PIC18F25K40-E/SO - 8-Bit MCU, 32KB Flash, 28-Pin SOIC | Microchip
料号： PIC18F25K40-E/SO ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.2 | $22.00 |
| 100 | $1.85 | $185.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.32 | $1,320.00 |
PIC18F25K40-E/SO 概述
An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, memory (Flash/ROM, RAM, EEPROM), and integrated peripherals on a single silicon die. The PIC18 architecture uses a C-compiler-optimized RISC instruction set with 16-bit instructions, occupying a hierarchical position of MCU -> 8-bit MCU -> RISC MCU -> embedded controller -> semiconductor. The PIC18F25K40 belongs to the PIC18F K40 sub-family, optimized for XLP (eXtreme Low Power) operation while retaining 5V tolerance for mixed-signal environments.
Key features include Core Independent Peripherals such as the Complementary Waveform Generator (CWG), Windowed Watchdog Timer (WWDT), CRC/SCAN memory integrity checking, a 10-bit ADC with computation, a 5-bit DAC, and configurable logic cells. The device operates from 3.0V to 5.5V supply and supports nanoWatt XLP sleep currents below 50 nA in deep sleep, making it suitable for always-on battery applications. The integrated peripheral set reduces external component count.
Architecturally, the PIC18F25K40 uses a Harvard-style bus with separate instruction and data paths, enabling single-cycle execution for most instructions except branches. The 64 MHz internal oscillator and 4x PLL deliver 16 MIPS throughput, while the 10-bit ADC with acquisition timer and threshold compare can trigger peripherals autonomously without CPU wake-up, preserving energy.
Typical applications include industrial sensor conditioning nodes, low-power IoT endpoints, appliance control panels, automotive body electronics, LED lighting controllers, and consumer white goods. The combination of XLP nanoWatt technology, ample memory, and core-independent peripherals addresses both battery-powered and line-powered designs.
When designing with this part, choose the SOIC-28 footprint when through-hole assembly is not required and PCB height is constrained. For AEC-Q100 automotive qualification, consider the PIC18F25K40-E/SO automotive variant. Plan for ICSP programming header access on the PCB.
This page synthesizes distributor pricing, drop-in alternatives, and engineering design notes for engineers evaluating the PIC18F25K40-E/SO for new designs or as a replacement part.
直接替换替代料： PIC18F25K40-E/SO ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18F25K40-E/SO （相同外形与封装尺寸） ——差异在于 ADC, Program Memory (Flash), Package, DAC, Supply Voltage (VDD).
快速对比工具——选择替代料号进行并排对比：
PIC18F25K40-I/SO
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F25K40T-I/SO
✅ 直接替换✓ 有现货
$1.6 / 个
查看数据手册 →PIC18F24K40-E/SO
✅ 直接替换✓ 有现货
$1.2 / 个
查看数据手册 →PIC18F25K40-E/SS
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.89 / 个
查看数据手册 →PIC18F25K22-I/SO
✅ 直接替换✓ 有现货
$1.78 / 个
查看数据手册 →PIC18F25K20-I/SO
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.55 / 个
查看数据手册 →PIC18F25K40-E/SO 最大额定值与电气特性
| CPU Core | PIC18 (8-bit RISC) |
| Program Memory (Flash) | 32 KB |
| Data SRAM | 2 KB (2048 bytes) |
| Data EEPROM | 256 bytes |
| 最大时钟频率 | 64 MHz |
| CPU Speed (MIPS) | 16 MIPS |
| Supply Voltage Range | 3.0 V to 5.5 V |
| 工作温度范围 | -40 C to +125 C (E = Extended) |
| ADC | 10-bit ADC2 (with computation) |
| DAC | 5-bit DAC |
| Package Type | SOIC-28 (SO, 300 mil wide body) |
| 安装类型 | Surface Mount |
| Communication Interfaces | UART, I2C, SPI, EUSART |
| Core Independent Peripherals | CWG, WWDT, CRC/SCAN, CLC |
| Low-Power Technology | nanoWatt XLP |
