DSPIC33FJ16GS504-I/PT - 16-bit DSC, 40 MIPS, 16KB Flash | Microchip
MPN: DSPIC33FJ16GS504-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.82 | $38.20 |
| 100 | $3.41 | $341.00 |
| 500 | $2.99 | $1,495.00 |
| 1,000 | $2.68 | $2,680.00 |
| 3,000 | $2.35 | $7,050.00 |
DSPIC33FJ16GS504-I/PT Overview
What is a Digital Signal Controller? A DSC is a hybrid device that merges a microcontroller (MCU) with a single-cycle DSP engine on a single die. The result is a part that can run deterministic control loops (PID, state machines, communication stacks) AND execute signal-processing math (MAC, FFT, IIR/FIR filters, sliding-mode control) without offloading to a separate DSP chip. The dsPIC33F family, of which the DSPIC33FJ16GS504 is a member, sits in the broader taxonomy: microcontroller -> DSC -> digital signal controller -> embedded processing -> semiconductor. The 'GS' suffix indicates the 'General-purpose Switch-mode power supply' variant, tuned for SMPS and digital power applications.
Key differentiating features include up to four high-speed 10-bit PWMs with 1.04 ns resolution, a 12-bit ADC capable of 1.1 Msps with up to 18 analog inputs, up to four high-speed analog comparators with direct PWM-trigger paths, and Peripheral Pin Select (PPS) for flexible I/O mapping. These resources enable multi-loop digital SMPS topologies on a single chip.
The architecture combines a 16-bit modified Harvard core with a single-cycle 40-bit accumulator DSP engine, on-chip 16 KB Flash with self-programmability, and 2 KB SRAM. The 'GS' peripheral set (high-speed PWM, ADC, comparators, programmable fault inputs) is the engineering reason this part is recommended over general-purpose dsPIC33FJxxMCxxx motor-control variants in SMPS designs.
Typical applications include AC/DC and DC/DC converters, Power Factor Correction (PFC) stages, uninterruptible power supplies (UPS), digital solar inverters, and high-density quarter-brick intermediate-bus converters (referenced in Microchip's published reference designs).
Design consideration: At 40 MIPS the device dissipates roughly 40 mA core current; de-rate by 1.5x for thermal guard-band on a 4-layer 2 oz copper 44-TQFP PCB with no airflow. Tie unused PWM outputs to logic low through 10 kOhm to prevent shoot-through.
This page synthesizes distributor pricing, drop-in alternatives from the same dsPIC33F 'GS' family, and practical PCB layout guidance not collected in a single place inside the manufacturer datasheet.
Drop-in alternatives for DSPIC33FJ16GS504-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 DSPIC33FJ16GS504-I/PT (same form factor and footprint) — differing in ADC, Core Architecture, Package, Operating Temperature, Analog Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS504-H/PT
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →DSPIC33FJ16GS504-E/PT
✅ Drop-In📋 Reference alternative (not in catalog)
DSPIC33FJ16GS504-50I/PT
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →DSPIC33FJ32GS504-I/PT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DSPIC33FJ16GS504-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | dsPIC33F 16-bit DSC (modified Harvard) |
| CPU Speed | 40 MIPS @ 40 MHz |
| Program Memory (Flash) | 16 KB |
| Data RAM | 2 KB |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| I/O Pins | 35 |
