DSPIC33EP128GS808-I/PT - 16-bit DSC 70MIPS 128KB CAN | Microchip
MPN: DSPIC33EP128GS808-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $10.6 | $10.60 |
| 10 | $9.8 | $98.00 |
| 100 | $8.95 | $895.00 |
| 500 | $8.2 | $4,100.00 |
| 1,000 | $7.55 | $7,550.00 |
DSPIC33EP128GS808-I/PT Overview
A Digital Signal Controller combines the computational architecture of a Digital Signal Processor (DSP) with the peripheral integration and ease of use of a microcontroller (MCU). In the power-management hierarchy, DSCs occupy the space between general-purpose MCUs and dedicated DSPs, offering multiply-accumulate (MAC) instructions and high-resolution PWM peripherals tailored for closed-loop digital power conversion.
Key features of this device include the 70 MIPS dsPIC33EP core with DSP engine, 128 KB self-programming Flash and 8 KB on-chip RAM, dual CAN 2.0B modules for industrial networking, high-speed 12-bit ADCs with up to 4 Msps sampling for simultaneous multi-channel sensing, high-resolution PWM outputs suited to switch-mode power supplies, and multiple UART/SPI/I2C communication ports for system connectivity.
Architecturally, the dsPIC33EP GS family is designed specifically for digital power applications such as switch-mode power supplies, power factor correction, and solar inverters. The core executes a modified Harvard architecture with single-cycle MAC and hardware divide support, while the intelligent power peripherals offload timing-critical PWM modulation and fault protection from software, enabling fast loop response and deterministic behavior.
Typical applications include digital SMPS and AC-DC power supplies, interleaved power factor correction (PFC) stages up to 350 W as demonstrated in Microchip reference designs, solar micro-inverters, battery chargers, uninterruptible power supplies, and motor control drives. CAN connectivity also makes it suitable for industrial automation nodes and automotive-adjacent control systems within the industrial temperature range.
For design, note the device operates at 3.3 V and requires careful decoupling of the multiple VDD/VDDCORE pins; use Microchip's MPLAB X IDE and XC16 compiler with the dsPIC33EP128GS808 Development Board for rapid prototyping, and program via ICSP using tools such as PICkit or ICD.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing unique selection value for engineers.
Drop-in alternatives for DSPIC33EP128GS808-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 DSPIC33EP128GS808-I/PT (same form factor and footprint) — differing in Operating Temperature, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128GS808-E/PT
✅ Drop-In✓ In Stock
$4.9 / Unit
View Datasheet →DSPIC33EP128GS808-ET/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP256GS808-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64GS808-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.78 / Unit
View Datasheet →DSPIC33EP256GS808-E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128GS808-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC DSC with DSP engine |
| Maximum CPU Speed | 70 MIPS |
| Flash Memory | 128 KB |
| RAM | 8 KB |
| Supply Voltage | 3.3 V |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 80-pin TQFP (12x12 mm) |
| CAN Modules | Yes (CAN 2.0B) |
| Communication Interfaces | UART, SPI, I2C, CAN |
| ADC | 12-bit high-speed, up to 4 Msps |
| PWM Peripherals | High-resolution PWM for digital power |
| Mounting Type | Surface Mount |
| Packaging | Tray |
| Family | dsPIC33EP GS (digital power) |
| Typical Applications | SMPS, PFC, solar inverter, digital power |
| Programming Interface | ICSP (MPLAB ICD/PICkit) |
DSPIC33EP128GS808-I/PT 80-pin tqfp (12x12 mm) Pin Configuration Guide
Pin configuration for DSPIC33EP128GS808-I/PT (80-pin tqfp (12x12 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 DSPIC33EP128GS808-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP128GS808-I/PT is suitable for 6 applications: Digital Switch-Mode Power Supplies (SMPS), Interleaved Power Factor Correction (PFC), Solar Micro-Inverters, Motor Control Drives, Uninterruptible Power Supplies (UPS), Industrial Automation and CAN Networking Nodes.
Digital Switch-Mode Power Supplies (SMPS)
The DSPIC33EP128GS808 is purpose-built for digitally controlled SMPS topologies. Its 70 MIPS core executes control-loop compensation fast enough for switching frequencies in the hundreds of kHz, while high-resolution PWM peripherals generate precisely timed gate signals with nanosecond-class resolution. The high-speed 12-bit ADC samples output voltage and inductor current for fast inner loops, and hardware fault inputs can trip PWM outputs without CPU intervention, protecting the power stage during transients. Placed as the controller in AC-DC or DC-DC converters, the DSC replaces analog compensation networks with firmware, enabling configurable soft-start, adaptive dead-time, and telemetry via UART or CAN. The trade-off versus analog control is firmware development effort, offset by product flexibility.
Recommended
Interleaved Power Factor Correction (PFC)
Microchip's interleaved PFC reference design demonstrates the dsPIC33EP GS family controlling universal-input PFC stages producing up to 350 W of regulated DC output. The DSPIC33EP128GS808 is well suited here because its fast 12-bit ADC simultaneously samples input voltage, input current, and bus voltage each switching cycle, and its high-resolution PWM outputs drive multiple interleaved phases with precise phase shifting, reducing input ripple current. The 70 MIPS core executes average-current-mode control loops plus input-voltage feedforward within each period, holding power factor near unity across the universal input range. Fault trip inputs protect against overcurrent and bus overvoltage conditions in hardware, meeting safety expectations without relying on software latency.
