DSPIC33FJ32GS406T-I/PT - 16-Bit 40MIPS 32KB DSC | Microchip
MPN: DSPIC33FJ32GS406T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.2 | $6.20 |
| 10 | $5.58 | $55.80 |
| 100 | $4.96 | $496.00 |
| 500 | $4.46 | $2,230.00 |
| 1,000 | $3.98 | $3,980.00 |
DSPIC33FJ32GS406T-I/PT Overview
A digital signal controller combines the computational throughput of a digital signal processor - hardware multiply-accumulate, DSP-style addressing modes - with the peripheral integration and control peripherals of a microcontroller. Within the power-management hierarchy, the DSC sits above a general-purpose MCU and below a standalone DSP, making the dsPIC33F family a common choice for closed-loop power conversion, motor control, and digital power supplies.
Key features of this SMPS-focused variant include high-resolution PWM modules purpose-built for switching power supplies, a 16-channel 10-bit ADC, integrated analog comparators, and 58 general-purpose I/O pins. Operating from a single 3.3V supply at up to 40 MIPS, the device executes single-cycle MAC and division support in hardware, which shortens control-loop latency in digital power applications.
Technically, the dsPIC33FJ32GS406 belongs to the GS (Switch-Mode Power Supply) subfamily of the dsPIC33F series, distinguished from GP (general purpose) and MC (motor control) siblings by its power-conversion peripheral set. The T suffix denotes tape-and-reel packaging, the I suffix denotes the industrial temperature range of -40C to +85C, and PT denotes the 64-pin thin quad flat pack. In-Circuit Serial Programming (ICSP) is supported via PGECx/PGEDx pins for field updates and debugging.
Typical applications include interleaved power factor correction (Microchip provides a 350W interleaved PFC reference design for this device), digital AC-DC and DC-DC converters, solar micro-inverters, battery chargers, and uninterruptible power supplies.
For design, keep ICSP trace lengths short, decouple all VDD/VDDCORE pins with 0.1uF ceramics, and verify PWM dead-time settings against the power stage before first power-up.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing data as of 2026-09-27.
Drop-in alternatives for DSPIC33FJ32GS406T-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 DSPIC33FJ32GS406T-I/PT (same form factor and footprint) — differing in Operating Temperature, Package, Packaging, Timers, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32GS406-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32GS406T-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ64GS406-I/PT
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →DSPIC33FJ64GS406T-E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ256GP506AT-I/PT
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →DSPIC33FJ128MC804T-I/PT
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →DSPIC33FJ32GS406T-I/PT Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F 16-bit |
| Max CPU Speed | 40 MIPS |
| Program Memory Size | 32 KB (32K x 8) FLASH |
| RAM Size | 4 KB (4K x 8) |
| Supply Voltage | 3.3 V |
| Number of I/O | 58 |
| ADC Resolution | 10 bit |
| ADC Channels | 16 |
| Package | 64-TQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Packaging | Tape & Reel (T suffix) |
| Series | dsPIC33FJ32GS (SMPS/Digital Power) |
| Peripherals | High-speed PWM, ADC, comparators |
| Programming | ICSP via PGECx/PGEDx |
| RoHS Status | Compliant |
| Factory Pack Quantity | 40 |
DSPIC33FJ32GS406T-I/PT 64-tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for DSPIC33FJ32GS406T-I/PT (64-tqfp (10x10 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 DSPIC33FJ32GS406T-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ32GS406T-I/PT is suitable for 6 applications: Interleaved Power Factor Correction, Digital AC-DC Power Supplies, DC-DC Converters and Point-of-Load, Solar Micro-Inverters, Battery Chargers, Uninterruptible Power Supplies (UPS).
Interleaved Power Factor Correction
The DSPIC33FJ32GS406T-I/PT is a proven fit for interleaved PFC: Microchip ships a 350W interleaved PFC reference design built around this exact SMPS DSC family. The GS-family high-resolution PWM generates the phase-shifted switching signals for interleaved boost stages, while the 16-channel 10-bit ADC samples input current, output voltage, and temperature fast enough for inner current-loop bandwidths demanded by universal AC input designs. At 40 MIPS, the core executes the control-law arithmetic - including single-cycle MAC operations - with latency headroom for average-current-mode control. Place the controller between the sensing front end and gate drivers, and budget ADC sampling so current-loop samples align with PWM period boundaries for minimal jitter.
Recommended
Digital AC-DC Power Supplies
In digitally controlled AC-DC converters, the DSPIC33FJ32GS406T-I/PT replaces analog control ICs with a programmable control loop. Its high-speed PWM module provides programmable dead-time, duty resolution, and complementary outputs needed for half-bridge, full-bridge, and LLC topologies, and the on-chip comparators can implement fast cycle-by-cycle current limiting independent of software. The 32KB FLASH accommodates the control loops plus housekeeping, fault handling, and PMBus-style communication for most single-output designs. The 3.3V, 40 MIPS operation keeps timing predictable across -40C to +85C. A key design consideration is ADC-to-PWM synchronization: trigger conversions at mid-PWM-cycle to avoid sampling during switching noise transitions.
Recommended
DC-DC Converters and Point-of-Load
For DC-DC bricks, bus converters, and high-current point-of-load designs, the DSPIC33FJ32GS406T-I/PT provides multiphase control: multiple PWM generators can phase-shift a single rail across several power stages to reduce output ripple and input RMS current. The 58 GPIO and 16 ADC channels let one controller supervise several rails, telemetry, and fault inputs simultaneously. The 32KB FLASH is ample for multiphase loops, soft-start sequencing, and fault logging. Because the ADC is 10-bit with fast conversion, current-share accuracy depends on sense-resistor tolerance, so specify 1% sense elements. The industrial temperature rating suits telecom -48V rectifier environments and compact fanless designs.
