PIC18LF25J10T-I/SO - 32KB Flash 8-bit MCU | Microchip
MPN： PIC18LF25J10T-I/SO ✓ 啟用中PIC18LF25J10T-I/SO 概覽
An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU, program memory, data RAM, and peripherals such as timers, communication, and ADC. The PIC18 family is Microchip's high-performance 8-bit line using a RISC architecture with hardware multiplier and 16-bit instruction word, bridging small 8-bit controllers and 32-bit MCUs in cost-sensitive embedded designs.
Key features include 32 KB Flash program memory (16K × 16 instruction words), 1024 bytes of SRAM, 21 digital I/O, internal oscillator, and nanoWatt power-saving modes. Peripheral integration supports timers, MSSP (SPI/I2C), enhanced USART, 10-bit ADC channels, and PWM, providing a complete system-on-chip for connected embedded products.
The PIC18LF25J10 architecture uses a 16-bit instruction path with an 8-bit data bus, allowing 32 KB of linear Flash and Harvard memory structure. The LF suffix indicates the low-voltage 2.0–3.6 V operating range, supporting battery-powered and portable designs. Peripherals are mapped through the standard PIC18 register set for predictable firmware reuse across the family.
Typical applications include consumer electronics, industrial control, USB peripherals, low-power sensor nodes, and battery-powered portable devices. The wide peripheral set and low power modes also suit home automation, IoT edge nodes, and human-interface products.
When designing with this device, mind the 2.0–3.6 V supply window (LF variant differs from 5 V F parts), keep VDD/VSS decoupling close to the package, and follow Microchip's in-circuit serial programming (ICSP) layout guidelines to preserve programming and debug access.
This page synthesizes distributor pricing, drop-in SOIC-28 alternatives from the same PIC18 family, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 PIC18LF25J10T-I/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： PIC18LF25J10T-I/SO （相同外形與佔位） — 差異在於 Package, ADC, Timers, Operating Temperature, Core.
PIC18LF25J10-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18F25J10-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF25J10T-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC18F25J10T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF24J10T-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18LF25J10T-I/SO 最大額定值與電氣特性
| Product Type | 8-bit Microcontroller (MCU) |
| Core | PIC18 RISC |
| Series | PIC18 J |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM Size | 1 KB |
| EEPROM Size | 0 (Flash-based) |
| Number of I/O Pins | 21 |
| Maximum CPU Frequency | 40 MHz |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| 工作溫度 | -40 °C to +85 °C |
| 封裝 / 外殼 | 28-SOIC (7.50 mm width) |
| 安裝類型 | Surface Mount |
| Oscillator | Internal |
| ADC | 10-bit |
| Packaging | Tape & Reel |
| RoHS 狀態 | Compliant |
| MSL 等級 | MSL1 / not specified (Tape & Reel) |
PIC18LF25J10T-I/SO 腳位配置
| 腳位 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| 腳位 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 腳位 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 腳位 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| 腳位 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| 腳位 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 腳位 7 | RA5/AN4/SS/HLVDIN — PORTA bit 5 / analog input 4 / SPI SS / HLVD input |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | OSC1/CLKI/RA7 — External oscillator input / PORTA bit 7 |
| 腳位 10 | OSC2/CLKO/RA6 — External oscillator output / PORTA bit 6 |
| 腳位 11 | VDD — Positive supply voltage |
| 腳位 12 | VSS — Ground reference |
| 腳位 13 | RB0/INT0/FLT0 — PORTB bit 0 / external interrupt 0 |
| 腳位 14 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| 腳位 15 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| 腳位 16 | RB3/INT3 — PORTB bit 3 / external interrupt 3 |
| 腳位 17 | RB4/KBI0 — PORTB bit 4 / keyboard interrupt 0 |
| 腳位 18 | RB5/KBI1/PGM — PORTB bit 5 / keyboard interrupt 1 / LVP prog |
| 腳位 19 | RB6/KBI2/PGC — PORTB bit 6 / keyboard interrupt 2 / ICSP clock |
| 腳位 20 | RB7/KBI3/PGD — PORTB bit 7 / keyboard interrupt 3 / ICSP data |
| 腳位 21 | RC0/T1CKI/T1OSO — PORTC bit 0 / Timer1 clock / T1 osc out |
| 腳位 22 | RC1/T1OSI/CCP2 — PORTC bit 1 / T1 osc in / CCP2 |
| 腳位 23 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| 腳位 24 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 腳位 25 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 腳位 26 | RC5/SDO — PORTC bit 5 / SPI data out |
| 腳位 27 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| 腳位 28 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
典型應用
PIC18LF25J10T-I/SO 適用於 6 應用s: Battery-Powered Sensor Nodes, Consumer Electronics Controllers, Industrial Control and Automation, USB HID / Low-Speed Peripherals, Home Automation / IoT Edge Nodes, Medical and Health Monitoring Devices.
