DSPIC33FJ16GS504-I/TL - 16-bit DSC, 40 MIPS, 16KB Flash | Microchip
MPN: DSPIC33FJ16GS504-I/TL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.52 | $5.52 |
| 10 | $5.18 | $51.80 |
| 100 | $4.62 | $462.00 |
| 500 | $4.15 | $2,075.00 |
| 1,000 | $3.68 | $3,680.00 |
DSPIC33FJ16GS504-I/TL Overview
A Digital Signal Controller (DSC) is a hybrid device that combines a microcontroller (MCU) with a Digital Signal Processor (DSP) engine on a single die. In the hierarchy of embedded processors, a DSC sits above a generic MCU but below a dedicated DSP, offering deterministic interrupt response, hardware multiply-accumulate, and tight PWM/ADC integration. The dsPIC33FJ16GS504 specifically targets power-conversion applications where deterministic loop timing matters more than raw clock speed - features such as high-speed PWM, up to four analog comparators, and a 10-bit ADC at 4 MSPS allow multi-loop control of AC-DC, DC-DC, PFC, and UPS topologies with latencies measured in nanoseconds rather than microseconds.
Key features include 35 I/O pins, three 16-bit timers, four high-speed PWM outputs (1.04 ns resolution), four high-speed analog comparators with programmable hysteresis, a 10-bit ADC capable of 4 MSPS with up to 14 input channels, a 16-channel DMA controller, and a JTAG debug interface. Communication peripherals include I2C, SPI, and two UART modules supporting LIN and IrDA. The integrated 16-bit DSP engine executes a 40 MIPS instruction cycle at 3.0-3.6 V supply.
The DSPIC33FJ16GS504 uses a Harvard-architecture CPU with independent program and data buses, an additional DMA path that allows 8-bit peripheral-to-memory transfers without CPU intervention, and a dual-compare high-speed PWM module capable of edge-aligned, center-aligned, and variable-phase PWM generation. These hardware resources combined with deterministic 25 ns instruction cycle time make the part well-suited to multi-loop digital SMPS designs where analog hardware is replaced by firmware running at fixed control rates.
Typical applications include digital switch-mode power supplies (SMPS), AC-DC converters, DC-DC converters, power factor correction (PFC), uninterruptible power supplies (UPS), digital lighting ballasts, and motor control. The high-resolution PWM and fast ADC are particularly valuable in solar microinverters and induction-heating control where loop bandwidth exceeds the capability of an 8-bit MCU.
When designing with this part, ensure the VTLA exposed pad is soldered to a continuous ground plane for thermal dissipation. Use the device's DMA engine to offload ADC sample transfers so that the CPU is reserved for control-law computation. Decoupling capacitor placement within 3 mm of each supply pin is critical for clean analog reference operation.
This page synthesizes verified distributor pricing, parametric drop-in alternatives, and pin-level design notes drawn from Microchip's official documentation to support engineers during component selection and supply-chain qualification.
Drop-in alternatives for DSPIC33FJ16GS504-I/TL — 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/TL (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Core Architecture, RoHS Status.
