PIC18F4550-I/ML Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
The PIC18F4550-I/ML is an 8-bit PIC18 microcontroller running at 48 MHz with 32 kB Flash, integrated USB full-speed peripheral, and 13-channel ADC. It delivers a compact solution for USB-connected embedded designs in a 44-pin QFN package. Available from stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 44
- Lifecycle
- ACTIVE
- Datasheet
- PIC18F4550-I/ML Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $5.2900(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 48 MHz CPU with native USB full-speed (12 Mbps) peripheral for single-chip USB interface without external controllers
- 32 kB Flash and 13-channel 10-bit ADC support complex firmware and multi-sensor acquisition in one device
- Compact 44-pin QFN package reduces board footprint compared to equivalent PDIP or TQFP alternatives
Applications
The PIC18F4550-I/ML is widely used in USB HID keyboards, custom USB input devices, and PC-connected data acquisition systems that need simultaneous ADC sampling and USB communication. Industrial automation panels use it to bridge analog sensor data over USB to a host computer without additional USB bridge chips. Its 32 kB Flash capacity also accommodates USB bootloader firmware alongside the application code, simplifying field updates in embedded instruments.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | QFN-44 |
| Factory Lead Time | 5Weeks |
| YTEOL | 9 |
| Has ADC | YES |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC18 |
| Clock Frequency-Max | 48MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | S-PQCC-N44 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of External Interrupts | 3 |
| Number of I/O Lines | 35 |
| Number of Serial I/Os | 1 |
| Number of Timers | 4 |
| On Chip Data RAM Width | 8 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC44,.31SQ,25 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 2048 |
| ROM (words) | 32768 |
| ROM Programmability | FLASH |
| Screening Level | TS 16949 |
| Speed | 48MHz |
| Supply Current-Max | 50mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.2V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.65mm |
| Terminal Position | QUAD |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | 3A991.A.2 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PIC18F4550-I/ML:
suggested
suggested
suggested
suggested
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 48MHz, CMOS, PQCC44
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 48MHz, CMOS, PQCC44
Frequently Asked Questions
How much Flash and RAM does the PIC18F4550-I/ML provide for firmware and runtime data?
The PIC18F4550-I/ML includes 32 kB of Flash program memory and 2 kB of SRAM data memory, which is sufficient to host a full USB HID class firmware stack alongside application logic and a small USB bootloader for in-field firmware updates.
What ADC resolution and channel count does PIC18F4550-I/ML offer for sensor applications?
The device integrates a 13-channel, 10-bit ADC capable of sampling multiple analog sensor signals in a single scan cycle at 48 MHz clock, making it suitable for temperature, pressure, and light sensor nodes that need to relay readings over USB at high update rates.
How does the 44-pin QFN package benefit compact PCB designs compared to 40-pin DIP?
The QFN-44 package measures approximately 8 mm x 8 mm with 0.8 mm pitch, compared to a 40-pin DIP that requires over 50 mm of board length, allowing the PIC18F4550-I/ML to fit on space-constrained USB dongle and handheld designs where DIP packages are impractical.
When is PIC18F4550-I/ML the better pick over PIC18F2550 for a motor feedback panel?
PIC18F4550-I/ML is preferred when the design needs more than 25 I/O pins and the full 13 ADC input channels available in the 44-pin package, as PIC18F2550 in a 28-pin package provides only 10 ADC channels and fewer than 20 GPIO lines for concurrent encoder, analog, and USB tasks.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $7.3700 | $7.37 |
| 25+ | $6.3800 | $159.50 |
| 50+ | $6.3400 | $317.00 |
| 100+ | $6.0400 | $604.00 |
| 1000+ | $5.5700 | $5570.00 |
| 5000+ | $5.2900 | $26450.00 |
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