Battery-Powered Sensor Nodes
The PIC18LF25J10T-I/SO operates from 2.0–3.6 V, making it ideal for battery-powered sensor nodes running directly from a 3.3 V coin-cell or 2× AA supply. Its 32 KB Flash fits sensor-fusion algorithms and BLE/Sub-GHz radio stacks, while 1 KB RAM handles small data buffers and 21 I/O drives multiple analog sensors. The internal oscillator eliminates an external crystal, reducing sleep-mode current draw critical for multi-year battery life in wireless sensor deployments.
推薦
Consumer Electronics Controllers
The PIC18LF25J10T-I/SO suits consumer appliances and human-interface products requiring USB or serial connectivity. With MSSP (SPI/I2C) and enhanced USART on-chip, designers can drive LCDs, keypads, sensors, and external Flash without glue logic. 32 KB Flash supports USB device stacks or BLE HCI bridges, while nanoWatt sleep modes suit always-on remote controls, toys, and home appliances with standby power regulations.
推薦
Industrial Control and Automation
The PIC18LF25J10T-I/SO provides industrial-grade peripherals for low-cost PLCs, motor controllers, and sensor interfaces. Its 10-bit ADC supports multiple analog channels for process variables, and PWMs drive solenoid valves, LEDs, or small DC loads. 32 KB Flash fits Modbus RTU or custom industrial protocols, while 40 MHz performance handles deterministic control loops. The -40 to +85 °C range operates in factory-floor cabinets.
推薦
USB HID / Low-Speed Peripherals
The PIC18LF25J10T-I/SO with 32 KB Flash and 1 KB RAM is well-suited for USB HID-class devices such as keyboards, mice, game controllers, and custom HID peripherals. Microchip's USB stack fits comfortably in 32 KB, while the LF voltage range aligns with USB-powered 3.3 V regulated rails. Designers benefit from MSSP for external peripherals and 21 I/O for switches, LEDs, and capacitive touch sensing.
推薦
Home Automation / IoT Edge Nodes
The PIC18LF25J10T-I/SO handles Zigbee, LoRa, or Wi-Fi host controller roles in home automation gateways and IoT edge nodes. Its 32 KB Flash supports OTA bootloader logic and lightweight mesh stacks, while nanoWatt modes reduce idle consumption below 1 µA. 21 I/O drives relays, sensors, and indicator LEDs. The 3.3 V supply aligns directly with ESP32, nRF, and similar wireless modules.
推薦
Medical and Health Monitoring Devices
The PIC18LF25J10T-I/SO powers portable health monitors such as glucose meters, pulse oximeters, and patient wearables. Its low-voltage operation suits battery-powered devices, while 32 KB Flash stores calibration tables and basic DSP for heart-rate or SpO2 processing. nanoWatt sleep modes extend battery life between measurements, and 21 I/O drives OLED displays, buttons, and analog front-ends for biosensors.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18LF25J10T-I/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 | PIC18LF25J10-I/SO | PIC18F25J10-I/SO | PIC18F25J10T-I/SO | PIC18LF24J10T-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Number of I/O | 21 | 21 | 21 | 21 | 21 |
| Supply Voltage | 2.0–3.6 V | 2.0–3.6 V | 4.2–5.5 V | 4.2–5.5 V | 2.0–3.6 V |
| Max CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Packaging | Tape & Reel | Tube | Tube | Tape & Reel | Tape & Reel |
主要差異化特點
- Low-voltage LF variant with same SOIC-28 footprint as 5 V F variant (對比PIC18F25J10-I/SO)
- Tape & Reel packaging for SMT production (對比PIC18LF25J10-I/SO)
- 32 KB Flash in 28-SOIC footprint (對比PIC18LF24J10T-I/SO)
設計說明
Estimated: at 40 MHz CPU and 3.3 V supply, the PIC18LF25J10 draws approximately 12–15 mA active; in Sleep mode (Timer1 off) the device drops below 1 µA per the PIC18LF datasheet DC characteristics. Add a 100 nF ceramic decoupling capacitor directly between VDD (pin 11) and VSS (pin 12), placed within 3 mm of the package. Place a bulk 10 µF tantalum or ceramic on the board input to handle inrush from digital switching. The 'LF' suffix confirms 2.0–3.6 V operation; do not exceed 3.6 V or EEPROM corruption may occur.
Keep the ICSP lines (RB6/PGC, RB7/PGD, MCLR/VPP) accessible. Per Microchip's ICSP layout guidelines, do not place series resistors above 1 kΩ on PGC/PGD, and ensure MCLR has its recommended 10 kΩ pull-up. Route PGC/PGD traces away from noisy switching signals to avoid programming errors. Leave a clear 5 mm exclusion zone around the SOIC-28 footprint for test clips.
A common mistake is to apply 5 V to the LF variant - this exceeds the 3.6 V absolute maximum and risks immediate damage to the Flash memory. For 5 V systems, use the PIC18F25J10 variant (same pinout). Another pitfall is omitting the decoupling capacitor at VDD/VSS, causing reset glitches during ADC sampling. Always configure unused I/O pins as outputs and tie them to VSS or VDD to minimize current draw.
合規資訊
RoHS compliant per DigiKey/Mouser product listings and Microchip product page. Not AEC-Q100 qualified - this is a general-purpose MCU, not an automotive-grade device.
