PIC18LF45K50-E/PT - 8-bit 48MHz 32KB Flash MCU | Microchip
N.º da peça: PIC18LF45K50-E/PT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.45 | $4,45 |
| 10 | $3.96 | $39,60 |
| 100 | $3.51 | $351,00 |
| 500 | $3.15 | $1.575,00 |
| 1.000 | $2.78 | $2.780,00 |
PIC18LF45K50-E/PT Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash), data memory (RAM), and peripherals on one die. The PIC18F/LF family uses an enhanced Harvard RISC architecture with 16-bit instructions and 8-bit data paths, positioning it between simple 8-bit controllers (PIC10/12/16) and 16-bit dsPIC or 32-bit ARM Cortex-M devices in Microchip's portfolio. The 'F' (Flash) and 'LF' (Low-Voltage Flash) variants differentiate only by operating voltage range.
Key features include 32KB (16K x 16) Flash program memory, 2KB SRAM, 256B EEPROM, 36 digital I/O pins, a 10-bit ADC with 25 channels, two 8-bit timers plus three 16-bit timers, two comparators, two CCP modules, and an enhanced USART. The integrated USB 2.0 full-speed transceiver with on-chip 3.3V regulator eliminates the need for external USB components, making this MCU ideal for USB peripherals on battery power.
Architecturally, the PIC18LF45K50 uses a 16-bit instruction word with an 8-bit data bus, an 8-level hardware stack, and a single-cycle hardware multiplier. The 48MHz internal oscillator provides 12 MIPS performance with ±1% accuracy across voltage and temperature. XLP technology enables sleep currents below 50 nA, watchdog timer currents under 400 nA, and peripheral functions while drawing microamps.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), battery-powered data loggers, USB-to-UART bridges, environmental sensor nodes, and consumer electronics with USB connectivity. The combination of integrated USB and XLP makes it particularly attractive for self-powered USB devices drawing power from the bus only when active.
When designing with this device, ensure the VUSB pin has a 220 nF decoupling capacitor and the D+/D- lines use 90Ω differential impedance. The internal 3.3V USB regulator requires a 10µF bulk capacitor on the VUSB3V3 pin. For bus-powered designs, total current draw must remain below 100 mA (low-power) or 500 mA (high-power) per USB specifications.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Alternativas drop-in para PIC18LF45K50-E/PT — 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 PIC18LF45K50-E/PT (mesmo formato e footprint) — diferindo em Operating Temperature, Package, ADC, Communication, Comparators.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F45K50-I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$2.74 / unidade
Ver ficha técnica →PIC18LF45K50-I/PT
✅ Drop-In✓ Em estoque
$2.52 / unidade
Ver ficha técnica →PIC18LF45K40-I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.62 / unidade
Ver ficha técnica →PIC18LF45K22-I/PT
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC18LF45K42-I/PT
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC18LF45K50-E/PT Classificações máximas e características elétricas
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Family | PIC® XLP™ 18K |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 2 KB |
| EEPROM | 256 B |
| Maximum CPU Frequency | 48 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V (LF variant) |
| Temperatura de operação | -40 C to +125 C (E = Extended) |
| I/O Pins | 36 |
| ADC | 10-bit, 25 channels |
| Timers | 2 x 8-bit, 3 x 16-bit |
| Comparators | 2 |
| CCP Modules | 2 |
| Communication | USB 2.0 FS, EUSART, I2C, SPI |
| Encapsulamento | 44-pin TQFP (10x10 mm) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do PIC18LF45K50-E/PT
| Pino 1 | RC6/TX/CK — Digital I/O / EUSART TX / I2C clock |
| Pino 2 | RC7/RX/DT — Digital I/O / EUSART RX / I2C data |
| Pino 3 | RE0 — Digital I/O (Port E bit 0) |
| Pino 4 | RE1 — Digital I/O (Port E bit 1) |
| Pino 5 | RE2 — Digital I/O (Port E bit 2) |
| Pino 6 | VDD — Positive power supply |
| Pino 7 | VSS — Ground reference |
