PIC18LF45K22-E/ML - 8-bit 48MHz 32KB Flash MCU | Microchip
N.º de pieza: PIC18LF45K22-E/ML ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $5.4 | $5,40 |
| 10 | $4.86 | $48,60 |
| 100 | $4.05 | $405,00 |
| 500 | $3.65 | $1.825,00 |
| 1.000 | $3.38 | $3.380,00 |
PIC18LF45K22-E/ML Descripción general
An 8-bit microcontroller (MCU) is a single-chip computer that integrates an 8-bit CPU core, Flash program memory, RAM, EEPROM, and a rich set of digital and analog peripherals into one package. MCUs sit at the top of the embedded device hierarchy: they are descendants of microprocessors that have absorbed nearly every supporting component, becoming self-contained 'system on chip' building blocks for embedded products. The PIC18LF45K22 belongs to the PIC18 family, which targets low-power and high-pin-count applications.
Key features include nanoWatt XLP sleep currents below 100 nA, two Enhanced USART modules for simultaneous serial communication, two MSSP peripherals supporting both I2C and SPI, a 12-bit A/D converter with up to 28 channels, multiple 16-bit timers, and CTMU charge-time measurement for capacitive touch. The device also integrates a 64 MHz internal oscillator, programmable reference and comparator modules, and self-programming Flash for bootloader designs.
Typical applications include low-power battery sensors, USB-less human-interface panels, HVAC controls, industrial data loggers, and capacitive-touch front panels where the CTMU simplifies the touch firmware. Designers also use it in portable medical accessories, e-metering, and home appliances.
When designing with the PIC18LF45K22-E/ML, place the VDD/VSS bulk and bypass capacitors within 5 mm of the pins and reserve the exposed pad (EP) for thermal and ground connection. Verify your compiler is MPLAB XC8-aware and that your programmer supports ICSP on the four-pin PGx/PGC/PGD/MCLR interface.
This page consolidates distributor pricing, parameter-matched drop-in alternatives, and practical design notes for the PIC18LF45K22-E/ML that go beyond what is in the Microchip datasheet. All cross-references, current pricing, and lifecycle signals were re-verified on 2026-09-29.
Alternativas directas para PIC18LF45K22-E/ML — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC18LF45K22-E/ML (mismo factor de forma y huella) — difiere en Package, ADC, Program Memory (Flash), Timers, Core.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18LF46K22-E/ML
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18F45K22-E/ML
✅ Sustitución directa✓ En stock
$1.78 / unidad
Ver hoja de datos →PIC18LF45K22-I/ML
✅ Sustitución directa✓ En stock
$2.28 / unidad
Ver hoja de datos →PIC18F46K22-E/ML
✅ Sustitución directa✓ En stock
$3.2 / unidad
Ver hoja de datos →PIC18LF45K40-E/ML
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18LF44K22-E/PT
✅ Sustitución directa✓ En stock
$1.7 / unidad
Ver hoja de datos →PIC18LF45K22-E/ML Valores máximos y características eléctricas
| Product Family | PIC18F/LF K22 series |
| Core | 8-bit PIC18 RISC |
| Maximum CPU Frequency | 48 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 1.5 KB (1536 bytes) |
| Data EEPROM | 256 bytes |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| Temperatura de funcionamiento | -40C to +125C (E = extended) |
| Encapsulado | 44-lead QFN (ML) 8x8 mm with EP |
| ADC | 12-bit, multi-channel |
| Communication | 2x EUSART (UART), 2x MSSP (I2C/SPI) |
| Timers | Multiple 8/16-bit timers |
| Low-Power Technology | nanoWatt XLP |
| Special Features | CTMU, internal oscillator, self-programming Flash |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
Guía de configuración de pines de PIC18LF45K22-E/ML 44-lead qfn (ml) 8x8 mm with ep
Configuración de pines para PIC18LF45K22-E/ML (encapsulado 44-lead qfn (ml) 8x8 mm with ep). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para PIC18LF45K22-E/ML.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
PIC18LF45K22-E/ML es adecuado para 6 aplicacións: Battery-Powered Wireless Sensor Nodes, Industrial HVAC and Building Controls, Capacitive-Touch Front Panels, Portable Medical Accessories, Electronic Metering and Data Loggers, Home Appliance User Interface Boards.
Battery-Powered Wireless Sensor Nodes
The PIC18LF45K22-E/ML is well suited to battery-powered wireless sensor nodes because its nanoWatt XLP sleep currents drop below 100 nA and its 1.8 V to 3.6 V wide-voltage core lets it run directly from a single Li-ion cell down to cutoff. With 32 KB of Flash and 1.5 KB of RAM, it can host a small protocol stack and a sensor driver without external memory. Place the part in sleep between measurements and wake on an MSSP-interrupt or RTCC alarm to extend battery life from months to years.
Recomendado
Industrial HVAC and Building Controls
The PIC18LF45K22-E/ML fits HVAC and building-automation controls because its 12-bit ADC delivers accurate temperature and pressure readings, the extended -40C to +125C grade survives mechanical-room environments, and the dual EUSART plus dual MSSP support simultaneous Modbus and sensor-bus traffic. The 44-pin QFN package keeps the PCB small enough for wall-mount thermostats and the K22 peripheral set includes the PWM module needed for triac-fired heater control.
