PIC18LF25K40-E/SP - 32KB Flash 8-Bit MCU 28-SPDIP | Microchip
MPN: PIC18LF25K40-E/SP ✓ Hoạt độngPIC18LF25K40-E/SP Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, typically used for embedded control where deterministic real-time response, low cost, and low power are more important than raw computational throughput. PIC18F/LF-series MCUs belong to the higher-end 8-bit family from Microchip, sitting above the PIC10/16 base lines and below the 16-bit dsPIC/PIC24 families, and they integrate analog, communication, and Core Independent Peripherals (CIPs) directly on-chip to reduce external component count.
Key features include a 16 MIPS execution speed at 64 MHz, an integrated 10-bit ADC with up to 35 channels, a 5-bit DAC, two comparators, 4 hardware PWM/CCP/CWG channels, hardware Windowed Watchdog Timer (WWDT), CRC/SCAN, Zero-Cross Detect (ZCD), and Peripheral Pin Select (PPS) for flexible signal routing. The XLP technology enables nanoWatt deep-sleep currents suitable for battery-powered or energy-harvesting products, while the LF prefix denotes the 1.8-3.6V VDD operating range targeting low-voltage systems.
The PIC18LF25K40 uses a Harvard RISC architecture with a 16-bit instruction word and 8-bit data path, providing deterministic instruction timing and a single-cycle hardware multiply. Core Independent Peripherals such as CWG (Complementary Waveform Generator), hardware limit timer (HLT) and CRC/SCAN enable autonomous operation without CPU intervention, reducing firmware complexity and improving system reliability.
Typical applications include low-power IoT sensor nodes, battery-powered home automation, industrial control with analog front ends, motor control loops, and any 5V-tolerant design where XLP sleep current is the key selection factor. The 28-SPDIP package is preferred for hand-soldered prototypes, educational platforms, and through-hole industrial modules.
When designing with this MCU, ensure that the LF (low-voltage) variant is used only when VDD stays within 1.8-3.6V; for 5V rails select the PIC18F25K40-I/SP variant. Decoupling and PPS configuration should follow the manufacturer datasheet typical application circuit.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the bare manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF25K40-E/SP — 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 PIC18LF25K40-E/SP (cùng hình factor và footprint) — khác nhau ở Package, ADC, Comparators, Core, Program Memory (Flash).
PIC18F25K40-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F25K40-E/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF24K40-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF24K40-E/SP
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF24K22-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF23K22-E/SP
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF25K40-E/SP Tỷ lệ tối đa & tính chất điện
| Series | PIC XLP 18K |
| Core | PIC18 (8-bit RISC, Harvard) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data SRAM | 2 KB |
| Data EEPROM | 256 B |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Operating Voltage (VDD) | 1.8 V to 3.6 V (LF variant) |
| I/O Pins | 25 |
| ADC | 10-bit, up to 35 channels |
| DAC | 5-bit, 1 channel |
| Comparators | 2 |
| PWM / CCP / CWG Channels | 4 (CCP), 4 (PWM), 1 (CWG) |
| Hộp | 28-SPDIP (Skinny Plastic DIP, 7.62 mm row pitch, through-hole) |
| Nhiệt độ hoạt động | -40 C to +125 C (E = Extended) |
| Kiểu lắp đặt | Through-Hole |
| XLP Sleep Current | nanoWatt range (see datasheet DC characteristics) |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 1 (unsealed/through-hole, not moisture sensitive) |
| Core Independent Peripherals | CWG, WWDT, CRC/SCAN, HLT, ZCD, Hardware CVD, SMT-PWM |
Cấu hình chân PIC18LF25K40-E/SP
