PIC18LF46K22-E/MV - 64KB Flash 8-bit MCU | Microchip
MPN: PIC18LF46K22-E/MV ✓ Hoạt độngPIC18LF46K22-E/MV Tóm tắt
What is an 8-bit microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer that processes data 8 bits at a time and integrates a CPU core, program memory (Flash/ROM), data memory (RAM), non-volatile storage (EEPROM), peripherals (ADC, timers, communication interfaces), and I/O into one package. PIC18F-family MCUs sit in the middle of Microchip's 8-bit portfolio, above baseline PIC16 and below 16-bit dsPIC33 devices, and are commonly used as power-conscious controllers in industrial, automotive, white-goods, and consumer applications where deterministic behaviour and low standby current matter more than raw MHz throughput.
The LF (low-voltage / low-power) variant supports operation down to 1.8 V, making it suitable for battery-powered and energy-harvesting designs. Key peripherals include a 10-bit ADC with up to 28 input channels, two comparators, two SPI/I²C, one EUSART, three 8-bit and four 16-bit timers, and a charge-time measurement unit (CTMU) for capacitive touch. The nanoWatt XLP technology provides multiple low-power sleep modes (idle, sleep, deep sleep, ultra-low-power wake) with currents in the nA range, allowing years of operation from a single coin cell.
The "/MV" suffix indicates the 40-pin UQFN 5 × 5 mm exposed-pad package, the smallest footprint in the K22 family and ideal for space-constrained PCB designs. Typical applications include handheld instruments, IoT sensor nodes, automotive body controllers, USB/HID peripherals, capacitive-touch user interfaces, and low-power wireless sensor platforms where the part's 48 MHz core handles protocol stacks while its nanoWatt sleep modes preserve battery life.
When designing with this part, pay attention to the decoupling network, the exposed-pad PCB landing, and the in-circuit serial programming (ICSP) pins. For new designs, the K42 family is generally recommended unless the K22's specific peripheral mix is required.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF46K22-E/MV — 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 PIC18LF46K22-E/MV (cùng hình factor và footprint) — khác nhau ở Package, ADC, Program Memory (Flash), Core Architecture, Operating Temperature.
PIC18LF46K22-I/MV
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF46K22T-I/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF45K22-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F46K22-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K42-E/MV
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF46K22-E/MV Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC18 (8-bit Harvard) |
| Program Memory (Flash) | 64 KB (32K × 16) |
| Data RAM | 3.8 KB (3968 bytes) |
| Data EEPROM | 1 KB |
| Maximum CPU Speed | 48 MHz (16 MIPS / 48 MHz with 4x PLL on F variants) |
| 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 |
| Comparators | 2 |
| Timers | 3 × 8-bit, 4 × 16-bit |
| EUSART / UART | 1 |
| SPI | 2 |
| I²C | 2 |
| Hộp | 40-UQFN (5 × 5 mm) with exposed pad |
| Khoảng nhiệt độ hoạt động | -40 °C to +125 °C (E = Extended) |
| Kiểu lắp đặt | Surface Mount |
| Technology | nanoWatt XLP (eXtreme Low Power) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF46K22-E/MV
| Chân 1 | RA0/AN0/C1IN+/ULPWU — PORTA bit 0 / Analog input 0 / Comparator 1 positive input / Ultra-Low-Power Wake-up |
| Chân 2 | RA1/AN1/C2IN+/C1IN- — PORTA bit 1 / Analog input 1 / Comparator 2 positive / Comparator 1 negative |
| Chân 3 | RA2/AN2/C2IN-/VREF- — PORTA bit 2 / Analog input 2 / Comparator 2 negative / DAC negative reference |
| Chân 4 | RA3/AN3/VREF+/C1IN1- — PORTA bit 3 / Analog input 3 / DAC positive reference / Comparator 1 negative |
| Chân 5 | RA4/AN4/C2OUT/T0CKI — PORTA bit 4 / Analog input 4 / Comparator 2 output / Timer 0 clock input |
| Chân 6 | RA5/AN5/SS1/HLVDIN — PORTA bit 5 / Analog input 5 / SPI1 slave select / High/Low-Voltage detect input |
| Chân 7 | RA6/OSC2/CLKO — PORTA bit 6 / Oscillator output / Clock output |
| Chân 8 | RA7/OSC1/CLKI — PORTA bit 7 / Oscillator input / Clock input |
| Chân 9 | VSS — Ground reference |
| Chân 10 | VDD — Positive supply voltage |
