PIC18LF25K22T-I/SS - 32KB Flash 8-bit MCU 64MHz SSOP-28 | Microchip
料号： PIC18LF25K22T-I/SS ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.13 | $213.00 |
| 500 | $1.89 | $945.00 |
| 1,000 | $1.66 | $1,660.00 |
PIC18LF25K22T-I/SS 概述
A microcontroller (MCU) is a single-chip computer containing a CPU, memory (Flash/RAM/EEPROM), and programmable I/O peripherals. The PIC18 family uses a modified Harvard architecture with a RISC instruction set optimised for deterministic interrupt response and low-power embedded control, sitting within Microchip's broader 8-bit product hierarchy (PIC10/12/16/18) which in turn competes with 32-bit Cortex-M0 devices for low-cost IoT nodes.
Key features of the PIC18LF25K22T-I/SS include an operating voltage range of 1.8 V to 3.6 V (the 'LF' variant), nanoWatt XLP sleep current under 1 µA typical, two EUSART, two MSSP, two comparators, seven PWM channels, a 12-channel 10-bit ADC, and CTMU for capacitive touch sensing. The 'T' suffix indicates Tape & Reel packaging, 'SSOP' specifies the 28-pin (0.209 in / 5.30 mm width) Shrink Small Outline Package, and 'I' denotes the industrial -40 °C to +85 °C temperature range.
Architecturally, the device pairs a C-compiler-friendly PIC18 core with hardware multipliers and a 16-bit instruction path, allowing efficient C code generation while retaining the deterministic latency of the PIC family. CTMU, mTouch and EEPROM make it well suited to mixed-signal and human-interface designs that also demand low standby power.
Typical applications include low-power IoT sensor nodes, battery-powered remote controls, capacitive-touch user interface panels, home-automation peripherals, USB/CDC serial bridges, motor control for small DC fans and BLDCs, industrial sensor conditioning, and medical handhelds. With its 1.8 V minimum Vdd the LF variant is a direct fit for two AA / coin-cell powered designs where the standard F variant's 2.0 V minimum would be marginal.
When designing with this part, verify that code compiled for the F variant does not assume the higher Vdd minimum - relocating the LF Vdd range to 1.8 V instead of 2.0 V. Decouple Vdd/Vss with 100 nF plus 10 µF bulk within 5 mm of the pins, and respect the 28-pin SSOP 0.65 mm pitch for PCB land pattern accuracy.
This page synthesises distributor pricing, drop-in alternatives and practical design notes not found in any single Microchip document, with cross-references to PIC18F, PIC18LF, PIC18J and PIC18K sister parts in the same SSOP-28 footprint.
直接替换替代料： PIC18LF25K22T-I/SS ——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： PIC18LF25K22T-I/SS （相同外形与封装尺寸） ——差异在于 ADC, Package, I/O Pins, Core Architecture, Timers.
快速对比工具——选择替代料号进行并排对比：
PIC18F25K22T-I/SS
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF25K22-I/SS
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF25K22-E/SS
✅ 直接替换✓ 有现货
$2.24 / 个
查看数据手册 →PIC18LF23K22T-I/SS
✅ 直接替换✓ 有现货
$1.42 / 个
查看数据手册 →PIC18LF24K22T-I/SS
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF25K50T-I/SS
✅ 直接替换✓ 有现货
$1.85 / 个
查看数据手册 →PIC18LF25K22T-I/SS 最大额定值与电气特性
| Core Architecture | 8-bit PIC18 (modified Harvard, RISC) |
| Series | PIC XLP 18K |
