PIC18LF24K22T-I/MV - 16KB Flash 8-bit MCU, 28-UQFN | Microchip
MPN： PIC18LF24K22T-I/MV ✓ 啟用中PIC18LF24K22T-I/MV 概覽
What is a PIC18 LF microcontroller? It is a member of Microchip's 8-bit PIC18 family targeting low-voltage (1.8V-3.6V) operation with the proprietary nanoWatt XLP technology, which provides sleep currents as low as tens of nanoamperates and multiple power-saving modes. Within the broader taxonomy, PIC18 belongs to the 8-bit microcontroller category -> MCU -> embedded microcontroller -> semiconductor IC, sitting alongside PIC16 (mid-range) and PIC24/dsPIC (16-bit) families in Microchip's portfolio.
Key features of the PIC18LF24K22T-I/MV include 16 KB self-programmable Flash with 10K erase/write cycles endurance, 768 bytes of RAM, 256 bytes of EEPROM, an integrated 12-bit ADC with up to 17 channels, multiple capture/compare/PWM modules, two Enhanced USART modules, two MSSP (SPI/I2C) peripherals, and a 32 kHz internal oscillator. The device supports CTMU (Charge Time Measurement Unit) for capacitive touch sensing, mTouch capability, and up to 25 mA source/sink current on I/O pins.
From an architectural standpoint, the PIC18F K-series uses a 16-bit instruction word and a Harvard bus architecture with separate program and data paths, enabling deterministic single-cycle execution. The "LF" variant specifies an operating voltage range of 1.8V-3.6V, distinguishing it from the standard "F" variant which supports up to 5.5V. The 28-UQFN package with an exposed die pad provides a 4x4 mm footprint suited for space-constrained hand-held modules.
Typical applications for the PIC18LF24K22T-I/MV include low-power remote sensor nodes, wearable fitness/health monitors, IoT edge nodes, industrial sensor interface modules, USB/serial bridge firmware using the Enhanced USART, consumer handheld devices, and small appliances requiring capacitive touch controls. Designers select this part when an 8-bit MCU is sufficient for the workload and minimal sleep current is the dominant requirement.
Design consideration: ensure the ICSP/ICD pins (PGC/PGD) are reserved for in-circuit serial programming and debugging access; an isolation resistor or jumper is recommended on PGC/PGD lines if the application shares those pins with user circuitry. The exposed thermal pad on the UQFN-28 must be soldered to the board ground plane for mechanical integrity and thermal performance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers and procurement teams a single, actionable reference.
直接替換替代品，適用於 PIC18LF24K22T-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： PIC18LF24K22T-I/MV （相同外形與佔位） — 差異在於 Package, Operating Temperature, Program Memory (Flash), Core Architecture, ADC.
PIC18LF24K22-I/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF24K22T-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF23K22T-I/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF23K22-I/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC18F24K22T-I/MV
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF23K22T-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF24K22T-I/MV 最大額定值與電氣特性
| Core Architecture | PIC18 (8-bit RISC, Harvard) |
| Core Size | 8-bit |
| Maximum CPU Speed | 64 MHz |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data RAM | 768 bytes |
| Data EEPROM | 256 bytes |
| Operating Voltage Range | 1.8 V to 3.6 V |
| ADC | 12-bit, up to 17 channels |
| Comparators | 2 (peripheral) |
| EUSART | 2 |
| MSSP (SPI/I2C) | 2 |
| Internal Oscillator | 32 kHz + 16 MHz HF (per datasheet family) |
| nanoWatt XLP Technology | Yes |
| CTMU / mTouch | Yes |
| 封裝 | 28-UQFN (4x4 mm) with exposed pad |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (Industrial, "I") |
| Lead-Free / RoHS | Compliant (lead-free per Microchip product page) |
| Programming/Debug | ICSP, ICD via PGC/PGD |
PIC18LF24K22T-I/MV 腳位配置
| 腳位 1 | RA7/OSC1/CLKI — I/O port / external clock input |