| Pino 8 | VUSB3V3 — USB internal 3.3V regulator output (decouple 10uF) |
| Pino 9 | RA0/AN0 — Digital I/O / ADC input 0 |
| Pino 10 | RA1/AN1 — Digital I/O / ADC input 1 |
| Pino 11 | RA2/AN2 — Digital I/O / ADC input 2 |
| Pino 12 | RA3/AN3 — Digital I/O / ADC input 3 |
| Pino 13 | RA4/AN4 — Digital I/O / ADC input 4 |
| Pino 14 | RA5/AN5 — Digital I/O / ADC input 5 |
| Pino 15 | RE3 — Digital input only (Port E bit 3) |
| Pino 16 | OSC1/CLKIN — Crystal oscillator input / external clock |
| Pino 17 | OSC2/CLKOUT — Crystal oscillator output |
| Pino 18 | RC0 — Digital I/O (Port C bit 0) |
| Pino 19 | RC1 — Digital I/O (Port C bit 1) |
| Pino 20 | RC2 — Digital I/O (Port C bit 2) |
| Pino 21 | RC3 — Digital I/O (Port C bit 3) |
| Pino 22 | RC4/D- — Digital I/O / USB D- (alternate pin) |
| Pino 23 | RC5/D+ — Digital I/O / USB D+ (alternate pin) |
| Pino 24 | RC6 — Digital I/O (Port C bit 6) |
| Pino 25 | RC7 — Digital I/O (Port C bit 7) |
| Pino 26 | RB0/AN12 — Digital I/O / ADC input 12 / interrupt-on-change |
| Pino 27 | RB1/AN10 — Digital I/O / ADC input 10 |
| Pino 28 | RB2/AN8 — Digital I/O / ADC input 8 |
| Pino 29 | RB3/AN9 — Digital I/O / ADC input 9 |
| Pino 30 | RB4/AN11 — Digital I/O / ADC input 11 |
| Pino 31 | RB5/AN13 — Digital I/O / ADC input 13 |
| Pino 32 | RB6/ICSPCLK — Digital I/O / ICSP clock / ICD clock |
| Pino 33 | RB7/ICSPDAT — Digital I/O / ICSP data / ICD data |
| Pino 34 | VUSB — USB voltage sense input (decouple 220nF) |
| Pino 35 | RD0 — Digital I/O (Port D bit 0) |
| Pino 36 | RD1 — Digital I/O (Port D bit 1) |
| Pino 37 | RD2 — Digital I/O (Port D bit 2) |
| Pino 38 | RD3 — Digital I/O (Port D bit 3) |
| Pino 39 | RD4 — Digital I/O (Port D bit 4) |
| Pino 40 | RD5 — Digital I/O (Port D bit 5) |
| Pino 41 | RD6 — Digital I/O (Port D bit 6) |
| Pino 42 | RD7 — Digital I/O (Port D bit 7) |
| Pino 43 | VSS — Ground reference |
| Pino 44 | VDD — Positive power supply |
Aplicações típicas
PIC18LF45K50-E/PT é adequado para 6 aplicaçãos: USB HID Peripheral Devices, USB-to-UART Bridge / CDC Device, Battery-Powered Data Logger, USB Sensor Node / IoT Endpoint, Custom USB Test & Measurement Instrument, Consumer USB Charging / Power Bank Controller.
USB HID Peripheral Devices
The PIC18LF45K50-E/PT is purpose-built for USB Human Interface Device (HID) peripherals such as keyboards, mice, game controllers, custom input panels, and barcode scanners. Its integrated USB 2.0 full-speed transceiver with on-chip 3.3V regulator eliminates external USB components, reducing BOM cost and PCB area. The 32KB Flash comfortably fits Microchip's free USB HID stack plus application logic, while XLP sleep currents below 50 nA extend battery life in wireless HID dongles. At 48MHz/12 MIPS, the MCU handles HID report processing, debouncing, and LED/indicator updates without CPU bottlenecks.
Recomendado
USB-to-UART Bridge / CDC Device
The PIC18LF45K50-E/PT serves as a USB-to-serial bridge using the CDC (Communications Device Class) profile, replacing bulky RS-232 cables with USB. Its integrated USB transceiver plus EUSART peripheral provides a two-chip USB-to-UART solution (the PIC plus a MAX3232 level shifter for legacy RS-232, or a direct TTL UART for 3.3V targets). The 48MHz CPU handles USB enumeration and UART data without flow control, and 2KB RAM accommodates USB packet buffers. Firmware updates via USB DFU simplify field upgrades.
Recomendado
Battery-Powered Data Logger
The PIC18LF45K50-E/PT's XLP (eXtreme Low Power) technology makes it ideal for battery-powered data loggers measuring temperature, humidity, pressure, or vibration. Sleep currents below 50 nA and ADC operation under 1 µA enable multi-year battery life from a single CR2032 coin cell. The 25-channel 10-bit ADC supports multiple sensors via a multiplexer, while 2KB RAM buffers thousands of samples between USB data transfers. The integrated USB enables direct PC download without an external programmer, simplifying field retrieval.
