PIC18LF44J50-I/PT - 8-bit 48MHz 16KB Flash USB MCU TQFP-44 | Microchip
N.º da peça: PIC18LF44J50-I/PT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.2 | $4,20 |
| 10 | $3.78 | $37,80 |
| 100 | $3.36 | $336,00 |
| 500 | $3 | $1.500,00 |
| 1.000 | $2.66 | $2.660,00 |
PIC18LF44J50-I/PT Visão geral
An 8-bit microcontroller (MCU) is a small computer-on-a-chip integrating a CPU core, program memory (Flash), data RAM, non-volatile EEPROM, and peripheral interfaces into a single package. Within the broader semiconductor taxonomy, an MCU belongs to microcontrollers -> integrated circuits -> semiconductors. The PIC18LF family is Microchip's high-performance 8-bit line, adding hardware multipliers, C-friendly architecture, and enhanced peripherals to the legacy PIC16 core.
Key features of the PIC18LF44J50 include 48MHz operation (12 MIPS), 16KB Flash, 3778 bytes RAM, 256 bytes EEPROM, 34 digital I/O pins, 13 10-bit ADC channels, 2 analog comparators, 2 UART/USART, SPI and I2C (MSSP), 5 16-bit timers, 2 8-bit timers, and an integrated full-speed USB 2.0 device with on-chip transceiver. The 'LF' prefix denotes the wide-voltage 2.0V to 5.5V operating range with nanoWatt XLP low-power modes (<100 nA typical sleep current).
Architecturally, the PIC18LF44J50 uses a Harvard RISC core with 16-bit instructions and 8-bit data path, an 8x8 hardware multiplier for DSP-style math, and a separate 16-bit instruction prefetch queue. The integrated USB 2.0 full-speed (12 Mbps) PHY eliminates the need for an external transceiver, while the on-chip 2.5V/3.3V regulator allows single-rail 5V operation.
Typical applications include USB HID peripherals (keyboards, mice, custom HID), USB-to-UART bridges, USB data loggers, low-power sensor nodes with USB charging, and industrial USB interfaces. The wide 2.0V to 5.5V input range and nanoWatt XLP technology also make it suitable for battery-powered devices.
When designing with this part, note that the TQFP-44 footprint matches other PIC18F4xJ50 family members; firmware is built with MPLAB X IDE and the XC8 compiler. The internal voltage regulator requires an external decoupling network and proper cap selection to avoid noise coupling into the analog peripherals.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes for the PIC18LF44J50-I/PT that go beyond the manufacturer datasheet's parametric table.
Alternativas drop-in para PIC18LF44J50-I/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 PIC18LF44J50-I/PT (mesmo formato e footprint) — diferindo em Package, ADC, RoHS Status, Communication, Core Architecture.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F44J50-I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$2.55 / unidade
Ver ficha técnica →PIC18LF44J50T-I/PT
✅ Drop-In✓ Em estoque
$2.95 / unidade
Ver ficha técnica →PIC18LF45J50-I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$2.85 / unidade
Ver ficha técnica →PIC18LF46J50-I/PT
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC18F45J50-I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F46J50-I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF44J50-I/PT Classificações máximas e características elétricas
| Core Architecture | PIC18 8-bit RISC |
| Family | PIC18LFxxJ50 (nanoWatt XLP) |
| Maximum Clock Speed | 48 MHz (12 MIPS) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Tensão de alimentação | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| Analog Comparators | 2 |
| Timers (16-bit / 8-bit) | 5 / 2 |
| Communication | USB 2.0 FS Device, 2x UART, SPI, I2C (MSSP) |
| USB | Integrated Full-Speed PHY + SIE |
| Encapsulamento | TQFP-44 (10x10 mm) |
| Operating Temperature (I grade) | -40C to +85C |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| Lead-Free | Yes |
Configuração de pinos do PIC18LF44J50-I/PT
| Pino 1 | RB7 — I/O port B bit 7 |
| Pino 2 | RB6 — I/O port B bit 6 |
| Pino 3 | RB5 — I/O port B bit 5 |
| Pino 4 | RB4 — I/O port B bit 4 |
| Pino 5 | RB3 — I/O port B bit 3 |
| Pino 6 | RB2 — I/O port B bit 2 |
| Pino 7 | RB1 — I/O port B bit 1 |
| Pino 8 | RB0 — I/O port B bit 0 |
| Pino 9 | VDD — Positive supply |
| Pino 10 | VSS — Ground |
| Pino 11 | RC7 — I/O port C bit 7 / RX for USB |
| Pino 12 | RC6 — I/O port C bit 6 / TX for USB |
| Pino 13 | D+ — USB D+ line |
| Pino 14 | D- — USB D- line |
| Pino 15 | VDD — Positive supply |
| Pino 16 | VSS — Ground |
| Pino 17 | RA0 — I/O port A bit 0 / AN0 |
| Pino 18 | RA1 — I/O port A bit 1 / AN1 |
| Pino 19 | RA2 — I/O port A bit 2 / AN2 |
| Pino 20 | RA3 — I/O port A bit 3 / AN3 / VREF+ |
| Pino 21 | RA4 — I/O port A bit 4 / AN4 |