Recommended
Solar Micro-Inverters
Solar micro-inverters need MPPT algorithms, grid-synchronized current shaping, and safety interlocks in one controller - all within the DSPIC33FJ32GS406T-I/PT capability set. The dsPIC33F core performs MPPT search arithmetic at 40 MIPS while the high-resolution PWM synthesizes the grid-frequency-referenced output waveform, and the 16-channel ADC tracks panel voltage/current plus grid voltage simultaneously. The 32KB FLASH stores MPPT, anti-islanding, and grid-monitoring code for residential single-phase units. Outdoor mounting drives thermal selection: choose the E-grade DSPIC33FJ32GS406T-E/PT (-40C to +125C) where enclosure temperatures can exceed 85C, since it is pin-to-pin compatible with the I-grade part.
Recommended
Battery Chargers
Smart battery chargers benefit from the DSPIC33FJ32GS406T-I/PT combination of SMPS PWM peripherals and general-purpose control. The controller can run a CC/CV charging profile through the high-speed PWM stage while simultaneously managing cell balancing, temperature monitoring via extra ADC channels, and charger-to-host communication on GPIO/UART pins. The 10-bit ADC resolves battery voltage and current feedback well enough for 1% charge termination when paired with precision sense resistors. The 64-TQFP with 58 I/O supports multiple charge-port designs from one controller. Use the on-chip comparators for hardware overcurrent cutoff so faults trip even if firmware is stalled, and verify dead-time settings against your MOSFET switching times.
Recommended
Uninterruptible Power Supplies (UPS)
Line-interactive and double-conversion UPS designs use the DSPIC33FJ32GS406T-I/PT to control the PFC front end, the inverter bridge, and the battery converter - the GS406 has enough PWM generators and ADC channels for all three stages in one device, reducing BOM count versus multi-controller architectures. The 40 MIPS core sustains the inverter current loop and the slower battery-management tasks concurrently, and 32KB FLASH holds transfer logic, waveform generation, and fault management. The industrial -40C to +85C range covers typical UPS cabinet environments. A critical layout consideration: route ADC sense lines away from PWM gate-drive traces and synchronize sampling away from switching edges to protect measurement accuracy during load transients.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32GS406T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32GS406-I/PT | DSPIC33FJ32GS406T-E/PT | DSPIC33FJ64GS406-I/PT | DSPIC33FJ256GP506AT-I/PT | DSPIC33FJ128MC804T-I/PT |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP - same | 64-TQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (FLASH) | 32 KB | 32 KB | 32 KB | 64 KB | 256 KB | 128 KB |
| Core Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C |
| Family / Peripheral Focus | GS (SMPS digital power) | GS (SMPS digital power) | GS (SMPS digital power) | GS (SMPS digital power) | GP (general purpose) | MC (motor control) |
| Packaging | Tape & Reel (T) | Tube | Tape & Reel (T) | Tube | Tape & Reel (T) | Tape & Reel (T) |
Key Differentiators
- Purpose-built SMPS peripheral set (vs DSPIC33FJ256GP506AT-I/PT)
- Extended-temperature drop-in option (vs DSPIC33FJ32GS406T-E/PT)
- FLASH headroom upgrade path (vs DSPIC33FJ64GS406-I/PT)
Design Notes
According to the Microchip family datasheet, the PGECx and PGEDx pins are used for In-Circuit Serial Programming (ICSP) and debugging; Microchip explicitly recommends keeping trace length between the ICSP connector and the device ICSP pins as short as possible. Route these traces away from PWM gate-drive nets, add series 100-470 ohm resistors near the connector, and provide a common ground reference. Include a 5-pin or 6-pin ICSP header on every production board even if programming is done in-circuit through a backplane.
Decouple every VDD/VDDCORE pair with 0.1uF ceramic capacitors placed within 2 mm of the pins, and use a dedicated low-ESR bulk capacitor per power domain. The 64-TQFP's distributed power pins mean a single shared decoupling network will create ground bounce during simultaneous PWM output switching. On digital power boards, separate the analog ground (AVDD/AVSS domain for the ADC) from the switching power ground and join them at a single star point beneath the controller to keep ADC readings free of switching noise.
Verify dead-time and ADC trigger alignment in firmware before first power-up of the power stage. A common failure mode is triggering the ADC coincident with PWM switching edges, which corrupts current-loop feedback and can cause runaway. Trigger conversions at the midpoint of the PWM off-time. Also confirm the -40C to +85C I-grade rating against your worst-case enclosure temperature; for hot environments order the pin-compatible DSPIC33FJ32GS406T-E/PT rated to +125C rather than rellying on derating.
Estimated: a 64-TQFP 10x10 mm controller dissipating roughly 0.2-0.3 W at 40 MIPS with moderate I/O loading rises only a few tens of degrees above ambient through the package theta_JA, so no heatsink is needed for the DSC itself. However, nearby gate drivers, MOSFETs, and sense resistors dominate board thermal design. Provide thermal vias under the power stage and keep the dsPIC away from hot spots exceeding +125C junction-equivalent, or select the E-grade part which tolerates up to +125C ambient.
Compliance Information
RoHS compliance indicated by distributor listings (digchip/DigiKey). REACH, halogen-free and conflict-minerals declarations not stated in the provided data - confirm via Microchip's environmental compliance pages.