| Flash Program Memory | 32 KB (16K x 16 words) |
| RAM | 1536 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 64 MHz (64 MIPS) |
| Operating Voltage (Vdd) | 1.8 V to 3.6 V |
| I/O Pins | 25 |
| ADC | 12-channel, 10-bit |
| Comparators | 2 |
| EUSART | 2 |
| MSSP (SPI / I2C) | 2 |
| PWM Channels | 7 |
| Timers (8-bit / 16-bit) | 3 x 8-bit, 4 x 16-bit |
| CTMU (mTouch) | Yes |
| nanoWatt XLP Sleep Current | < 50 nA typical (per family datasheet) |
| 封装 | 28-pin SSOP (0.209 in / 5.30 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40 °C to +85 °C (Industrial) |
| Lead-Free / RoHS | Lead-Free, RoHS Compliant |
PIC18LF25K22T-I/SS 引脚配置
| 引脚 1 | RA3/AN3/VREF+/C1IN+/C2IN+/MCLR — GPIO RA3 / ADC ch3 / Vref+ / Comparator1 in+ / Comparator2 in+ / Master Clear (reset, active-low input) |
| 引脚 2 | RA0/AN0/C1IN-/C2IN-/ULPWU — GPIO RA0 / ADC ch0 / Comparator1 in- / Comparator2 in- / Ultra-Low-Power Wake-up |
| 引脚 3 | RA1/AN1/C1INC/C2INC — GPIO RA1 / ADC ch1 / Comparator1 in C / Comparator2 in C |
| 引脚 4 | RA2/AN2/VREF-/C2IN+/CVREF — GPIO RA2 / ADC ch2 / Vref- / Comparator2 in+ / Comparator Vref output |
| 引脚 5 | VDD — Positive supply voltage (1.8 V to 3.6 V for LF variant) |
| 引脚 6 | VSS — Ground reference |
| 引脚 7 | RA5/AN4/SS1/CTMUI/C2OUT — GPIO RA5 / ADC ch4 / SPI1 SS / CTMU current injection / Comparator2 output |
| 引脚 8 | RA4/T0CKI/C1OUT — GPIO RA4 / Timer0 clock in / Comparator1 output |
| 引脚 9 | RB7/CTED1/KBI3/PGD — GPIO RB7 / CTMU edge1 / KBI3 / ICSP Data (PGD) |
| 引脚 10 | RB6/CTED2/KBI2/PGC — GPIO RB6 / CTMU edge2 / KBI2 / ICSP Clock (PGC) |
| 引脚 11 | RB5/KBI1/CCP5 — GPIO RB5 / KBI1 / CCP5 PWM |
| 引脚 12 | RB4/KBI0/AN12 — GPIO RB4 / KBI0 / ADC ch12 |
| 引脚 13 | RB3/AN9/CTED3/CCP2 — GPIO RB3 / ADC ch9 / CTMU edge3 / CCP2 PWM |
| 引脚 14 | RB2/AN8/CTED4/P1B — GPIO RB2 / ADC ch8 / CTMU edge4 / PWM1 complementary output |
| 引脚 15 | RB1/AN10/C1IN3-/P1C — GPIO RB1 / ADC ch10 / Comparator1 in3- / PWM1 channel C |
| 引脚 16 | RB0/AN12/FLT0/CCP4 — GPIO RB0 / ADC ch12 / PWM fault input / CCP4 PWM |
| 引脚 17 | RC7/AN11/KBI4/RX2/DT2 — GPIO RC7 / ADC ch11 / KBI4 / EUSART2 RX |
| 引脚 18 | RC6/AN8/KBI3/TX2/CK2 — GPIO RC6 / ADC ch8 / KBI3 / EUSART2 TX |
| 引脚 19 | RC5/AN17/SDO2 — GPIO RC5 / ADC ch17 / SPI2 SDO |
| 引脚 20 | RC4/AN16/SDI2/SDA2 — GPIO RC4 / ADC ch16 / SPI2 SDI / I2C2 SDA |
| 引脚 21 | RC3/AN15/SCK2/SCL2 — GPIO RC3 / ADC ch15 / SPI2 SCK / I2C2 SCL |
| 引脚 22 | RC2/AN14/CCP1/P1A — GPIO RC2 / ADC ch14 / CCP1 PWM / PWM1 channel A |
| 引脚 23 | RC1/AN13/CCP2 — GPIO RC1 / ADC ch13 / CCP2 PWM |
| 引脚 24 | RC0/AN16/T1OSO/T1CKI — GPIO RC0 / ADC ch16 / Timer1 oscillator output / Timer1 clock in |
| 引脚 25 | OSC2/CLKO/RA6 — Crystal oscillator output / Clock out / GPIO RA6 |
| 引脚 26 | OSC1/CLKI/RA7 — Crystal oscillator input / Clock in / GPIO RA7 |
| 引脚 27 | VSS — Ground reference |
| 引脚 28 | VDD — Positive supply voltage (1.8 V to 3.6 V for LF variant) |
典型应用
PIC18LF25K22T-I/SS 适用于 7 应用s: Battery-Powered IoT Sensor Node, Capacitive-Touch User Interface Panel, USB-to-UART CDC Bridge, Small DC Fan / BLDC Motor Controller, Industrial Sensor Conditioning Module, Medical Handheld / Portable Monitor, Home-Automation Peripherals (Zigbee/BLE/Sub-GHz End Node).
