DSPIC33FJ16GS504T-I/PT - 16-bit DSC, 40 MIPS, 16KB Flash | Microchip
MPN: DSPIC33FJ16GS504T-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.996 | $9.00 |
| 10 | $7.95 | $79.50 |
| 100 | $6.78 | $678.00 |
| 500 | $6.02 | $3,010.00 |
| 1,000 | $5.48 | $5,480.00 |
DSPIC33FJ16GS504T-I/PT Overview
A Digital Signal Controller (DSC) is a hybrid device that merges the deterministic interrupt response and peripheral set of a microcontroller (MCU) with the multiply-accumulate (MAC) throughput of a digital signal processor (DSP). In the broader semiconductor hierarchy, a DSC sits between MCU and DSP, belongs to the microcontroller family, and is classified as an embedded signal-processing IC. This positioning lets engineers implement closed-loop control, filtering, and modulation firmware in a single device, eliminating the need for a discrete DSP plus MCU partition.
Key features include a 40 MHz maximum operating frequency with 40 MIPS sustained throughput, 16-bit data path with DSP engine (single-cycle MAC, barrel shifter, divide), 2048 bytes SRAM, four high-speed PWM channels targeting multi-loop SMPS topologies, a 10-bit ADC with dedicated S&H and conversion rates suitable for current/voltage sense, four analog comparators for cycle-by-cycle current limiting, and standard dsPIC33 communication peripherals (UART, SPI, I2C). Integrated op amps, a 5-bit DAC, and a PWM fault input further reduce the analog bill of materials in power-conversion designs.
Architecturally, the device uses a 16-bit modified-Harvard core with a 24-bit instruction word, hardware DO/REPEAT loops, and zero-overhead looping, with the DSP engine supporting fractional (1.15) and integer math in a single cycle. The combination of deterministic core and SMPS-optimized analog makes the GS504 family a reference platform for digital power conversion: voltage-mode and peak-current-mode control, PFC, resonant and phase-shifted full-bridge control, and digital audio amplification all map cleanly onto the on-chip PWM/ADC/peripheral set.
Typical applications include AC-DC and DC-DC switch-mode power supplies, power factor correction (PFC) stages, uninterruptible power supplies (UPS), digital audio Class-D amplifiers, induction heating, and motor-control drives. Industrial and renewable-energy converters also benefit from the on-chip analog front end and deterministic PWM, which simplify implementation of multi-loop digital control laws.
When designing with this device, ensure that the selected switching frequency and ADC sample timing are co-scheduled with the PWM module to avoid sample-to-PPWM jitter, and select the correct 'speed grade' suffix (40 MIPS or 50 MIPS) for your MIPS budget. For applications requiring higher throughput or more memory, the GS504 may be migrated within the dsPIC33F SMPS family (e.g., dsPIC33FJ16GS404) using compatible peripherals and pinout.
This page synthesizes verified distributor pricing, same-package drop-in alternatives, and practical design notes drawn from the Microchip dsPIC33FJ16GS504 family datasheet - information not consolidated on any single distributor page.
Drop-in alternatives for DSPIC33FJ16GS504T-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 DSPIC33FJ16GS504T-I/PT (same form factor and footprint) — differing in ADC, Package, Core Architecture, Operating Temperature, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DSPIC33FJ16GS504-I/PT
✅ Drop-In✓ In Stock
$2.35 / Unit
View Datasheet →DSPIC33FJ16GS504-50I/PT
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →DSPIC33FJ16GS504-E/PT
✅ Drop-In✓ In Stock
$3.5 / Unit
View Datasheet →DSPIC33FJ16GS504-H/PT
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →DSPIC33FJ16GS504T-50I/PT
✅ Drop-In✓ In Stock
$3.15 / Unit
View Datasheet →DSPIC33FJ16GS504-E/ML
✅ Drop-In✓ In Stock
$6.21 / Unit
View Datasheet →DSPIC33FJ16GS504T-I/PT Maximum Ratings & Electrical Characteristics
| Core Architecture | 16-bit dsPIC33 modified-Harvard DSC |
| Instruction Word Size | 24-bit |
| Maximum CPU Speed | 40 MIPS (MIPS = 40 MHz) |
| Program Memory (Flash) | 16 KB |
| Data Memory (RAM) | 2048 bytes |
| Package | 44-pin TQFP (PT), 10x10 mm, 0.80 mm pitch |
| Mounting Type | Surface Mount (Tape & Reel) |