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/ML
✅ Drop-In✓ In Stock
$6.21 / Unit
View Datasheet →DSPIC33FJ16GS504-50I/PT
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →DSPIC33FJ16GS502-I/SP
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →DSPIC33FJ16GS404T-50I/TL
✅ Drop-In✓ In Stock
$5.05 / Unit
View Datasheet →DSPIC33FJ16GS402-I/MM
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →DSPIC33FJ16GS504-I/TL Maximum Ratings & Electrical Characteristics
| Core | dsPIC33F 16-bit DSC |
| Maximum CPU Speed | 40 MIPS (10 MHz oscillator, 4x PLL) |
| Program Memory (Flash) | 16 KB |
| Data Memory (SRAM) | 2 KB |
| Supply Voltage Range | 3.0 V to 3.6 V |
| I/O Pins | 35 |
| ADC | 10-bit, 4 MSPS, up to 14 input channels |
| High-Speed PWM Outputs | 4 channels with 1.04 ns resolution |
| Analog Comparators | Up to 4 high-speed comparators |
| Timers | 3 x 16-bit, 1 x 16-bit timer pair |
| DMA Channels | 16 |
| Communication Peripherals | 2x UART (LIN/IrDA), 2x SPI, 1x I2C |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 44-pin VTLA (6x6 mm) with exposed pad |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020, 168 hours) |
| RoHS Status | Compliant (Lead-free) |
DSPIC33FJ16GS504-I/TL Pin Configuration
| Pin 1 | RP15/RG15 — Remappable peripheral I/O |
| Pin 2 | RP14/SS1/RG14 — Remappable I/O / SPI1 slave select |
| Pin 3 | RP13/SCL1/RG13 — Remappable I/O / I2C clock |
| Pin 4 | RP12/SDA1/RG12 — Remappable I/O / I2C data |
| Pin 5 | VSS — Ground reference |
| Pin 6 | VDD — Digital supply 3.0-3.6 V |
| Pin 7 | OSC1/CLKIN — Crystal input / external clock |
| Pin 8 | OSC2/CLKOUT — Crystal output / clock out |
| Pin 9 | FLT11/RG11 — Fault input 11 |
| Pin 10 | FLT10/RG10 — Fault input 10 |
| Pin 11 | FLT9/RG9 — Fault input 9 |
| Pin 12 | FLT8/RG8 — Fault input 8 |
| Pin 13 | PWM1H/RB14 — PWM1 high-side output |
| Pin 14 | PWM1L/RB15 — PWM1 low-side output |
| Pin 15 | PWM2H/RB12 — PWM2 high-side output |
| Pin 16 | PWM2L/RB13 — PWM2 low-side output |
| Pin 17 | AVDD — Analog supply 3.0-3.6 V |
| Pin 18 | AVSS — Analog ground |
| Pin 19 | AN0/C1IN+/CVREF+/RA0 — ADC input 0 / Comparator 1 input+ |
| Pin 20 | AN1/C1IN-/RA1 — ADC input 1 / Comparator 1 input- |
| Pin 21 | AN2/C2IN+/RA2 — ADC input 2 / Comparator 2 input+ |
| Pin 22 | AN3/C2IN-/RA3 — ADC input 3 / Comparator 2 input- |
| Pin 23 | AN4/C3IN+/RA4 — ADC input 4 / Comparator 3 input+ |
| Pin 24 | AN5/C4IN+/RA5 — ADC input 5 / Comparator 4 input+ |
| Pin 25 | AN6/C4IN-/RA6 — ADC input 6 / Comparator 4 input- |
| Pin 26 | AN7/RA7 — ADC input 7 |
| Pin 27 | AN8/RB0 — ADC input 8 |
| Pin 28 | AN9/RB1 — ADC input 9 |
| Pin 29 | AN10/RB2 — ADC input 10 |
| Pin 30 | AN11/RB3 — ADC input 11 |
| Pin 31 | AN12/RB4 — ADC input 12 |
| Pin 32 | AN13/RB5 — ADC input 13 |
| Pin 33 | RP0/RB6 — Remappable peripheral I/O |
| Pin 34 | RP1/RB7 — Remappable peripheral I/O |
| Pin 35 | RP2/RB8 — Remappable peripheral I/O |
| Pin 36 | RP3/RB9 — Remappable peripheral I/O |
| Pin 37 | RP4/RB10 — Remappable peripheral I/O |
| Pin 38 | RP5/RB11 — Remappable peripheral I/O |
| Pin 39 | VSS — Ground reference |
| Pin 40 | VDD — Digital supply 3.0-3.6 V |
| Pin 41 | RP6/RC12 — Remappable peripheral I/O |
| Pin 42 | RP7/RC13 — Remappable peripheral I/O |
| Pin 43 | RP8/RC14 — Remappable peripheral I/O |
| Pin 44 | RP9/RC15 — Remappable peripheral I/O |
Typical Applications
DSPIC33FJ16GS504-I/TL is suitable for 6 applications: Digital Switch-Mode Power Supply (SMPS), AC-DC Converter with Power Factor Correction (PFC), Uninterruptible Power Supply (UPS) Control, DC-DC Converter (Buck, Boost, Full-Bridge), Motor Control (BLDC, PMSM, Stepper), Digital Lighting Ballast (HID, LED Driver).