| 腳位 2 | RA6/OSC2/CLKO — I/O port / oscillator output |
| 腳位 3 | RA5/AN4/C2IN+/HLVDIN — I/O / ADC channel / comparator input |
| 腳位 4 | RA4/AN3/C2OUT — I/O / ADC channel / comparator output |
| 腳位 5 | RA3/AN2/VREF+/C1IN+ — I/O / ADC channel / voltage reference |
| 腳位 6 | RA2/AN1/C2IN- — I/O / ADC channel / comparator input |
| 腳位 7 | RA1/AN1/C1IN-/AN8 — I/O / ADC channel |
| 腳位 8 | RA0/AN0/C1IN+/AN10 — I/O / ADC channel |
| 腳位 9 | VSS — Ground reference |
| 腳位 10 | VDD — Positive supply (1.8V-3.6V) |
| 腳位 11 | RB7/KBI3/PGD — I/O / ICD data |
| 腳位 12 | RB6/KBI2/PGC — I/O / ICD clock |
| 腳位 13 | RB5/AN13/KBI1 — I/O / ADC channel |
| 腳位 14 | RB4/AN11/KBI0 — I/O / ADC channel |
| 腳位 15 | RB3/CCP2/AN8 — I/O / capture/compare / ADC |
| 腳位 16 | RB2/CCP1/AN9 — I/O / capture/compare / ADC |
| 腳位 17 | RB1/AN10/INT1 — I/O / ADC / external interrupt |
| 腳位 18 | RB0/AN12/INT0 — I/O / ADC / external interrupt |
| 腳位 19 | VDD — Positive supply (1.8V-3.6V) |
| 腳位 20 | VSS — Ground reference |
| 腳位 21 | RC7/RX/DT — I/O / EUSART RX |
| 腳位 22 | RC6/TX/CK — I/O / EUSART TX |
| 腳位 23 | RC5/SDO — I/O / SPI data out |
| 腳位 24 | RC4/SDA/SDI — I/O / I2C data / SPI data in |
| 腳位 25 | RC3/SCL/SCK — I/O / I2C clock / SPI clock |
| 腳位 26 | RC2/CCP1 — I/O / capture/compare |
| 腳位 27 | RC1/CCP2 — I/O / capture/compare |
| 腳位 28 | RC0 — I/O |
典型應用
PIC18LF24K22T-I/MV 適用於 6 應用s: Battery-Powered Wireless Sensor Node, Wearable Fitness/Health Monitor, Industrial Sensor Interface Module, Capacitive Touch User Interface, USB-to-Serial Bridge Firmware, Low-Power IoT Edge Node.
Battery-Powered Wireless Sensor Node
The PIC18LF24K22T-I/MV fits battery-powered wireless sensor nodes thanks to its nanoWatt XLP technology, achieving sleep currents below 100 nA. The 1.8V-3.6V supply aligns directly with single-cell Li-coin or 2xAA battery chemistries, eliminating the need for a boost regulator. The 64 MHz CPU (16 MIPS) handles on-sensor DSP for temperature, humidity, or vibration pre-processing, while the 12-bit ADC provides calibrated readings across 17 channels. Engineers pair this MCU with sub-GHz transceivers via SPI/EUSART to achieve 5-10 year battery life on standard coin cells.
推薦
Wearable Fitness/Health Monitor
Wearable health monitors demand a tiny footprint and minimal sleep current - both delivered by the PIC18LF24K22T-I/MV in its 4x4 mm UQFN-28 package. The CTMU peripheral enables capacitive touch button or slider input on the watch band without dedicated touch ICs, while the 12-bit ADC captures heart-rate or SpO2 signals. Combined with EUSART + MSSP peripherals, the MCU drives a BLE module (e.g., RN4871) for phone connectivity. The low-voltage LF design draws <500 nA in deep sleep, preserving battery life between user interactions.
推薦
Industrial Sensor Interface Module
In industrial 4-20 mA sensor modules and RTU front-ends, the PIC18LF24K22T-I/MV acts as the local MCU converting analog inputs into digital Modbus RTU frames. Its 12-bit ADC with 17 channels multiplexes multiple sensor inputs, while the two EUSARTs handle RS-485 and debug console independently. The industrial -40C to +85C temperature rating allows deployment in factory automation cabinets. The 28-UQFN package lets the design fit on a 25 mm x 30 mm PCB, typical for DIN-rail-mounted analog modules.
推薦
Capacitive Touch User Interface
Capacitive touch human-machine interfaces (HMIs) - including white-good front panels, smart thermostats, and POS keypads - benefit from the PIC18LF24K22T-I/MV's integrated CTMU and mTouch firmware library. The CTMU measures sub-picofarad capacitance changes without external timing components, supporting 8-12 touch channels across the 28-UQFN GPIO. Combined with the PWM/ECCP modules for backlight dimming and EUSART for host communication, this MCU provides a complete touch UI solution in a single chip, eliminating dedicated touch controllers and reducing BOM cost.
