DSPIC33EP128GS704T-I/PT - 16-bit DSC 70 MIPS 128KB Flash | Microchip
MPN: DSPIC33EP128GS704T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.72 | $5.72 |
| 10 | $5.15 | $51.50 |
| 100 | $4.58 | $458.00 |
| 500 | $4.01 | $2,005.00 |
| 1,000 | $3.44 | $3,440.00 |
DSPIC33EP128GS704T-I/PT Overview
A digital signal controller combines the computational architecture of a digital signal processor (DSP) with the peripheral set and ease of use of a microcontroller (MCU). In the power-management hierarchy, a DSC sits between a general-purpose MCU and a dedicated DSP: it executes closed-loop control algorithms such as proportional-integral (PI) loops for switch-mode power supplies at high sampling rates while simultaneously handling communication, housekeeping, and supervisory tasks in a single chip.
The GS70x family is purpose-built for digital power conversion. Key differentiators include interconnected high-speed PWM modules with complementary outputs, dead-time insertion, and fault protection, plus a high-speed 10/12-bit ADC with multiple Sample-and-Hold (S/H) circuits that can sample several feedback signals in near-simultaneity, which is essential for multi-loop SMPS control. On-chip analog features supporting power conversion also include PGA (programmable gain amplifier) inputs and comparators for cycle-by-cycle current limiting, reducing external component count.
Architecturally, the dsPIC33EP core uses a modified Harvard 16-bit architecture with DSP engine instructions (MAC, DSP multiply) executing from dual-partition Flash, enabling live field firmware updates - a critical feature for power products requiring firmware serviceability. The controller operates from a single 3.0V to 3.6V supply at up to 70 MIPS.
Typical applications include AC-to-DC converters, power factor correction (PFC) stages, multi-loop digital switch-mode power supplies (SMPS), DC-DC converters, solar inverters, battery chargers, LED drivers, and uninterruptible power supplies (UPS). The interconnected PWM and fast ADC make it a strong fit for LLC, buck, boost, and half-bridge topologies.
Design consideration: because the device runs from a 3.0V to 3.6V supply, level shifting is required when interfacing to 5V feedback networks; also use Microchip MPLAB X IDE with the PICkit 3/4, ICD 3/4, or MPLAB SNAP programmer for In-Circuit Serial Programming (ICSP) using two device I/O pins plus the reset line.
This page synthesizes distributor pricing from DigiKey, Mouser, LCSC, and Octopart, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers a single citable reference for the DSPIC33EP128GS704T-I/PT (as of 2026-09-23).
Drop-in alternatives for DSPIC33EP128GS704T-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 DSPIC33EP128GS704T-I/PT (same form factor and footprint) — differing in Core Architecture, Operating Temperature, Package, Functional Safety Support, PWM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33EP128GS704-I/PT
✅ Drop-In✓ In Stock
$4.2 / Unit
View Datasheet →DSPIC33EP128GS704T-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33EP256GS704T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP64GS704T-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33EP128GM304T-I/PT
✅ Drop-In✓ In Stock
$3.95 / Unit
View Datasheet →DSPIC33EP128GS704T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33EP modified Harvard, DSP engine |
| Maximum CPU Speed | 70 MIPS |
| Program Memory (Flash) | 128 KB (43K x 24) |
| RAM | 8 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| Operating Temperature | -40C to +85C (industrial, -I suffix) |
| Package | 44-TQFP (10x10x1 mm), 0.8 mm pitch |
| Mounting Type | Surface Mount |
| Product Family | dsPIC33EPXXGS70X/80X Digital Power DSC |
| PWM | Interconnected High-Speed PWM for digital power |
| ADC | High-speed ADC with multiple S/H circuits |
| Analog Features | PGA and comparators for current limiting |
| Flash Partitioning | Dual-partition Flash (live firmware update) |
| Programming/Debug | ICSP via MPLAB SNAP / PICkit / ICD tools |
| Functional Safety Support | FuSa (per DigiKey classification) |
| Packaging | Tape and Reel (T suffix) |
| Typical Applications | SMPS, AC-DC, PFC, digital power conversion |
DSPIC33EP128GS704T-I/PT 44-tqfp (10x10x1 mm), 0.8 mm pitch Pin Configuration Guide
Pin configuration for DSPIC33EP128GS704T-I/PT (44-tqfp (10x10x1 mm), 0.8 mm pitch 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 DSPIC33EP128GS704T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33EP128GS704T-I/PT is suitable for 6 applications: Digital Switch-Mode Power Supplies (SMPS), AC-to-DC Converters and Power Factor Correction, DC-DC Converters (Buck, Boost, LLC), Solar Inverters and Renewable Energy Conversion, Battery Chargers and Battery Management, Uninterruptible Power Supplies (UPS) and Industrial Power.