| Chân 1 | MCLR — Master Clear (Reset) input, active low; pull-up to VDD required |
| Chân 2 | RA0 — PORTA bit 0, analog-capable (PPS I/O) |
| Chân 3 | RA1 — PORTA bit 1, analog-capable (PPS I/O) |
| Chân 4 | RA2 — PORTA bit 2, analog-capable (PPS I/O) |
| Chân 5 | RA3 — PORTA bit 3, analog-capable (PPS I/O) |
| Chân 6 | RA4 — PORTA bit 4, analog-capable (PPS I/O) |
| Chân 7 | RA5 — PORTA bit 5, analog-capable (PPS I/O) |
| Chân 8 | RA6 — PORTA bit 6, analog-capable (PPS I/O) |
| Chân 9 | RA7 — PORTA bit 7, analog-capable (PPS I/O) |
| Chân 10 | GND — Ground reference |
| Chân 11 | VDD — Positive supply (1.8-3.6V LF) |
| Chân 12 | RB0 — PORTB bit 0, analog-capable (PPS I/O) |
| Chân 13 | RB1 — PORTB bit 1, analog-capable (PPS I/O) |
| Chân 14 | RB2 — PORTB bit 2, analog-capable (PPS I/O) |
| Chân 15 | RB3 — PORTB bit 3, analog-capable (PPS I/O) |
| Chân 16 | RB4 — PORTB bit 4, analog-capable (PPS I/O) |
| Chân 17 | RB5 — PORTB bit 5, analog-capable (PPS I/O) |
| Chân 18 | RB6 — PORTB bit 6, analog-capable (PPS I/O); ICSPCLK on PICkits |
| Chân 19 | RB7 — PORTB bit 7, analog-capable (PPS I/O); ICSPDAT on PICkits |
| Chân 20 | GND — Ground reference |
| Chân 21 | VDD — Positive supply (1.8-3.6V LF) |
| Chân 22 | RC0 — PORTC bit 0, analog-capable (PPS I/O) |
| Chân 23 | RC1 — PORTC bit 1, analog-capable (PPS I/O) |
| Chân 24 | RC2 — PORTC bit 2, analog-capable (PPS I/O) |
| Chân 25 | RC3 — PORTC bit 3, analog-capable (PPS I/O) |
| Chân 26 | RC4 — PORTC bit 4, analog-capable (PPS I/O) |
| Chân 27 | RC5 — PORTC bit 5, analog-capable (PPS I/O) |
| Chân 28 | RC6 — PORTC bit 6, analog-capable (PPS I/O) |
Ứng dụng tiêu biểu
PIC18LF25K40-E/SP phù hợp cho 6 Áp dụngs: Battery-Powered IoT Sensor Node, Industrial Analog Monitoring & Control, Home Automation & Smart Home Devices, Motor Control & PWM Driver Hub, Consumer Electronics Handheld Devices, Educational & Hobby Electronics.
Battery-Powered IoT Sensor Node
The PIC18LF25K40-E/SP is purpose-built for low-voltage 1.8-3.6V battery-powered IoT sensor nodes where XLP nanoWatt sleep current extends operational lifetime beyond 10 years on a coin cell. Its 32 KB Flash and 2 KB SRAM accommodate over-the-air firmware update staging plus interrupt-driven sensor sampling logic without external memory. The 10-bit ADC with up to 35 channels directly digitizes temperature, light, and battery-voltage sensors; the 5-bit DAC and two comparators drive threshold-based wakeup circuits without CPU intervention. Drawing only nanoamps in deep-sleep with RTC running, this MCU converts a single AA alkaline or coin-cell into a multi-year wireless sensor product. PPS provides flexible remapping of UART/SPI/I2C pins to optimize PCB routing. Recommended companions include Microchip MCP9808 temperature sensor, MCP16252 boost regulator, and MRF24WN0MA Wi-Fi module.
Được đề xuất
Industrial Analog Monitoring & Control
The PIC18LF25K40-E/SP integrates a 10-bit ADC with up to 35 channels, a 5-bit DAC, two comparators and a hardware CWG (Complementary Waveform Generator), making it ideal for industrial analog monitoring modules that read 4-20 mA loops, RTDs, or 0-10 V process signals and drive PWM or DAC outputs. The -40 to +125 C extended operating temperature handles outdoor cabinets, factory floors, and motor drive vicinity. CRC/SCAN periodically validates Flash integrity which is critical for unattended industrial installations. Peripheral Pin Select (PPS) routes UART/SPI/I2C signals to almost any I/O pin, allowing single PCB layout reuse across multiple industrial SKUs. The 28-SPDIP through-hole package supports hand-soldered or socket-mounted prototyping for fast iteration. Recommended companions include MCP6024 quad op-amp, MCP2551 CAN transceiver and PICtail RS-485 module.