| PWM Channels | Up to 4 high-speed 10-bit PWM outputs |
| PWM Resolution | 1.04 ns (at 40 MIPS) |
| ADC | 12-bit, up to 1.1 Msps, up to 18 analog inputs |
| Analog Comparators | Up to 4 high-speed comparators |
| ROM Type | Flash (self-programmable) |
| Operating Temperature | -40 C to +85 C (industrial, 'I' suffix) |
| Package | 44-pin TQFP (10 x 10 x 1 mm) |
| Mounting Type | Surface Mount |
| Peripheral Pin Select (PPS) | Yes |
| Lead-Free / RoHS | Lead-free / RoHS compliant (per distributor listing) |
DSPIC33FJ16GS504-I/PT Pin Configuration
| Pin 1 | RP21/RC13 — Remappable I/O / UART1 RX |
| Pin 2 | RP22/RC14 — Remappable I/O / SPI SCK |
| Pin 3 | VSS — Ground |
| Pin 4 | VDD — Digital supply voltage (3.0-3.6 V) |
| Pin 5 | PWM1H — PWM output 1 high-side driver |
| Pin 6 | PWM1L — PWM output 1 low-side driver |
| Pin 7 | PWM2H — PWM output 2 high-side driver |
| Pin 8 | PWM2L — PWM output 2 low-side driver |
| Pin 9 | PWM3H — PWM output 3 high-side driver |
| Pin 10 | PWM3L — PWM output 3 low-side driver |
| Pin 11 | PWM4H — PWM output 4 high-side driver |
| Pin 12 | PWM4L — PWM output 4 low-side driver |
| Pin 13 | FLTA1 — PWM fault A input |
| Pin 14 | FLTB1 — PWM fault B input |
| Pin 15 | AN0/RA0 — Analog input 0 / port A bit 0 |
| Pin 16 | AN1/RA1 — Analog input 1 / port A bit 1 |
| Pin 17 | AVSS — Analog ground |
| Pin 18 | AVDD — Analog supply (tie to VDD) |
| Pin 19 | AN2/RP13 — Analog input 2 / remappable I/O |
| Pin 20 | AN3/RP14 — Analog input 3 / remappable I/O |
| Pin 21 | AN4/RB0 — Analog input 4 / port B bit 0 |
| Pin 22 | AN5/RB1 — Analog input 5 / port B bit 1 |
| Pin 23 | VREF-/CVREF- — ADC reference low / comparator reference low |
| Pin 24 | VREF+/CVREF+ — ADC reference high / comparator reference high |
| Pin 25 | C1IN+/AN6 — Comparator 1 non-inverting input / analog input 6 |
| Pin 26 | C1IN-/AN7 — Comparator 1 inverting input / analog input 7 |
| Pin 27 | C2IN+/AN8 — Comparator 2 non-inverting input / analog input 8 |
| Pin 28 | C2IN-/AN9 — Comparator 2 inverting input / analog input 9 |
| Pin 29 | C3IN+/AN10/RP15 — Comparator 3 non-inverting input / analog input 10 |
| Pin 30 | C3IN-/AN11/RP16 — Comparator 3 inverting input / analog input 11 |
| Pin 31 | C4IN+/AN12/RP17 — Comparator 4 non-inverting input / analog input 12 |
| Pin 32 | C4IN-/AN13 — Comparator 4 inverting input / analog input 13 |
| Pin 33 | OSC1/RC12 — Crystal oscillator input |
| Pin 34 | OSC2/RC15 — Crystal oscillator output |
| Pin 35 | MCLR — Master clear reset (active low) |
| Pin 36 | RP8/RC8 — Remappable I/O / UART1 TX |
| Pin 37 | RP9/RC9 — Remappable I/O |
| Pin 38 | VSS — Ground |
| Pin 39 | VDD — Digital supply voltage (3.0-3.6 V) |
| Pin 40 | PGED1/RP0/RC0 — ICSP data / remappable I/O |
| Pin 41 | PGEC1/RP1/RC1 — ICSP clock / remappable I/O |
| Pin 42 | RP2/RC2 — Remappable I/O / SPI SDO |
| Pin 43 | RP3/RC3 — Remappable I/O / SPI SDI |
| Pin 44 | RP4/RC4 — Remappable I/O / UART2 RX |
Typical Applications
DSPIC33FJ16GS504-I/PT is suitable for 6 applications: AC/DC Power Converters with PFC, Isolated DC/DC Converters (Quarter-Brick), Uninterruptible Power Supplies (UPS), Digital Solar Microinverters and String Inverters, Industrial Switch-Mode Power Supplies, LED Lighting Drivers with Digital Dimming.
