PIC18LF26K22-I/SO - 64KB Flash 8-bit MCU XLP 28-SOIC | Microchip
料号： PIC18LF26K22-I/SO ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.79 | $279.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.1 | $2,100.00 |
PIC18LF26K22-I/SO 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM/EEPROM) and a configurable set of peripherals - ADC, timers, communication interfaces and GPIO - on one piece of silicon. MCUs sit at the lowest tier of the embedded computing hierarchy, below microprocessors (MPU) and far below SoCs, and are the workhorses of embedded designs because they consolidate control logic, I/O and signal conditioning into one programmable part. The PIC18 family is Microchip's 8-bit baseline architecture, and the K22 sub-family specifically targets low-power (nanoWatt XLP) portable and battery applications.
Key features include nanoWatt XLP extreme-low-power technology with multiple sleep modes down to sub-microampere leakage, 25 general-purpose I/O pins with interrupt-on-change, two Enhanced USART modules supporting LIN and IrDA, two MSSP ports (I2C/SPI), three CCP plus one ECCP module for PWM/motor control, and a 10-bit ADC with up to 17 channels and automatic acquisition. The -LF voltage variant operates from 1.8V to 3.6V.
Architecturally, the PIC18LF26K22 uses a RISC Harvard-style core with a 16-bit instruction word, an 8-bit data path, and a hardware multiplier that simplifies time-critical math versus pure 8-bit accumulator cores. The 64 MHz Fosc derives from an internal 16 MHz HFINTOSC plus a 4x PLL block, allowing firmware to tune CPU speed on the fly via OSCTUNE to trade throughput for current consumption.
Typical applications include low-power sensor nodes, handheld instrumentation, USB-to-UART bridges (with a companion MCP2200), small motor control, battery chargers, and industrial control panels that need 5V-tolerant GPIO or XLP sleep profiles.
Design consideration: choose the -LF (1.8V-3.3V) variant rather than the -F (1.8V-5.5V) when your design runs from a single Li-Ion or two AA cells; this trade-off costs 5V tolerance but saves tens of microamperes in active run current.
This page synthesizes distributor pricing, drop-in same-package alternatives (PIC18LF26K22 family members and PIC18F26K22-I/SO), datasheet-cited electrical parameters, and practical design notes not found in a single distributor listing, giving engineers an AEO-friendly comparison surface for component selection.
直接替换替代料： PIC18LF26K22-I/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： PIC18LF26K22-I/SO （相同外形与封装尺寸） ——差异在于 Package, ADC, I/O Pins, Operating Temperature, Timers.
快速对比工具——选择替代料号进行并排对比：
PIC18F26K22-I/SO
✅ 直接替换✓ 有现货
$2.62 / 个
查看数据手册 →PIC18LF26K22T-I/SO
✅ 直接替换✓ 有现货
$2.55 / 个
查看数据手册 →PIC18LF26K22-E/SO
✅ 直接替换✓ 有现货
$1.96 / 个
查看数据手册 →PIC18LF26K22-I/SO 最大额定值与电气特性
| Product Type | 8-bit Microcontroller (MCU) |
| Series | PIC® XLP™ 18K (PIC18F/LF26K22) |
| Core Architecture | PIC18 RISC (Harvard) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| SRAM | 3,968 bytes |
| EEPROM | 1,024 bytes |
| Maximum CPU Frequency | 64 MHz (16 MIPS) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V (LF variant) |
| 工作温度 | -40 C to +85 C (Industrial, -I) |
| I/O Pins | 25 |
| ADC | 10-bit, up to 17 channels |
| DAC | Yes |
| Communication Interfaces | 2x EUSART (LIN/IrDA), 2x MSSP (I2C/SPI) |
| PWM Modules | 3x CCP + 1x ECCP |
