PIC18LF46K42-I/ML - 64KB Flash 8-Bit MCU, 64MHz, 44-QFN | Microchip
MPN: PIC18LF46K42-I/ML ✓ Hoạt độngPIC18LF46K42-I/ML Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash), volatile data memory (RAM), and a rich set of programmable peripherals on a single die. Within the broader hierarchy, MCUs belong to the embedded computing category alongside microprocessors (MPUs) and digital signal controllers (DSCs); the PIC18F family sits in the mid-range performance tier of Microchip's PIC portfolio, above baseline PIC10/12/16 parts and below the dsPIC and 32-bit PIC32 lines. The "LF" prefix denotes the 1.8V-3.6V low-voltage variant of the F-series, optimized for battery-powered designs.
Key features of the PIC18LF46K42-I/ML include: a 12-bit ADC2 with up to 35 external channels and hardware Capacitive Voltage Divider (CVD) for touch sensing, two I2C/SPI/UART interfaces, two DMA channels, vector interrupts, multiple PWM modules, comparators and a 5-bit DAC, plus eXLP (XLP) ultra-low-power technology with operation in Sleep. The 44-QFN package provides 36 user I/O pins in an 8x8 mm footprint, enabling compact PCB layouts for space-constrained applications.
Technically, the device uses CMOS process technology, supports MIPS-rated instruction throughput (16 MIPS at 64 MHz), and integrates core-independent peripherals (CIPs) that execute logic without CPU intervention. The 12-bit ADC2 features automated post-processing, oversampling, averaging, and threshold comparison, reducing firmware overhead. According to the manufacturer datasheet (DS40001919B), the part supports in-circuit debugging via Microchip's MPLAB ecosystem.
Typical applications include IoT sensor nodes, capacitive touch user interfaces, low-power motor control, USB HID bridges with external PHY, battery-powered medical devices, and home automation controllers. The vector interrupt controller and DMA support real-time response without CPU bottleneck.
When designing, ensure bypass capacitance of at least 0.1 uF plus bulk capacitance close to the VDD pins, and review the 44-QFN land pattern recommendations in the package outline. For migration from PIC18F46K42 to PIC18LF46K42, note the LF variant's lower VDD range (1.8V-3.6V vs. 2.3V-5.5V).
This page synthesizes distributor pricing across 8+ channels, drop-in alternatives within the PIC18 K42 family, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF46K42-I/ML — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF46K42-I/ML (cùng hình factor và footprint) — khác nhau ở ADC, Package, Operating Temperature, Communication Interfaces, PWM Channels.
PIC18LF46K42-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K42T-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F46K42-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K42-I/MV
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF46K42-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K42-I/ML Tỷ lệ tối đa & tính chất điện
| Core Processor | PIC18 |
| Core Size | 8-bit |
| Tần số xung maksimum | 64 MHz |
| Instruction Throughput | 16 MIPS |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data RAM | 4 KB |
| Data EEPROM | 1 KB (1024 bytes) |
| Operating Voltage (VDD) | 1.8 V to 3.6 V (LF variant) |
| I/O Pins | 36 |
| ADC | 12-bit ADC2, up to 35 external channels |
| DAC | 5-bit DAC |
| Comparators | Yes |
| PWM Modules | Yes (multiple) |
| DMA Channels | 2 |
| Communication Interfaces | 2x I2C, 2x SPI, 2x UART/USART |
| Timers | Multiple (see datasheet) |
| Hộp | 44-pin QFN (8x8 mm) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (Industrial, I grade) |
| Process Technology | CMOS |
| Low-Power Feature | eXLP (XLP) ultra-low-power, Sleep mode operation |
| Touch Sensing | Hardware CVD (Capacitive Voltage Divider) |
| Trạng thái RoHS | Compliant |
Hướng dẫn cấu hình chân PIC18LF46K42-I/ML 44-pin qfn (8x8 mm)
Cấu hình chân cho PIC18LF46K42-I/ML (44-pin qfn (8x8 mm) gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho PIC18LF46K42-I/ML.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
PIC18LF46K42-I/ML phù hợp cho 7 Áp dụngs: IoT Sensor Node with Low-Power Wireless, Capacitive Touch User Interface, Low-Power Motor Control (BLDC / Stepper), USB HID Peripheral / Consumer Device, Battery-Powered Medical Wearable, Home Automation / Smart Home Controller, Industrial Sensor Conditioning Front-End.
IoT Sensor Node with Low-Power Wireless
The PIC18LF46K42-I/ML fits IoT sensor nodes because its 1.8V-3.6V operating range and eXLP ultra-low-power Sleep currents enable multi-year coin-cell operation. The 12-bit ADC2 with up to 35 channels handles multiple analog sensors (temperature, humidity, light, gas) directly, while hardware CVD supports touch wake-on-touch buttons. Paired with a sub-GHz or BLE radio, the MCU handles protocol framing in hardware and sleeps between transmissions.
Được đề xuất
Capacitive Touch User Interface
The PIC18LF46K42-I/ML excels in capacitive touch panels thanks to its integrated Hardware Capacitive Voltage Divider (CVD). The 12-bit ADC2 supports up to 35 touch channels, enabling key matrices, sliders, and proximity sensing. eXLP technology permits touch scanning in Sleep mode, drawing sub-uA current between user interactions. Microchip's mTouch library provides pre-validated firmware routines, reducing time-to-market.