| Pino 22 | RA5 — I/O port A bit 5 / AN5 / VREF- |
| Pino 23 | RA6 — I/O port A bit 6 |
| Pino 24 | RA7 — I/O port A bit 7 |
| Pino 25 | VSS — Ground |
| Pino 26 | OSC1 — Crystal oscillator input |
| Pino 27 | OSC2 — Crystal oscillator output |
| Pino 28 | RC0 — I/O port C bit 0 |
| Pino 29 | RC1 — I/O port C bit 1 |
| Pino 30 | RC2 — I/O port C bit 2 |
| Pino 31 | VDD — Positive supply |
| Pino 32 | VSS — Ground |
| Pino 33 | RD0 — I/O port D bit 0 |
| Pino 34 | RD1 — I/O port D bit 1 |
| Pino 35 | RD2 — I/O port D bit 2 |
| Pino 36 | RD3 — I/O port D bit 3 |
| Pino 37 | RD4 — I/O port D bit 4 |
| Pino 38 | RD5 — I/O port D bit 5 |
| Pino 39 | RD6 — I/O port D bit 6 |
| Pino 40 | RD7 — I/O port D bit 7 |
| Pino 41 | RE0 — I/O port E bit 0 |
| Pino 42 | RE1 — I/O port E bit 1 |
| Pino 43 | RE2 — I/O port E bit 2 |
| Pino 44 | RE3 — I/O port E bit 3 |
Aplicações típicas
PIC18LF44J50-I/PT é adequado para 6 aplicaçãos: USB HID Peripherals (Keyboard, Mouse, Custom HID), USB-to-UART Bridge / CDC Virtual COM Port, Battery-Powered USB Data Logger, USB-Connected Industrial Sensor / Control Module, USB Custom HID Consumer / Wearable Device, USB Cable Replacement / Wireless Bridge Companion.
USB HID Peripherals (Keyboard, Mouse, Custom HID)
The PIC18LF44J50-I/PT is an ideal core for USB Human Interface Device designs thanks to its integrated USB 2.0 Full-Speed transceiver and SIE, which eliminate the need for an external PHY and simplify BOM. At 48 MHz / 12 MIPS the core handles HID report parsing with low latency, while 16 KB Flash and 34 digital I/O support key matrix scanning, LED indicators, and capacitive touch sensing. The 2.0V to 5.5V range allows direct VBUS-powered operation with on-chip regulator. Use it in mechanical keyboards, custom HID controllers, presentation clickers, and gaming peripherals where full-speed USB and a small BOM matter most.
Recomendado
USB-to-UART Bridge / CDC Virtual COM Port
In USB-to-UART bridge designs the PIC18LF44J50-I/PT's integrated USB Full-Speed PHY, on-chip UART, and on-chip voltage regulator reduce the design to a single chip plus a USB connector. Its 48 MHz core drives CDC ACM throughput up to the USB Full-Speed ceiling while leaving MIPS headroom for command parsing, while the LF supply range tolerates bus-powered 5V directly. Pair it with a 12 MHz crystal for USB accuracy and use the MSSP for SPI/I2C bridging. Choose this part when designing cable replacement, debug loggers, or firmware reflashing interfaces that require a CDC-ACM profile and minimal BOM.
Recomendado
Battery-Powered USB Data Logger
The PIC18LF44J50-I/PT fits USB-charged data loggers because nanoWatt XLP technology drops sleep current below 100 nA, while the integrated USB PHY handles battery charging via enumeration. Its 10-bit ADC and 34 I/O accept sensor inputs (temperature, humidity, voltage), and 16 KB Flash stores time-stamped samples before USB upload. The 2.0V to 5.5V VDD range supports single-cell Li-ion (3.0V to 4.2V) directly without boost converters. Typical deployments include cold-chain loggers, portable environmental monitors, and USB-stick form-factor data recorders requiring 30+ day battery life on a CR2032 or Li-Po cell.
Recomendado
USB-Connected Industrial Sensor / Control Module
In industrial environments the PIC18LF44J50-I/PT provides a USB-attached module with 13 ADC channels and 2 analog comparators for 4 mA to 20 mA loop monitoring, thermistor bridges, and digital I/O for relay or LED control. The industrial -40C to +85C (I grade) temperature range matches factory-floor requirements. The on-chip USB Full-Speed device negotiates with industrial PCs for configuration upload and telemetry download without external PHYs. The 48 MHz core runs Modbus-over-USB or vendor-class protocols in real time. It is a strong choice for USB-configurable sensor transmitters, test fixtures, and lab instrumentation front ends.
Recomendado
USB Custom HID Consumer / Wearable Device
Wearables and consumer USB devices benefit from the PIC18LF44J50-I/PT's nanoWatt XLP sleep modes and integrated USB that together minimize BOM and extend battery life. The 34 I/O can drive small OLEDs, vibration motors, and capacitive buttons, while the 10-bit ADC reads biometric sensors. At 48 MHz the core runs BLE-friendly HID bridge logic or fitness-tracker USB sync protocols. The wide VDD range lets designers run directly from a 3.7V Li-Po without a boost converter. Choose it for activity trackers, smart-watch USB docks, and wearable medical telemetry where BOM consolidation and 5V USB tolerance matter most.
