PIC18LF25K42-I/SS - 8-bit 64MHz 32KB Flash MCU | Microchip
Артикул: PIC18LF25K42-I/SS ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.56 | $25,60 |
| 100 | $2.21 | $221,00 |
| 500 | $1.95 | $975,00 |
| 1.000 | $1.72 | $1.720,00 |
| 3.000 | $1.55 | $4.650,00 |
PIC18LF25K42-I/SS Обзор
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path that executes one instruction per clock cycle (or per a small number of cycles). PIC18 microcontrollers sit within Microchip's 8-bit product hierarchy: 8-bit MCU → PIC family → PIC18 sub-family → PIC18F/K42 series → specific die. They are widely used in cost-sensitive, low-power embedded applications such as consumer electronics, IoT sensor nodes, home appliances, and motor control where deterministic interrupt latency, peripheral integration, and ultra-low sleep current outweigh raw computational throughput.
Key features of the PIC18LF25K42 include up to 64 MHz CPU clock (16 MIPS performance), 12-bit ADC with Computation supporting up to 38 channels, multiple communication peripherals (UART, SPI, I2C), 10-bit DAC, 10 timers, 2 DMA channels, and eXtreme Low Power (XLP) technology with down to nanoWatt sleep currents. Functional Safety (FuSa) capability is included on the F-variant (PIC18F25K42) but the LF variant is targeted at low-power standard applications. The 28-SSOP package provides a compact 0.65 mm pitch surface-mount form factor with 25 usable I/O pins.
Architecturally, the PIC18LF25K42 employs an enhanced Harvard architecture with separate program and data buses, allowing simultaneous instruction fetch and operand access. The CWG (Complementary Waveform Generator), NCO (Numerically Controlled Oscillator), and DSM (Data Signal Modulator) peripherals enable sophisticated signal generation with zero CPU intervention, while ADC2 automates touch sensing through hardware-accelerated averaging, oversampling, and threshold detection.
Typical applications include battery-powered IoT sensor nodes, consumer electronics with touch-button interfaces, low-energy motor control, home automation, and industrial sensor hubs. The wide operating voltage range (1.8V–3.6V) supports direct connection to Li-ion, 2xAA, or 3.3V regulated rails without external level shifters.
When designing with this MCU, ensure the HFINTOSC is calibrated at the chosen frequency to maintain timing accuracy over temperature, and use the DMA controller to offload ADC-to-memory transfers for ultra-low-power operation. Decoupling of VDD/VSS pairs with 100 nF ceramic capacitors placed within 5 mm of the pins is mandatory for ADC accuracy.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Аналоги без доработки для PIC18LF25K42-I/SS — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC18LF25K42-I/SS (тот же форм-фактор и посадочное место) — отличается по ADC, Package, Core Architecture, Operating Temperature, DAC.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC18F25K42-I/SS
✅ Прямая замена✓ В наличии
$1.78 / шт.
Открыть даташит →PIC18LF24K42-I/SS
✅ Прямая замена✓ В наличии
$1.81 / шт.
Открыть даташит →PIC18LF25K42-I/SO
✅ Прямая замена✓ В наличии
$1.62 / шт.
Открыть даташит →PIC18LF25K42-I/SS Максимальные параметры и электрические характеристики
| Core Architecture | PIC18 (8-bit RISC, enhanced Harvard) |
| CPU Core | PIC18 |
| Maximum CPU Clock | 64 MHz |
| Performance | 16 MIPS |
| Program Memory (Flash) | 32 KB |
| Data Memory (SRAM) | 2 KB |
| Data EEPROM | 256 B |
| Operating Voltage Range | 1.8 V to 3.6 V (LF variant) |
| General-Purpose I/O Pins | 25 |
| ADC | 12-bit with Computation (ADC2), up to 38 channels |
| DAC | 10-bit, 1 channel |
| Timers | 10 |
| DMA Channels | 2 |
| Communication Peripherals | UART, SPI, I2C |
| Touch Sensing | mTouch CVD via ADC2 |
| XLP Technology | Yes (eXtreme Low Power, nanoWatt sleep) |
| Корпус | 28-pin SSOP (5.30 mm body, 0.65 mm pitch) |
| Тип монтажа | Surface Mount |
| Диапазон рабочих температур | -40 C to +85 C (industrial, 'I') |
| Статус RoHS | Compliant |
Руководство по цоколевке PIC18LF25K42-I/SS в корпусе 28-pin ssop (5.30 mm body, 0.65 mm pitch)
Цоколевка для PIC18LF25K42-I/SS (корпус 28-pin ssop (5.30 mm body, 0.65 mm pitch)). Эта цифровая ИС включает выводы GPIO, интерфейсы связи (UART, SPI, I2C) и выводы питания. Обратитесь к техническому описанию производителя для альтернативных функций выводов и вариантов конфигурации. Необходимо для проектирования встраиваемых систем и трассировки печатных плат.