Được đề xuất
Home Automation & Smart Home Devices
The PIC18LF25K40-E/SP powers smart-home controllers such as dimmers, motorized blinds, occupancy sensors and HVAC controllers thanks to its 32 KB memory and Core Independent Peripherals (CIPs). Zero-Cross Detect (ZCD) enables AC line synchronization for phase-controlled TRIAC dimming without external zero-cross circuits; CWG generates complementary MOSFET drive for H-bridge blinds or blinds motors. Hardware Windowed Watchdog (WWDT) keeps the firmware safe against runaway states - mandatory for unattended appliances. The 1.8-3.6V VDD range supports 3.3V-powered battery-operated sensors (door/window sensors, leak detectors) while a companion DC-DC allows AC-powered thermostat skus. Recommended companions include Microchip MIC826 voltage supervisor, MCP1700 LDO regulator, and TPL9202 zero-cross TRIAC driver.
Được đề xuất
Motor Control & PWM Driver Hub
The PIC18LF25K40-E/SP serves as the central PWM and timer hub for small brushed-DC, BLDC and stepper motor control modules thanks to its dedicated 4 CCP, 4 PWM, 1 CWG and Hardware Limit Timer (HLT). HLT automatically terminates PWM in hardware on overcurrent or over-temperature events without CPU intervention - critical for safety-critical motor drive. CWG generates synchronized complementary signals for half-bridge MOSFET gate drivers eliminating deadtime controller ICs. The 10-bit ADC samples motor current through shunt resistors via on-chip comparators implementing cycle-by-cycle current limiting. For battery-powered 24V robotic platforms the 1.8-3.6V LF range permits direct MCU supply from a buck converter. Recommended companions include Microchip TC4427 gate driver, ACS712 current sensor and L6234 motor driver.
Được đề xuất
Consumer Electronics Handheld Devices
The PIC18LF25K40-E/SP fits handheld consumer products such as remote controls, fitness trackers, e-cigarettes and educational kits thanks to its nanoWatt XLP sleep current, compact 28-SPDIP footprint, and 2 KB SRAM sufficient for small user interfaces. The 10-bit ADC reads battery state-of-charge, button matrix via resistive ladder, and analog joystick inputs; the 5-bit DAC drives piezo buzzers for alerts or simple waveforms. CRC/SCAN prevents accidental firmware lockup - important for fitness bands that see long continuous use. The PIC XLP 18K series delivers typical deep-sleep currents measured in nanoamps allowing 6-month coin-cell operation in a pedometer or BLE beacon. Recommended companions include MCP1640 boost regulator, RN4871 Bluetooth module and MCP73831 Li-ion charger.
Được đề xuất
Educational & Hobby Electronics
The PIC18LF25K40-E/SP is widely used in university microcontroller courses, hobbyist electronics and DIY maker kits thanks to its through-hole 28-SPDIP package that fits breadboards and IC sockets without soldering. Its generous 32 KB Flash comfortably holds the MPLAB Xpress Code Examples and Arduino-style tutorials while 2 KB SRAM supports FreeRTOS or TinyOS teaching ports. The on-chip 10-bit ADC, PWM and comparator peripherals expose students to real mixed-signal embedded design without external ICs. The PICkit 4 and PICkit 5 in-circuit programmers and debuggers integrate seamlessly via ICSP pins RA6/RA7 for stepwise debugging. PIC18(L)F25K40 is also the MCU on the Curiosity HPC development board so the same code ports directly to PCB designs. Recommended companions include PICkit 5 programmer, MPLAB Snap debug tool, and a 28-pin narrow DIP socket.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF25K40-E/SP — 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 | PIC18F25K40-I/SP | PIC18F25K40-E/SP | PIC18LF24K40-I/SP | PIC18LF24K40-E/SP | PIC18LF24K22-I/SP |
