DSPIC33FJ64GS406-I/PT - 16-bit DSC, 40MIPS, 64KB Flash | Microchip
MPN: DSPIC33FJ64GS406-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.2 | $6.20 |
| 10 | $5.58 | $55.80 |
| 100 | $4.96 | $496.00 |
| 500 | $4.34 | $2,170.00 |
| 1,000 | $3.85 | $3,850.00 |
DSPIC33FJ64GS406-I/PT Overview
A digital signal controller combines the computational throughput of a DSP with the peripheral integration and ease of use of a microcontroller. Within the power-management hierarchy, the DSC sits between general-purpose MCUs and full DSPs: it offers Harvard-architecture dual-bus fetching, DSP multiply-accumulate instructions, and, in the GS family, purpose-built switch-mode power supply (SMPS) peripherals. This makes the dsPIC33FJ GS family the de-facto standard for fully digital power conversion, where control loops execute at switching frequencies of 100 kHz to 1 MHz.
Key features of this part center on digital power conversion: a high-speed PWM module with complementary outputs, dead-time insertion, and fault protection; a high-speed 10-bit ADC capable of sampling multiple channels simultaneously with the PWM for tightly coupled control loops; and on-chip comparators. Peripherals supporting common multi-loop digital SMPS topologies include AC-DC converters, DC-DC converters, power factor correction (PFC), and uninterruptible power supplies, per the Microchip product page.
The 16-bit dsPIC33F CPU core executes modified Harvard instructions with hardware multiply-accumulate, division assist, and 40 MIPS maximum operation at 3.3V. DMA channels move ADC results and PWM data without CPU intervention, freeing cycles for the control-law computation. Flash self-programming supports field firmware updates in deployed power supplies.
Typical applications include interleaved power factor correction stages (Microchip's Interleaved PFC reference design produces 350W from universal AC input), server and telecom DC-DC bricks, solar micro-inverters, battery chargers, and uninterruptible power supply (UPS) control boards. The industrial temperature grade and 64 I/O-capable pin count suit multi-rail power systems.
Design consideration: all VDD/VSS pairs must be decoupled, and ICSP programming requires using a matched PGECx/PGEDx pair - ICSPCLK and ICSPDAT must come from the same pair number.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ64GS406-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 DSPIC33FJ64GS406-I/PT (same form factor and footprint) — differing in Package, Supply Voltage, Core Architecture, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ64GS406-E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GS406-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GS606-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.41 / Unit
View Datasheet →DSPIC33FJ32GS606-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GS406-50E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GS406-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F |
| Max CPU Speed | 40 MIPS |
| Program Memory | 64 KB Flash |
| Supply Voltage | 3 V to 3.6 V |
| Operating Temperature | -40C to +125C |
| Package | TQFP-64 (PT) |
| Mounting Type | Surface Mount |
| Timers | 5 timers |
| DMA Channels | 4 DMA channels |
| External Interrupts | 5 |
| Communication Interfaces | I2C, SPI, UART |
| High-Speed PWM | Yes (SMPS-optimized with dead-time and fault protection) |
| ADC | High-speed 10-bit ADC |
| Comparators | On-chip comparators |
| Programming Interface | ICSP (multiple PGECx/PGEDx pairs) |
| RoHS Status | Lead-free, RoHS compliant package |
DSPIC33FJ64GS406-I/PT tqfp-64 (pt) Pin Configuration Guide
Pin configuration for DSPIC33FJ64GS406-I/PT (tqfp-64 (pt) 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 DSPIC33FJ64GS406-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ64GS406-I/PT is suitable for 6 applications: AC-DC Power Supplies, Power Factor Correction (PFC), DC-DC Converters, Uninterruptible Power Supplies (UPS), Solar Micro-Inverters, Battery Chargers and BMS Front Ends.
AC-DC Power Supplies
The DSPIC33FJ64GS406-I/PT digitally controls offline AC-DC converters, replacing analog control loops with firmware-executable, tunable control laws. Its high-speed PWM produces complementary outputs with programmable dead-time and cycle-by-cycle current limiting via fast fault trip inputs, while the high-speed 10-bit ADC samples output voltage and primary current synchronized to the PWM period - eliminating skew that destabilizes peak-current-mode control. At 40 MIPS, the DSP core closes voltage and current loops for topologies such as flyback, forward, and LLC at switching frequencies up to several hundred kilohertz. Digital implementation enables adaptive burst mode for light-load efficiency and firmware firmware updates in the field using flash self-programming.
Recommended
Power Factor Correction (PFC)
Power factor correction is a flagship application for the GS family: Microchip's own Interleaved PFC reference design uses the dsPIC33FJ GS series to convert universal AC input into a single high-voltage DC output up to 350W. The DSPIC33FJ64GS406-I/PT executes inner current-loop and outer bus-voltage-loop control at rates unattainable by 8-bit MCUs, using the high-speed ADC to sample inductor current each PWM cycle. Interleaved two-phase PFC benefits from dual PWM generators with precise phase offset, reducing input ripple current and easing EMI filter design. Firmware flexibility supports adaptive switching-frequency operation and brown-out handling that analog controllers cannot easily implement.
Recommended
DC-DC Converters
For telecom, server, and industrial DC-DC bricks, the DSPIC33FJ64GS406-I/PT implements buck, boost, and synchronous rectification control in firmware. The SMPS-optimized PWM supports complementary, push-pull, and phase-shifted drive modes with sub-nanosecond-resolution dead-time tuning, maximizing synchronous-rectifier efficiency. The high-speed 10-bit ADC with multiple sample-and-hold circuits captures input voltage, output voltage, and current in one PWM-synchronized burst, and 4 DMA channels stream results to RAM without CPU intervention. The 3V to 3.6V supply and -40C to +125C grade survive harsh enclosed-enclosure ambient conditions, while 64KB flash holds multi-topology firmware and logging code.