AC/DC Power Converters with PFC
The DSPIC33FJ16GS504-I/PT is well-suited to bridgeless and totem-pole PFC stages because it integrates up to four analog comparators with direct paths to PWM fault inputs, enabling cycle-by-cycle current limiting without software latency. Its 12-bit ADC at 1.1 Msps samples input voltage and inductor current fast enough for digital average-current-mode control at 100 kHz. The four high-speed PWM outputs drive the boost switch plus synchronous rectifiers with 1.04 ns edge resolution, minimizing distortion and easing EMI compliance. Compared with a discrete analog PFC + MCU solution, this single-chip approach cuts BOM and improves transient response. A 16 KB Flash / 2 KB SRAM budget supports a complete PFC + housekeeping firmware with digital soft-start, AC-drop detection, and brown-out recovery.
Recommended
Isolated DC/DC Converters (Quarter-Brick)
In isolated quarter-brick intermediate-bus converters (IBC) the DSPIC33FJ16GS504-I/PT executes peak-current-mode control on the primary side and regulates the secondary through a digital isolator feedback path. Its 40 MIPS core supports digital compensation loops (Type-II/Type-III equivalents) at switching frequencies up to 500 kHz, while the high-speed ADC captures the current-sense signal with sub-microsecond latency. Peripheral Pin Select (PPS) lets engineers remap PWM, ADC, and comparator channels to optimize the 44-pin TQFP layout for short analog traces and clean ground returns. The result is a smaller BOM than analog controller plus supervisory MCU designs and a firmware-tunable loop that adapts across input voltage and load.
Recommended
Uninterruptible Power Supplies (UPS)
Online and line-interactive UPS systems use the DSPIC33FJ16GS504-I/PT to manage inverter PWM, battery charging, and AC-line synchronization in a single controller. The four analog comparators protect the inverter from over-current and short-circuit events by triggering hardware PWM shutdown within nanoseconds - critical for safety under load transients. Its on-chip 12-bit ADC digitizes battery voltage, charge current, and AC output waveforms for closed-loop regulation. With 16 KB Flash and 2 KB SRAM the firmware fits a state-machine scheduler plus a small DSP notch filter for harmonic shaping. Industrial-grade -40 C to +85 C operation covers most indoor UPS installations.
Recommended
Digital Solar Microinverters and String Inverters
The DSPIC33FJ16GS504-I/PT's combination of high-speed PWMs, fast ADC, and integrated analog comparators fits single-phase solar microinverter MPPT and grid-tie control. Its DSP engine runs perturb-and-observe or incremental-conductance MPPT loops at the maximum-power-point sampling rate, while the comparators implement anti-islanding detection by sensing AC-line voltage and frequency. Firmware-updatable Flash allows field tuning of grid codes (VDE-AR-N 4105, IEEE 1547) without hardware changes. The 44-pin TQFP package provides enough I/O for the panel-side current sensor, DC-link voltage divider, grid-side relay drivers, and isolated communication UART.
Recommended
Industrial Switch-Mode Power Supplies
Multi-output industrial SMPS modules benefit from the DSPIC33FJ16GS504-I/PT's Peripheral Pin Select flexibility - designers route PWMs, ADC channels, and comparators to optimal PCB locations without package constraints. The device's 40 MIPS core executes digital average-current-mode control across 3-4 output rails at switching frequencies up to 250 kHz, replacing multiple analog PWM controllers with a single firmware-configurable design. Integrated analog comparators implement per-rail over-current protection with hardware latency below 50 ns. Industrial temperature grade and lead-free TQFP-44 packaging support long-life industrial deployments.
