PIC18LF46K22T-I/MV - 8-Bit 64MHz 64KB Flash MCU | Microchip
MPN： PIC18LF46K22T-I/MV ✓ 啟用中PIC18LF46K22T-I/MV 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and I/O peripherals. The PIC18 K-series belongs to Microchip's nanoWatt XLP product line, an umbrella of ultra-low-power 8-bit MCUs that extend battery life through deep sleep modes drawing under 50 nA. Within the broader taxonomy, the PIC18LF46K22 sits as follows: microcontroller -> embedded controller -> 8-bit MCU -> PIC18 family -> nanoWatt XLP -> PIC18 K-series.
Key features include 64 MHz maximum clock speed with 16 MIPS throughput, 35 digital I/O lines, 28-channel 10-bit ADC, 5 CCP/ECCP modules, 2 USART, 2 SPI, 2 I2C, and CTMU for capacitive touch. The 40-UQFN package with exposed thermal pad keeps board footprint compact at 5x5 mm while providing 35 usable I/O through peripheral pin select flexibility. Memory protection, code protection, and a unique device ID support secure firmware deployment.
Typical applications include battery-powered IoT sensor nodes, e-metering, energy harvesting devices, wearable health monitors, and portable medical instruments where the LF voltage range and nanoWatt XLP sleep modes are decisive. The 64 KB Flash / 3968 B RAM split is well matched to mid-complexity control loops with small TCP/IP or BLE stacks on RTOS or cooperative schedulers.
Design consideration: the exposed pad of the UQFN-40 must be soldered to a grounded copper pour for thermal dissipation and for mechanical reliability; omitting this degrades I/O count and reliability. Always verify the specific voltage range - LF (1.8-3.6V) versus F (2.3-5.5V) - when migrating between the F and LF variants of the same die.
This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for sourcing and replacement decisions on the PIC18LF46K22 family.
直接替換替代品，適用於 PIC18LF46K22T-I/MV — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18LF46K22T-I/MV （相同外形與佔位） — 差異在於 Package, ADC, Core Architecture, Data EEPROM, Comparators.
PIC18LF46K22-I/MV
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18LF46K22-E/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC18F46K22-I/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF46K22-I/ML
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC18LF45K22T-I/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF46K22T-I/MV 最大額定值與電氣特性
| Core Architecture | PIC18 (8-bit RISC) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| RAM | 3968 bytes |
| Data EEPROM | 1024 bytes |
| Maximum CPU Clock | 64 MHz (16 MIPS) |
| Operating Voltage Range | 1.8 V to 3.6 V (LF variant) |
| Number of I/O Pins | 35 |
| ADC | 10-bit, up to 28 channels |
| 封裝 | 40-pin UQFN (5x5 mm) with exposed pad |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (Industrial) |
| Low-Power Technology | nanoWatt XLP |
| CCP / ECCP Modules | 5 (2 CCP + 3 ECCP) |
| Communication Peripherals | 2x USART, 2x SPI, 2x I2C |
| CTMU (Capacitive Touch) | Yes |
| RoHS 狀態 | Compliant |
| MSL 等級 | 3 (168 hours) |
PIC18LF46K22T-I/MV 40-pin uqfn (5x5 mm) with exposed pad 腳位配置指南
PIC18LF46K22T-I/MV（40-pin uqfn (5x5 mm) with exposed pad 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： PIC18LF46K22T-I/MV.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC18LF46K22T-I/MV 適用於 6 應用s: Battery-Powered IoT Sensor Nodes, Portable Medical and Health Monitors, Smart Energy Metering and Sub-Metering, Industrial Control and Automation, Consumer Appliances and HMI Panels, Automotive Body Electronics (Non-Safety).
Battery-Powered IoT Sensor Nodes
The PIC18LF46K22T-I/MV is well suited to battery-powered IoT sensor nodes because it operates down to 1.8V on a single lithium cell and draws less than 100 nA in deep sleep through Microchip's nanoWatt XLP technology. With 64 KB Flash it can host a small RTOS, a wireless protocol stack fragment, and sensor fusion code without external memory, while the 28-channel 10-bit ADC interfaces directly with analog environmental sensors like temperature, humidity, and gas sensors. The 40-UQFN footprint keeps the node small enough to fit inside standard sensor housings.
推薦
Portable Medical and Health Monitors
Portable medical devices such as glucose meters, pulse oximeters, and wearable health patches benefit from the PIC18LF46K22T-I/MV's wide 1.8V-3.6V supply range, which supports direct operation from a single CR2032 coin cell or single-cell Li-ion battery. The integrated CTMU module enables capacitive touch buttons on the device housing without extra components, and the 35 I/O pins can drive LCD displays, LEDs, and a Bluetooth Low Energy companion module. Compliance with the medical safety standards requires low-leakage firmware, and the device's deep sleep current below 100 nA extends battery life beyond 12 months in typical use cycles.
推薦
Smart Energy Metering and Sub-Metering
Energy meters and sub-metering devices need reliable low-power operation, accurate analog measurement, and tamper-resistant firmware storage, all of which the PIC18LF46K22T-I/MV provides. The 64 KB Flash comfortably fits IEC 62053 metering algorithm code and calibration tables, while the 10-bit ADC with 28 channels measures voltage and current simultaneously through current transformers or shunt resistors. The 5 CCP/ECCP modules generate PWM outputs for calibration signaling and power-line communication. The nanoWalt XLP sleep modes extend battery life in power-outage backup modes to multi-year operation.
