PIC18LF45K22T-I/ML - 8-bit 64MHz 32KB Flash XLP MCU | Microchip
N.º da peça: PIC18LF45K22T-I/ML ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.95 | $3,95 |
| 10 | $3.55 | $35,50 |
| 100 | $3.15 | $315,00 |
| 500 | $2.78 | $1.390,00 |
| 1.000 | $2.45 | $2.450,00 |
PIC18LF45K22T-I/ML Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, optimized for deterministic real-time control with low power consumption and small code footprint. The PIC18 line is Microchip's enhanced Harvard RISC architecture family, positioned between baseline PIC16 and 16-bit dsPIC/PIC24 devices, and it sits within the broader microcontroller taxonomy (8-bit MCU -> microcontroller -> embedded processor -> semiconductor). The "LF" prefix designates the low-voltage F-variant (fcev or flash variant with extended voltage range) operating from 1.8V to 3.6V, ideal for 2.5V/3.3V systems.
Key features include 64 MHz internal oscillator (16 MIPS throughput), 32 KB self-programmable Flash with 10-year retention, 256-byte data EEPROM, 35 I/O pins, and 14-channel 10-bit ADC. Peripherals include two rail-to-rail analog comparators, programmable HLVD (High/Low Voltage Detect), mTouch capacitive sensing module with up to 28 channels, multiple PWM modules, and communication interfaces (I2C/SPI/EUSART). The XLP technology enables nanoAmp sleep currents for extended battery life.
The device uses an enhanced Harvard RISC architecture with a 16-bit instruction set and 8-bit data path. This single-cycle pipelined core executes most instructions in one clock cycle, achieving 16 MIPS at 64 MHz, which enables efficient C-compiled code and deterministic interrupt response. On-chip peripherals are routed through Peripheral Pin Select (PPS), simplifying PCB layout versus fixed-pin PIC16 devices.
Typical applications include battery-powered IoT sensor nodes, portable medical devices, automotive body and interior modules, industrial control panels, and consumer electronics requiring low standby current. The combination of XLP low-power modes and rich analog integration is particularly valuable in remote sensor and human-interface designs.
When designing with this MCU, ensure your toolchain uses MPLAB XC8 and configure the configuration bits for the desired oscillator and watchdog settings. Note that the "T" suffix indicates tape-and-reel packaging and "I/ML" denotes the industrial temperature grade (-40C to +85C) in the QFN-44 (8x8) package.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternativas drop-in para PIC18LF45K22T-I/ML — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC18LF45K22T-I/ML (mesmo formato e footprint) — diferindo em ADC, Package, Data RAM, Operating Temperature, Comparators.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F45K22T-I/ML
✅ Drop-In✓ Em estoque
$1.95 / unidade
Ver ficha técnica →PIC18LF46K22T-I/ML
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF45K22-I/ML
✅ Drop-In✓ Em estoque
$2.28 / unidade
Ver ficha técnica →PIC18LF44K22T-I/ML
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF43K22T-I/ML
✅ Drop-In✓ Em estoque
$2.6 / unidade
Ver ficha técnica →PIC18LF45K22T-I/ML Classificações máximas e características elétricas
| Core Processor | PIC |
| Core Size | 8-bit |
| Frequência máxima de clock | 64 MHz |
| Instruction Throughput | 16 MIPS |
| Program Memory Size (Flash) | 32 KB (16K x 16) |
| RAM Size | 1536 bytes |
| EEPROM Size | 256 bytes |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Temperatura de operação | -40 C to +85 C (industrial) |
| Number of I/O Pins | 35 |
| ADC | 10-bit, 28-channel (approx., see datasheet) |
| Comparators | 2 rail-to-rail analog comparators |
| Connectivity | I2C, SPI, EUSART (UART) |
| Low-Power Technology | nanoWatt XLP |
| PWM Channels | Multiple (see datasheet for exact count) |
| Encapsulamento | 44-pin QFN (8x8) with EP |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do PIC18LF45K22T-I/ML
| Pino 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Pino 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Pino 3 | RA2/AN2 — Digital I/O / Analog input channel 2 |
| Pino 4 | RA3/AN3 — Digital I/O / Analog input channel 3 |
| Pino 5 | RA4/AN4 — Digital I/O / Analog input channel 4 |
| Pino 6 | RA5/AN5 — Digital I/O / Analog input channel 5 |
| Pino 7 | RA6/OSC2 — Digital I/O / Oscillator output |
| Pino 8 | RA7/OSC1 — Digital I/O / Oscillator input |
