PIC18LF4550-I/ML Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
The PIC18LF4550-I/ML is an 8-bit PIC18 low-power XLP microcontroller from Microchip with 32 KB Flash, 48 MHz clock, integrated ADC, and USB, housed in a compact QFN-44 package operable from as low as 2 V at 4 MHz. Available from stock worldwide.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 44
- Lifecycle
- ACTIVE
- Datasheet
- PIC18LF4550-I/ML Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $5.5300(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
- 8-bit PIC18 XLP core running up to 48 MHz for high-performance low-power processing
- 32 KB Flash program memory for storing complex firmware and communication stacks
- Integrated USB full-speed controller enabling direct PC connectivity without external USB PHY
- Integrated ADC for multi-channel analog signal acquisition
- XLP (eXtreme Low Power) technology for ultra-low sleep current in battery applications
- Operates down to 2 V at 4 MHz for single-cell battery and energy-harvesting designs
Applications
The PIC18LF4550-I/ML is well-suited for USB-connected embedded applications such as HID game controllers, custom USB peripherals, data loggers, and medical USB interfaces that require an 8-bit core with ample 32 KB Flash. Its XLP technology makes it equally attractive for battery-powered IoT nodes and portable measurement instruments where sleep current must stay in the nanoampere range. The 44-pin QFN package supports high pin-count requirements in compact PCB layouts for wearable and handheld device designs.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | QFN-44 |
| Factory Lead Time | 5Weeks |
| YTEOL | 9 |
| Has ADC | YES |
| Additional Feature | ALSO OPERATES AT MINIMUM 2V AT 4MHZ |
| 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 | 16 |
| 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) | 16384 |
| 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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Does the PIC18LF4550-I/ML include a USB controller, and what does that enable in firmware design?
Yes, the PIC18LF4550-I/ML integrates a full-speed USB controller directly on-chip, allowing firmware developers to implement USB HID, CDC, or custom device classes without adding an external USB bridge IC, saving BOM cost and board space in USB peripheral designs.
How does the PIC18LF4550-I/ML's 2 V minimum supply voltage benefit portable device designs?
By operating correctly down to 2 V at 4 MHz, the PIC18LF4550-I/ML can run directly from a partially discharged single-cell alkaline or LiFePO4 battery, extending useful product runtime in portable data loggers, wearables, and handheld instruments before triggering a low-battery shutdown.
How does 32 KB Flash on the PIC18LF4550-I/ML compare to smaller PIC18 variants for complex firmware projects?
With 32 KB of Flash, the PIC18LF4550-I/ML provides four times the program space of a 8 KB entry-level PIC18, accommodating full USB stacks, RTOS kernels, and multi-protocol communication firmware alongside application logic — making it appropriate for mid-complexity 8-bit embedded projects.
Related Guides
How to Choose a 3528 SMD Indicator LED for Blue Status Lighting: Selection Guide
A practical 3528 SMD indicator LED selection guide using 150141BS73100 and related Wurth 150141 variants for blue status lighting.
Jul 5, 2026
BAS70KFILM Design Guide for Low-Leakage Signal Clamping and RF Detector Inputs
Practical BAS70KFILM design guidance for signal clamps, RF detector inputs, leakage control, capacitance, layout, and sourcing alternatives.
Jul 5, 2026
How to Choose a BAS70 Schottky Diode for Signal Clamping: Selection Guide
A practical BAS70KFILM and BAS70-family Schottky diode selection guide for signal clamping, RF detection, leakage, and topology choices.
Jul 4, 2026
AMC1202DWVR Design Guide for Isolated Current Sensing
Practical AMC1202DWVR design guide covering shunt sizing, isolation layout, input filtering, ADC scaling, and sourcing choices.
Jul 4, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $7.7100 | $7.71 |
| 5+ | $6.7686 | $33.84 |
| 100+ | $6.3300 | $633.00 |
| 1000+ | $5.8200 | $5820.00 |
| 5000+ | $5.5300 | $27650.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”