DSPIC33FJ32GS608-50I/PT - 16-bit 50MIPS DSC 32KB Flash | Microchip
MPN: DSPIC33FJ32GS608-50I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $7.06 | $70.60 |
| 100 | $6.28 | $628.00 |
| 500 | $5.72 | $2,860.00 |
| 1,000 | $5.35 | $5,350.00 |
DSPIC33FJ32GS608-50I/PT Overview
A digital signal controller is a hybrid device that merges the deterministic control flow of a microcontroller (MCU) with the mathematical throughput of a digital signal processor (DSP). Within the power-management semiconductor hierarchy, a DSC sits above a general-purpose MCU and below a full DSP-plus-MCU two-chip solution, making it the preferred single-chip choice for closed-loop digital power conversion.
The GS608 is part of Microchip's SMPS-focused dsPIC33FJ32GS family. Key features include dedicated high-speed SMPS PWM modules with advanced dead-time control, two quadrature encoder interfaces (QEI), four high-speed analog comparators with direct PWM fault coupling, on-chip DAC outputs, and a 10/12-bit ADC for current and voltage feedback sampling. These peripherals were designed specifically for multi-loop digital switch-mode power supply control, where PWM update latency and ADC-trigger timing directly affect loop bandwidth.
Architecturally, the device uses a modified Harvard 16-bit core with DSP instruction support (MAC, dual operand fetch), 3.0V to 3.6V single-supply operation, and In-Circuit Serial Programming (ICSP) via PGECx/PGEDx pins for field programming and debugging. Seventy-four general-purpose I/O pins, five 16-bit timers, and standard I2C, SPI, and UART serial interfaces round out the connectivity. The industrial-grade -40C to +85C operating range suits uncontrolled factory and telecom environments.
Typical applications include AC-to-DC converters, DC-to-DC converters, power factor correction (PFC) stages, uninterruptible power supplies (UPS), solar and battery inverters, embedded power-supply controllers, circuit breakers, and arc fault detection units. The SMPS PWM module's cycle-by-cycle current limiting makes it particularly well matched to half-bridge and interleaved PFC topologies.
Design consideration: keep ICSP trace lengths between the programming connector and PGECx/PGEDx pins as short as possible, per Microchip's datasheet layout guidance, to ensure reliable in-circuit debugging; also budget flash carefully, as 32 KB fills quickly when adding compensator state machines plus communication stacks.
This page synthesizes verified distributor data, drop-in alternatives, practical design notes, and pricing context not consolidated in the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ32GS608-50I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ32GS608-50E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ32GS608-E/PT
✅ Drop-In✓ In Stock
$3.98 / Unit
View Datasheet →DSPIC33FJ64GS608-50I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ16GS608-50I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ64GS608-E/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ32GS608-50I/PT Maximum Ratings & Electrical Characteristics
| Core Processor | dsPIC33F (16-bit DSC) |
| Core Size | 16-bit |
| Maximum Speed | 50 MIPS / 50 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| RAM Size | 4 KB (4K x 8) |
| Supply Voltage | 3.0 V to 3.6 V (3.3 V nominal) |
| Number of I/O | 74 |
| Timers/Counters | 5 (16-bit) |
| Communication Interfaces | I2C, SPI, UART |
| PWM | SMPS high-speed PWM module |
| Comparators | 4 high-speed |
| Quadrature Encoder Interfaces | 2 |
| DAC | On-chip DAC output |
| ADC | High-speed SAR ADC |
| Programming | ICSP via PGECx/PGEDx |
| Package | 80-TQFP (12x12 mm, 0.5 mm pitch) |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
DSPIC33FJ32GS608-50I/PT 80-tqfp (12x12 mm, 0.5 mm pitch) Pin Configuration Guide
Pin configuration for DSPIC33FJ32GS608-50I/PT (80-tqfp (12x12 mm, 0.5 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 DSPIC33FJ32GS608-50I/PT.
Refer to the datasheet for full pin configuration.
