PIC18LF44J50T-I/PT - 48MHz USB MCU 16KB Flash | Microchip
N.º da peça: PIC18LF44J50T-I/PT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.62 | $4,62 |
| 10 | $4.15 | $41,50 |
| 100 | $3.69 | $369,00 |
| 500 | $3.32 | $1.660,00 |
| 1.000 | $2.95 | $2.950,00 |
PIC18LF44J50T-I/PT Visão geral
What is an 8-bit PIC microcontroller? An 8-bit MCU is a single-chip computer that processes data 8 bits at a time and integrates CPU, Flash, RAM, peripherals (USB, ADC, timers), and I/O on a single die. Within the MCU hierarchy, the PIC18 family sits at the upper end of Microchip's 8-bit portfolio - above PIC10/12/16 in code size and peripheral integration. The PIC18LF44J50 is part of the 'J' family, which adds nanoWatt XLP power management, USB OTG, and a wider peripheral set. For embedded engineers, this category is ideal when deterministic real-time response and low BOM cost matter more than raw compute throughput.
Key features include a 10-bit ADC with up to 13 channels, multiple communication peripherals (USB 2.0 Full Speed, I2C, SPI, EUSART), 5 CCP/ECCP modules, two analog comparators, and CTMU support for capacitive sensing. The device supports 34 digital I/O lines and offers three low-power sleep modes typical of the nanoWatt XLP family. On-chip peripherals are mapped through peripheral pin select (PPS), providing design flexibility for pin allocation.
Architecturally, the PIC18LF44J50 combines a Harvard RISC core (with hardware multiply) running at 12 MIPS, dedicated USB SIE hardware, and a wide voltage operating range. The 'LF' suffix indicates Flash + low-voltage operation, while the J-series devices add a charge pump for USB operation from lower supply voltages. The integrated USB SIE eliminates the need for an external PHY in many designs, saving BOM cost and PCB area.
Typical applications include USB peripherals (HID, CDC, custom class), battery-powered data loggers, sensor interface boards with USB diagnostics, consumer electronics, and small industrial control nodes. The combination of USB and nanoWatt XLP sleep currents makes the part especially suited to USB-powered or intermittently active devices. When designing, select appropriate ferrite beads or chokes on VUSB to suppress bus noise, follow USB-IF pull-resistor guidance on D+/D-, and follow Microchip application notes for USB descriptor stack tuning.
Alternativas drop-in para PIC18LF44J50T-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 PIC18LF44J50T-I/PT (mesmo formato e footprint) — diferindo em Package, RoHS Status, Communication Peripherals, Core, Instruction Set.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18LF44J50-I/PT
✅ Drop-In✓ Em estoque
$2.66 / unidade
Ver ficha técnica →PIC18LF44J10T-I/PT
✅ Drop-In✓ Em estoque
$3.05 / unidade
Ver ficha técnica →PIC18LF4450T-I/PT
✅ Drop-In✓ Em estoque
$4.55 / unidade
Ver ficha técnica →PIC18LF4550T-I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF44J50T-I/PT Classificações máximas e características elétricas
| Series | PIC18 J (PIC18F46J50 family) |
| Core Processor | PIC (8-bit Harvard RISC) |
| Core Size | 8-bit |
| Maximum CPU Speed | 48 MHz (12 MIPS) |
| Program Memory Size | 16 KB Flash (8K x 16) |
| RAM Size | 4 KB (3.8K x 8) |
| Supply Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| Encapsulamento | 44-pin TQFP (10x10 mm) |
| Faixa de temperatura de operação | -40C to +85C (Industrial, 'I') |
| USB Interface | USB 2.0 Full Speed (12 Mbps), on-chip SIE |
| ADC | 10-bit, up to 13 channels |
| Communication Peripherals | USB, I2C, SPI, EUSART |
| Capture/Compare/PWM | 5 CCP / ECCP modules |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant (LEAD FREE per datasheet) |
Configuração de pinos do PIC18LF44J50T-I/PT
| Pino 1 | RC0 — Digital I/O / PWM |
| Pino 2 | RC1 — Digital I/O / PWM |
| Pino 3 | RC2 — Digital I/O / PWM |
| Pino 4 | RC3 — Digital I/O / PWM |
| Pino 5 | RC4 — Digital I/O |
| Pino 6 | RC5 — Digital I/O |
| Pino 7 | RC6 — Digital I/O / TX |
| Pino 8 | RC7 — Digital I/O / RX |