Battery-Powered IoT Sensor Node
The PIC18LF25K22T-I/SS nanoWatt XLP sleep current under 50 nA typical and 1.8 V minimum Vdd make it a strong fit for two-AA / coin-cell IoT sensor nodes that wake periodically, sample, transmit, and return to sleep. Its 64 MIPS core processes a sensor reading plus AES/CBC MAC and returns to sleep within milliseconds, while the 32 KB Flash hosts protocol stacks (LoRaWAN class A, BLE beacon, Zigbee). Placed between the battery and the sensor load with a low-Iq LDO on AVDD, the part adds negligible quiescent draw and supports years of operation on a single CR2032 when duty-cycled below 1%. Unlike Cortex-M0+ alternatives it requires no external debug adapter beyond an ICSP header and four pins.
推荐
Capacitive-Touch User Interface Panel
The PIC18LF25K22T-I/SS integrates CTMU and mTouch firmware for up to 16 capacitive-touch channels, sufficient for an 8-key plus 4-slider appliance front panel. The 64 MIPS throughput runs debounce, gesture recognition and LED feedback PWM at 1 kHz without DSP cores, while 1536 bytes RAM holds slider state and gesture history. With XLP sleep under 50 nA the panel idle power is dominated by LED standby; the part's 1.8-3.6 V Vdd accepts 2-AA or wall-adapter 5 V post-LDO rails. Unlike dedicated touch ICs, the MCU also drives the display and main appliance state machine.
推荐
USB-to-UART CDC Bridge
For designs that need USB but where the PIC18LF25K22T-I/SS is the host, an external USB-to-UART bridge is typical; for designs requiring on-chip USB, the SSOP-28-footprint-compatible PIC18LF25K50T-I/SS is the recommended migration within the same package. The LF25K22T acts as the application MCU while a CP2102N or MCP2221A handles USB enumeration, transparently appearing as a COM port. With 32 KB Flash and 1536 B RAM the LF25K22T easily runs command parsers, sensor reads and PWM drivers in parallel to UART traffic. Unlike native USB solutions, this split architecture separates USB firmware updates from application firmware.
推荐
Small DC Fan / BLDC Motor Controller
The PIC18LF25K22T-I/SS seven PWM channels, two comparators and 64 MHz core handle sensored BLDC commutation for small 12 V fans under 50 W. Its 25 I/O drive Hall sensors, back-EMF amplifier comparators and gate-driver enable lines without external logic, and 32 KB Flash fits speed PI controller plus fault handling. The 1.8-3.6 V Vdd accepts a 3.3 V digital supply post buck converter; for 5 V or 12 V fan rails the part sits on the low-voltage logic side. Unlike dedicated motor-control MCUs it lacks programmable dead-time, so external hardware is required for high-side/low-side shoot-through protection.
推荐
Industrial Sensor Conditioning Module
The PIC18LF25K22T-I/SS 12-channel 10-bit ADC, two comparators and CTMU suit 4-20 mA / 0-10 V industrial sensor front-ends with on-board linearisation and HART-like modulation. The 32 KB Flash hosts look-up tables for thermocouple and RTD linearisation, and the EUSART links to RS-485 transceivers for fieldbus. Operating from 1.8-3.6 V the part accepts 3.3 V digital rails with industrial-grade -40 to +85 °C tolerance per the 'I' suffix. Unlike higher-pin-count PIC18F variants it leaves plenty of headroom in the SSOP-28 for cost-sensitive 8-channel sensor cards.
