DSPIC33FJ32GS608-I/PT - 16-bit 40MIPS DSC 32KB Flash | Microchip
MPN: DSPIC33FJ32GS608-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.42 | $7.42 |
| 10 | $6.68 | $66.80 |
| 100 | $5.85 | $585.00 |
| 500 | $5.2 | $2,600.00 |
| 1,000 | $4.68 | $4,680.00 |
DSPIC33FJ32GS608-I/PT Overview
A digital signal controller combines the computational power of a 16-bit microcontroller with the multiply-accumulate (MAC) throughput of a DSP core. In the power-management hierarchy, a DSC such as the dsPIC33F family member sits between general-purpose MCUs and dedicated DSPs, and is purpose-built for closed-loop digital control of switch-mode power conversion, where high-speed PWM generation, fast analog-to-digital conversion, and analog comparators must operate with deterministic latency.
Key features of the DSPIC33FJ32GS608 include up to four high-speed analog comparators with direct connection to the PWM module for sub-cycle current limiting, a high-speed 16-bit PWM peripheral designed for multi-loop digital power supplies, an onboard ADC for voltage and current sensing, and industrial temperature operation (-40C to +85C) implied by the I temperature suffix. Supply voltage is specified at 3 to 3.6 volts, and the device contains 16 KB of SRAM-class data capability in the GS608 family configuration per the die revision listed in distributor data.
Architecturally, the dsPIC33FJ32GS608 belongs to Microchip's SMPS-focused GS series of dsPIC33F Digital Signal Controllers, which pairs a 16-bit modified Harvard core with DSP instruction extensions. This enables loop compensation, PFC control, and resonant-converter algorithms at switching frequencies well into the hundreds of kilohertz, while keeping firmware fully user-programmable.
Typical applications include AC-to-DC converters, DC-to-DC converters, power factor correction (PFC) stages, and uninterruptible power supplies (UPS), all explicitly cited by Microchip for this device family. It is equally suited to solar inverters, battery chargers, and LED drivers where digital control loops replace analog compensation.
Designers should pay close attention to the 3.0V to 3.6V supply requirement - a dedicated 3.3V low-dropout regulator such as the MCP1700 or equivalent is recommended, with careful PCB decoupling on all VDD/VSS pin pairs of the 80-TQFP package to support PWM switching noise immunity.
This page synthesizes distributor pricing, drop-in alternatives, design notes, and application guidance not found in the manufacturer datasheet alone, as of 2026-09-27.
Drop-in alternatives for DSPIC33FJ32GS608-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 DSPIC33FJ32GS608-I/PT (same form factor and footprint) — differing in Operating Temperature, ADC, Core Architecture, I/O Ports, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32GS608-50I/PT
✅ Drop-In✓ In Stock
$5.35 / Unit
View Datasheet →DSPIC33FJ64GS608-I/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$9.15 / Unit
View Datasheet →DSPIC33FJ128GS608-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GS608-E/PT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.98 / Unit
View Datasheet →DSPIC33FJ32GS608-H/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GS608-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33F DSC |
| Maximum Clock / Performance | 40 MIPS |
| Program Memory Type | Flash |
| Flash Program Memory | 32 KB (32K x 8) |
| Supply Voltage Range | 3 V to 3.6 V |
| I/O Ports | 35 |
| High-Speed Comparators | Up to 4 (direct PWM connection) |
| PWM Peripheral | High-Speed PWM (SMPS-optimized) |
| ADC | Yes (SMPS-optimized) |
| Package Type | 80-TQFP (PT), 12x12 mm, 1 mm height |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (I grade) |
| Lead Free | Yes |
| Target Applications | Digital SMPS, AC-DC, DC-DC, PFC, UPS |
| Lifecycle Status | Active |
DSPIC33FJ32GS608-I/PT 80-tqfp (pt), 12x12 mm, 1 mm height Pin Configuration Guide
Pin configuration for DSPIC33FJ32GS608-I/PT (80-tqfp (pt), 12x12 mm, 1 mm height 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 DSPIC33FJ32GS608-I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ32GS608-I/PT is suitable for 6 applications: AC-to-DC Converter Digital Control, Power Factor Correction (PFC), DC-to-DC Converter Control, Uninterruptible Power Supply (UPS), Solar Micro-Inverter and Charger Control, Digital LED Driver and Lighting Power.