| RoHS 状态 | Compliant |
| MSL 等级 | 1 |
PIC18F25K40-E/SO 引脚配置
| 引脚 1 | RA0/ANA0/C1IN0-/C2IN0-/C3IN0-/C4IN0-/C5IN0-/C6IN0-/C7IN0-/C8IN0-/U1CTSR — Bidirectional I/O / analog input / comparator input / UART1 clear-to-send |
| 引脚 2 | RA1/ANA1/C1IN1-/C2IN1-/C3IN1-/C4IN1-/C5IN1-/C6IN1-/C7IN1-/C8IN1-/U1RXR — Bidirectional I/O / analog input / comparator input / UART1 RX |
| 引脚 3 | RA2/ANA2/C1IN0+/C2IN0+/C3IN0+/C4IN0+/C5IN0+/C6IN0+/C7IN0+/C8IN0+/VREF-/ZCD — Bidirectional I/O / analog input / comparator positive / VREF- / zero-cross detect |
| 引脚 4 | RA3/ANA3/C1IN1+/C2IN1+/C3IN1+/C4IN1+/C5IN1+/C6IN1+/C7IN1+/C8IN1+/VREF+ — Bidirectional I/O / analog input / comparator positive / VREF+ |
| 引脚 5 | RA4/ANA4/C1OUT/SRCLK/T0CKI — Bidirectional I/O / analog input / comparator output / SR latch clock / Timer0 clock |
| 引脚 6 | RA5/ANA5/MCLR — Bidirectional I/O / analog input / Master Clear (reset) input |
| 引脚 7 | RA6/ANA6/OSC2/CLKOUT — Bidirectional I/O / analog input / oscillator output / clock output |
| 引脚 8 | RA7/ANA7/OSC1/CLKIN — Bidirectional I/O / analog input / oscillator input / external clock in |
| 引脚 9 | VSS — Ground reference |
| 引脚 10 | VDD — Positive supply voltage (3.0V to 5.5V) |
| 引脚 11 | RB0/ZCD1/ANB0/C2IN1+/CWG1IN1/CCP4/INT0 — Bidirectional I/O / ZCD input / analog input / comparator positive / CWG input / CCP4 / external interrupt 0 |
| 引脚 12 | RB1/ANB1/C1IN3-/C2IN3-/C3IN1+/C4IN1+/C5IN1+/C6IN1+/C7IN1+/C8IN1+/SCL1/SCK1 — Bidirectional I/O / analog input / comparator input / I2C1 SCL / SPI1 SCK |
| 引脚 13 | RB2/ANB2/C1IN2-/C2IN2-/C3IN2-/C4IN2-/C5IN2-/C6IN2-/C7IN2-/C8IN2-/SDA1/SDI1 — Bidirectional I/O / analog input / comparator input / I2C1 SDA / SPI1 SDI |
| 引脚 14 | RB3/ANB3/C1IN0-/C2IN0-/C3IN0-/C4IN0-/C5IN0-/C6IN0-/C7IN0-/C8IN0-/PWM4/SS1 — Bidirectional I/O / analog input / comparator input / PWM4 / SPI1 SS |
| 引脚 15 | RB4/ANB4/C2IN1-/C3IN1-/C4IN1-/C5IN1-/C6IN1-/C7IN1-/C8IN1-/PWM5 — Bidirectional I/O / analog input / comparator input / PWM5 |
| 引脚 16 | RB5/ANB5/C1IN2+/C2IN2+/C3IN0+/C4IN0+/C5IN0+/C6IN0+/C7IN0+/C8IN0+/PWM6 — Bidirectional I/O / analog input / comparator positive / PWM6 |
| 引脚 17 | RB6/ANB6/ICSPCLK — Bidirectional I/O / analog input / ICSP clock |
| 引脚 18 | RB7/ANB7/ICSPDAT — Bidirectional I/O / analog input / ICSP data |
| 引脚 19 | RC0/ANC0/CWG1IN0 — Bidirectional I/O / analog input / CWG input 0 |
| 引脚 20 | RC1/ANC1/CWG1FLT — Bidirectional I/O / analog input / CWG fault input |
| 引脚 21 | RC2/ANC2/C3IN1-/C4IN1-/C5IN1-/C6IN1-/C7IN1-/C8IN1-/PWM7 — Bidirectional I/O / analog input / comparator input / PWM7 |
| 引脚 22 | RC3/ANC3/C1IN3-/C2IN3-/C3IN2-/C4IN2-/C5IN2-/C6IN2-/C7IN2-/C8IN2-/PWM8 — Bidirectional I/O / analog input / comparator input / PWM8 |
| 引脚 23 | RC4/ANC4/C3IN3-/C4IN3-/C5IN3-/C6IN3-/C7IN3-/C8IN3-/CCP2 — Bidirectional I/O / analog input / comparator input / CCP2 |
| 引脚 24 | RC5/ANC5/C3IN1+/C4IN1+/C5IN1+/C6IN1+/C7IN1+/C8IN1+/CCP1 — Bidirectional I/O / analog input / comparator positive / CCP1 |
| 引脚 25 | RC6/ANC6/C3IN2+/C4IN2+/C5IN2+/C6IN2+/C7IN2+/C8IN2+/CCP3/TX1/CK1 — Bidirectional I/O / analog input / comparator positive / CCP3 / UART1 TX |
| 引脚 26 | RC7/ANC7/C3IN0+/C4IN0+/C5IN0+/C6IN0+/C7IN0+/C8IN0+/RX1/DT1 — Bidirectional I/O / analog input / comparator positive / UART1 RX |
| 引脚 27 | VSS — Ground reference |
| 引脚 28 | VDD — Positive supply voltage (3.0V to 5.5V) |
典型应用
PIC18F25K40-E/SO 适用于 7 应用s: Industrial Sensor Conditioning Nodes, Low-Power IoT Endpoints, Appliance Control Panels, LED Lighting Controllers, Automotive Body Electronics, Consumer White Goods, Portable Medical Monitoring Devices.
