PIC18LF24K40-E/SO - 8-bit XLP MCU 16KB Flash 28-SOIC | Microchip
MPN： PIC18LF24K40-E/SO ✓ 啟用中PIC18LF24K40-E/SO 概覽
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory (Flash), volatile data memory (RAM), EEPROM for user data, and a set of analog and digital peripherals around a Harvard architecture core. PIC18 MCUs sit within Microchip's PIC family hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. They are widely deployed where deterministic timing, low power consumption, and small package size matter more than raw compute throughput.
Key features include a 10-bit ADC with Computation (ADCC) supporting Capacitive Voltage Divider (CVD) for advanced touch sensing, a 5-bit DAC, two comparators, PWM, CCP, CWG (Complementary Waveform Generator), HLT (Hardware Limit Timer), Windowed Watchdog Timer (WWDT), CRC/SCAN, Zero-Cross Detection (ZCD), and Peripheral Pin Select (PPS) for flexible signal routing. Communication is provided by EUSART, SPI, and I2C. The XLP core enables typical sleep currents in the nanoamp range.
The PIC18LF24K40 architecture uses an enhanced mid-range 8-bit core with a modified Harvard bus, hardware multiplier, and 31-level hardware stack, supporting C and assembly development under MPLAB X IDE with the XC8 toolchain. PPS allows peripheral signals to be remapped to multiple I/O pins, simplifying PCB layout. The device operates across 1.8 V to 3.6 V (LF variant), making it ideal for 2-cell battery or regulated 3.3 V systems.
Typical applications include battery-powered IoT sensor nodes, capacitive touch user interfaces, low-power remote controls, HVAC sensor transmitters, small home appliances, and industrial sensor conditioning. The combination of ADCC touch support and XLP sleep current suits wearables and energy-harvesting designs.
When designing with this device, allocate adequate decoupling (100 nF plus 1 uF near VDD) and respect the 1.8 V minimum at full speed. Use PPS to optimize pin assignments for the application rather than hardwiring peripherals to multiple PIC pins. For touch electrodes, follow the CVD layout guidelines in the datasheet.
This page synthesizes distributor pricing, parametric comparison, and design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 PIC18LF24K40-E/SO — 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： PIC18LF24K40-E/SO （相同外形與佔位） — 差異在於 ADC, Package, Program Memory (Flash), Communication, Comparators.
PIC18F24K40-E/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF24K40-E/SP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC18LF25K40-E/SO
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18LF24K40-E/SO 最大額定值與電氣特性
| Product Family | PIC18 (8-bit XLP) |
| Core | PIC18 8-bit enhanced mid-range |
| CPU Speed | 64 MHz (16 MIPS) |
| Program Memory (Flash) | 16 KB (8K x 14) |
| RAM | 1 KB |
| EEPROM | 256 B |
| Supply Voltage (LF) | 1.8 V to 3.6 V |
| ADC | 10-bit with Computation (ADCC), supports CVD touch |
| DAC | 5-bit |
| Comparators | 2 |
| Communication | EUSART, SPI, I2C |
| PWM / CCP / CWG | PWM, CCP, Complementary Waveform Generator |
| Special Peripherals | WWDT, CRC/SCAN, ZCD, PPS, HLT |
| 工作溫度 | -40C to +125C (E = Extended) |
| 封裝 | 28-pin SOIC (0.295", 7.50 mm width) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
PIC18LF24K40-E/SO 腳位配置
| 腳位 1 | MCLR/RE3 — Master Clear with internal pull-up or digital I/O RE3 |
| 腳位 2 | RA0 — I/O with analog input |
| 腳位 3 | RA1 — I/O with analog input |
| 腳位 4 | RA2 — I/O with analog input |
| 腳位 5 | RA3 — I/O with analog input |
| 腳位 6 | RA4 — I/O |
| 腳位 7 | RA5 — I/O |
| 腳位 8 | RA6 — I/O |
| 腳位 9 | RA7 — I/O |
| 腳位 10 | VSS — Ground reference |
| 腳位 11 | RB0 — I/O with interrupt-on-change |
| 腳位 12 | RB1 — I/O with interrupt-on-change |
| 腳位 13 | RB2 — I/O with interrupt-on-change |
| 腳位 14 | RB3 — I/O with interrupt-on-change |
| 腳位 15 | RB4 — I/O with interrupt-on-change |
| 腳位 16 | RB5 — I/O with interrupt-on-change |
| 腳位 17 | RB6 — I/O with interrupt-on-change, ICDCLK |
| 腳位 18 | RB7 — I/O with interrupt-on-change, ICDDAT |
| 腳位 19 | VSS — Ground reference (second VSS pin) |
| 腳位 20 | VDD — Positive supply voltage |
| 腳位 21 | RC0 — I/O |
| 腳位 22 | RC1 — I/O |
| 腳位 23 | RC2 — I/O |
| 腳位 24 | RC3 — I/O |
| 腳位 25 | RC4 — I/O |
| 腳位 26 | RC5 — I/O |
| 腳位 27 | RC6 — I/O |
| 腳位 28 | RC7 — I/O |
典型應用
PIC18LF24K40-E/SO 適用於 6 應用s: Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, HVAC Sensor Transmitter, Low-Power Remote Control, Industrial Sensor Conditioning, Small Home Appliance Controller.