推薦
Industrial Control and Automation
Industrial sensor hubs, building automation controllers, and small PLCs benefit from the PIC18LF46K22T-I/MV's 35 I/O lines, dual USART channels for Modbus RTU/ASCII, and dual I2C/SPI interfaces for sensor expansion. The -40C to +85C industrial temperature rating covers outdoor and factory environments, while the 64 MHz clock supports deterministic control loops at sub-millisecond sample rates. The 40-UQFN package's exposed pad enables PCB ground plane connection, improving EMI performance in noisy industrial settings where the device must coexist with motor drives and switching contactors.
推薦
Consumer Appliances and HMI Panels
Consumer appliances such as coffee machines, washing machines, and HMI panels use the PIC18LF46K22T-I/MV for control and user interface management. The CTMU module supports capacitive touch buttons on glass front panels, while the 35 I/O pins drive LCDs, segment displays, relays, and triac interfaces. The 1.8V-3.6V supply range simplifies integration with both 3.3V regulated rails and direct battery backup. Five CCP/ECCP modules can generate the precise PWM outputs required for motor speed control, heating element modulation, and LED dimming in modern appliances.
推薦
Automotive Body Electronics (Non-Safety)
Although not AEC-Q100 qualified, the PIC18LF46K22T-I/MV is widely used in non-safety automotive body electronics such as interior lighting, seat controllers, mirror adjusters, and accessory modules where -40C to +85C industrial grade suffices. The device's nanoWatt XLP sleep modes support CAN-bus wake-up scenarios with sub-100 nA quiescent current, while the 64 MHz clock handles LIN-bus slave stacks and basic lighting algorithms. For AEC-Q100 qualified automotive designs, Microchip offers the PIC18F46K22-E/PTVAO and related -VAO variants, but the LF46K22 remains a low-cost option for non-safety applications.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18LF46K22T-I/MV — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18LF46K22-I/MV | PIC18LF46K22-E/MV | PIC18F46K22-I/MV | PIC18LF45K22T-I/MV |
|---|---|---|---|---|---|
| Package | 40-UQFN (5x5 mm) exposed pad | 40-UQFN (5x5 mm) - same | 40-UQFN (5x5 mm) - same | 40-UQFN (5x5 mm) - same | 40-UQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage Range | 1.8V to 3.6V (LF) | 1.8V to 3.6V (LF) - same | 1.8V to 3.6V (LF) - same | 2.3V to 5.5V (F) | 1.8V to 3.6V (LF) - same |
| Flash Memory | 64 KB | 64 KB - same | 64 KB - same | 64 KB - same | 32 KB |
| RAM | 3968 bytes | 3968 bytes - same | 3968 bytes - same | 3968 bytes - same | 3968 bytes - same |
| Maximum Clock Speed | 64 MHz (16 MIPS) | 64 MHz - same | 64 MHz - same | 64 MHz - same | 64 MHz - same |
| I/O Pins | 35 | 35 - same | 35 - same | 35 - same | 35 - same |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C - same | -40C to +125C (Extended) | -40C to +85C - same | -40C to +85C - same |
| nanoWatt XLP Sleep Current | <100 nA | <100 nA - same | <100 nA - same | <100 nA - same | <100 nA - same |
主要差異化特點
- Wide 1.8V-3.6V operating range enables direct single-cell battery operation (對比PIC18F46K22T-I/MV)
- Industrial temperature grade -40C to +85C standard (對比PIC18LF46K22-E/MV)
- Larger 64 KB Flash for protocol stack headroom (對比PIC18LF45K22T-I/MV)
- True drop-in compatibility with PIC18F46K22 in same package (對比PIC18LF26K22T-I/SO)
設計說明
The exposed thermal pad (EP) on pin 41 of the UQFN-40 package must be soldered to a grounded copper pour that is at least 1 square inch for reliable thermal and electrical performance. Estimated: based on 0.5W typical active dissipation at 64 MHz and 3.3V, theta_JA of approximately 35 C/W gives a 17C rise above ambient. Without EP soldering, mechanical reliability suffers and EMI immunity drops noticeably due to the missing ground reference. Use at least 4 thermal vias in the EP copper to conduct heat to internal ground planes.
Decouple VDD with a 100 nF ceramic capacitor placed within 3 mm of the VDD pin and a bulk 10 uF tantalum or ceramic capacitor on the main supply rail. The PIC18LF46K22T-I/MV has multiple VDD/VSS pairs internally; ensure each pair has its own 100 nF decoupling cap. According to Microchip's PIC18 K-series design guidelines, poor decoupling is the most common cause of RF emissions failing CE/FCC testing on otherwise functional designs.
Do not confuse the LF and F variants during PCB population - PIC18LF46K22T-I/MV operates from 1.8V to 3.6V while PIC18F46K22T-I/MV requires 2.3V to 5.5V. The F variant will not start at voltages below 2.3V, while the LF variant is the correct choice for single-cell Li-ion or 3.3V regulated designs. Also verify that the ICSP programming connector (PGD/PGC pins) is accessible after PCB assembly, as some surface-mount designs accidentally route traces that block header access.
When using the 64 MHz internal oscillator for USB or high-speed serial peripherals, the PIC18LF46K22T-I/MV requires careful PCB layout to avoid jitter. Estimated: keep the high-speed clock traces (OSC1/OSC2 if external crystal is used) shorter than 10 mm, route them over a continuous ground plane, and guard them with ground traces. For UART baud rates above 115200, consider using the FRC with PLL configuration locked to a precision reference rather than the untrimmed internal oscillator.
合規資訊
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose VAO-suffix variants for automotive safety applications. Halogen-free mold compound confirmed in Microchip environmental compliance documentation.