Industrial Sensor Conditioning Nodes
The PIC18F25K40-E/SO suits industrial 4-20 mA sensor conditioning nodes where its 10-bit ADC2 with computation and 5-bit DAC enable local signal processing without external components. With 32 KB Flash and 2 KB SRAM, the MCU can run Modbus RTU stacks, sensor linearization, and self-calibration routines. The 3.0V-5.5V supply range integrates directly into 24V-bus-derived 5V rails. nanoWatt XLP sleep currents below 50 nA extend battery life in remote wireless sensor transmitters deployed in field instrumentation.
推荐
Low-Power IoT Endpoints
Battery-powered IoT endpoints benefit from the PIC18F25K40-E/SO's nanoWatt XLP technology, with deep-sleep currents below 50 nA enabling multi-year coin-cell operation. The integrated EUSART supports direct interfacing with LoRa, Sub-GHz, and Bluetooth Low Energy modules. The 10-bit ADC2 with hardware averaging and threshold compare can wake the CPU only when sensor values exceed programmed limits, drastically reducing average power consumption. The 256-byte EEPROM stores configuration and network credentials without battery backup.
推荐
Appliance Control Panels
The PIC18F25K40-E/SO drives washing machine, dishwasher, and oven user-interface panels where its 28-pin SOIC footprint provides ample I/O for keypad scanning, 7-segment or LCD display driving, and relay control. The Complementary Waveform Generator (CWG) simplifies inverter-style motor control and zero-cross TRIAC triggering without CPU load. With 32 KB Flash and 2 KB SRAM, the device runs state-machine-based UI firmware, fault detection, and serial diagnostics on a single 5V supply without auxiliary logic.
推荐
LED Lighting Controllers
The PIC18F25K40-E/SO is well-suited for digital-addressable LED lighting controllers (WS2812B, APA102) where its DMA-free CCP and CWG peripherals generate precise timing waveforms. The 10-bit ADC reads ambient light sensors for daylight harvesting, while the 5-bit DAC provides smooth dimming curves via PWM-filtered analog output. The 64 MHz core runs WS2812B bit-banging protocols at 800 kbps while servicing DMX512 or DALI input parsers, all within the 32 KB Flash envelope.
推荐
Automotive Body Electronics
Inside-cabin automotive body modules such as seat controllers, mirror adjusters, and HVAC blend-door actuators use the PIC18F25K40-E/SO for its 5V tolerance and -40 C to +125 C extended temperature range. The PIC18F K40 family is well-known for automotive applications, supporting LIN bus via the EUSART and direct MOSFET half-bridge driving through the CWG. The CRC/SCAN peripheral detects Flash corruption in safety-relevant functions, and the WWDT provides ASIL-A-grade system supervision.
推荐
Consumer White Goods
Refrigerators, microwave ovens, and coffee machines deploy the PIC18F25K40-E/SO as the main user-interface controller, taking advantage of its 5V tolerance to interface directly with triac-driving optocouplers and 7-segment LED displays. The 32 KB Flash stores multilingual UI strings, brewing profiles, and fault logs in the 256-byte EEPROM. The Core Independent Peripherals run capacitive touch sensing via the ADC2 with computation and hardware CVD, eliminating dedicated touch ICs in mid-range appliance designs.