Recomendado
USB Sensor Node / IoT Endpoint
The PIC18LF45K50-E/PT powers USB-connected IoT sensor endpoints that draw power from the bus and report environmental data via HID or vendor-class USB. Its combination of integrated USB, 25-channel ADC, and XLP low-power modes enables self-powered or bus-powered sensor designs without external regulators. The 48MHz CPU runs lightweight protocol stacks (vendor-class USB, custom HID reports) while the integrated peripherals handle sensor I/O, PWM fan control, or LED status indicators. Compatible with Raspberry Pi and PC USB host stacks via standard drivers.
Recomendado
Custom USB Test & Measurement Instrument
The PIC18LF45K50-E/PT is well-suited for low-cost USB test instruments such as logic analyzers (limited channels), signal generators, or simple oscilloscope front-ends. Its 48MHz/12 MIPS performance samples up to ~1 MSPS via the 10-bit ADC (with software averaging), while the integrated USB streams data to the host PC at 12 Mbps. The 32KB Flash fits USB isochronous or bulk transfer firmware plus custom measurement routines. 2KB RAM buffers samples between USB transfers, enabling continuous waveform capture.
Recomendado
Consumer USB Charging / Power Bank Controller
The PIC18LF45K50-E/PT can implement a USB-based smart charging controller or low-power power bank with status reporting over USB. Its ADC monitors battery voltage and current, the CCP modules drive PWM-controlled charging FETs, and the integrated USB reports state-of-charge to the host. The 1.8-3.6V LF voltage range directly supports single-cell Li-ion/polymer batteries without a boost regulator. Sleep currents below 1 µA preserve shelf life during storage.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF45K50-E/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F45K50-I/PT | PIC18LF45K50-I/PT | PIC18LF45K40-I/PT | PIC18LF45K42-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (10x10) | 44-pin TQFP (10x10) - same | 44-pin TQFP (10x10) - same | 44-pin TQFP (10x10) - same | 44-pin TQFP (10x10) - same |
| Operating Voltage | 1.8V to 3.6V | 2.0V to 5.5V | 1.8V to 3.6V - same | 1.8V to 3.6V - same | 1.8V to 3.6V - same |
| Flash Memory | 32 KB | 32 KB - same | 32 KB - same | 16 KB (-50%) | 32 KB - same |
| Integrated USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed - same | USB 2.0 Full-Speed - same | No | No |
| ADC Resolution | 10-bit | 10-bit - same | 10-bit - same | 10-bit - same | 12-bit (+20%) |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Principais diferenciais
- Integrated USB 2.0 Full-Speed transceiver with on-chip 3.3V regulator (vs PIC18LF45K40-I/PT)
- 32KB Flash with full HID/CDC USB framework support (vs PIC18LF45K22-I/PT)
- Wide 1.8V-3.6V LF operating range for battery-powered designs (vs PIC18F45K50-I/PT)
Notas de projeto
The PIC18LF45K50-E/PT has two distinct power domains: VDD (1.8-3.6V main logic) and VUSB3V3 (USB transceiver 3.3V regulated output). Place a 10µF ceramic capacitor on VUSB3V3 and a 220nF capacitor on VUSB to satisfy USB spec requirements. When bus-powered, total device current (including USB enumeration) must remain below 100mA for low-power or 500mA for high-power configurations per USB 2.0 specification.
For USB 2.0 full-speed compliance, route D+ and D- as a 90Ω differential pair with characteristic impedance matching the USB spec. Keep trace length under 50mm and avoid stubs. Place the VUSB3V3 decoupling capacitor (10µF) and VUSB capacitor (220nF) within 5mm of their respective pins. The 48MHz internal oscillator eliminates the need for an external crystal in most designs, freeing two pins.
Do not apply voltages above 3.6V to VDD on the 'LF' variant - this will damage the part. Use the 'F' (non-LF) variant for 5V systems. The internal 3.3V USB regulator cannot supply external loads beyond a few mA. For ICSP programming, ensure PGC/PGD pins (RB6/RB7) are not overloaded with external capacitance greater than 30pF, as this can prevent reliable programming.
The internal 48MHz oscillator provides ±1% accuracy across voltage and temperature - sufficient for UART baud rates up to 115200 and USB full-speed operation. For timing-critical applications, the PLL can synthesize 96MHz from the 48MHz oscillator for use by the USB module. If using an external crystal, place load capacitors within 3-5mm of the OSC1/OSC2 pins and guard the traces with a ground pour to prevent noise coupling.
Informações de conformidade
RoHS and REACH compliant per Microchip product documentation. The /PT suffix indicates lead-free TQFP packaging. AEC-Q100 qualification not available for this part; automotive applications should use qualified variants. Halogen-free mold compound per Microchip environmental compliance data.