Recomendado
USB Cable Replacement / Wireless Bridge Companion
When paired with a companion RF or BLE module, the PIC18LF44J50-I/PT acts as the USB host/device bridge for cable-replacement applications. The integrated USB Full-Speed PHY, dual UART, and MSSP/SPI handle transport to/from the wireless transceiver while the core runs protocol glue and buffering. Its 48 MHz core sustains serial-over-USB throughput, and 34 I/O are sufficient for status LEDs, configuration switches, and diagnostic UART. Typical uses include BLE-to-USB dongles, RS-485-to-USB gateways, and ZigBee-to-USB coordinators where a small BOM, single-chip USB, and wide VDD range are advantageous.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF44J50-I/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F44J50-I/PT | PIC18LF45J50-I/PT | PIC18F46J50-I/PT | PIC18LF46J50-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10mm) | TQFP-44 (10x10mm) - same | TQFP-44 (10x10mm) - same | TQFP-44 (10x10mm) - same | TQFP-44 (10x10mm) - same |
| Core / Architecture | PIC18 8-bit RISC | PIC18 8-bit RISC - same | PIC18 8-bit RISC - same | PIC18 8-bit RISC - same | PIC18 8-bit RISC - same |
| Clock Speed (max) | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 16 KB | 16 KB | 32 KB (+100%) | 64 KB (+300%) | 64 KB (+300%) |
| Operating Voltage | 2.0V - 5.5V (LF) | 2.0V - 3.6V (F, not 5V-tolerant) | 2.0V - 5.5V (LF) | 2.0V - 3.6V (F, not 5V-tolerant) | 2.0V - 5.5V (LF) |
| Integrated USB | USB 2.0 Full-Speed (PHY + SIE) | USB 2.0 Full-Speed - same | USB 2.0 Full-Speed - same | USB 2.0 Full-Speed - same | USB 2.0 Full-Speed - same |
| I/O Pins | 34 | 34 | 34 | 34 | 34 |
Principais diferenciais
- Integrated USB 2.0 Full-Speed PHY on-chip (vs PIC18F4550-I/P (no internal PHY, requires external))
- Wide 2.0V to 5.5V operating voltage (LF family) (vs PIC18F44J50-I/PT (3.6V max))
- nanoWatt XLP low-power sleep modes (vs PIC18F2550-I/SP (no nanoWatt XLP))
- Larger TQFP-44 family upgrade path within same footprint (vs PIC18LF46J50-I/PT (same pinout, 64 KB Flash))
Notas de projeto
PIC18LF44J50-I/PT integrates an internal 2.5V/3.3V regulator that must be bypassed per datasheet: place 100 nF and 4.7 uF low-ESR ceramic capacitors on VDD/VUSB pins within 1 cm of the package. Add a 10 uF bulk capacitor on VBUS when bus-powered. Estimating idle current: typical sleep <100 nA at 3.3V, active 12 mA at 48 MHz. Use the internal regulator's ENVREG pin to enable/disable regulation; tying it to VDD keeps regulation on. Do not apply external voltage to the regulated core rail.
For USB Full-Speed compliance, the 90-ohm differential D+/D- traces must be matched-length (within 2 mm) and routed over a continuous ground plane; keep trace length under 50 mm total and avoid vias in the differential pair. Place the 12 MHz crystal within 5 mm of OSC1/OSC2 with guard traces to GND; load capacitance values depend on crystal datasheet (typical 12-22 pF). Add a ferrite bead between VBUS and VDD to isolate bus noise from the analog supply rail.
Estimated: At 48 MHz, VDD rise time must satisfy 0.05 V/us to 1 V/ms for proper BOR/POR. Do not exceed 5.5 V on any I/O pin even though VDD is wide-range - the LF family is 5V-tolerant on inputs only with proper configuration. Avoid leaving unused I/O floating: configure them as outputs low or inputs with internal pull-ups to minimize sleep current. When migrating between PIC18F44J50 (3.3V max) and PIC18LF44J50 (5.5V), confirm all peripherals support the higher voltage; USB D+/D- pull-up resistor to VDD must be 1.5 kOhm at 3.3V, not 5V.
Keep analog and digital sections physically separated on the PCB: place ADC reference (VREF+/VREF-) traces away from switching noise. Use a ground pour under the TQFP-44 thermal pad to improve thermal dissipation (TJA ~50 C/W). For EMI, the integrated USB reduces radiated noise vs external PHY designs; still, route the crystal traces symmetrically and add a 4-layer stack-up with dedicated ground plane for best EMC performance. Mark the package pin-1 indicator clearly for hand-rework and inspection.
Informações de conformidade
RoHS compliant and lead-free per Microchip product page. Industrial -40C to +85C grade (I suffix); not AEC-Q100 qualified - choose automotive-grade variant for vehicle applications. Halogen-free per JEDEC JS709.