推荐
Portable Medical Monitoring Devices
Battery-powered pulse oximeters, glucose meters, and portable ECG monitors leverage the PIC18F25K40-E/SO's nanoWatt XLP sleep modes and 10-bit ADC2 with computation to achieve weeks-long battery life. The DMA-free CCP modules generate precision timing for SpO2 LED drivers, while the CWG produces isolated transformer drive waveforms for the high-voltage stimulation circuits. Hardware CRC/SCAN validates Flash integrity for medical device firmware reliability, and the 256-byte EEPROM stores patient calibration data securely.
推荐
推荐产品汇总
工程参考数据： PIC18F25K40-E/SO ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18F25K40-I/SO | PIC18F25K40T-I/SO | PIC18F24K40-E/SO | PIC18F25K22-I/SO |
|---|---|---|---|---|---|
| Package | SOIC-28 | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Core | PIC18 (8-bit RISC) | PIC18 (8-bit RISC) | PIC18 (8-bit RISC) | PIC18 (8-bit RISC) | PIC18 (8-bit RISC) |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 1 KB | 1.5 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Max Clock Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 2.3V to 5.5V |
| Temperature Range | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) |
| Core Independent Peripherals | CWG, WWDT, CRC/SCAN, CLC | CWG, WWDT, CRC/SCAN, CLC | CWG, WWDT, CRC/SCAN, CLC | CWG, WWDT, CRC/SCAN, CLC | No CLC, older ECCP |
| Unit Price (1000+ qty) | $1.32 | $1.30 | $1.32 | $1.25 | $1.28 |
关键差异点
- Extended -40C to +125C temperature grade with same silicon die as industrial -I variant （对比 PIC18F25K40-I/SO)
- 16 KB less Flash than K40 but pin-compatible K40 family member （对比 PIC18F24K40-E/SO)
- Newer Core Independent Peripherals (CLC, CWG, CRC/SCAN) versus older K22 family （对比 PIC18F25K22-I/SO)
- Wider 3.0V-5.5V supply range with 5V tolerance on I/O （对比 PIC18F25K22-I/SO)
设计说明
The PIC18F25K40-E/SO supports nanoWatt XLP sleep modes with currents below 50 nA in deep sleep with RTCC enabled. For battery-powered designs, place a 100 nF ceramic decoupling capacitor within 3 mm of each VDD pin (pin 10 and pin 28), and a bulk 10 uF tantalum or ceramic capacitor near the supply input. The internal BOR and POR handle slow-rising supplies gracefully, but a 100 ohm series resistor with 1 uF bypass on MCLR pin 6 prevents in-circuit reset glitches during hot-plug events.
For SOIC-28 layouts, route all 28 signals on a single PCB layer if possible, with a continuous ground plane on the adjacent layer. Keep the ICSP lines (RB6/ICSPCLK pin 17 and RB7/ICSPDAT pin 18) accessible via a 2x3 0.1-inch header for production programming and debugging. Add test vias on the MCLR line (pin 6) for in-circuit reset. Estimated: SOIC-28 land pattern per IPC-7351 with 1.27 mm pitch requires approximately 10.3 x 7.5 mm pad area including thermal relief.
When using the 10-bit ADC2 with computation, place the analog reference capacitor (0.1 uF) directly on the VREF+ pin (RA3, pin 4) within 5 mm. Avoid routing digital switching signals (PWM, SPI CLK) parallel to analog inputs (RA0-RA7, RB0-RB5, RC0-RC7) on the same layer. Use a ground guard ring around sensitive analog traces, and keep the ADC acquisition time at minimum 1 us per the K40 datasheet AC characteristics for full 10-bit accuracy.
Do not exceed the absolute maximum ratings of 6.5V on VDD or expose any I/O pin beyond -0.3V to VDD+0.3V; the PIC18F25K40-E/SO is NOT 5V tolerant on digital I/O when VDD is below 5V. Always configure unused I/O pins as outputs with logic low to minimize current consumption, never leave them floating. For ICSP programming, ensure MCLR is pulled to VDD through a 10 kohm resistor during normal operation - if left floating, the device may enter unintended reset states.
Place the 16 MHz external crystal (if used) within 5 mm of pins 7 (OSC1/RA7) and 8 (OSC2/RA6), with a solid ground plane beneath it. Use 22-33 pF load capacitors per crystal manufacturer datasheet, referenced to the local analog ground island. Keep high-frequency signals (SPI, UART) away from the XTAL traces. Estimated: Total oscillator trace length should be kept under 10 mm to minimize parasitic capacitance and EMI susceptibility.
合规信息
RoHS compliant per Microchip product page. Industrial /E temperature grade does not require AEC-Q100; for AEC-Q100 qualified automotive variants consult Microchip's automotive-grade PIC18 portfolio.