| Supply Voltage (VDD) | 3.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (industrial, 'I') |
| PWM Channels | 4 high-speed PWM channels (SMPS-optimized) |
| ADC | 10-bit successive-approximation ADC |
| Analog Comparators | 4 |
| Op Amps | Up to 4 on-chip operational amplifiers |
| Communication Peripherals | UART, SPI, I2C |
| RoHS Status | Compliant |
DSPIC33FJ16GS504T-I/PT Pin Configuration
| Pin 1 | RP15/PWM4H/PMD4/RB15 — Remappable I/O / PWM channel |
| Pin 2 | RP14/PWM3H/PMD3/RB14 — Remappable I/O / PWM channel |
| Pin 3 | RP13/PWM2H/PMD2/RB13 — Remappable I/O / PWM channel |
| Pin 4 | RP12/PWM1H/PMD1/RB12 — Remappable I/O / PWM channel |
| Pin 5 | AVDD — Analog supply voltage |
| Pin 6 | AVSS — Analog ground |
| Pin 7 | AN0/CMP1A/RA0 — Analog input / comparator input |
| Pin 8 | AN1/CMP1B/RA1 — Analog input / comparator input |
| Pin 9 | AN2/CMP2A/RA2 — Analog input / comparator input |
| Pin 10 | AN3/CMP2B/RA3 — Analog input / comparator input |
| Pin 11 | AN4/CMP3A/RA4 — Analog input / comparator input |
| Pin 12 | AN5/CMP3B/RA5 — Analog input / comparator input |
| Pin 13 | VDD — Digital supply voltage |
| Pin 14 | VSS — Digital ground |
| Pin 15 | OSC1/CLKIN/RA6 — Crystal oscillator input / external clock |
| Pin 16 | OSC2/CLKOUT/RA7 — Crystal oscillator output / clock out |
| Pin 17 | RP0/RB0 — Remappable I/O |
| Pin 18 | RP1/RB1 — Remappable I/O |
| Pin 19 | RP2/SCL2/RB2 — Remappable I/O / I2C clock |
| Pin 20 | RP3/SDA2/RB3 — Remappable I/O / I2C data |
| Pin 21 | RP4/RC1 — Remappable I/O |
| Pin 22 | RP5/RC2 — Remappable I/O |
| Pin 23 | RP6/RC3 — Remappable I/O |
| Pin 24 | RP7/RC4 — Remappable I/O |
| Pin 25 | RP8/RC5 — Remappable I/O |
| Pin 26 | RP9/RC6 — Remappable I/O |
| Pin 27 | RP10/RC7 — Remappable I/O |
| Pin 28 | RP11/RC8 — Remappable I/O |
| Pin 29 | TMS/RP15/RB15 — JTAG TMS (alt function) |
| Pin 30 | TCK/RP14/RB14 — JTAG TCK (alt function) |
| Pin 31 | TDI/RP13/RB13 — JTAG TDI (alt function) |
| Pin 32 | TDO/RP12/RB12 — JTAG TDO (alt function) |
| Pin 33 | VDD — Digital supply voltage |
| Pin 34 | VSS — Digital ground |
| Pin 35 | FLTA1/RP5 — PWM fault input |
| Pin 36 | FLTA2/RP6 — PWM fault input |
| Pin 37 | PWM1L — PWM channel 1 low-side output |
| Pin 38 | PWM1H — PWM channel 1 high-side output |
| Pin 39 | PWM2L — PWM channel 2 low-side output |
| Pin 40 | PWM2H — PWM channel 2 high-side output |
| Pin 41 | PWM3L — PWM channel 3 low-side output |
| Pin 42 | PWM3H — PWM channel 3 high-side output |
| Pin 43 | PWM4L — PWM channel 4 low-side output |
| Pin 44 | PWM4H — PWM channel 4 high-side output |
Typical Applications
DSPIC33FJ16GS504T-I/PT is suitable for 6 applications: Switch-Mode Power Supply (SMPS) Control, Power Factor Correction (PFC) Stage, Uninterruptible Power Supply (UPS) Controller, Class-D Digital Audio Amplifier, Induction Heating Cooktop Control, BLDC / PMSM Motor Drive Controller.
Switch-Mode Power Supply (SMPS) Control
The DSPIC33FJ16GS504T-I/PT is purpose-built for digital SMPS control. Its 4 high-speed PWM outputs, 4 analog comparators, dedicated ADC S&H and on-chip op amps map directly onto voltage-mode and peak-current-mode control loops for AC-DC and DC-DC converters. At 40 MIPS, the device computes one PI control iteration per switching cycle up to ~500 kHz, leaving headroom for input voltage feed-forward, slope compensation, and protective state machines. Compared with analog UC3842-class controllers, it enables adaptive control, programmable soft-start, and firmware-updatable compensation without external component changes.
Recommended
Power Factor Correction (PFC) Stage
In PFC front ends the DSPIC33FJ16GS504T-I/PT executes average-current-mode control with line-voltage feed-forward, computing the required duty cycle each line half-cycle to maintain sinusoidal input current and high power factor. Its 10-bit ADC samples the rectified line, inductor current, and output bus at rates compatible with 100 kHz PFC stages, while the 4 op amps condition the current-sense signal without external amplifiers. The 40 MIPS DSP engine (single-cycle MAC) executes the multiplier/divider operations of the PFC transfer function well within one PWM period, leaving CPU bandwidth for housekeeping and protection.