| Pino 9 | VSS — Ground reference |
| Pino 10 | VDD — Positive supply voltage |
| Pino 11 | RB0/INT0 — Digital I/O / External interrupt 0 |
| Pino 12 | RB1/INT1 — Digital I/O / External interrupt 1 |
| Pino 13 | RB2/INT2 — Digital I/O / External interrupt 2 |
| Pino 14 | RB3/INT3 — Digital I/O / External interrupt 3 |
| Pino 15 | RB4 — Digital I/O |
| Pino 16 | RB5 — Digital I/O |
| Pino 17 | RB6/PGC — Digital I/O / ICSP clock |
| Pino 18 | RB7/PGD — Digital I/O / ICSP data |
| Pino 19 | VSS — Ground reference |
| Pino 20 | VDD — Positive supply voltage |
| Pino 21 | RC0 — Digital I/O |
| Pino 22 | RC1 — Digital I/O |
| Pino 23 | RC2 — Digital I/O |
| Pino 24 | RC3 — Digital I/O |
| Pino 25 | RC4 — Digital I/O |
| Pino 26 | RC5 — Digital I/O |
| Pino 27 | RC6 — Digital I/O |
| Pino 28 | RC7 — Digital I/O |
| Pino 29 | VSS — Ground reference |
| Pino 30 | VDD — Positive supply voltage |
| Pino 31 | RD0 — Digital I/O |
| Pino 32 | RD1 — Digital I/O |
| Pino 33 | RD2 — Digital I/O |
| Pino 34 | RD3 — Digital I/O |
| Pino 35 | RD4 — Digital I/O |
| Pino 36 | RD5 — Digital I/O |
| Pino 37 | RD6 — Digital I/O |
| Pino 38 | RD7 — Digital I/O |
| Pino 39 | RE0 — Digital I/O |
| Pino 40 | RE1 — Digital I/O |
| Pino 41 | RE2 — Digital I/O |
| Pino 42 | RE3 — Digital I/O |
| Pino 43 | VSS — Ground reference |
| Pino 44 | VDD — Positive supply voltage |
Aplicações típicas
PIC18LF45K22T-I/ML é adequado para 6 aplicaçãos: Battery-Powered IoT Sensor Nodes, Portable Medical Monitoring Devices, Automotive Body and Interior Modules, Industrial Control Panels and HMI, Consumer Electronics with Touch Interface, Remote Wireless Sensor Hubs.
Battery-Powered IoT Sensor Nodes
The PIC18LF45K22T-I/ML is ideal for battery-powered IoT sensor nodes due to its nanoWatt XLP ultra-low-power technology and 1.8V-3.6V operating range, which enables years of operation from coin-cell or lithium cells. The 64 MHz core provides ample MIPS for sensor data processing while the multiple sleep modes (Sleep, Deep Sleep, Idle) reduce quiescent current to nanoAmp levels. The 10-bit ADC with up to 28 channels supports multi-sensor acquisition, and I2C/SPI/EUSART interfaces connect to wireless transceivers like LoRa or BLE modules. With 32 KB Flash sufficient for protocol stacks and 1536 bytes RAM for buffering, this MCU enables compact sensor designs with minimal external components.
Recomendado
Portable Medical Monitoring Devices
For portable medical monitoring devices such as pulse oximeters, glucose meters, and wearable health trackers, the PIC18LF45K22T-I/ML delivers the deterministic real-time performance and low-power profile required. The 64 MHz / 16 MIPS throughput supports real-time signal processing for biosensors while nanoWatt XLP technology extends battery life beyond 1 year in continuous-monitoring modes. The 35 I/O pins accommodate multiple sensor interfaces (SpO2, ECG, temperature), and the 10-bit ADC with 28 channels reads sensor arrays without external multiplexing. Industrial temperature grade (-40C to +85C) ensures reliability across body-temperature variation and storage conditions.
Recomendado
Automotive Body and Interior Modules
The PIC18LF45K22T-I/ML suits automotive body control modules, interior lighting, mirror controllers, and HVAC user interfaces where 8-bit MCU simplicity is preferred over 32-bit complexity. The 32 KB Flash accommodates LIN/CAN-style protocol stacks and PWM-driven LED dimming logic. Note: the I-grade variant is rated -40C to +85C; for underhood or high-temperature zones above 85C, Microchip recommends the E-grade PIC18F45K22-E/ML (-40C to +125C). The mTouch capacitive sensing module supports up to 28 touch buttons for slider and keypad interfaces commonly used in modern vehicle interiors.
Recomendado
Industrial Control Panels and HMI
For industrial control panels, machine status displays, and small HMI terminals, the PIC18LF45K22T-I/ML provides the I/O count, ADC channels, and PWM outputs needed to drive indicators, read sensors, and control actuators. The 35 I/O pins easily handle keypad scanning, LED status arrays, and relay/SSR drive circuits. Programmable HLVD (High/Low Voltage Detect) supervises the supply rail and triggers safe shutdown on brownout conditions. The two rail-to-rail analog comparators enable zero-crossing detection and threshold alarms. At 1.8V-3.6V, it integrates seamlessly into 3.3V industrial sensor networks.
