DSPIC33FJ09GS302T-I/SO - 16-bit 40 MIPS DSC 9KB Flash | Microchip
MPN: DSPIC33FJ09GS302T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.92 | $2.92 |
| 10 | $2.63 | $26.30 |
| 100 | $2.31 | $231.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.84 | $1,840.00 |
DSPIC33FJ09GS302T-I/SO Overview
A digital signal controller combines the computational throughput of a DSP with the peripherals and ease of use of a microcontroller, sitting within the broader hierarchy of MCU -> digital signal controller -> embedded processor. The dsPIC33F family is optimized for embedded control tasks that require fast math and deterministic real-time response, and the GS series within it targets digital power conversion.
Key features include the 16-bit dsPIC core executing up to 40 million instructions per second from 3.0V to 3.6V supply, high-speed PWM modules purpose-built for switch-mode power supplies, 9KB of self-programmable FLASH with write-erase control, and 1KB of on-chip RAM (1024 bytes). The T suffix denotes tape-and-reel delivery for automated pick-and-place assembly, and the I suffix denotes the industrial -40C to +85C temperature grade.
Architecturally, the device pairs a 16-bit modified Harvard RISC core with DSP engine instructions (MAC, DSP multiply) and analog peripherals suited to power conversion sensing and feedback loops, enabling closed-loop control of converters at switching frequencies well into the hundreds of kilohertz.
Typical applications include AC-to-DC converters, DC-to-DC converters, power factor correction (PFC) stages, and uninterruptible power supplies - use cases explicitly cited by Microchip for this SMPS-oriented family.
Design consideration: because the core runs at 3.0V to 3.6V, level-shift or select logic-compatible peripherals when interfacing to 5V systems, and budget the 9KB FLASH carefully, as complex control laws plus bootloader code can approach the 3K x 24 instruction limit.
This page synthesizes distributor listings, drop-in alternatives, pricing context, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ09GS302T-I/SO — 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 DSPIC33FJ09GS302T-I/SO (same form factor and footprint) — differing in Package, Packaging, Mounting Type, Operating Temperature, Core Processor.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ09GS302-I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.41 / Unit
View Datasheet →DSPIC33FJ09GS302T-E/SO
✅ Drop-In✓ In Stock
$2.15 / Unit
View Datasheet →DSPIC33FJ09GS302-E/SO
✅ Drop-In✓ In Stock
$2.69 / Unit
View Datasheet →DSPIC33FJ16GS302-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GS302-I/SO
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ09GS302T-I/SO Maximum Ratings & Electrical Characteristics
| Core Processor | dsPIC33FJ (dsPIC 33F) |
| Core Size | 16-bit |
| Architecture | dsPIC RISC / Digital Signal Controller |
| Maximum Performance | 40 MIPS |
| Program Memory Size | 9KB (3K x 24) FLASH |
| Data RAM Size | 1KB (1024 bytes) |
| Supply Voltage Range | 3.0 V to 3.6 V (3.3 V nominal) |
| Operating Temperature | -40C to +85C (I grade) |
| Package | 28-SOIC (0.295 in, 7.50mm width) |
| Mounting Type | Surface Mount (SMD/SMT) |
| Packaging | Tape & Reel (T suffix) |
| Number of Pins | 28 |
| Target Application Family | SMPS / digital power conversion |
| High-Speed PWM | Yes (dedicated SMPS PWM peripherals) |
| Typical Applications | AC-DC, DC-DC, PFC, UPS |
| RoHS Status | unknown |
| AEC-Q100 | unknown (E/SO variant referenced as AEC-Q100 qualified by distributor) |
DSPIC33FJ09GS302T-I/SO 28-soic (0.295 in, 7.50mm width) Pin Configuration Guide
Pin configuration for DSPIC33FJ09GS302T-I/SO (28-soic (0.295 in, 7.50mm width) 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 DSPIC33FJ09GS302T-I/SO.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ09GS302T-I/SO is suitable for 6 applications: AC-to-DC Converters, DC-to-DC Converters, Power Factor Correction (PFC), Uninterruptible Power Supplies (UPS), Multi-Loop Digital SMPS Control, Embedded Industrial Control with DSP Math.