Digital Switch-Mode Power Supplies (SMPS)
The GS70x family is purpose-built by Microchip for multi-loop digital SMPS control. The DSPIC33EP128GS704T-I/PT executes voltage-mode and current-mode control loops at switching frequencies well beyond conventional MCU capability, thanks to the 70 MIPS core and dedicated DSP MAC instructions. Its interconnected high-speed PWM supports complementary outputs, programmable dead-time, and immediate fault tripping, while multiple high-speed ADC sample-and-hold circuits sample output voltage and inductor current nearly simultaneously - eliminating inter-channel skew that would otherwise limit loop bandwidth. Place the controller's ADC inputs on precision shunt or current-sense amplifier outputs, and use the on-chip comparators for cycle-by-cycle overcurrent protection without CPU intervention. This yields tighter transient response and higher power density than analog-control equivalents.
Recommended
AC-to-DC Converters and Power Factor Correction
For AC-DC front ends and active PFC stages, the DSPIC33EP128GS704T-I/PT provides the fast control bandwidth needed for boost-PFC at line frequencies up to hundreds of kHz switching. The 70 MIPS core executes average-current-mode PFC loops with digital PI compensation updated every switching cycle, while the ADC's multiple S/H circuits capture input voltage, bus voltage, and inductor current with minimal skew - critical for achieving high power factor and low THD. The interconnected PWM generates the boost switch drive with hardware fault shutdown. Firmware-based control also enables adaptive schemes (burst mode, valley switching) that analog controllers cannot easily implement, improving light-load efficiency for 80 PLUS and CoC Tier-2 compliance in server and industrial power supplies.
Recommended
DC-DC Converters (Buck, Boost, LLC)
The DSPIC33EP128GS704T-I/PT controls isolated and non-isolated DC-DC topologies including synchronous buck, boost, and phase-shifted LLC. Its high-speed PWM module offers phase-shift, complementary drive with dead-time insertion, and frequency modulation needed for resonant LLC control, while the DSP engine computes the resonant-tank regulation loop at cycle-rate. The dual-partition Flash permits live firmware updates in the field, valuable for power products requiring feature updates or tuning after deployment. With 128 KB Flash there is headroom for PID libraries, communication stacks (SMBus/PMBus-style telemetry), and fault logging in the same controller, reducing bill-of-materials versus a separate telemetry MCU plus analog controller combination.
Recommended
Solar Inverters and Renewable Energy Conversion
In solar micro-inverters, string inverters, and MPPT (maximum power point tracking) stages, the DSPIC33EP128GS704T-I/PT combines fast closed-loop control with the computation headroom for MPPT algorithms. The 70 MIPS core with DSP instructions runs perturb-and-observe or incremental-conductance MPPT while simultaneously controlling the DC-DC and DC-AC stages via the interconnected high-speed PWM. The high-speed ADC samples panel voltage/current and grid voltage/current in near-simultaneity, supporting grid-code compliance measurements. The -40C to +85C industrial rating suits outdoor enclosure environments, and dual-partition Flash enables field updates as grid interconnection standards evolve - a decisive advantage for products with long service lives in renewable installations.
Recommended
Battery Chargers and Battery Management
Multi-chemistry battery chargers benefit from the DSPIC33EP128GS704T-I/PT's combination of fast current-loop control and flexible supervisory logic. The high-speed PWM with hardware current limiting implements CC/CV charging profiles safely: the on-chip comparators terminate switching cycles within microseconds on overcurrent, independent of software latency. The 128 KB Flash stores charge-profile tables for Li-ion, LiFePO4, lead-acid, and NiMH chemistries, plus communication for smart-battery interfaces. The 8 KB RAM supports state-of-charge estimation filters. The 3.0V to 3.6V supply and -40C to +85C operation fit automotive-adjacent and industrial charger enclosures, and the 44-pin TQFP provides enough remappable I/O for multiple charger channels plus status and communication interfaces.