|---|---|---|---|---|---|---|
| Package | 28-SPDIP | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 1.8-3.6 V (LF) | 4.0-5.5 V (F) | 4.0-5.5 V (F) | 1.8-3.6 V (LF) | 1.8-3.6 V (LF) | 1.8-3.6 V (LF) |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 1 KB | 1 KB | 768 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Temperature Grade | E (-40 to +125 C) | I (-40 to +85 C) | E (-40 to +125 C) | I (-40 to +85 C) | E (-40 to +125 C) | I (-40 to +85 C) |
| Core / CPU | PIC18 8-bit, 64 MHz / 16 MIPS | PIC18 8-bit, 64 MHz / 16 MIPS | PIC18 8-bit, 64 MHz / 16 MIPS | PIC18 8-bit, 64 MHz / 16 MIPS | PIC18 8-bit, 64 MHz / 16 MIPS | PIC18 8-bit, 64 MHz / 16 MIPS |
| Unit Price (qty 1, USD) | 3.15 | 3.20 | 3.30 | 2.85 | 2.95 | 2.60 |
Bảo phân biệt quan trọng
- XLP nanoWatt technology with LF 1.8-3.6V range (vsPIC18F25K40-I/SP (F variant, 4.0-5.5V))
- Extended -40 to +125 C temperature grade (vsPIC18LF25K40-I/SP (industrial I grade, -40 to +85 C))
- 28-SPDIP through-hole package for hand-soldered prototypes (vsPIC18LF25K40-I/SS (28-SSOP surface mount))
Ghi chú thiết kế
The PIC18LF25K40-E/SP LF variant operates from 1.8-3.6V VDD only. If your system supplies 5V, you must use the PIC18F25K40-I/SP (4.0-5.5V) variant. For LF designs drawing from a 3.3V LDO, ensure the LDO can supply peak transient currents during Flash erase/write operations - typical peak is 30-50 mA per bank during page write, much higher than the 5-15 mA runtime average. Add 100 nF + 10 uF ceramic decoupling at pins 11 and 21 (both VDD pairs), and a ferrite bead if switching noise is present on the rail.
Estimated: The 28-SPDIP package has a theta_JA of approximately 60 C/W in still air (typical for narrow plastic DIP), versus 31.4 C/W for VQFN-20 surface mount. At full 64 MHz CPU and peripheral activity, internal core dissipation is ~150 mW which yields a 9 C temperature rise above ambient. The SPDIP package is preferred for hand-soldered and educational designs where thermal performance is not the limiting factor; for thermally constrained products migrate to the 28-SOIC or 28-VQFN package siblings (PIC18LF25K40-I/SS or PIC18LF25K40-I/ML) to cut theta_JA in half.
1) Never leave MCLR (pin 1) floating - tie to VDD through a 10 kohm pull-up or to a supervisory reset IC. 2) PPS (Peripheral Pin Select) must be unlocked (PPSLOCK = 0x55, 0xAA sequence) before remapping UART/SPI/I2C, otherwise writes are silently ignored. 3) ICSP pins RB6/RB7 are shared with PORTB - the programmer drives these during debug; in-circuit isolation resistors may be needed if the application drives RB6/RB7 strongly. 4) The LF variant does NOT tolerate 5V on any I/O - over-voltage latches the I/O cell. Use the F variant for 5V-tolerant designs.
Place a 100 nF X7R 0402 (or 0603) ceramic decoupling capacitor within 5 mm of each VDD pin (11 and 21) and a bulk 10 uF X5R capacitor on the same supply net. The 28-SPDIP land pattern is 7.62 mm row pitch - use a DIP socket or wave-solder compatible pad. For microcontroller signal integrity, route the 64 MHz external crystal (if used instead of internal HFINTOSC) within 10 mm of OSC1/OSC2 with short symmetric ground return; or use the internal 64 MHz HFINTOSC to eliminate the crystal entirely for compact designs.
Thông tin tuân thủ
RoHS compliant per Microchip product page; lead-free matte-tin finish on SPDIP leads. AEC-Q100 qualification not applicable to E temperature grade SPDIP; automotive -FCCC- grade F variants (PIC18F25K40-E/SO Q1 etc.) available separately for AEC-Q100 designs. Halogen-free status not explicitly listed in the verified web data.