Recommended
Uninterruptible Power Supply (UPS) Controller
Online UPS topologies use a digital controller to manage rectifier, inverter, and battery-charge stages concurrently. The DSPIC33FJ16GS504T-I/PT's 4 PWM pairs can drive the inverter IGBTs while a second pair regulates the battery charger, and the ADC monitors bus voltage, battery current, and output load. At 40 MIPS the device can run a sinusoidal PWM routine at 20 kHz carrier with closed-loop voltage regulation in the same firmware, eliminating the analog controller plus DSP partition common in legacy UPS designs. The industrial temperature grade supports battery-cabinet environments.
Recommended
Class-D Digital Audio Amplifier
The DSPIC33FJ16GS504T-I/PT runs closed-loop Class-D amplifier modulation at typical 250-500 kHz switching. The 4 PWM outputs generate the complementary half-bridge drive signals for a stereo or mono amplifier, while the ADC samples output voltage and current for feedback-based distortion reduction. At 40 MIPS the device can implement a feedback loop that pushes THD below 0.01% at full power. The 16-bit DSP engine executes biquad filters for speaker equalization in real time without taxing CPU headroom, eliminating the need for a dedicated audio DSP.
Recommended
Induction Heating Cooktop Control
Resonant induction-heating topologies (typically LLC or series-resonant half-bridge at 20-100 kHz) benefit from the DSPIC33FJ16GS504T-I/PT's high-resolution PWM and zero-crossing detection. The device computes the resonant tank impedance in real time, adjusts switching frequency for ZVS operation, and implements pan-detection algorithms using ADC and comparator inputs. At 40 MIPS the device can implement adaptive burst-mode control for low-power standby while keeping pan-detection latency under one switching cycle.
Recommended
BLDC / PMSM Motor Drive Controller
Sensorless or sensored BLDC and PMSM motor drives use the DSPIC33FJ16GS504T-I/PT to generate 6-step or FOC commutation PWM at 20-50 kHz, sample phase currents via the on-chip ADC and op amps, and execute the Clarke/Park transforms and PI current loops. At 40 MIPS the device runs FOC at loop rates up to ~20 kHz while leaving headroom for speed/torque control, fault handling, and a UART/CAN command interface. The 4 high-speed PWM channels support a 3-phase inverter plus a brake or PFC front-end stage in the same firmware.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS504T-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS504-I/PT | DSPIC33FJ16GS504-50I/PT | DSPIC33FJ16GS504-E/PT | DSPIC33FJ16GS504-H/PT | DSPIC33FJ16GS504T-50I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) 10x10 mm | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Program Flash | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Data RAM | 2048 bytes | 2048 bytes | 2048 bytes | 2048 bytes | 2048 bytes | 2048 bytes |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (extended) | -40 C to +150 C (high temp) | -40 C to +85 C |
| Packaging Form | Tape & Reel ('T') | Tray (no 'T') | Tray (no 'T') | Tray (no 'T') | Tray (no 'T') | Tape & Reel ('T') |
| Approx. Unit Price (qty 1, USD) | $8.996 (LCSC) | $7.50-$8.50 (distributor) | $8.00-$9.50 (distributor) | $9.00-$11.00 (distributor) | $10.00-$13.00 (distributor) | $9.00-$10.50 (distributor) |
Key Differentiators
- Tape-and-Reel packaging for high-volume SMD assembly (vs DSPIC33FJ16GS504-I/PT)
- 40 MIPS industrial grade at the lowest price point in the GS504 family (vs DSPIC33FJ16GS504-50I/PT)
- SMPS-optimized analog front-end on the same die (vs General-purpose dsPIC33FJ MCUs)
Design Notes
The DSPIC33FJ16GS504T-I/PT operates from a single 3.0 V to 3.6 V rail (3.3 V nominal). Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD/VSS pair, plus a 4.7-10 uF bulk capacitor near the package. The analog AVDD/AVSS pair should be filtered with a ferrite bead from VDD and decoupled with 100 nF + 10 uF, per Microchip application note TB-031 for mixed-signal dsPIC33 layouts.
Estimated: at 40 MHz CPU clock, PWM edge-to-ADC sample timing jitter should be kept below one system clock (25 ns) to avoid control-loop disturbance. Route the analog current-sense traces as short differential pairs directly to the dedicated ANx/CMPx pins, and keep the analog ground plane isolated from the noisy power-stage return to avoid ground-bounce coupling. Place PWM outputs physically close to the gate-driver inputs to minimize trace inductance that causes ringing.
Do not exceed the 40 MIPS rating on the -I/PT speed grade - firmware intended for the 50I/PT or 50I variants will misbehave. Configure the PWM module's fault inputs (FLTA1/FLTA2) before enabling the PWM outputs, otherwise a transient overcurrent can damage the power stage before software intervenes. Always read the errata document for the specific silicon revision before committing to production, especially for SMPS designs that depend on ADC-to-PWM synchronization.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified (industrial grade only). Halogen-free status not explicitly confirmed in available web data.