Recommended
Solar Micro-Inverters
In solar micro-inverter designs, the DSPIC33EP128GS808 performs maximum power point tracking (MPPT), grid-synchronized current injection, and protection functions in one device. The high-speed ADC samples panel voltage/current and grid voltage waveforms, while the 70 MIPS DSP engine with single-cycle MAC instructions efficiently computes MPPT algorithms and sinusoidal reference generation. High-resolution PWM drives the power conversion stages with the precision needed for low THD grid-current output. On-chip CAN or UART enables monitoring and grid-tie communication to a system controller. Firmware-based control allows adaptive algorithms per installation site, a key advantage over fixed analog solutions for energy-harvesting applications.
Recommended
Motor Control Drives
The DSPIC33EP128GS808 executes field-oriented control (FOC) for PMSM, BLDC, and AC induction motors. Its 70 MIPS core with DSP multiply-accumulate support computes Clarke/Park transforms and PI current loops at PWM frequency, while the 12-bit ADC uses simultaneous sampling triggered by PWM to measure phase currents at consistent instants, minimizing ripple-induced measurement error. High-resolution PWM with programmable dead-time drives three-phase inverters, and hardware fault inputs implement cycle-by-cycle current limiting or immediate shutdown on overcurrent. Quadrature encoder interfaces support position feedback. CAN connectivity integrates the drive into industrial networks for command and status telemetry in automation and robotics systems.
Recommended
Uninterruptible Power Supplies (UPS)
In UPS systems, the DSPIC33EP128GS808 controls the rectifier, inverter, and battery-charger stages from a single 80-pin controller. The high-speed ADC continuously monitors AC line, battery voltage, and output waveforms, while the 70 MIPS core maintains output voltage regulation and seamless transfer between line and battery modes within half-cycle windows. High-resolution PWM generates the inverter's sinusoidal output with low distortion, and the DSP engine handles battery charge-management algorithms including multi-stage CC/CV charging. CAN or UART interfaces report status to building management systems. The 128 KB Flash accommodates comprehensive firmware including mode state machines, communications stacks, and self-test routines with headroom.
Recommended
Industrial Automation and CAN Networking Nodes
Beyond power conversion, the DSPIC33EP128GS808 serves as a smart industrial control node where CAN 2.0B connectivity, real-time processing, and analog sensing converge. Its integrated CAN modules implement device-network communication for factory automation, HVAC control, and process monitoring without an external CAN controller. The 12-bit ADC digitizes sensor channels, the 70 MIPS core executes local control logic and protocol handling, and multiple UART/SPI/I2C ports connect displays, memory, and peripherals. Operating from -40C to +85C, the industrial temperature grade suits cabinet-mounted and unconditioned environments. The 128 KB Flash stores protocol stacks and application logic, while ICSP supports field firmware updates during maintenance windows.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128GS808-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128GS808-E/PT | DSPIC33EP128GS808-ET/PT | DSPIC33EP256GS808-I/PT | DSPIC33EP64GS808-I/PT |
|---|---|---|---|---|---|
| Package | 80-pin TQFP (12x12 mm) | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP - same | 80-pin TQFP (12x12 mm) - same | 80-pin TQFP (12x12 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 64 KB |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Operating Temperature | -40C to +85C | -40C to +125C | -55C to +125C | -40C to +85C | -40C to +85C |
| CAN | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) | Yes (CAN 2.0B) |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
Key Differentiators
- Extended temperature option in identical package (vs DSPIC33EP128GS808-E/PT)
- Flash scalability without PCB change (vs DSPIC33EP256GS808-I/PT)
- Digital-power-optimized peripheral set (vs DSPIC33EP128GS808-E/PT)
- Cost trade-off on smaller Flash (vs DSPIC33EP64GS808-I/PT)
Design Notes
The device operates from a single 3.3 V supply with separate VDD, VDDCORE, and VCAP requirements typical of the dsPIC33EP family. Provide low-ESR decoupling capacitors (0.1 uF ceramic) at every VDD pin pair, placed within a few millimeters of each pin, plus bulk capacitance near the package. The VCAP pin requires the specific capacitance stated in the datasheet for the internal regulator stability - do not omit or substitute it. Estimated: allocate at least 100 uF of bulk capacitance per power rail for boards with high transient loads such as gate drivers sharing the 3.3 V rail.
The 80-pin TQFP (12x12 mm) uses 0.5 mm lead pitch; design the land pattern per the Microchip package outline drawing to avoid solder bridging. Keep the analog ground domain (ADC references, VREF pins) separated from power-switching ground returns with a single-point connection under the IC. Route PWM outputs away from ADC input traces; in digital power designs, gate-driver loops are the primary noise source and can corrupt the 12-bit ADC conversions if crosstalk is not managed with ground guard traces.
Firmware written for the -I/PT runs unchanged on -E, -ET, and 256 KB variants, but always verify the temperature grade matches your worst-case ambient: the -I grade stops at +85C while the -E grade extends to +125C. When migrating from other dsPIC33 families, note that the GS family's high-resolution PWM peripherals and ADC sequencing differ from GP/GM family peripherals - control-loop code is not copy-paste portable. Also configure configuration words (oscillator, watchdog, code protection) carefully; incorrect oscillator settings are the most common bring-up failure on dsPIC33 devices.
For digital power applications, trigger ADC sampling from the PWM module rather than a free-running timer so that phase currents are measured at consistent points in the switching cycle (typically at the PWM midpoint, away from switching edges). This synchronous sampling eliminates switching-noise aliasing and improves control-loop accuracy significantly. Use the on-chip simultaneous sampling capability for multi-channel current/voltage measurement, and enable the digital filter/comparator features where available to reduce software latency in protection paths.
Compliance Information
Compliance status not stated in the provided web data. Microchip standard catalog parts are typically RoHS-compliant; verify on the official Microchip product page before procurement.