AC-to-DC Converter Digital Control
The DSPIC33FJ32GS608-I/PT is purpose-built by Microchip for digital AC-to-DC converter control, combining its 40 MIPS 16-bit DSP core with a high-speed PWM peripheral and up to four analog comparators connected directly to the PWM for sub-cycle overcurrent protection. In a typical front-end, the DSC executes the rectification-stage control loop at tens of kHz switching frequency while sampling output voltage and input current through its SMPS-optimized ADC. Unlike fixed-function analog controllers, firmware control allows adaptive compensation, inrush management, and telemetry over I2C/UART. The trade-off versus analog control is firmware validation effort, but the payoff is a single controller that can be retuned for different output ratings without hardware redesign.
Recommended
Power Factor Correction (PFC)
Power factor correction is a headline application for the DSPIC33FJ32GS608: Microchip explicitly lists PFC support and ships an Interleaved PFC reference design built on SMPS dsPIC DSCs that operates from universal AC input and delivers a single high-voltage DC output up to 350W. The controller's high-speed PWM generates the boost-stage switching waveform while the 40 MIPS core closes the fast inner current loop and slower outer voltage loop, shaping input current to follow the mains sinusoid and achieve high power factor. The up-to-four on-chip comparators provide cycle-by-cycle current limiting without CPU intervention, a hard-safety requirement in PFC stages where inductor current can escalate quickly during AC zero crossings or load transients.
Recommended
DC-to-DC Converter Control
For DC-to-DC conversion - buck, boost, buck-boost, flyback, and forward topologies - the DSPIC33FJ32GS608-I/PT replaces analog compensation networks entirely with firmware. Its high-speed PWM supports configurable dead-time, complementary outputs, and duty-cycle updates at switching frequency rates, while the ADC samples output voltage and inductor current synchronously with the PWM cycle to minimize switching-noise artifacts. Operating from a regulated 3.0V to 3.6V rail, the DSC consumes its 35 I/O lines efficiently, leaving pins for telemetry, fault signaling, and auxiliary analog sensing. Digital control enables mode switching (CCM/DCM), soft-start profiles, and adaptive dead-time, improving light-load efficiency relative to fixed analog controllers at modest firmware complexity cost.
Recommended
Uninterruptible Power Supply (UPS)
The DSPIC33FJ32GS608-I/PT fits UPS applications because it consolidates multiple control loops - inverter PWM synthesis, battery-charge management, and transfer-switch sequencing - in one 40 MIPS controller. Microchip explicitly names uninterruptible power supplies among the supported digital power-conversion applications for this device. The SMPS-optimized ADC provides synchronized sampling of battery voltage/current and inverter output, while the high-speed PWM drives the inverter bridge with sine-wave modulation; the four on-chip comparators deliver immediate hardware fault shutdown for battery overcurrent or inverter faults. Firmware flexibility allows seamless reconfiguration between line-interactive and double-conversion operating modes, and 35 I/O lines accommodate front-panel and communication interfaces.
Recommended
Solar Micro-Inverter and Charger Control
Digital-power DSCs like the DSPIC33FJ32GS608 are widely used in solar charge controllers and micro-inverter stages, where maximum power point tracking (MPPT) algorithms run alongside PWM power-stage control. The 40 MIPS DSP core with MAC instructions executes MPPT perturb-and-observe or incremental-conductance routines concurrently with the switching loop, while the SMPS ADC samples panel voltage and current synchronously to the PWM for clean power calculations. The 3.0V-3.6V supply and industrial -40C to +85C operation suit outdoor power electronics enclosures. Compared to an analog MPPT controller, the firmware approach permits field firmware updates and multi-chemistry battery charging profiles from the same PCB.