推薦
USB-to-Serial Bridge Firmware
The PIC18LF24K22T-I/MV implements a USB-to-UART bridge by pairing with Microchip's MCP2200 or by directly using the 28-UQFN's USB-capable variant logic. Two EUSARTs support simultaneous debug-console and application-data serial links. The 16 KB Flash hosts Microchip's USB stack and CDC-class firmware, while 768-byte RAM handles USB endpoint buffers. This configuration is widely used in industrial programming tools, firmware-updater dongles, and POS peripherals requiring both USB host connectivity and field-bus serial.
推薦
Low-Power IoT Edge Node
IoT edge nodes deployed in field installations run the PIC18LF24K22T-I/MV as a sensor aggregator and protocol translator. The 64 MHz CPU executes MQTT-SN or CoAP publish routines, while nanoWatt XLP drops standby current to nanoampere levels between transmissions. The MSSP peripherals drive LoRa or sub-GHz transceivers, and the 12-bit ADC reads analog field sensors. The 28-UQFN (4x4 mm) footprint allows the design to fit within IP67-rated enclosures for outdoor deployment.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18LF24K22T-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 | PIC18LF24K22-I/MV | PIC18LF24K22T-I/ML | PIC18LF23K22T-I/MV | PIC18LF23K22-I/MV | PIC18F24K22T-I/MV | PIC18LF23K22T-I/ML |
|---|---|---|---|---|---|---|---|
| Package | 28-UQFN (4x4) | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same | 28-UQFN (4x4) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 1.8V - 3.6V (LF) | 1.8V - 3.6V (LF) | 1.8V - 3.6V (LF) | 1.8V - 3.6V (LF) | 1.8V - 3.6V (LF) | 1.8V - 5.5V (F) | 1.8V - 3.6V (LF) |
| Flash Program Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Data RAM | 768 bytes | 768 bytes | 768 bytes | 512 bytes | 512 bytes | 768 bytes | 512 bytes |
| Maximum CPU Clock | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
| Packaging Suffix | Tape & Reel (T) | Tray (no T) | Tape & Reel (T) | Tape & Reel (T) | Tray | Tape & Reel (T) | Tape & Reel (T) |
主要差異化特點
- Low-voltage LF variant with nanoWatt XLP (對比PIC18F24K22T-I/MV)
- Full 28-pin complement on 28-UQFN footprint (對比PIC18LF23K22T-I/MV)
- Industrial -40C to +85C operating temperature (對比consumer-grade PIC18LF parts)
設計說明
Do not apply more than 3.6V to VDD on the PIC18LF24K22T-I/MV. The "LF" variant is the low-voltage version; the PIC18F24K22T-I/MV (5V-tolerant) is pin-compatible but is NOT recommended for drop-in if you have nearby 5V transients. For mixed-voltage designs, use the "F" part instead. Always confirm the full system maximum rail before PCB layout.
Estimated: at 3.3V VDD with CPU active at 64 MHz, the core draws roughly 8-10 mA per the K22 family datasheet. Decouple VDD with a 100 nF X7R ceramic placed within 3 mm of pins 10 and 19, plus a bulk 1-10 uF tantalum. For low-noise analog (ADC, VREF+), place a separate filtered AVSS/AVDD pair if used, or use the dedicated VREF+ pin with its own 1 uF bypass.
The 28-UQFN exposed thermal pad (pin 29, sometimes shown as pad below pin 28) MUST be soldered to the PCB ground plane for mechanical robustness and thermal dissipation. Use an array of thermal vias connecting the pad to a continuous ground pour on the opposite PCB layer. Failure to solder the pad can cause intermittent JTAG connection and high junction temperatures under load.
Reserve PGC (RB6) and PGD (RB7) for ICSP/ICD programming access. If the application requires these pins as GPIOs, add 4.7 kohm isolation resistors or solder-jumpers to permit in-circuit programming without affecting user circuitry. MCLR must be pulled up to VDD through a 10 kohm resistor, with a 100 nF capacitor to ground for ICSP entry.
合規資訊
Lead-free and RoHS-compliant per Microchip product page. Industrial temperature grade (-40C to +85C) marked by "I" suffix. Not AEC-Q100 qualified - choose AEC-Q100-grade parts (e.g., PIC18FxxKxx with /VAO suffix) for automotive applications.