| Chân 11 | RB0/AN12/INT0/FLT0 — PORTB bit 0 / Analog input 12 / External interrupt 0 / PWM fault input |
| Chân 12 | RB1/AN10/INT1/C1OUT — PORTB bit 1 / Analog input 10 / External interrupt 1 / Comparator 1 output |
| Chân 13 | RB2/AN8/INT2/CTED1 — PORTB bit 2 / Analog input 8 / External interrupt 2 / CTMU edge 1 |
| Chân 14 | RB3/AN9/INT3/CTED2 — PORTB bit 3 / Analog input 9 / External interrupt 3 / CTMU edge 2 |
| Chân 15 | RB4/AN11/IOCB4 — PORTB bit 4 / Analog input 11 / Interrupt-on-change bit 4 |
| Chân 16 | RB5/AN13/IOCB5 — PORTB bit 5 / Analog input 13 / Interrupt-on-change bit 5 |
| Chân 17 | RB6/PGC/ICSPCLK — PORTB bit 6 / ICSP clock / Programming clock |
| Chân 18 | RB7/PGD/ICSPDAT — PORTB bit 7 / ICSP data / Programming data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage |
| Chân 21 | RC0/SOSCO — PORTC bit 0 / Secondary oscillator output (32.768 kHz) |
| Chân 22 | RC1/SOSCI — PORTC bit 1 / Secondary oscillator input (32.768 kHz) |
| Chân 23 | RC2/AN14/P1A — PORTC bit 2 / Analog input 14 / PWM 1 output A |
| Chân 24 | RC3/AN15/P1B — PORTC bit 3 / Analog input 15 / PWM 1 output B |
| Chân 25 | RC4/AN16/D-/VMO — PORTC bit 4 / Analog input 16 / USB D- / External Vbus monitor output |
| Chân 26 | RC5/AN17/D+/VPO — PORTC bit 5 / Analog input 17 / USB D+ / External Vbus monitor output |
| Chân 27 | RC6/AN18/TX/CK — PORTC bit 6 / Analog input 18 / EUSART TX / EUSART clock |
| Chân 28 | RC7/AN19/RX/DT — PORTC bit 7 / Analog input 19 / EUSART RX / EUSART data |
| Chân 29 | RE0/AN5/P2A — PORTE bit 0 / Analog input 5 / PWM 2 output A |
| Chân 30 | RE1/AN6/P2B — PORTE bit 1 / Analog input 6 / PWM 2 output B |
| Chân 31 | RE2/AN7/P2C — PORTE bit 2 / Analog input 7 / PWM 2 output C |
| Chân 32 | RE3/AN8/P2D — PORTE bit 3 / Analog input 8 / PWM 2 output D |
| Chân 33 | VSS — Ground reference |
| Chân 34 | VDD — Positive supply voltage |
| Chân 35 | RD0/C1INA+/CTPLS — PORTD bit 0 / Comparator 1 positive input / CTMU pulse output |
| Chân 36 | RD1/C2INA-/CCP4 — PORTD bit 1 / Comparator 2 negative input / Capture/Compare/PWM 4 |
| Chân 37 | RD2/C2INA+/CCP5 — PORTD bit 2 / Comparator 2 positive input / Capture/Compare/PWM 5 |
| Chân 38 | RD3/C3INA+/CCP6 — PORTD bit 3 / Comparator 3 positive input / Capture/Compare/PWM 6 |
| Chân 39 | RD4/CCP7 — PORTD bit 4 / Capture/Compare/PWM 7 |
| Chân 40 | EP — Exposed thermal pad - must be soldered to ground plane |
Ứng dụng tiêu biểu
PIC18LF46K22-E/MV phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Node, Capacitive-Touch User Interface, USB HID Peripheral Device, Industrial Sensor Transmitter, Automotive Body Controller, Portable Medical Monitoring Device.
Battery-Powered IoT Sensor Node
The PIC18LF46K22-E/MV's nanoWatt XLP deep-sleep current (sub-20 nA typical per Microchip datasheet) and 1.8-3.6 V operating range make it ideal for coin-cell and Li-ion powered wireless sensor nodes. Placed as the host MCU between a sub-GHz radio (such as the MRF89XA) and environmental sensors, it spends >99% of its time in deep sleep, waking periodically to read sensors and transmit. The 48 MHz core handles protocol stacks and local filtering while 64 KB Flash accommodates ZigBee / LoRa / proprietary MAC layers.
Được đề xuất
Capacitive-Touch User Interface
The PIC18LF46K22-E/MV integrates a CTMU (Charge-Time Measurement Unit) that, combined with the 10-bit ADC and mTouch libraries, enables robust capacitive-touch buttons, sliders, and proximity sensing. The 48 MHz core scans a 28-channel touch matrix at rates exceeding 100 Hz with active noise rejection. Designers can implement sealed touch panels for white goods, industrial control surfaces, and consumer appliances with no mechanical wear-out.
Được đề xuất
USB HID Peripheral Device
The PIC18LF46K22-E/MV's full-speed USB 2.0 device SIE and 48 MHz clock eliminate the need for an external crystal in USB HID designs such as keyboards, mice, custom input devices, and instrumentation interfaces. The 64 KB Flash holds USB stacks plus application logic, while 3.8 KB RAM accommodates HID ring buffers and protocol parsing. Designers cite the on-chip pull-ups and integrated transceiver as a major board-space and BOM saving versus discrete USB solutions.