AC-to-DC Converters
The DSPIC33FJ09GS302T-I/SO is purpose-built by Microchip for digitally controlled AC-to-DC conversion, offering a 40 MIPS dsPIC core and high-speed PWM peripherals that implement voltage- and current-mode control loops entirely in firmware. In a typical offline adapter, the controller samples the output and input conditions through its analog front end and drives PWM gates to regulate the DC bus with adaptive compensation. Running the control law digitally eliminates analog component drift and allows in-firmware tuning of transient response. The 9KB FLASH accommodates the control loop, housekeeping, and protection routines such as overload and brown-out handling, while the 3.0V-3.6V supply keeps controller power minimal relative to the converted load.
Recommended
DC-to-DC Converters
For digitally controlled DC-to-DC conversion - buck, boost, and synchronous topologies - the DSPIC33FJ09GS302T-I/SO pairs its high-speed PWM units with a 16-bit core executing at 40 MIPS, giving loop bandwidths sufficient for fast transient response in intermediate bus and point-of-load converters. The controller reads feedback through its on-chip analog peripherals, computes the duty-cycle correction digitally, and updates PWM comparators within a switching cycle. Because compensation parameters live in the 9KB FLASH, one firmware image can serve multiple output-voltage SKUs, reducing board variants. Designers should note the 1KB RAM constrains very deep averaging buffers, so filter history must be budgeted carefully in control-law design.
Recommended
Power Factor Correction (PFC)
Microchip explicitly lists Power Factor Correction among the target applications of this SMPS dsPIC family, and supports it with an Interleaved PFC reference design that works from universal AC input and delivers a high-voltage DC output up to 350W. The DSPIC33FJ09GS302T-I/SO shapes the input current waveform by sampling the rectified line, computing the current command in real time at 40 MIPS, and modulating the high-speed PWM with the phase control needed for interleaved stages. Digital PFC enables adaptive gain across the universal input range and firmware-based protections such as cycle-by-cycle current limiting. The industrial -40C to +85C rating suits enclosed power supplies and industrial front ends.
Recommended
Uninterruptible Power Supplies (UPS)
The DSPIC33FJ09GS302T-I/SO fits UPS and inverter control where the dsPIC core must run multiple interacting loops - battery charging, inverter voltage regulation, and transfer switching - deterministically. Its 40 MIPS throughput handles the sine-wave PWM modulation math at carrier frequencies typical of UPS output stages, while the high-speed PWM peripherals provide the complementary drive timing and fault trip functionality that battery-backed conversion demands. The 9KB self-programmable FLASH allows field-updatable firmware for charging profiles, and the wide -40C to +85C industrial range covers equipment rooms and unconditioned sites. Microchip lists UPS explicitly among the applications supported by this family's SMPS feature set.
Recommended
Multi-Loop Digital SMPS Control
The GS-series feature set of the DSPIC33FJ09GS302T-I/SO directly supports common multi-loop switch-mode power supply architectures, in which inner current loops and outer voltage or power loops must execute at different rates with predictable phase relationships. The controller's high-speed PWM modules support the dead-time, phase-shift, and complementary outputs required by half-bridge and full-bridge stages, while the 40 MIPS core runs nested loop computations without overflow. Because all control parameters reside in 9KB FLASH, gain scheduling across load ranges is a firmware exercise rather than an analog redesign. This makes the part attractive for configurable industrial supplies where one PCB must serve several output specifications.