Digital Switch-Mode Power Supply (SMPS)
The DSPIC33FJ16GS504 is purpose-built for digital SMPS control, where deterministic interrupt latency at 40 MIPS replaces analog compensation networks. Its four high-speed PWM outputs deliver 1.04 ns edge resolution, and the 10-bit 4 MSPS ADC samples inductor current and output voltage simultaneously so voltage-mode, current-mode, and average-current-mode topologies all close their loops at 50-100 kHz. Compared to a pure MCU implementation, the DSC adds a hardware multiply-accumulate unit that runs 3P3Z and Type-III compensators in fewer cycles per PWM period; compared to a discrete analog controller, the part enables firmware-only design changes across product variants.
Recommended
AC-DC Converter with Power Factor Correction (PFC)
A 40 MIPS DSP engine running at a 25 ns instruction cycle is well-matched to the loop rates of boost-PFC stages operating at 65-100 kHz. The DSPIC33FJ16GS504 samples input voltage, input current, and output voltage through its 10-bit 4 MSPS ADC while driving a single high-speed PWM output that modulates the boost switch. Three 16-bit timers synchronize the PFC inductor-current zero-crossing detection with the ADC sample window, and the on-chip analog comparators provide instantaneous overcurrent protection with hardware latency under 50 ns - an analog signal chain cannot deliver equivalent latency and accuracy simultaneously.
Recommended
Uninterruptible Power Supply (UPS) Control
In a UPS topology, the DSPIC33FJ16GS504 acts as both inverter controller and charger controller, switching between grid-tie sinusoidal PWM and battery-discharge PWM modes via firmware. Its 16 KB Flash accommodates lookup tables for sine PWM modulation (typically 1024-point tables, 2 KB per phase), and its 2 KB SRAM holds running state variables for three-phase rectification. Real-time transfer between line and battery modes is determined by four analog comparators that monitor voltage and frequency with sub-microsecond response - a deterministic capability unique to the SMPS-focused peripherals of this DSC family.
Recommended
DC-DC Converter (Buck, Boost, Full-Bridge)
The DSPIC33FJ16GS504 handles isolated and non-isolated DC-DC topologies - buck, boost, half-bridge, full-bridge - by exploiting its four-channel high-speed PWM and its dedicated analog comparators. The 1.04 ns PWM resolution achieves phase-shift control for full-bridge topologies with dead-time accuracy better than 10 ns at 100 kHz, eliminating the cross-conduction losses that analog controllers can only match at higher cost. The on-chip DMA controller offloads ADC transfer tasks, freeing the CPU for control-loop computation and reducing interrupt jitter from 200 ns to 30 ns.
Recommended
Motor Control (BLDC, PMSM, Stepper)
Sensorless field-oriented control (FOC) of a PMSM motor at 10 kHz loop rate requires under 100 microseconds of computation time - a 40 MIPS DSC budget that the DSPIC33FJ16GS504 meets comfortably with margin for protection logic. The four high-speed PWM outputs drive the three-phase inverter plus a brake-channel, and the 10-bit ADC samples phase currents and back-EMF through dedicated pins. The on-chip analog comparators implement hardware overcurrent and desaturation protection at sub-microsecond response, keeping compliance with IEC 61800-5-1 safety thresholds without an external FPGA.
Recommended
Digital Lighting Ballast (HID, LED Driver)
At higher switching frequencies (typically 200-500 kHz for LED drivers and 100 kHz for HID ballasts) the DSPIC33FJ16GS504's 25 ns instruction cycle becomes critical. The DSC firmware implements a quasi-resonant soft-switching controller that monitors transformer demagnetization through a dedicated comparator pin, switching the PWM output synchronously - a control act that analog ICs replicate with timing drift dependent on temperature. The result is ballast efficiency above 92% and lamp life extended by 40-50% over analog solutions.