Recommended
Uninterruptible Power Supplies (UPS)
UPS systems need coordinated control of rectifier, inverter, and transfer switch stages - a multi-loop problem the DSPIC33FJ64GS406-I/PT was explicitly designed for, per Microchip's digital power conversion feature list. The 40 MIPS DSP core runs inverter sine-wave modulation, battery-charge management, and grid-monitoring state machines concurrently, while 5 timers and 5 external interrupts handle zero-crossing detection and fast fault shutdown. The high-speed PWM generates the inverter drive with dead-time protection, and the synchronized ADC samples battery current and AC output for true-RMS regulation. 64KB flash stores multi-mode firmware (line-interactive, double-conversion) selectable at runtime.
Recommended
Solar Micro-Inverters
Solar micro-inverters combine MPPT (maximum power point tracking) with grid-synchronized DC-AC inversion - a workload well matched to the DSPIC33FJ64GS406-I/PT. MPPT algorithms run continuously on the 16-bit DSP core while the high-speed PWM drives the power stage; the PWM-synchronized ADC samples panel voltage/current and grid voltage for perturb-and-observe or incremental-conductance tracking. 40 MIPS leaves headroom for grid-protection firmware (anti-islanding, frequency/voltage windows) mandated by interconnection standards. The industrial -40C to +125C rating suits rooftop enclosures, and 64KB flash accommodates firmware upgrades deployed over the inverter lifetime.
Recommended
Battery Chargers and BMS Front Ends
Smart battery chargers require precisely profiled CC/CV charging curves, temperature-qualified operation, and fault handling - all firmware-natural on the DSPIC33FJ64GS406-I/PT. The high-speed PWM regulates charger power-stage current with cycle-by-cycle limiting; the synchronized high-speed ADC monitors battery voltage, current, and thermistor inputs for accurate charge termination. The 5 external interrupts respond instantly to fault conditions such as over-current or reverse polarity, and comparators provide hardware-level protection independent of firmware latency. Multiple I2C/SPI/UART ports interface gas gauges, displays, and host systems, while the 3.3V digital supply simplifies integration with gauge ICs.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ64GS406-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ64GS406-E/PT | DSPIC33FJ32GS406-I/PT | DSPIC33FJ64GS606-I/PT | DSPIC33FJ32GS606-I/PT | DSPIC33FJ64GS406-50E/PT |
|---|---|---|---|---|---|---|
| Package | TQFP-64 (PT) | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Speed | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 50 MHz speed grade |
| Flash Memory | 64 KB | 64 KB | 32 KB | 64 KB | 32 KB | 64 KB |
| Supply Voltage | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V |
| Operating Temperature | -40C to +125C | -40C to +150C (extended) | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +150C (extended) |
| CAN Module | No | No | No | Yes (CAN 2.0B) | Yes (CAN 2.0B) | No |
| SMPS Peripherals (High-Speed PWM, ADC, Comparators) | Yes | Yes - identical | Yes - identical | Yes - expanded ADC | Yes - expanded ADC | Yes - identical |
Key Differentiators
- Purpose-built SMPS peripheral set (vs PIC18F26K40-I/SS)
- Extended-temperature drop-in option (vs DSPIC33FJ64GS406-E/PT)
- CAN networking headroom (vs DSPIC33FJ32GS406-I/PT)
Design Notes
Route the ICSP programming header using a matched PGECx/PGEDx pair: if PGEC2 carries ICSPCLK, ICSPDAT must be PGED2 - mixing pairs from different numbers prevents programming. Per NSDSP documentation the dsPIC33FJ64GS406 offers multiple pairs, so pick the one closest to the board edge for programming access. Connect the header's MCLR line through a suitable isolation resistor so the programmer can drive reset without fighting board pull-ups.
The part requires a 3V to 3.6V supply, nominally 3.3V. Decouple every VDD/VSS pair with 100nF ceramic capacitors placed within 2mm of the pins, plus one bulk 10uF per supply domain. In SMPS applications, keep the digital controller ground plane separate from the power-stage ground return and join them at a single point near the shunt resistor to prevent switching currents from corrupting ADC ground reference and causing false over-current trips.
The high-speed ADC is PWM-synchronized by design: configure sampling so the sample-and-hold triggers at the PWM off-time (or a defined phase) rather than asynchronously, eliminating switching-noise pickup from the power stage. Keep analog input traces short, away from PWM traces, and add RC anti-aliasing filters sized for the ADC acquisition window. Route the PWM gate-drive outputs away from ADC inputs to minimize coupled dv/dt artifacts in current-loop readings.
Do not assume the -I grade covers extended-temperature power supplies: 125C is the limit, and junction heating in hot enclosures can consume most of it - if ambient approaches 105C or higher, specify the DSPIC33FJ64GS406-E/PT (150C) instead. Also remember the 3.3V supply is not 5V tolerant on all I/O; level-shift or series-resistor protect any inputs driven from 5V logic such as legacy fault flags or RS-232 interfaces.
Compliance Information
Package described as lead-free plastic per chipdig package data ('QFNL, lead free, plastic' note refers to family packaging variants); the -I/PT TQFP-64 is lead-free and RoHS compliant per Microchip standard policy. REACH, halogen-free, and conflict-minerals status not stated in provided data.