Typical Applications
DSPIC33FJ32GS608-50I/PT is suitable for 6 applications: Digital Switch-Mode Power Supplies (SMPS), Power Factor Correction (PFC), Uninterruptible Power Supplies (UPS), Solar and Battery Inverters, Embedded Power-Supply Controllers, Circuit Breakers and Arc Fault Detection.
Digital Switch-Mode Power Supplies (SMPS)
The DSPIC33FJ32GS608-50I/PT was purpose-built for multi-loop digital SMPS control. Its 50 MIPS core executes PID and compensator update routines fast enough for control loops exceeding 100 kHz switching frequencies, while the dedicated SMPS PWM module offers high-resolution duty-cycle updates and cycle-by-cycle current limiting without CPU intervention. The 4 high-speed comparators connect directly to PWM fault inputs, enabling sub-microsecond overcurrent shutdown critical in half-bridge, full-bridge, and LLC converter stages. Firmware stored in 32 KB flash covers multi-loop control plus status communication over UART or I2C. Using the on-chip ADC triggered by PWM events synchronizes current and voltage feedback sampling away from switching edges, improving measurement accuracy.
Recommended
Power Factor Correction (PFC)
In interleaved or single-phase boost PFC stages, the DSPIC33FJ32GS608-50I/PT delivers the deterministic timing that power factor targets above 0.99 demand. Microchip provides an interleaved PFC reference design specifically built on SMPS dsPIC controllers, validating this device class for the topology. The high-speed PWM module generates multiple phase-shifted channels with matched dead-time, while the ADC samples input current and bus voltage synchronously with PWM events for average-current-mode control. Four comparators provide instantaneous overcurrent protection per phase, essential during AC line transients. The 50 MIPS DSP core computes RMS quantities and feedforward terms each half-cycle, and the industrial -40C to +85C rating covers telecom rectifier ambient conditions.
Recommended
Uninterruptible Power Supplies (UPS)
UPS inverter and rectifier control benefits directly from the DSPIC33FJ32GS608's combined MCU and DSP capability. The 32 KB flash holds sinusoidal waveform generation tables, dual-loop voltage/current control, battery management logic, and transfer-switch sequencing simultaneously. The SMPS PWM module's complementary outputs with programmable dead-time drive push-pull and half-bridge inverter stages, while the 4 high-speed comparators implement hardware-level protection against output shorts faster than any interrupt service routine. Two QEI interfaces support motor-driven transfer mechanisms or engine-generator speed sensing in hybrid UPS systems. UART connectivity enables SNMP orModbus monitoring integration, and the wide 3.0V to 3.6V supply tolerates noisy digital rail conditions typical of power electronics enclosures.
Recommended
Solar and Battery Inverters
Grid-tie and off-grid inverter designs use the DSPIC33FJ32GS608-50I/PT to run MPPT algorithms, grid synchronization, and PWM inverter control on a single chip. The 50 MIPS core with DSP multiply-accumulate instructions executes maximum-power-point tracking every control cycle, while the synchronized ADC captures panel voltage, current, and grid waveform samples timed to PWM events. High-speed comparators guard against DC-link and output overcurrent events in hardware. Quadrature encoder inputs support turbine or mechanical tracking applications in hybrid renewable systems. The 74 I/O pins accommodate relays, contactors, auxiliary sensing, and front-panel interfaces without port expanders, and 32 KB flash accommodates anti-islanding and grid-code compliance firmware.
Recommended
Embedded Power-Supply Controllers
As an embedded controller inside larger equipment, the DSPIC33FJ32GS608-50I/PT manages multiple auxiliary power rails, sequencing, telemetry, and fault handling. Five 16-bit timers and 74 I/O pins supervise hot-swap circuits, fan control, and brownout detection, while I2C and SPI interfaces report voltage, current, and temperature to a host manager over PMBus-style links. The SMPS PWM module can trim or phase-manage downstream converters directly, and the 4 comparators implement fast local protection independent of software latency. ICSP programming through PGECx/PGEDx pins allows firmware updates in the field without removing the board. The industrial temperature grade and single 3.3V supply simplify integration into server, telecom, and industrial chassis environments.