Recomendado
Consumer Electronics with Touch Interface
Consumer appliances with touch interfaces (microwave ovens, coffee machines, smart thermostats) benefit from the PIC18LF45K22T-I/ML's integrated mTouch capacitive sensing module supporting up to 28 channels for buttons, sliders, and proximity sensing. The 32 KB Flash stores UI state machines and timing profiles, while 1536 bytes RAM maintains the active menu and sensor baseline data. EUSART and SPI peripherals drive character LCDs or OLED displays, and the PWM modules control buzzers, indicator LEDs, and backlight brightness. The XLP low-power modes reduce standby consumption below 100 nA.
Recomendado
Remote Wireless Sensor Hubs
Remote wireless sensor hubs for environmental monitoring, agriculture, and structural health benefit from the PIC18LF45K22T-I/ML's combination of low-power operation, sufficient Flash for protocol stacks, and rich peripheral set. The 64 MHz core handles radio packet processing while sleep modes between transmissions draw nanoAmps. Multiple PWM outputs drive status LEDs and control external analog front-ends. The 256-byte EEPROM stores calibration constants and node IDs persistently, and Peripheral Pin Select (PPS) allows flexible PCB routing when integrating RF modules like sub-GHz transceivers or BLE SoCs.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF45K22T-I/ML — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F45K22T-I/ML | PIC18LF46K22T-I/ML | PIC18LF45K22-I/ML | PIC18LF44K22T-I/ML | PIC18LF43K22T-I/ML |
|---|---|---|---|---|---|---|
| Package | 44-QFN (8x8) with EP | 44-QFN (8x8) - same | 44-QFN (8x8) - same | 44-QFN (8x8) - same | 44-QFN (8x8) - same | 44-QFN (8x8) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 32 KB | 32 KB | 64 KB | 32 KB | 16 KB | 8 KB |
| RAM | 1536 bytes | 1536 bytes | 3896 bytes | 1536 bytes | 768 bytes | 512 bytes |
| Operating Voltage | 1.8V to 3.6V | 2.3V to 5.5V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V |
| Maximum Clock | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| I/O Pins | 35 | 35 | 36 | 35 | 30 | 25 |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
Principais diferenciais
- Same QFN-44 (8x8) package as PIC18F45K22T-I/ML but with 1.8V operation (vs PIC18F45K22T-I/ML)
- 32 KB Flash is upgradeable in-place to 64 KB via PIC18LF46K22T-I/ML (vs PIC18LF46K22T-I/ML)
- Industrial temperature grade with nanoWatt XLP ultra-low-power technology (vs Generic 8-bit MCU competitors)
Notas de projeto
The PIC18LF45K22T-I/ML supports multiple low-power modes: Sleep (CPU off, peripherals off), Idle (CPU off, peripherals on), and Deep Sleep modes with RTCC. For battery-powered designs, switch to Sleep between sensor readings and use the RTCC wake-up timer to schedule periodic acquisitions. XLP typical Sleep current is below 100 nA with RTCC running. Always configure the PWRSAV instruction with the appropriate IDLEN and SRETEN bits per the datasheet power management chapter.
The 44-pin QFN (8x8) package requires careful PCB layout. Connect the exposed thermal pad (EP) directly to a solid VSS copper pour, not to VDD, to provide thermal dissipation and a low-inductance ground reference. Place 0.1 uF decoupling capacitors within 5 mm of each VDD/VSS pair (there are multiple pairs on the 44-QFN). The QFN lands must be routed out carefully since the pad-only leads have no leads to absorb soldering stress; follow Microchip App Note AN-828 for QFN layout recommendations.
Configuration bits (CONFIG1H through CONFIG5L/H) must be set correctly to enable the internal 64 MHz oscillator and disable watchdog or unwanted features. A common pitfall is leaving the watchdog timer (WDT) enabled in battery applications where it can prevent Sleep mode or cause unexpected resets. Also, ensure unused I/O pins are configured as outputs (not inputs) to avoid floating-pin current draw. Always enable the brown-out reset (BOR) at a voltage slightly below the minimum operating voltage (e.g., 1.8V for the LF variant) to prevent erratic code execution on weak batteries.
Informações de conformidade
Industrial temperature grade; not AEC-Q100 qualified (use E-grade variants or PIC18F45K22-E/ML for automotive). RoHS and REACH compliant per Microchip product environmental compliance information.