Recommended
Digital LED Driver and Lighting Power
High-current LED drivers benefit from the DSPIC33FJ32GS608's combination of high-speed PWM with fine duty-cycle resolution and integrated analog comparators for constant-current regulation. The controller can implement phase-dimmable, DALI-controlled, or programmable-current LED supplies entirely in firmware: the PWM sets the switching frequency and dimming envelope, while the comparators enforce per-cycle current limits through the LED string. Its 40 MIPS throughput supports simultaneous multi-string control from one 80-TQFP device, using the 35 I/O lines for string selection, fault reporting, and thermal-derivation sensing. Digital dimming curves and temperature-compensated current targets are straightforward firmware tasks, advantages fixed-function LED driver ICs cannot match.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32GS608-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32GS608-50I/PT | DSPIC33FJ64GS608-I/PT | DSPIC33FJ128GS608-I/PT | DSPIC33FJ32GS608-E/PT |
|---|---|---|---|---|---|
| Package | 80-TQFP (PT), 12x12 mm | 80-TQFP (PT) - same | 80-TQFP (PT) - same | 80-TQFP (PT) - same | 80-TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 32 KB | 32 KB | 64 KB | 128 KB | 32 KB |
| Core Performance | 40 MIPS, 16-bit DSC | 16-bit DSC (verify MIPS grade per ordering table) | 40 MIPS, 16-bit DSC | 40 MIPS, 16-bit DSC | 40 MIPS, 16-bit DSC |
| 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 |
| Operating Temperature | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +85C (I grade) | -40C to +125C (E grade) |
| High-Speed Comparators | Up to 4, direct PWM connection | Up to 4 | Up to 4 | Up to 4 | Up to 4 |
| Lifecycle Status | Active | Active | Active | Active | Active |
Key Differentiators
- SMPS-dedicated peripherals vs general-purpose MCU (vs PIC18F25K22-I/SP)
- Cost-efficient 32KB Flash entry point in the GS608 family (vs DSPIC33FJ64GS608-I/PT)
- Extended-temperature drop-in availability (vs DSPIC33FJ32GS608-E/PT)
Design Notes
The DSPIC33FJ32GS608 requires a regulated 3.0V to 3.6V supply. In digital-power products the controller rail is usually derived from the same power stage it controls, so add an RC filter or small LDO between the raw auxiliary rail and VDD to reject switching ripple. Decouple every VDD/VSS pin pair on the 80-TQFP with 0.1uF ceramics placed within 2 mm of the pins, plus one bulk 10uF per supply group. Verify the supply stays above 3.0V during converter startup transients to avoid brown-out resets of the control loop.
Route the comparator and ADC sense lines (current-shunt and output-voltage dividers) as short, guarded traces away from PWM gate-drive nets. Synchronous ADC sampling with the PWM period - a core feature of the SMPS dsPIC family - only works cleanly if the analog front end is quiet; use a dedicated analog ground island tied to the power ground at a single point. Place the 4 comparators' reference filtering close to the chip to preserve sub-cycle current-limit latency.
Do not treat this as a general-purpose MCU: control-loop latency depends on using the high-speed PWM and direct comparator path rather than software interrupts. A common mistake is polling the ADC in software for current limiting - always use the hardware comparator-to-PWM connection for overcurrent protection, reserving software loops for outer voltage regulation. Also confirm the exact speed grade and ordering-suffix meaning on the ordering table of the manufacturer datasheet before substituting GS608 variants.
Estimated: the 80-TQFP (PT) 12x12 mm package on a standard 4-layer PCB with solid ground plane typically provides a junction-to-ambient resistance on the order of 40-50 C/W, so at an estimated 100 mA core current from 3.3V (~0.33 W internal dissipation) junction rise is roughly 15-20 C above ambient - comfortably within the -40C to +85C industrial range. Validate with the actual theta_JA figure in the datasheet; [DATA_NEEDED: theta_JA] prevented a precise calculation here.
Compliance Information
Distributor package records describe the device as 'LEAD FREE, PLASTIC' 80-TQFP. RoHS compliance is expected for current Microchip production; obtain the formal material declaration from Microchip's compliance portal for REACH and halogen-free confirmation.