| Pino 9 | RE3 — Digital I/O / MCLR |
| Pino 10 | VSS — Ground |
| Pino 11 | VDD — Positive supply |
| Pino 12 | RA0 — Digital I/O / AN0 |
| Pino 13 | RA1 — Digital I/O / AN1 |
| Pino 14 | RA2 — Digital I/O / AN2 |
| Pino 15 | RA3 — Digital I/O / AN3 |
| Pino 16 | RA4 — Digital I/O / AN4 |
| Pino 17 | RA5 — Digital I/O / AN5 |
| Pino 18 | VDD — Positive supply |
| Pino 19 | VSS — Ground |
| Pino 20 | RA6 — Digital I/O / OSC2 |
| Pino 21 | RA7 — Digital I/O / OSC1 |
| Pino 22 | RB0 — Digital I/O / AN12 |
| Pino 23 | RB1 — Digital I/O / AN10 |
| Pino 24 | RB2 — Digital I/O / AN8 |
| Pino 25 | RB3 — Digital I/O / AN9 |
| Pino 26 | RB4 — Digital I/O / AN11 |
| Pino 27 | RB5 — Digital I/O / PGED3 |
| Pino 28 | RB6 — Digital I/O / PGEC3 |
| Pino 29 | RB7 — Digital I/O |
| Pino 30 | VDDCORE — Core voltage decoupling |
| Pino 31 | VSS — Ground |
| Pino 32 | RD0 — Digital I/O |
| Pino 33 | RD1 — Digital I/O |
| Pino 34 | RD2 — Digital I/O |
| Pino 35 | RD3 — Digital I/O |
| Pino 36 | RD4 — Digital I/O |
| Pino 37 | RD5 — Digital I/O / CCP |
| Pino 38 | RD6 — Digital I/O / CCP |
| Pino 39 | RD7 — Digital I/O / CCP |
| Pino 40 | D+ — USB data plus |
| Pino 41 | D- — USB data minus |
| Pino 42 | VBUS — USB VBUS sense |
| Pino 43 | VUSB — USB internal regulator |
| Pino 44 | RE0 — Digital I/O |
Aplicações típicas
PIC18LF44J50T-I/PT é adequado para 6 aplicaçãos: USB HID Peripheral Devices, USB CDC Virtual COM Port Devices, Battery-Powered Sensor Data Loggers, USB Charging and Power Bank Controllers, Industrial Control Nodes with USB Diagnostics, Consumer Electronics with USB Connectivity.
USB HID Peripheral Devices
The PIC18LF44J50T-I/PT's integrated USB 2.0 Full Speed SIE and 16 KB Flash make it a strong fit for USB HID peripherals such as keyboards, mice, custom input devices, and control surfaces. The 12 MIPS CPU performance easily handles HID report processing at the 1 kHz USB polling rate, while 4 KB RAM provides ample buffer space for HID report descriptors and state. The 2.0 V to 5.5 V supply range supports bus-powered designs without external regulators. Engineers typically pair this MCU with the Microchip USB stack (MCHPFSUSB), which provides ready-made HID class drivers and a small memory footprint compatible with the 16 KB Flash budget.
Recomendado
USB CDC Virtual COM Port Devices
For USB-to-UART bridge designs, the PIC18LF44J50T-I/PT integrates the USB SIE plus an EUSART, enabling CDC class implementations that appear as a virtual COM port on the host. The 48 MHz CPU and 4 KB RAM comfortably run the Microchip CDC stack with custom command handlers. Bus-powered operation from a single 3.3 V or 5 V rail is supported through the wide 2.0 V to 5.5 V supply range. Typical use cases include industrial configuration interfaces, debug consoles, and firmware update bridges for legacy RS-232 equipment.
Recomendado
Battery-Powered Sensor Data Loggers
The PIC18LF44J50T-I/PT's nanoWatt XLP low-power sleep modes and 2.0 V to 5.5 V supply range make it well-suited to battery-powered sensor data loggers. Sleep currents in the microamp range enable multi-year battery life when the MCU wakes only periodically to read sensors and store data. The 10-bit ADC with up to 13 channels can directly digitize temperature, voltage, and current sensors without external ADCs. The 4 KB RAM provides a reasonable circular buffer for samples before flushing to external EEPROM or SD card storage.
Recomendado
USB Charging and Power Bank Controllers
USB charging and power bank controllers benefit from the PIC18LF44J50T-I/PT's integrated USB SIE, 10-bit ADC for voltage and current monitoring, and PWM modules for control loop implementation. The MCU can monitor input/output voltage and current via ADC channels, drive status LEDs via PWM, and communicate status to a host over USB. The wide 2.0 V to 5.5 V supply range accommodates direct connection to single-cell Li-ion or multi-cell alkaline battery stacks without additional regulation.