Нет подробных данных о распиновке для PIC18LF25K42-I/SS.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
PIC18LF25K42-I/SS подходит для 6 применениеs: Battery-Powered IoT Sensor Nodes, Touch-Button Consumer Electronics, Low-Energy Motor Control (BLDC / Stepper), Home Automation and Smart Home Hubs, Industrial Sensor Hubs and Field Transmitters, Medical and Health Monitoring Wearables.
Battery-Powered IoT Sensor Nodes
The PIC18LF25K42-I/SS fits battery-powered IoT sensor nodes where the 1.8V minimum VDD allows direct connection to single-cell Li-ion or 2xAA chemistries without boost converters, extending battery life by 15–25%. Its XLP nanoWatt sleep mode drops quiescent current below 100 nA with RTC running, while the 12-bit ADC2 with hardware averaging and 2 DMA channels enables autonomous sensor acquisition without waking the CPU. The 64 MHz CPU wakes in microseconds to process and transmit via UART/SPI/I2C, making it ideal for sub-1 GHz radios, BLE co-processor interfaces, and LoRa SX1276 modules in environmental monitoring, smart agriculture, and asset tracking.
Рекомендуется
Touch-Button Consumer Electronics
The PIC18LF25K42-I/SS drives mTouch capacitive touch buttons via the 12-bit ADC2 with Computation (CVD) module, supporting up to 38 touch channels without external components beyond the sensor pads. Hardware-accelerated averaging, oversampling, and threshold comparison eliminate the CPU overhead of polling, reducing active power by up to 70% versus firmware-only touch libraries. With 32 KB Flash and 2 KB SRAM, designers can implement capacitive sliders, proximity sensing, and water-tolerant touch panels for kitchen appliances, smart speakers, and remote controls. The 28-SSOP package supports compact PCB layouts where mechanical buttons would compromise the IP67 sealing of the enclosure.
Рекомендуется
Low-Energy Motor Control (BLDC / Stepper)
The PIC18LF25K42-I/SS delivers compact BLDC and stepper motor control thanks to its 10 timers, complementary waveform generator (CWG), PWM modules, and quadrature encoder interface (QEI). At 64 MHz the CPU generates field-oriented control (FOC) loops with sub-millisecond latency while staying under 5 mA active current. The 1.8V–3.6V range suits cordless power tools, drone ESCs, and small appliances that operate from 1S Li-ion packs. Two DMA channels move encoder and ADC samples autonomously, freeing the CPU to execute the FOC algorithm. Its 32 KB Flash accommodates sensored or sensorless BLDC firmware plus diagnostic UDS stacks for industrial pumps and fans.
Рекомендуется
Home Automation and Smart Home Hubs
The PIC18LF25K42-I/SS powers home automation hubs, smart thermostats, and lighting controllers where its 32 KB Flash fits small TCP/IP or Matter-over-Thread stacks alongside application logic. The 25 GPIOs handle multiple sensor inputs (temperature, humidity, PIR, light), keypad matrices, and segment/character LCDs via the LCD driver peripheral. Low-power XLP mode keeps the device in deep sleep below 100 nA between sensor polls, waking via timer or interrupt. Its 1.8V minimum supports 3.3V regulated rails common in wall-powered smart switches and battery-powered BLE beacons, with UART/SPI/I2C interfaces connecting to radios, sensors, and EEPROM expansion.