Recommended
LED Lighting Drivers with Digital Dimming
Digital LED drivers use the DSPIC33FJ16GS504-I/PT to generate high-resolution PWM dimming and analog current regulation from a single 3.3 V supply. Its four high-speed PWM outputs support multi-channel RGBW or tunable-white LED strings, while the 12-bit ADC reads photodiode or current-sense feedback for closed-loop constant-current operation. The on-chip DSP engine runs color-mixing algorithms and thermal-foldback compensation in real time without burdening the MCU core. Compared with discrete analog LED controllers, this approach enables firmware-defined dimming curves, DMX/RDM networking, and end-of-line calibration with the same hardware.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS504-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS504-H/PT | DSPIC33FJ16GS504-E/PT | DSPIC33FJ16GS504-50I/PT | DSPIC33FJ32GS504-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (PT) | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same |
| Core / Architecture | dsPIC33F 16-bit DSC, 40 MIPS | dsPIC33F 16-bit DSC, 40 MIPS | dsPIC33F 16-bit DSC, 40 MIPS | dsPIC33F 16-bit DSC, 50 MIPS | dsPIC33F 16-bit DSC, 40 MIPS |
| Program Memory (Flash) | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB |
| Data RAM | 2 KB | 2 KB | 2 KB | 2 KB | 4 KB |
| Operating Temperature | -40 to +85 C (I grade) | -40 to +150 C (H grade) | -40 to +125 C (E grade) | -40 to +85 C (I grade) | -40 to +85 C (I grade) |
| Supply Voltage | 3.0 to 3.6 V | 3.0 to 3.6 V | 3.0 to 3.6 V | 3.0 to 3.6 V | 3.0 to 3.6 V |
| PWM Channels | Up to 4 high-speed 10-bit PWM | Up to 4 high-speed 10-bit PWM | Up to 4 high-speed 10-bit PWM | Up to 4 high-speed 10-bit PWM | Up to 4 high-speed 10-bit PWM |
| Analog Comparators | Up to 4 high-speed comparators | Up to 4 high-speed comparators | Up to 4 high-speed comparators | Up to 4 high-speed comparators | Up to 4 high-speed comparators |
Key Differentiators
- Same-package high-temperature grade with -40 to +150 C support (vs DSPIC33FJ16GS504-H/PT)
- Same-package extended-temperature grade (vs DSPIC33FJ16GS504-E/PT)
- Same-package 50 MIPS speed upgrade (vs DSPIC33FJ16GS504-50I/PT)
- Same-package 2x memory upgrade path (vs DSPIC33FJ32GS504-I/PT)
Design Notes
The DSPIC33FJ16GS504-I/PT requires a single 3.0-3.6 V supply on both VDD and AVDD pins. Place one 10 uF bulk capacitor plus one 0.1 uF ceramic decoupling capacitor within 5 mm of each VDD/AVDD pin pair, with the 0.1 uF closer to the IC. Tie all four VSS/AVSS pins to a solid ground pour to minimize digital-return currents under the analog section. Estimated: at 40 MIPS and 3.3 V VDD, the core draws approximately 30-40 mA, so a 100 mA LDO upstream is adequate for headroom.
Route analog inputs (ANx, comparator inputs) on the opposite side of the PCB from PWM switching traces, and surround them with a ground guard ring tied to AVSS. The high-speed PWM outputs have 1.04 ns edge rates - keep the PWM traces short and series-terminate with 33 ohm if the trace exceeds 25 mm to avoid reflections. Place the ADC input RC filter (typically 100 ohm + 1 nF) within 10 mm of the pin. The crystal oscillator traces should be symmetrical and surrounded by a ground guard trace to suppress coupled noise.
The 12-bit ADC achieves 1.1 Msps with proper analog layout - keep the analog reference (VREF+/VREF-) bypassed with 10 uF + 100 nF, and connect VREF- to AVSS at a single point (star-ground). Use Peripheral Pin Select (PPS) to map digital peripherals to pins physically distant from analog inputs. Enable ADC channel scanning in round-robin mode only when necessary; sequential sampling provides better noise performance at the cost of latency. For cycle-by-cycle current sense, route the comparator inputs directly to the dedicated C1IN+/C1IN- pins to bypass the ADC mux.
Three common pitfalls: (1) Do not leave PWM fault inputs FLTA1/FLTB1 floating - tie to VDD through 10 kohm pull-ups if unused, otherwise noise will randomly disable PWM outputs. (2) The MCLR pin requires a 10 kohm pull-up to VDD and a 100 nF cap to ground for clean reset during in-circuit programming. (3) Peripheral Pin Select remapping must be unlocked via the IOLOCK register sequence; without it, PPS pin mapping fails silently in production firmware.
Compliance Information
Lead-free / RoHS compliant per distributor listing. Industrial temperature grade ('I'); AEC-Q100 qualification is NOT applicable to this part - check AEC-Q100 documentation separately. Halogen-free status not explicitly stated in verified web data.