Recomendado
Industrial Control Nodes with USB Diagnostics
Industrial control nodes with USB diagnostics benefit from the PIC18LF44J50T-I/PT combination of USB connectivity and industrial temperature grade (-40C to +85C). The MCU handles primary control functions via its PWM, ADC, and digital I/O while exposing a USB CDC or HID interface for field diagnostics, firmware updates, and parameter tuning. The 34 I/O pins accommodate multiple sensor inputs, actuator outputs, and communication interfaces. The wide supply range simplifies integration into 24 V industrial environments with appropriate front-end regulation.
Recomendado
Consumer Electronics with USB Connectivity
Consumer electronics such as toy controllers, learning devices, gaming peripherals, and small appliances gain USB connectivity through the PIC18LF44J50T-I/PT at minimal BOM cost. The integrated USB SIE eliminates external PHY chips, while the 16 KB Flash supports feature-rich application code including USB stacks, custom protocols, and user interfaces. The wide 2.0 V to 5.5 V supply range simplifies power design from batteries or USB bus power. Peripherals such as PWMs drive motors, LEDs, or audio outputs without additional driver ICs.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF44J50T-I/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18LF44J50-I/PT | PIC18LF44J10T-I/PT | PIC18LF4450T-I/PT | PIC18LF4550T-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | TQFP-44 - same | TQFP-44 - same | TQFP-44 - same | TQFP-44 - same |
| Core | 8-bit PIC18 J-series | 8-bit PIC18 J-series | 8-bit PIC18 J-series | 8-bit PIC18 K-series | 8-bit PIC18 (PIC18F4550) |
| Clock Speed | 48 MHz (12 MIPS) | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Program Memory (Flash) | 16 KB | 16 KB | 32 KB (+100%) | 32 KB (+100%) | 32 KB (+100%) |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 1.8 V to 3.6 V | 2.0 V to 5.5 V |
| USB Interface | USB 2.0 Full Speed integrated SIE | USB 2.0 FS SIE - same | USB 2.0 FS SIE - same | USB 2.0 FS SIE - same | USB 2.0 FS SIE - same |
Principais diferenciais
- 5.5 V maximum supply voltage (LF variant) (vs PIC18F44J50T-I/PT (F variant))
- Integrated USB 2.0 Full Speed SIE (vs PIC18LF25K50 (similar USB MCU))
- 44-pin TQFP package with 34 I/O pins (vs PIC18F4550 (40-pin DIP variant))
Notas de projeto
The PIC18LF44J50T-I/PT requires careful decoupling on both VDD and VDDCORE pins (pins 11, 18, and 30). Use a 100 nF ceramic capacitor on each VDD pin plus a bulk 10 uF tantalum or ceramic capacitor at the supply entry point. The VDDCORE pin (pin 30) requires its own 100 nF decoupling cap placed within 2 mm of the pin. The USB VUSB pin (pin 43) must have a 1 uF to 4.7 uF low-ESR capacitor per the Microchip datasheet. Bulk capacitance is essential because USB Full Speed signaling draws pulses of 100 mA from the bus during transmit.
Route USB D+ and D- traces as a 90 ohm differential pair with matched length (within 2 mm) and continuous reference plane on the layer below. Place the 27 ohm series termination resistors on D+ and D- close to the MCU pins (within 5 mm). Keep USB traces away from clock sources, switching regulators, and high-current paths to minimize common-mode noise. The Microchip datasheet recommends ferrite beads on VBUS to suppress bus noise and protect against ESD events.
Do not omit the 10 kohm pull-up resistor on D+ for full-speed USB device enumeration; without it, the host will not detect the device. Do not confuse the LF (2.0 V to 5.5 V) variant with the F (2.0 V to 3.6 V) variant when substituting - they share a power budget and pinout but have different maximum operating voltages. Ensure the VBUS sense pin is connected to USB VBUS through a voltage divider or directly, per the USB-IF compliance guidelines. Finally, configure the unused I/O pins as outputs low to minimize sleep current draw, per the nanoWatt XLP application note.
Informações de conformidade
RoHS compliant per Microchip product page and packaging code 'LEAD FREE'. Industrial temperature grade (-40C to +85C). Not AEC-Q100 qualified for automotive applications - this is a consumer/industrial grade part.