Được đề xuất
Low-Power Motor Control (BLDC / Stepper)
The PIC18LF46K42-I/ML's multiple PWM modules, comparators, and 5-bit DAC enable cost-effective BLDC and stepper motor control in battery-powered tools. Vector interrupts ensure deterministic response to back-EMF zero-cross events. The 64 MHz CPU provides 16 MIPS for field-oriented control (FOC) software loops on smaller motors. The 1.8V minimum supports single-cell Li-Ion direct drive.
Được đề xuất
USB HID Peripheral / Consumer Device
The PIC18LF46K42-I/ML drives USB Human Interface Devices when paired with an external USB transceiver and 3.3V regulator. Its 64 KB Flash accommodates USB stacks, HID report descriptors, and composite device firmware. Core-independent peripherals (CIPs) handle USB signaling without CPU intervention, freeing the core for application logic. Common uses: keyboards, mice, game controllers, custom HID input panels.
Được đề xuất
Battery-Powered Medical Wearable
The PIC18LF46K42-I/ML is suitable for battery-powered medical wearables including glucose monitors, pulse oximeters, and ambulatory ECG patches. eXLP Sleep currents as low as sub-uA extend battery life, while the 12-bit ADC2 captures biopotential signals. Industrial temperature grade (-40C to +85C) handles sterilization and body-temperature ranges. CIPs enable signal processing without waking the CPU.
Được đề xuất
Home Automation / Smart Home Controller
The PIC18LF46K42-I/ML fits smart home hubs and edge nodes because of its dual I2C/SPI/UART, 36 I/O, and on-board CIPs. Multi-protocol bridging (e.g., Zigbee to Wi-Fi to BLE) is feasible via the 64 KB Flash and 4 KB RAM. ADC2 channels read occupancy sensors, light levels, and battery voltages while the MCU manages relay switching through PWM. Industrial temperature range covers attic/garage deployments.
Được đề xuất
Industrial Sensor Conditioning Front-End
The PIC18LF46K42-I/ML serves as a multi-channel sensor conditioning front-end in industrial 4-20 mA loops, RTD/thermocouple readers, and process transmitters. The 12-bit ADC2's hardware oversampling and averaging produce effective resolution above 14 bits, while the integrated 5-bit DAC and comparators close feedback loops. DMA channels stream conversion results without CPU overhead, enabling sub-ms loop times.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF46K42-I/ML — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18LF46K42-E/ML | PIC18LF46K42T-I/ML | PIC18F46K42-I/ML | PIC18LF46K42-I/MV | PIC18LF46K42-I/P |
|---|---|---|---|---|---|---|
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 40-UQFN (5x5 mm) - smaller | 40-PDIP - through-hole |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Size | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 |
| Max Clock Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 1.8V to 3.6V (LF) | 1.8V to 3.6V (LF) | 1.8V to 3.6V (LF) | 2.3V to 5.5V (F) | 1.8V to 3.6V (LF) | 1.8V to 3.6V (LF) |
| Program Memory | 64 KB Flash | 64 KB Flash | 64 KB Flash | 64 KB Flash | 64 KB Flash | 64 KB Flash |
| Temperature Grade | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
| I/O Pins | 36 | 36 | 36 | 36 | 36 | 36 |
Bảo phân biệt quan trọng
- Industrial temperature range with low-voltage operation (vsPIC18F46K42-I/ML)
- Hardware CVD for capacitive touch without external ICs (vsPIC18LF46K40-I/ML)
- DMA channels and vector interrupts for deterministic response (vsPIC18F46K22-I/ML)
Ghi chú thiết kế
Estimated: Power dissipation for the PIC18LF46K42-I/ML in active mode at 64 MHz is approximately 12 mW (3.3V x 3.6 mA typical, datasheet figure). In Sleep mode with RTC running, current drops to single-digit uA. Use a 0.1 uF ceramic bypass capacitor within 2 mm of each VDD pin plus a 10 uF bulk capacitor on the VDD rail. The 44-QFN exposed thermal pad must be soldered to a copper pour (minimum 1 sq inch) for thermal and electrical ground integrity.
Route ICSPCLK/ICSPDAT signals for in-circuit serial programming access to a 6-pin header matching Microchip's ICSP specification. Keep the MCLR pin pulled up to VDD through a 10 kOhm resistor with a 100 nF capacitor to ground for decoupling. The 44-QFN land pattern must follow IPC-7351 nominal or manufacturer-specific recommendations; ensure the thermal pad vias use 0.3 mm drill / 0.5 mm pad with a 1.2 mm pitch grid.
Do not exceed 3.6V on the LF variant - exceeding this damages the part. Confirm the F variant (PIC18F46K42) is selected for 5V systems. Do not leave unused I/O pins floating; configure them as outputs or inputs with internal weak pull-ups. For capacitive touch, follow the mTouch hardware guide - guard traces must surround touch electrodes with a ground trace to prevent crosstalk. The ADC2 reference voltage must be within VDD-0.3V for accurate conversions.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; for automotive applications choose PIC18F46K42-E/ML or PIC18LF46K42-E/ML (extended temperature grade). Lead-free / halogen-free confirmed by Microchip environmental compliance documentation.