Recommended
Uninterruptible Power Supplies (UPS) and Industrial Power
In line-interactive and double-conversion UPS systems, the DSPIC33EP128GS704T-I/PT coordinates inverter output regulation, battery charging, and transfer-switch logic in one device. The 70 MIPS core sustains multiple concurrent control loops (output voltage, current sharing, battery current) at high sampling rates, while the interconnected PWM produces the inverter bridge drive with dead-time and rapid fault shutdown for overload or short-circuit events. The multi-channel ADC's near-simultaneous sampling supports three-phase measurements with minimal inter-phase skew, important for THD and phase balance. The industrial -40C to +85C rating and 44-TQFP 10x10 mm footprint suit compact industrial power hardware with forced-air or convection cooling.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33EP128GS704T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33EP128GS704-I/PT | DSPIC33EP128GS704T-E/PT | DSPIC33EP256GS704T-I/PT | DSPIC33EP64GS704T-I/PT | DSPIC33EP128GM304T-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS | 70 MIPS |
| Flash Memory | 128 KB (43K x 24) | 128 KB (43K x 24) | 128 KB (43K x 24) | 256 KB | 64 KB | 128 KB (43K x 24) |
| Operating Temperature | -40C to +85C (-I) | -40C to +85C (-I) | -40C to +125C (-E) | -40C to +85C (-I) | -40C to +85C (-I) | -40C to +85C (-I) |
| Digital Power Peripherals (GS interconnected PWM / power ADC) | Yes (GS70x family) | Yes (GS70x family) | Yes (GS70x family) | Yes (GS70x family) | Yes (GS70x family) | No (GM family peripherals) |
| Packaging / Supply Format | Tape and Reel | Tray | Tape and Reel | Tape and Reel | Tape and Reel | Tape and Reel |
Key Differentiators
- Purpose-built digital power peripheral set (vs DSPIC33EP128GM304T-I/PT)
- Extended temperature drop-in option (vs DSPIC33EP128GS704T-I/PT vs DSPIC33EP128GS704T-E/PT)
- Flash headroom scaling without redesign (vs DSPIC33EP64GS704T-I/PT and DSPIC33EP256GS704T-I/PT)
Design Notes
Power the DSPIC33EP128GS704T-I/PT from a clean 3.3V rail within the 3.0V to 3.6V datasheet window. Decouple each VDD pin with 0.1 uF ceramic capacitors placed within 2 mm of the pin, plus one bulk 10 uF capacitor near the device. In digital power applications the controller shares ground with high di/dt switching paths - use a star or solid ground plane and route analog feedback traces away from PWM outputs. Estimated: a 70 MIPS dsPIC33EP draws tens of mA typical; ensure the 3.3V regulator has margin for peak core current plus I/O drive.
The 44-TQFP (10x10 mm, 0.8 mm pitch) footprint needs no exposed-pad via field, but place the ADC sense-network RC filters close to the analog input pins and use the datasheet-recommended VDD/VSS pair connections. Keep the high-speed PWM traces short and away from ADC inputs to minimize coupling into feedback channels. Provide ICSP access (PGEC/PGED plus MCLR and VDD/VSS) on a standard header so MPLAB SNAP, PICkit, or ICD tools can connect for in-circuit debugging and production programming without removing the board.
Do not exceed 3.6V on VDD - many digital power boards derive logic from auxiliary supplies that can overshoot at startup; add a clamp or LDO. Verify pin-mapping when substituting family members: GS and GM families share the 44-TQFP footprint but different peripheral multiplexing, so firmware is not binary-portable. Also remember the T suffix denotes Tape and Reel (2000-piece reel typical); for prototypes order cut tape or the Tray-packaged DSPIC33EP128GS704-I/PT to avoid full-reel minimums.
Compliance Information
Microchip standard products in /PT (TQFP) lead-free packages are RoHS compliant; distributor listing confirms standard Microchip environmental profile. REACH/halogen/conflict-minerals certificates should be pulled from Microchip environmental documentation. Family is classified by DigiKey with Functional Safety (FuSa) support; not an automotive AEC-Q100 part number.