| 封装 | 28-pin SOIC (SO) - 7.50 mm body width |
| 安装类型 | Surface Mount |
| Low-Power Technology | nanoWatt XLP |
| RoHS 状态 | Compliant |
PIC18LF26K22-I/SO 引脚配置
| 引脚 1 | MCLR/VPP — Master Clear (reset) input or programming voltage |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 引脚 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| 引脚 5 | RA3/AN3 — PORTA bit 3 / analog input 3 |
| 引脚 6 | RA4 — PORTA bit 4 |
| 引脚 7 | RA5/AN4 — PORTA bit 5 / analog input 4 |
| 引脚 8 | RE3 — PORTE bit 3 (MCLR alternate) |
| 引脚 9 | RE2 — PORTE bit 2 |
| 引脚 10 | RE1 — PORTE bit 1 |
| 引脚 11 | VDD — Positive supply voltage |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | RA7/OSC1 — PORTA bit 7 / oscillator input |
| 引脚 14 | RA6/OSC2 — PORTA bit 6 / oscillator output |
| 引脚 15 | RC0 — PORTC bit 0 |
| 引脚 16 | RC1 — PORTC bit 1 |
| 引脚 17 | RC2 — PORTC bit 2 |
| 引脚 18 | RC3 — PORTC bit 3 |
| 引脚 19 | RD0 — PORTD bit 0 |
| 引脚 20 | RD1 — PORTD bit 1 |
| 引脚 21 | RD2 — PORTD bit 2 |
| 引脚 22 | RD3 — PORTD bit 3 |
| 引脚 23 | RC4 — PORTC bit 4 |
| 引脚 24 | RC5 — PORTC bit 5 |
| 引脚 25 | RC6 — PORTC bit 6 |
| 引脚 26 | RC7 — PORTC bit 7 |
| 引脚 27 | RD4 — PORTD bit 4 |
| 引脚 28 | RD5 — PORTD bit 5 |
典型应用
PIC18LF26K22-I/SO 适用于 6 应用s: Battery-Powered Sensor Node, Handheld Instrumentation, USB-to-UART Bridge / CDC Device, Small Motor Control (BLDC / Stepper), Industrial Control Panels, Battery Chargers / Power Bank Controller.
Battery-Powered Sensor Node
The PIC18LF26K22-I/SO is well suited to low-power wireless sensor nodes such as LoRaWAN or BLE beacon peripherals. Its 1.8-3.6 V VDD range matches a single-cell Li-Ion or 2xAA alkaline pack directly, while nanoWatt XLP sleep modes draw sub-microampere current between transmissions. The 64 KB Flash accommodates a sensor fusion and over-the-air update bootloader, and the 10-bit ADC with 17 channels handles thermistor, photocell and battery-divider analog inputs simultaneously. Designers can wake the CPU via the RTCC interrupt for periodic sampling at intervals of several seconds, then return to sleep with the EUSART disabled to keep average current in the low-microampere range.
推荐
Handheld Instrumentation
For handheld multimeters, thermal cameras and portable diagnostic tools, the PIC18LF26K22-I/SO offers 64 KB of Flash for UI logic and measurement routines, 25 GPIO for keypad scanning and LCD drive, and 17 ADC channels for multi-range analog front-ends. The ECCP module provides configurable PWM for buzzer tones and backlight dimming. With CPU throughput up to 16 MIPS the device comfortably drives character or graphical LCDs while concurrently running measurement signal processing. The LF voltage variant also enables direct Li-Ion operation without an additional LDO, simplifying BOM cost in space-constrained enclosures.
推荐
USB-to-UART Bridge / CDC Device
Although the PIC18LF26K22-I/SO lacks native USB, it can serve as the MCU side of a USB-to-UART bridge when paired with an MCP2200 chip, handling protocol translation, buffering and command processing. The 3,968 bytes SRAM is sufficient for CDC packet buffering at 115,200 baud with simultaneous echo processing. EUSART ports can be configured as RS-232/RS-485 level-shifted interfaces for industrial protocols, while MSSP ports handle I2C peripherals. This architecture is widely used in legacy equipment upgrades where a 5V-tolerant interface is required and a full USB-capable MCU would be over-specified.