Рекомендуется
Industrial Sensor Hubs and Field Transmitters
The PIC18LF25K42-I/SS serves as the core of industrial 4-20 mA loop-powered sensor transmitters and Modbus field units. Its 12-bit ADC2 with hardware averaging provides better than 0.1% measurement resolution for pressure, flow, and level sensors. The 1.8V–3.6V range accommodates loop-powered designs where 4 mA loop current at 24V produces only ~3.3V after the shunt regulator. Two UARTs implement RS-485 Modbus RTU plus debug console, while DMA offloads ADC-to-memory transfers at 100 kS/s. The 28-SSOP package is compatible with conformal coating processes for harsh-environment field transmitters in process automation.
Рекомендуется
Medical and Health Monitoring Wearables
The PIC18LF25K42-I/SS powers wearable medical devices including fitness bands, pulse oximeter front-ends, and continuous glucose monitor (CGM) transmitters where 1.8V operation directly connects to small Li-Po cells. Its ADC2 supports biopotential signal acquisition (ECG/EMG) with hardware filtering, while DMA channels manage continuous sensor sampling at rates up to 100 kS/s without CPU intervention. XLP nanoWatt sleep keeps idle current under 100 nA, critical for multi-day battery life in CGM patches and wearable ECG monitors. The 32 KB Flash supports BLE firmware stacks for wearables plus on-device signal processing, reducing RF duty cycle and overall system power.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC18LF25K42-I/SS — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC18F25K42-I/SS | PIC18LF24K42-I/SS | PIC18LF25K42-I/SO |
|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP (same) | 28-SSOP (same) | 28-SOIC (different body, same die) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Operating Voltage | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Flash Memory | 32 KB | 32 KB | 16 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| ADC | 12-bit ADC2 with CVD | 12-bit ADC2 with CVD | 12-bit ADC2 with CVD | 12-bit ADC2 with CVD |
| Functional Safety (FuSa) | No (LF variant) | Yes | No | No |
| I/O Pins | 25 | 25 | 25 | 25 |
Ключевые отличия
- 1.8V minimum VDD versus 2.3V for F variant (против PIC18F25K42-I/SS)
- 32 KB Flash vs 16 KB on PIC18LF24K42 (против PIC18LF24K42-I/SS)
- 28-SSOP narrow body for compact designs (против PIC18LF25K42-I/SO)
Заметки по проектированию
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD/VSS pair (VDD, VDDIO, AVDD, AVSS) to ensure ADC2 accuracy and stable core operation. For battery-powered designs, place a 10 µF bulk capacitor on the VDD rail to suppress load transients when the radio wakes. The XLP sleep mode requires the RTC to be clocked from the 32.768 kHz external crystal (SOSC) for nanoWatt operation; using LFINTOSC keeps current ~5 µA instead of <100 nA.
For ADC2 measurement accuracy, route analog traces away from switching signals (PWM, digital communication lines) and use a separate analog ground plane tied to a single point to the digital ground at the AVSS pin. Keep the analog reference pin (VREF+/VREF-) traces short and shielded by ground pour. The 28-SSOP pin pitch of 0.65 mm requires 4-layer PCB routing for complex designs; 2-layer boards may require via-in-pad microvia technology.
Do not exceed 3.6V on any pin — the LF variant is not 5V-tolerant. Use level shifters when interfacing 5V sensors or radios. The HFINTOSC drift over temperature can be ±2% without calibration; for UART communication above 115200 baud or for timer-accurate applications, use the 16 MHz HFINTOSC with the OSCTUNE register or an external crystal. Programming/debug with ICD requires the PGC/PGD pins to be reserved and not assigned to user I/O via config fuses.
Route the ICSPDAT/ICSPCLK (PGD/PGC) traces with parallel ground traces to reduce EMI susceptibility. For capacitive touch sensing with ADC2, route sensor traces with minimum 0.5 mm width on a layer that has ground pour below; avoid via stitching to maintain stable capacitance. Place guard traces (ground) around touch sensors to prevent false triggers from adjacent high-impedance traces.
Информация о соответствии
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - choose automotive-grade PIC18F variants for vehicle applications. Industrial temperature range -40C to +85C (I suffix).