推荐
Medical Handheld / Portable Monitor
The PIC18LF25K22T-I/SS low-power XLP core fit battery-powered medical peripherals such as portable pulse-oximeter front-ends, Bluetooth-enabled thermometers and pill-bottle reminders. Its 1.8-3.6 V Vdd and under-50-nA sleep extend CR2032 coin-cell life over multi-year horizons, while 32 KB Flash runs BLE stack shims and sensor algorithms. The 25 I/O drive LCDs, keypads and AFE chips, and CTMU enables touch-key user interfaces. Unlike Cortex-M0+ alternatives the part's deterministic PIC18 interrupt latency simplifies IEC 62304 software-class safety cases for Class A accessories.
推荐
Home-Automation Peripherals (Zigbee/BLE/Sub-GHz End Node)
The PIC18LF25K22T-I/SS is a strong fit for end-node home-automation peripherals - door/window sensors, leak detectors, occupancy sensors - that pair a 2.4 GHz or sub-GHz radio module and rely on coin-cell life. The 1.8 V minimum Vdd tolerates battery droop, while XLP sleep under 50 nA plus a wake-on-change interrupt makes periodic reporting feasible for years. The 32 KB Flash hosts small protocol shims and over-the-air update bootloaders, and 25 I/O drive RGB LEDs, push-buttons and reed switches. Unlike single-radio SoCs the part's separation of MCU and radio simplifies regulatory certification.
推荐
推荐产品汇总
工程参考数据： PIC18LF25K22T-I/SS ——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 | PIC18F25K22T-I/SS | PIC18LF25K22-I/SS | PIC18LF25K22-E/SS | PIC18LF23K22T-I/SS | PIC18LF24K22T-I/SS | PIC18LF25K50T-I/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP |
| Operating Voltage | 1.8 V to 3.6 V | 2.0 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 16 KB | 32 KB |
| RAM | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes | 512 bytes | 768 bytes | 1536 bytes |
| Maximum Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| USB Peripheral | No | No | No | No | No | No | Yes (USB 2.0 Full-Speed) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C |
关键差异点
- Lowest Vdd minimum of any PIC18 K22 SSOP-28 variant （对比 PIC18F25K22T-I/SS)
- Adds USB 2.0 Full-Speed without changing footprint （对比 PIC18LF25K50T-I/SS)
- Industrial -40 to +85C with nanoWatt XLP sleep under 50 nA （对比 PIC18LF23K22T-I/SS)
设计说明
Estimated: at Vdd=3.3 V the PIC18LF25K22T-I/SS draws about 9 mA active at 64 MHz and under 50 nA in XLP sleep per the family datasheet. For battery designs, gate peripherals and ADC usage behind the device's PMD (Peripheral Module Disable) registers and use Sleep-with-RTCC for sub-1 µA standby. Place a 100 nF ceramic + 10 µF bulk decoupling within 5 mm of pins 5 and 28. For sub-2.0 V Vdd, choose the LF variant explicitly - the F variant will brown out.
The 28-SSOP has a 0.65 mm pitch; per IPC-7351 use a 0.30 mm wide land with 0.45 mm mask expansion and route 0.15 mm signal traces. Keep ICSP pins (RB6/PGC, RB7/PGD, MCLR) accessible with test-point pads so MPLAB Snap / PICkit 4 can attach without fly-wire rework. Expose the OSC1/OSC2 pair (pins 25/26) for crystal or resonator; if using internal HFINTOSC tie OSC1 to GND and leave OSC2 floating.
Do not migrate PIC18F25K22 firmware to the LF variant without re-validating any code path that assumes Vdd >= 2.0 V (LF minimum is 1.8 V - usually safe - but the BOR and ADC reference voltage thresholds change). When using CTMU for capacitive touch, calibrate the current source with the family's CTMU calibration procedure documented in the datasheet; uncalibrated CTMU reads can drift over temperature. Ensure MCLR is pulled high through a 10 kΩ resistor for normal operation; a floating MCLR will spuriously reset the part.
合规信息
RoHS and lead-free per Microchip product page. AEC-Q100 not applicable - automotive designs should choose the PIC18F25K22T-I/SO or PIC18F46K22T-I/MR automotive grade; the SSOP-28 LF25K22T is industrial grade only.