Battery-Powered IoT Sensor Node
The PIC18LF24K40-E/SO fits battery-powered IoT sensor nodes because its XLP core delivers nanoamp sleep currents and 1.8 V operation allows 2 x AA cells to drain below 2.0 V. The 16 KB Flash hosts a sensor + radio driver stack while the 10-bit ADCC digitizes analog sensors with hardware averaging. The 28-SOIC footprint gives compact PCB integration for sub-coin-cell footprints.
推薦
Capacitive Touch User Interface
The PIC18LF24K40-E/SO is purpose-built for capacitive touch UI via its ADCC peripheral implementing Capacitive Voltage Divider (CVD) techniques. Touch buttons, sliders, and proximity wake-on-approach can run with no external touch IC, lowering BOM cost. The 64 MHz core provides responsive scan latency and the 16 KB Flash stores touch firmware and UI state machines.
推薦
HVAC Sensor Transmitter
For HVAC sensor transmitters the PIC18LF24K40-E/SO's XLP sleep mode enables multi-year battery life on 2 x AA cells while its 10-bit ADCC digitizes temperature and humidity sensors with hardware oversampling. The 5-bit DAC generates 0-5 V proportional outputs for legacy 4-20 mA loops when used with the F variant, and EUSART connects to wired HVAC bus networks.
推薦
Low-Power Remote Control
The PIC18LF24K40-E/SO fits coin-cell-powered remote controls because its nanoamp sleep currents and 1.8 V minimum extend battery life to multi-year horizons. The integrated IR-capable PWM and EUSART drive infrared LEDs directly, while the ADCC supports low-battery voltage monitoring without external ADC chips. PPS remaps peripherals to optimize PCB layout for compact enclosures.
推薦
Industrial Sensor Conditioning
For industrial sensor signal conditioning the PIC18LF24K40-E/SO offers 10-bit ADCC for transducer readout, hardware comparators for threshold detection, and ZCD for AC-mains synchronization. The CRC/SCAN peripheral ensures data integrity over noisy factory buses, while SPI/I2C connect to digital sensors or industrial EEPROM. Use the PIC18F24K40-E/SO when 5 V tolerance is required.
推薦
Small Home Appliance Controller
The PIC18LF24K40-E/SO drives small home appliances like coffee makers, blenders, and air purifiers because its CWG peripheral generates complementary PWM for motor control, its 5-bit DAC trims analog setpoints, and its compact 28-SOIC fits space-constrained enclosures. The WWDT windowed watchdog provides IEC 60730 safety compliance for Class B appliances.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18LF24K40-E/SO — 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 | PIC18F24K40-E/SO | PIC18LF24K40-E/SP | PIC18LF25K40-E/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (0.295") | 28-SOIC (0.295") - same | 28-SPDIP - through-hole | 28-SOIC (0.295") - same |
| Supply Voltage | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Flash | 16 KB | 16 KB | 16 KB | 32 KB |
| RAM | 1 KB | 1 KB | 1 KB | 2 KB |
| CPU Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| ADC | 10-bit ADCC | 10-bit ADCC | 10-bit ADCC | 10-bit ADCC |
| XLP / Low-Power | Yes (LF variant) | Yes (F variant) | Yes (LF variant) | Yes (LF variant) |
主要差異化特點
- Lowest voltage range in the 28-SOIC PIC18 K40 family (對比PIC18F24K40-E/SO)
- Cost-optimized memory vs 25K40 variant (對比PIC18LF25K40-E/SO)
- Same die in through-hole package for prototyping (對比PIC18LF24K40-E/SP)
設計說明
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 20), with a 1 uF bulk capacitor on the same rail. For battery-powered designs, use the PIC18LF variant's 1.8 V minimum to drain cells below 2.0 V. Configure unused pins as outputs low to minimize leakage current, and route ADC inputs through PPS to allow power-down of unused channels.
Do not operate the PIC18LF24K40 above 64 MHz or below 1.8 V - both violate the LF voltage/frequency derating curve. When migrating to the PIC18F24K40-E/SO ensure the rail voltage is 2.3 V or higher, or the Brown-Out Reset (BOR) will trigger continuously. Use PPS to remap peripherals rather than hardwiring to avoid PCB respins when the firmware demands pin reassignment.
For capacitive touch via the ADCC peripheral, follow the CVD layout guidelines in the datasheet: keep touch traces short, surround them with a hatched ground pour, and route away from switching signals. Add a 10-100 k series resistor on the touch pin to suppress EMI. Use the hardware oversampling feature to improve SNR rather than software averaging to reduce CPU wake time and total energy per scan.
The PIC18LF24K40-E/SO is a low-power CMOS device and thermal management is rarely an issue, but in extended temperature (-40C to +125C) industrial applications verify timing margins with the temperature-voltage derating curves in the datasheet. Above 85C ambient, the maximum CPU frequency decreases; derate accordingly. The 28-SOIC package has good thermal conduction through its leads for moderate-power designs.
合規資訊
RoHS and REACH compliance standard for Microchip PIC18 K40 family. Not AEC-Q100 qualified - select -V (automotive) suffix variants for AEC-Q100.