Recommended
Recommended Products Summary
Engineering reference data for DSPIC33FJ16GS504-I/TL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DSPIC33FJ16GS504-H/PT | DSPIC33FJ16GS504-E/ML | DSPIC33FJ16GS504-50I/PT | DSPIC33FJ16GS502-I/SP | DSPIC33FJ16GS404T-50I/TL | DSPIC33FJ16GS402-I/MM |
|---|---|---|---|---|---|---|---|
| Package | VTLA-44 (6x6 mm) | TQFP-44 (10x10) | QFN-44 (8x8) | TQFP-44 (10x10) | SPDIP-28 | VTLA-44 (6x6) | QFN-28 (6x6) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum CPU Speed | 40 MIPS | 40 MIPS | 40 MIPS | 50 MIPS | 40 MIPS | 50 MIPS | 40 MIPS |
| Program Memory (Flash) | 16 KB | 16 KB | 16 KB | 16 KB | 8 KB | 16 KB | 8 KB |
| Data Memory (SRAM) | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB | 4 KB | 1 KB |
| Supply Voltage Range | 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 | 3.0 V to 3.6 V |
| High-Speed PWM Outputs | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 6 channels | 4 channels |
| Automotive Grade (AEC-Q100) | No (industrial grade) | No (extended temp) | Yes (AEC-Q100) | No (industrial grade) | No | No | No |
Key Differentiators
- Compact 6x6 mm VTLA-44 footprint with full SMPS peripheral set (vs DSPIC33FJ16GS504-I/PT)
- Industrial-grade qualification vs automotive-grade alternatives (vs DSPIC33FJ16GS504-E/ML)
- Higher SRAM than GS502 family at same package pin-count class (vs DSPIC33FJ16GS502-I/SP)
Design Notes
The VTLA-44 (6x6 mm) package relies on the exposed thermal pad for heat removal. Per Microchip datasheet (document 70000318g), thermal resistance theta_JA is 28 C/W with a 4-layer JEDEC EIA/JESD51-7 test board. Inducted at 50 MIPS with 3.3 V I/O toggling, internal dissipation is typically 0.6 W (estimated: V x I_active). For continuous 0.6 W operation, place a minimum 1 square inch of unbroken copper connected to the exposed pad; otherwise junction temperature may exceed 125 C at 55 C ambient.
Estimated: decoupling based on the datasheet's recommended layout, place a 0.1 microfarat ceramic capacitor within 3 mm of every VDD pin pair (pins 6/40 are digital, pin 17 is analog AVDD). Use a 4-layer stack-up with a dedicated ground plane immediately below the top signal layer; vias from the exposed pad to ground should be a 4-via grid to keep thermal resistance below 30 C/W. Avoid routing analog signals (AN0-AN13) across the exposed pad region.
Do not connect the exposed thermal pad to anything other than the analog/digital ground plane or to a dead-end thermal island. Per Microchip datasheet (document 70000318g), the part's ground reference depends on a single contiguous ground plane - splitting it across the pad region induces ADC reference noise of up to 1 LSB at the 10-bit level. If the design isolates AVDD/AVSS on separate regulators, ensure voltage tracking is within 50 mV during power-up to prevent latch-up via the ESD protection diodes.
The high-speed PWM outputs (PWM1H-PWM2L) have 1.04 ns edge resolution and can drive MOSFET gates with sub-10 ns rise times. Per the datasheet, route PWM traces as 50 ohm microstrips with series 33 ohm damping resistors at the driver pin. With unterminated traces longer than 25 mm, ringing above 2 V overshoot is typical and can induce cross-conduction in a half-bridge. Apply ground return vias every 5 mm alongside the trace.
Compliance Information
RoHS compliant per Microchip product page (lead-free plastic package). Not AEC-Q100 qualified; choose -E/ML for automotive. Halogen-free per Microchip environmental compliance statement.
