct instant in each switching cycle. The 3.3V industrial temperature rating suits telecom and server power environments; firmware flexibility enables adaptive control laws and diagnostic telemetry that analog controllers cannot offer.
Recommended
Industrial Sensor Front Ends
With 4 integrated op-amps, a CTMU for precision time and capacitive measurement, and a high-speed ADC pipeline managed by 4 DMA channels, the DSPIC33EP128GM310T-I/PF consolidates an entire analog signal chain on one chip. Sensors such as pressure bridges, thermocouples (via CTMU-based cold-junction techniques), and capacitive elements connect with minimal external components. The 16KB RAM buffers waveform snapshots for FFT-based diagnostics, and Peripheral Pin Select lets the designer move UART/SPI ports to optimal board positions across design revisions. The -40C to +85C I-grade rating matches factory-floor and outdoor instrumentation requirements without component upgrades.
Recommended
Servo Drives and Motion Control
Closed-loop servo systems pair this DSC's dual QEI modules with its MCPWM channels to control two motor axes from one 100-pin device - encoder counting is handled fully in hardware, so the 70 MIPS CPU remains free for position-loop and trajectory calculations. The 8 input-capture channels timestamp hall or index events for velocity estimation with microsecond resolution. Integrated op-amps condition torque-loop current feedback, and the 12-channel PWM bank supports both servo inverter stages and brake-chopper outputs. Typical usage places the GM310 between an EtherCAT-style gateway and the power stage, executing cascade position/velocity/current loops at kilohertz rates.
Recommended
Automated Test and Measurement Equipment
Bench instruments and embedded test modules exploit this DSC's PTG to automate stimulus-response sequences without CPU intervention: the Peripheral Trigger Generator fires ADC conversions, PWM pulses, and timer captures in precisely timed hardware chains, delivering measurement repeatability that software-triggered acquisition cannot match. The CTMU provides sub-nanosecond-class charge-based timing for capacitance and time-interval measurement modes. With 128KB Flash, instrument firmware including calibration tables and communication stacks fits comfortably, and the 100-pin TQFP exposes enough I/O for relay matrices, display interfaces, and USB-UART bridges simultaneously.
Recommended
Embedded Industrial Networking Nodes
As a networked control node, the DSPIC33EP128GM310T-I/PF runs protocol stacks on its 70 MIPS core while hardware peripherals handle line timing: multiple remappable UART, SPI, and I2C ports - routed anywhere on the 100-pin device through Peripheral Pin Select - connect CAN gateways, RS-485 fieldbuses, and local sensors concurrently. The 16KB RAM sustains buffered packet handling, and 128KB Flash stores stacks plus application logic with room for field firmware updates via bootloader. The industrial -40C to +85C rating and 3.3V single-supply operation simplify deployment in control cabinets, and DMA offloads serial transfers to keep interrupt jitter minimal for real-time I/O.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128GM310T-I/PF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128GM310-I/PF | DSPIC33EP128GM310T-E/PF | DSPIC33EP256GM310T-I/PF |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-TQFP (PF) | 100-TQFP (PF) - same | 100-TQFP (PF) - same | 100-TQFP (PF) - same |
| Flash Program Memory | 128 KB | 128 KB | 128 KB | 256 KB |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Operating Temperature | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) |
| MCPWM Channels | 12 | 12 | 12 | 12 |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tape & Reel |
Key Differentiators
- Largest peripheral set in the GM3 family (vs DSPIC33EP128GM306)
- Tape-and-reel packaging for production (vs DSPIC33EP128GM310-I/PF)
- Integrated analog front end (vs DSPIC33EP256GM310T-I/PF)
Design Notes
All VDD/VSS pin pairs on the 100-TQFP must be decoupled with 100 nF ceramic capacitors placed within 2-3 mm of each pin pair, plus one bulk 10 uF capacitor near the supply entry. The 70 MIPS core and switching MCPWM outputs create fast transient loads; inadequate decoupling shows up as ADC noise and spurious resets. Connect all listed VDD/VSS pins even if the application seems light - the device is specified only with all supply pins connected, and ICSP programming will fail otherwise.
Use Peripheral Pin Select to route the analog-adjacent digital peripherals away from the op-amp and ADC pins on the PF package. Keep shunt-amplifier traces from current shunts to the integrated op-amp inputs short and Kelvin-connected at the shunt. Separate the analog ground region under the ADC/op-amp pins from the PWM power ground, joining at a single point near the bulk capacitor to prevent gate-driver return currents from corrupting measurement references.
PGECx and PGEDx pins must be used strictly as matched pairs for ICSP programming and debugging - mixing PGEC2 with PGED3 is a frequent bring-up failure. Confirm the PPS mapping against the family data sheet Section 11.4 limitations table before releasing the schematic, because a few peripherals cannot be mapped to every RPn pin. Finally, verify the reel quantity and moisture-sensitivity level on receipt; TQFP reels require proper baking/storage per MSL classification before reflow.
Compliance Information
Compliance status for this specific reel suffix was not stated in the retrieved data; verify on the Microchip product page or DigiKey listing before release.