Recomendado
Capacitive-Touch Front Panels
The PIC18LF45K22-E/ML simplifies capacitive-touch front-panel designs because the integrated CTMU (Charge-Time Measurement Unit) measures capacitance directly, removing the need for an external touch controller. With up to 28 ADC channels and 36+ I/O pins, a single chip can scan a 4x4 keypad plus slider, while nanoWatt XLP keeps the always-on touch-wake current negligible. The 32 KB Flash easily holds a touch library plus the application UI code in one image.
Recomendado
Portable Medical Accessories
The PIC18LF45K22-E/ML works well in portable medical accessories because the nanoWatt XLP technology supports long battery life and the 12-bit ADC provides sufficient resolution for pulse-oximetry, temperature, and pressure-sensor signal chains. The 1.8 V to 3.6 V core aligns with single-cell Li-ion chemistries used in patient wearables, and the 44-pin QFN allows a small, sealed enclosure. The internal 64 MHz oscillator removes the need for an external crystal in many designs, improving reliability.
Recomendado
Electronic Metering and Data Loggers
The PIC18LF45K22-E/ML is a strong fit for electronic metering and data-logger designs because its 256-byte EEPROM survives power cycles for tariff or calibration data, and the 32 KB Flash stores up to 30 days of timestamped consumption logs at 15-minute intervals. The dual EUSART enables simultaneous Modbus master and slave ports for sub-metering networks, while nanoWatt XLP keeps standby draw below the metering spec limit. The 44-pin QFN supports a tamper-resistant SMD layout.
Recomendado
Home Appliance User Interface Boards
The PIC18LF45K22-E/ML drives home-appliance UI boards because its 44-pin QFN footprint provides enough I/O for segmented LCD or LED indicators plus button matrices, and the CTMU simplifies capacitive control buttons on washer, oven, and dishwasher panels. The extended temperature grade tolerates oven-cabinet heat, while the MSSP peripherals connect to off-board Wi-Fi or BLE modules for app-controlled appliances. The 32 KB Flash fits the appliance state-machine plus a small safety-monitoring task.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18LF45K22-E/ML — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC18LF46K22-E/ML | PIC18F45K22-E/ML | PIC18LF45K22-I/ML | PIC18F46K22-E/ML | PIC18LF45K40-E/ML |
|---|---|---|---|---|---|---|
| Package | 44-QFN (8x8 mm) ML | 44-QFN (8x8 mm) ML - same | 44-QFN (8x8 mm) ML - same | 44-QFN (8x8 mm) ML - same | 44-QFN (8x8 mm) ML - same | 44-QFN (8x8 mm) ML - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 64 KB | 32 KB | 32 KB | 64 KB | 32 KB |
| RAM | 1.5 KB | 3.8 KB | 1.5 KB | 1.5 KB | 3.8 KB | 2 KB |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.0 V to 5.5 V | 1.8 V to 3.6 V | 2.0 V to 5.5 V | 1.8 V to 3.6 V |
| Operating Temperature | -40C to +125C (E) | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Low-Power XLP Sleep | Yes (nanoWatt XLP) | Yes (nanoWatt XLP) | Yes (nanoWatt XLP) | Yes (nanoWatt XLP) | Yes (nanoWalt XLP) | Yes (nanoWatt XLP) |
Diferenciadores clave
- Wide-voltage 1.8 V to 3.6 V core for single-cell Li-ion battery operation (frente a PIC18F45K22-E/ML)
- NanoWatt XLP sleep current below 100 nA (frente a PIC18LF25K22-I/SO)
- Extended -40C to +125C temperature grade in a compact QFN-44 (frente a PIC18LF45K22-I/ML)
Notas de diseño
Solder the exposed thermal pad (EP) of the 44-pin QFN to a continuous ground plane with at least 6 thermal vias to the inner ground layer. Place the VDD/VSS bulk (10 uF) and bypass (0.1 uF) capacitors within 5 mm of their respective pins. The QFN lead frame requires PCB land pattern extensions matching the Microchip package drawing; non-soldered EP will derate the thermal performance by 30 percent and may cause thermal-shutdown under heavy ADC and PWM load.
Use the nanoWatt XLP sleep modes (Sleep, Idle, Doze) whenever the application can pause the CPU. With the RTCC running from its 32 kHz source and the MSSP/I/O pins configured to wake on edge interrupts, total sleep current drops below 100 nA at 3.0 V. Estimated: based on datasheet typical curves at room temperature, this enables a 600 mAh CR2032 to power a 1 Hz sample loop for more than 5 years. Brown-out and low-voltage detect settings must be configured to match the chosen VDD range to avoid spurious resets.
Do not connect the MCLR pin directly to VDD without a pull-up; the PIC18 K22 family requires MCLR to be high for normal operation and only low for reset. Use the internal weak pull-up by enabling the MCLRE configuration bit, or place an external 10 kohm pull-up to VDD. Do not drive PGC/PGD (ICSP) lines with any external source during programming, or the in-circuit serial programmer will fail to handshake. Confirm CONFIG words in code match the target voltage range or the part will not start up at 1.8 V.
Información de cumplimiento
RoHS and REACH compliance per Microchip product page; not AEC-Q100 qualified (industrial/consumer grade); lead-free reflow profile per JEDEC J-STD-020.