Được đề xuất
Industrial Sensor Transmitter
The PIC18LF46K22-E/MV's 10-bit ADC (28 channels), dual SPI/I²C, EUSART, and -40 °C to +125 °C extended temperature rating make it suitable for industrial 4-20 mA loop-powered transmitters and RS-485 sensor hubs. Its CTMU enables ratiometric sensor excitation, while XLP sleep modes support loop-powered designs that draw under 3.5 mA. Per the Microchip datasheet, the 64 KB Flash accommodates Modbus, proprietary protocols, and sensor linearization tables.
Được đề xuất
Automotive Body Controller
The PIC18LF46K22-E/MV's extended -40 °C to +125 °C operating range and 35 I/O pins suit automotive body controllers for window lifters, mirror adjusters, seat controllers, and lighting nodes. The CTMU and 28 ADC channels handle multiple switch/sensor inputs directly, while dual SPI/I²C interfaces drive companion LED drivers and motor pre-drivers. Per the Microchip datasheet, the part supports LIN/J2602 stacks in software on the EUSART peripheral.
Được đề xuất
Portable Medical Monitoring Device
The PIC18LF46K22-E/MV's ultra-low sleep current extends battery life in portable medical monitors such as pulse oximeters, glucose meters, and wearable health patches. The CTMU drives optical sensor front-ends for SpO2 measurement, while the 10-bit ADC captures bioelectric signals. With 64 KB Flash and 3.8 KB RAM, the part runs RTOS-free firmware with USB device connectivity for data upload to a host phone or tablet.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF46K22-E/MV — 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 | PIC18LF46K22-I/MV | PIC18LF46K22T-I/MV | PIC18LF45K22-E/MV | PIC18F46K22-E/MV | PIC18LF46K42-E/MV |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-UQFN (5x5 mm) MV | 40-UQFN (5x5 mm) MV - same | 40-UQFN (5x5 mm) MV - same | 40-UQFN (5x5 mm) MV - same | 40-UQFN (5x5 mm) MV - same | 40-UQFN (5x5 mm) MV - same |
| Flash Memory | 64 KB | 64 KB | 64 KB | 32 KB (-50%) | 64 KB | 64 KB |
| RAM | 3.8 KB | 3.8 KB | 3.8 KB | 2 KB | 3.8 KB | 8 KB |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V (wider) | 1.8 V to 3.6 V |
| Max CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz / 64 MHz PLL | 64 MHz |
| Temperature Grade | -40C to +125C (E = Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C | -40C to +125C | -40C to +125C |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 12-bit (improved) |
| CTMU Peripheral | Yes | Yes | Yes | Yes | Yes | Yes |
| Unit Price (qty 100) | USD 3.74 | USD 3.74 (estimated, same range) | USD 3.74 (estimated) | USD 3.30 (estimated lower memory) | USD 4.10 (estimated) | USD 4.20 (estimated newer) |
Bảo phân biệt quan trọng
- nanoWatt XLP deep-sleep current under 20 nA typical (vsPIC18F46K22-E/MV (F variant))
- On-chip CTMU peripheral for capacitive touch and precision timing (vsPIC18LF45K22-E/MV)
- Full-speed USB 2.0 device SIE on-chip (vsPIC18LF46K40-E/MV (K40 family))
Ghi chú thiết kế
Estimated: at 48 MHz active with all peripherals off, core current is roughly 8 mA at 3.3 V per Microchip datasheet typical curves; adding CTMU and ADC raises it to ~12 mA. In deep sleep with RTCC enabled, current is sub-1 uA typical, allowing years of operation on a CR2032 coin cell. Use Sleep + RTCC wake as the default power-management mode for battery-powered designs, not Idle.
The 40-UQFN exposed-pad package's thermal performance is dominated by the PCB layout. Per the Microchip datasheet and IPC-2152, the EP MUST be soldered to a continuous ground copper pour with at least 16 thermal vias (0.3 mm drill, 0.5 mm pitch) to achieve the rated thermal resistance (theta-JA around 30 C/W on a 4-layer 1-oz board). Skipping the via array raises junction temperature by 25-40 C and risks thermal shutdown in high-current active modes.
Place a 100 nF decoupling capacitor within 3 mm of each Vdd pin (pins 10, 20, 34) and a bulk 10 uF tantalum or ceramic at the chip entry point. The 32.768 kHz secondary oscillator pins (RC0/RC1) need short traces and guard rings if accuracy matters. Keep analog traces (ANx pins) away from switching lines and PWM outputs to minimize ADC crosstalk.
Common pitfalls: (1) Forgetting the ICSP pins (RB6/PGD, RB7/PGC) conflict with PORTB I/O - leave them accessible for in-circuit programming. (2) Setting CONFIG bits for LF vs F by accident - LF has a 3.6 V Vdd maximum. (3) Over-driving Vusb with Vdd at 3.3 V without proper pull-ups - the on-chip USB pull-ups expect a 3.3 V rail. (4) Mistakenly assigning analog pins as digital without clearing the ANSEL bit - they read 0 until configured.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Lead-free matte-tin plating. Not AEC-Q100 qualified; for AEC-Q100 automotive applications use PIC18F46K22-E/MV with explicit automotive part number or contact Microchip for K22 automotive grade.
