PIC18LF44J11T-I/PT - 16KB Flash 8-Bit MCU 48MHz TQFP-44 | Microchip
N.º de pieza: PIC18LF44J11T-I/PT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.55 | $3,55 |
| 10 | $3.19 | $31,90 |
| 100 | $2.84 | $284,00 |
| 500 | $2.55 | $1.275,00 |
| 1.000 | $2.26 | $2.260,00 |
PIC18LF44J11T-I/PT Descripción general
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path that integrates a CPU, non-volatile program memory, working RAM, configurable digital I/O, and a mix of on-chip peripherals such as timers, ADC, communication controllers, and (in USB-capable variants) a USB device/engine. The PIC18 family occupies Microchip's mid-to-high performance 8-bit tier, sitting above baseline PIC10/PIC12/PIC16 parts and below the PIC24/dsPIC 16-bit families in code density, interrupt capability, and peripheral integration. Within the power-management IC hierarchy, the MCU belongs to the embedded-controller tier, where it sequences rails, samples sensors, and drives user interfaces.
Key features include 34 digital I/O pins, 10-bit ADC, two analog comparators, two USART modules, two SPI/I2C MSSP peripherals, two 8-bit timers plus three 16-bit timers, and 16 KB self-programmable Flash with typical 10,000 erase/write cycles. The integrated nanoWatt XLP power manager provides multiple low-power sleep modes with current consumption in the nanoampere range during deep sleep, dramatically extending battery life in always-on wireless sensor and metering applications.
Typical applications include USB Human Interface Devices (HID) such as keyboards and mice, smart-card readers, industrial sensing nodes, building automation controllers, portable medical accessories, and low-cost graphics/segmented-display user interfaces. The wide 2.0-3.6 V operating range directly supports single-cell Li-ion or 3.3 V regulated rails, while the LF low-voltage variant allows operation down to 2.0 V for two-cell battery stacks and energy-harvesting sources.
When designing with this MCU, place a 0.1 uF decoupling capacitor as close as possible to every VDD/VDDCORE pin pair and follow Microchip AN585 reference for in-circuit serial programming (ICSP) layout. The ICSPDAT/ICSPCLK pins must remain accessible for production programming; route them with short stubs to a 6-pin header.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes drawn from Microchip datasheet DS39931 and verified distributor listings, providing context beyond the manufacturer datasheet.
Alternativas directas para PIC18LF44J11T-I/PT — 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 PIC18LF44J11T-I/PT (mismo factor de forma y huella) — difiere en Package, ADC, Operating Temperature, Communication Interfaces, Timers.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18LF44J11-I/PT
✅ Sustitución directa✓ En stock
$2.89 / unidad
Ver hoja de datos →PIC18LF45J11T-I/PT
✅ Sustitución directa✓ En stock
$2.72 / unidad
Ver hoja de datos →PIC18F46J11-I/PT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18F46J50-I/PT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18LF44J10T-I/PT
✅ Sustitución directa✓ En stock
$3.05 / unidad
Ver hoja de datos →PIC18LF448T-I/PT
✅ Sustitución directa✓ En stock
$5.32 / unidad
Ver hoja de datos →PIC18LF44J11T-I/PT Valores máximos y características eléctricas
| Core | PIC18 8-bit RISC |
| Program Memory (Flash) | 16 KB (8K x 16) |
| RAM | 4 KB |
| Max CPU Clock | 48 MHz |
| Instruction Throughput | 12 MIPS |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| Extended Operating Voltage | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| ADC | 10-bit |
| Timers | 2 x 8-bit, 3 x 16-bit |
| Communication | 2x USART, 2x MSSP (SPI/I2C) |
| USB | USB 2.0 Full-Speed Device |
| Low-Power Technology | nanoWatt XLP |
| Temperatura de funcionamiento | -40C to +85C (Industrial) |
| Encapsulado | 44-pin TQFP (10x10 mm) |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 3 (168 hours) |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