Recommended
Circuit Breakers and Arc Fault Detection
Electronic circuit breakers and arc-fault detection units exploit the DSPIC33FJ32GS608's fast analog front end. The high-speed ADC and 4 comparators continuously sample load current waveforms; the comparators trip PWM outputs or interrupts within microseconds when signature thresholds indicating series or parallel arcing appear. The 50 MIPS DSP core runs signature-analysis algorithms (high-frequency noise energy, half-cycle flat-spot detection) that would overload a conventional MCU. Two QEI interfaces and 74 I/O support mechanical actuator control and status indication, while 32 KB flash retains detection thresholds, event logs, and self-test routines. Microchip explicitly lists circuit breakers and arc fault detection among the family's target applications in its product documentation.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ32GS608-50I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ32GS608-50E/PT | DSPIC33FJ32GS608-E/PT | DSPIC33FJ64GS608-50I/PT | DSPIC33FJ16GS608-50I/PT |
|---|---|---|---|---|---|
| Package | 80-TQFP (12x12 mm, PT) | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 32 KB | 32 KB | 32 KB | 64 KB | 16 KB |
| RAM | 4 KB | 4 KB | 4 KB | 8 KB | 2 KB |
| Max Speed | 50 MIPS / 50 MHz | 50 MIPS | 50 MIPS | 50 MIPS | 50 MIPS |
| Operating Temperature | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) |
| SMPS PWM / Comparators | SMPS PWM, 4 comparators, 2 QEI | Same peripheral set | Same peripheral set | Same peripheral set | Same peripheral set |
| I/O Count | 74 | 74 | 74 | 74 | 74 |
| Key Use Case | Industrial digital power (SMPS/PFC/UPS) | High-ambient digital power | Automotive-bay / sealed enclosures | Firmware-heavy digital power | Cost-reduced simple converters |
Key Differentiators
- Dedicated SMPS PWM hardware, not generic MCU PWM (vs DSPIC33FJ32GP304-I/ML)
- Extended-temperature drop-in option (vs DSPIC33FJ32GS608-50E/PT)
- Doubling program memory without redesign (vs DSPIC33FJ64GS608-50I/PT)
Design Notes
Keep ICSP traces short: Microchip's family datasheet (70000591f) explicitly recommends minimizing trace length between the programming connector and the PGECx/PGEDx pins to guarantee reliable in-circuit serial programming and debugging. Route PGEC/PGED away from PWM and gate-driver nets, which carry high dV/dt edges; capacitive coupling into these programming lines can corrupt debug sessions or cause spurious entry into programming mode during power-up in noisy power-conversion environments.
Supply the device from a clean 3.3 V rail (3.0V-3.6V range) with one 0.1 uF ceramic capacitor placed within 2-3 mm of each VDD/VSS pin pair, plus one bulk 4.7-10 uF capacitor per supply domain. Digital power controllers run ADC and PWM at full core speed, so supply ripple directly degrades ADC accuracy; separate the DSC's 3.3 V rail from gate-driver supply rails with an LC filter or ferrite bead to keep ADC sampling free of switching transients.
When sampling switch currents, trigger the ADC from the PWM module rather than software so that conversion occurs during the PWM off-time window, away from switching-node transients. Use the on-chip comparators for cycle-by-cycle overcurrent protection instead of ADC-interrupt paths: comparator-to-PWM fault coupling operates in hardware with sub-microsecond response, while an interrupt-based path adds software latency of several microseconds - a critical margin in a shorted-load event at high switching frequency.
Budget flash realistically: 32 KB must hold the control state machine, compensation routines, communication stack, and bootloader. Teams frequently migrate to the pin-compatible DSPIC33FJ64GS608 mid-project when flash overflows - designing the footprint for the GS608 family from day one keeps this migration free of PCB changes. Also remember all GS608 variants share the same die-level peripheral set, so register-level firmware moves unchanged between memory-size and temperature-grade variants.
Compliance Information
Distributor and datasheet listings identify the part as RoHS-compliant and lead-free (PT suffix denotes lead-free TQFP plating). REACH, halogen-free, and conflict-minerals status must be confirmed from Microchip's official compliance certificates.