Recommended
Embedded Industrial Control with DSP Math
Beyond power conversion, the DSPIC33FJ09GS302T-I/SO serves as a compact 16-bit controller for industrial nodes that need DSP-class math - motor assist loops, sensor signal processing, and fast actuator control - within a 28-pin, 7.50mm SOIC footprint. The modified Harvard RISC core with DSP engine instructions executes multiply-accumulate operations in single cycles, and the industrial -40C to +85C rating plus 3.3V operation integrate cleanly with standard industrial logic levels. The 9KB FLASH suits fixed-function firmware, and tape-and-reel delivery (the T suffix) supports automated production. For code-heavy applications, the pin-compatible DSPIC33FJ16GS302 and DSPIC33FJ32GS302 provide migration headroom without PCB changes.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ09GS302T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ09GS302-I/SO | DSPIC33FJ09GS302T-E/SO | DSPIC33FJ16GS302-I/SO | DSPIC33FJ32GS302-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (7.50mm) | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same | 28-SOIC (7.50mm) - same |
| Core Performance | 16-bit dsPIC, 40 MIPS | 16-bit dsPIC, 40 MIPS | 16-bit dsPIC, 40 MIPS | 16-bit dsPIC, 40 MIPS | 16-bit dsPIC, 40 MIPS |
| FLASH Program Memory | 9KB (3K x 24) | 9KB (3K x 24) | 9KB (3K x 24) | 16KB | 32KB |
| Data RAM | 1KB | 1KB | 1KB | 1KB | 1KB |
| 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 |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C | -40C to +125C (E grade) | -40C to +85C | -40C to +85C |
Key Differentiators
- Optimized specifically for digital SMPS control (vs DSPIC33FJ16GS302-I/SO)
- Tape-and-reel production packaging (vs DSPIC33FJ09GS302-I/SO)
- Industrial temperature range at lower cost than E grade (vs DSPIC33FJ09GS302T-E/SO)
- Trade-off: limited program memory (vs DSPIC33FJ32GS302-I/SO)
Design Notes
The DSPIC33FJ09GS302T-I/SO runs from a single 3.0V-3.6V rail. Decouple each VDD pin with a 0.1uF ceramic capacitor placed within 2-3mm of the pin, plus one bulk 4.7uF-10uF capacitor near the package. In SMPS applications the controller sits next to power-switching stages, so route the digital supply away from gate-drive returns; a local ferrite bead feeding the controller rail reduces coupling of switching edges into the analog and digital supplies.
Budget the 9KB (3K x 24 instruction) FLASH before committing firmware. A full PFC or multi-loop SMPS control law plus a bootloader and communications stack can approach the limit; if your linker map exceeds roughly 80% usage, plan migration to the pin-compatible DSPIC33FJ16GS302-I/SO early rather than late, since the same 28-SOIC footprint makes it a zero-rework upgrade. Also confirm supply tolerance: the absolute core range is 3.0V-3.6V and regulator tolerance must keep the rail inside it under all load transients.
Keep the high-speed PWM outputs as short and direct as possible to their gate-driver inputs; long traces on a power-conversion PCB act as antennas and pick up switching noise. Place the in-circuit programming (PGD/PGC) header on the layout from the first revision - the 28-SOIC has no socketed option, so firmware updates require either the header or board removal. Follow Microchip's GS-family SMPS reference designs for grounding: a single quiet analog ground island for feedback sensing, star-connected to the power ground at one point.
Estimated: at 3.3V and typical controller operating currents for the dsPIC33FJ family (tens of milliamps), internal power dissipation is on the order of 0.1-0.2W, which a 28-SOIC with modest copper dissipation handles without a heatsink. Thermal constraints instead come from board-level ambient: the I grade is rated -40C to +85C ambient, so verify the actual air temperature at the controller location in enclosed supplies; above that, select the E-grade DSPIC33FJ09GS302T-E/SO, which is the same footprint.
Compliance Information
Provided web data does not state RoHS/REACH status for the -I grade. A distributor (Microchip USA) describes the E-grade variant DSPIC33FJ09GS302T-E/SO as AEC-Q100 qualified; qualification status for this exact -I/SO ordering code is not confirmed in the provided data. Verify compliance on the Microchip product page before release.
