PIC18LF46K42-I/ML - 64KB Flash 8-Bit MCU, 64MHz, 44-QFN | Microchip
料号： PIC18LF46K42-I/ML ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.74 | $274.00 |
| 500 | $2.41 | $1,205.00 |
| 1,000 | $2.08 | $2,080.00 |
| 2,500 | $1.83 | $4,575.00 |
PIC18LF46K42-I/ML 概述
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.
直接替换替代料： PIC18LF46K42-I/ML ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18LF46K42-I/ML （相同外形与封装尺寸） ——差异在于 ADC, Package, Operating Temperature, Communication Interfaces, PWM Channels.
快速对比工具——选择替代料号进行并排对比：
PIC18LF46K42-E/ML
✅ 直接替换✓ 有现货
$1.96 / 个
查看数据手册 →PIC18LF46K42T-I/ML
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F46K42-I/ML
✅ 直接替换✓ 有现货
$1.97 / 个
查看数据手册 →PIC18LF46K42-I/MV
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC18LF46K42-I/P
✅ 直接替换✓ 有现货
$2.31 / 个
查看数据手册 →PIC18LF46K42-I/ML 最大额定值与电气特性
| Core Processor | PIC18 |
| Core Size | 8-bit |
| 最大时钟频率 | 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) |
| 封装 | 44-pin QFN (8x8 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -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) |
| RoHS 状态 | Compliant |
PIC18LF46K42-I/ML 44-pin qfn (8x8 mm) 引脚配置指南
PIC18LF46K42-I/ML（44-pin qfn (8x8 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： PIC18LF46K42-I/ML.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PIC18LF46K42-I/ML 适用于 7 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： PIC18LF46K42-I/ML ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Industrial temperature range with low-voltage operation （对比 PIC18F46K42-I/ML)
- Hardware CVD for capacitive touch without external ICs （对比 PIC18LF46K40-I/ML)
- DMA channels and vector interrupts for deterministic response （对比 PIC18F46K22-I/ML)
设计说明
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.
合规信息
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.