推荐
Small Motor Control (BLDC / Stepper)
For low-power BLDC fan control, small stepper drivers or DC-motor PWM loops, the PIC18LF26K22-I/SO provides three CCP plus one ECCP module - enough to generate complementary PWM with dead-band insertion for half-bridge FET drivers. The 16 MIPS throughput supports sensorless back-EMF zero-crossing algorithms for fans up to several watts. Hardware multiplier and 17-channel ADC handle current sensing and voltage feedback loops. Designers benefit from the LF voltage range when driving 3.3 V logic-level FETs directly, while the 25 GPIO can manage HALL sensors, FG tachometer output and fault indicators.
推荐
Industrial Control Panels
The PIC18LF26K22-I/SO is widely used in industrial control panels where 24V-tolerant or 5V-tolerant GPIO is required, replacing older PIC16 designs with more Flash and RAM. It supports Modbus RTU over EUSART and I2C sensor expansion via MSSP for panel-meter inputs, status LEDs and relay outputs. The industrial -40C to +85C temperature range covers most control-cabinet environments. With 64 KB Flash, designers can embed Modbus, CANopen slave firmware or proprietary industrial protocols without resorting to a 32-bit MCU.
推荐
Battery Chargers / Power Bank Controller
The PIC18LF26K22-I/SO serves as a charger controller in single-cell Li-Ion power banks, leveraging the 1.8-3.6 V VDD for direct cell monitoring without external level translation. The 10-bit ADC samples charge/discharge current, cell voltage and thermistor inputs, while ECCP PWM regulates the buck converter duty cycle. nanoWatt XLP sleep modes keep quiescent losses below 50 uA during standby, preserving cell capacity. Designers can implement CC-CV profiles, JEITA temperature fold-back and load detection entirely in firmware thanks to the 64 KB Flash and 16 MIPS throughput.
推荐
推荐产品汇总
工程参考数据： PIC18LF26K22-I/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 | PIC18F26K22-I/SO | PIC18LF26K22T-I/SO | PIC18LF26K22-E/SO |
|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC (drop-in) | 28-SOIC (drop-in) | 28-SOIC (drop-in) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 5.5 V (wider) | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V (same) |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB |
| SRAM | 3,968 bytes | 3,968 bytes | 3,968 bytes | 3,968 bytes |
| Max CPU Frequency | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (wider) |
关键差异点
- Lowest operating voltage in the K22 family （对比 PIC18F26K22-I/SO)
- Same die with tape-and-reel packaging （对比 PIC18LF26K22T-I/SO)
- Extended temperature grade available （对比 PIC18LF26K22-E/SO)
设计说明
Estimated: at Fosc = 64 MHz and VDD = 3.3 V, typical active current for PIC18LF26K22-I/SO is approximately 8-10 mA. To preserve battery life in sensor nodes, drop to the internal 16 MHz HFINTOSC and disable peripherals via PMD registers before entering Sleep. Sleep current with RTCC active is in the sub-microampere range per the datasheet, enabling multi-year battery life on duty-cycled applications.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 11) and a 10 uF bulk capacitor on the same supply trace. For ADC accuracy, add a small ferrite bead or 10 ohm resistor on AVDD if the digital and analog sections share a noisy rail. The 28-SOIC package has adequate thermal dissipation for typical embedded workloads without copper-pour heatsinking.
Do not exceed the absolute maximum VDD of 3.6 V on the LF variant - this will permanently damage the part. If your design may receive 5 V on any GPIO, choose the PIC18F26K22 (1.8-5.5 V) variant instead. Always configure the MCLR pin with a 10 kohm pull-up to VDD and a 100 nF cap to ground for in-circuit serial programming (ICSP) reliability. Unused pins should be configured as outputs low or inputs with the internal weak pull-up enabled to minimize current leakage.
合规信息
RoHS compliant per Microchip product page. Industrial -I temperature grade -40C to +85C; for automotive AEC-Q100 needs use the PIC18LF26K22-I/SSVAO or PIC18LF26K22-E/SO variants.