Configuración de pines de PIC18LF44J11T-I/PT
| Pin 1 | VDDCORE — Core voltage regulator output, decoupling capacitor required |
| Pin 2 | RA0 — Digital I/O / AN0 |
| Pin 3 | RA1 — Digital I/O / AN1 |
| Pin 4 | RA2 — Digital I/O / AN2 / VREF- |
| Pin 5 | RA3 — Digital I/O / AN3 / VREF+ |
| Pin 6 | RA4 — Digital I/O / T0CKI |
| Pin 7 | RA5 — Digital I/O / AN4 |
| Pin 8 | VDD — Positive supply voltage input |
| Pin 9 | VSS — Ground reference |
| Pin 10 | RA7 — Digital I/O / OSC1 |
| Pin 11 | RA6 — Digital I/O / OSC2 |
| Pin 12 | RC0 — Digital I/O / T1CKI |
| Pin 13 | RC1 — Digital I/O / CCP2 |
| Pin 14 | RC2 — Digital I/O / CCP1 |
| Pin 15 | VUSB — USB internal 3.3 V regulator output, capacitor required |
| Pin 16 | RC4 — Digital I/O / D- USB data minus |
| Pin 17 | RC5 — Digital I/O / D+ USB data plus |
| Pin 18 | RC6 — Digital I/O / TX1 |
| Pin 19 | RC7 — Digital I/O / RX1 |
| Pin 20 | VSS — Ground reference |
| Pin 21 | RB0 — Digital I/O / INT0 / FLT0 |
| Pin 22 | RB1 — Digital I/O / INT1 |
| Pin 23 | RB2 — Digital I/O / INT2 |
| Pin 24 | RB3 — Digital I/O / INT3 |
| Pin 25 | RB4 — Digital I/O / I/O with IOC |
| Pin 26 | RB5 — Digital I/O / I/O with IOC |
| Pin 27 | RB6 — Digital I/O / ICSPCLK / PGC |
| Pin 28 | RB7 — Digital I/O / ICSPDAT / PGD |
| Pin 29 | VDD — Positive supply voltage input |
| Pin 30 | VSS — Ground reference |
| Pin 31 | RD0 — Digital I/O / PSP0 |
| Pin 32 | RD1 — Digital I/O / PSP1 |
| Pin 33 | RD2 — Digital I/O / PSP2 |
| Pin 34 | RD3 — Digital I/O / PSP3 |
| Pin 35 | RC3 — Digital I/O / SCL1 / SCK1 |
| Pin 36 | RD4 — Digital I/O / PSP4 |
| Pin 37 | RD5 — Digital I/O / PSP5 |
| Pin 38 | RD6 — Digital I/O / PSP6 / TX2 |
| Pin 39 | RD7 — Digital I/O / PSP7 / RX2 |
| Pin 40 | AVDD — Analog positive supply |
| Pin 41 | AVSS — Analog ground reference |
| Pin 42 | RE0 — Digital I/O / AN5 / RD |
| Pin 43 | RE1 — Digital I/O / AN6 / WR |
| Pin 44 | RE2 — Digital I/O / AN7 / CS |
Aplicaciones típicas
PIC18LF44J11T-I/PT es adecuado para 6 aplicacións: USB HID Devices (Keyboard / Mouse), Battery-Powered Wireless Sensor Nodes, Smart Card Readers and Token Devices, Industrial Sensing and Control, Portable Medical Accessories, Building Automation Controllers.
USB HID Devices (Keyboard / Mouse)
The PIC18LF44J11T-I/PT is purpose-built for USB Human Interface Device (HID) applications such as keyboards, mice, game controllers, and consumer input peripherals. Its integrated USB 2.0 Full-Speed engine with internal 3.3 V regulator and on-chip transceiver eliminates the need for external USB PHY chips, reducing BOM cost by approximately $0.30-$0.50 per unit. The 48 MHz PLL derives USB clock directly from the internal oscillator so no external crystal is required for USB operation. With 16 KB Flash and 4 KB RAM, the MCU comfortably fits Microchip's USB HID stack (about 6 KB Flash) plus custom HID report descriptors for keyboards and mice.
Recomendado
Battery-Powered Wireless Sensor Nodes
The PIC18LF44J11T-I/PT's nanoWatt XLP technology delivers sub-microampere deep-sleep currents (typically 100 nA in sleep mode with RTCC running), making it ideal for battery-powered wireless sensor nodes such as remote environmental monitors, smart thermostats, and energy-harvesting IoT endpoints. The wide 2.0-3.6 V operating range directly supports single-cell Li-ion (3.0-4.2 V with LDO) and dual-AA alkaline stacks. The 4 KB RAM and 34 I/O easily accommodate sensor interfaces (SPI/ADC), while two USARTs can drive a Bluetooth Low Energy module and a debug serial port simultaneously.
Recomendado
Smart Card Readers and Token Devices
USB smart card readers, e-commerce security tokens, and PIV/CAC readers benefit from the PIC18LF44J11T-I/PT's USB Full-Speed device controller combined with 34 digital I/O for smart card clock, I/O, reset, and presence detect lines. The 4 KB RAM is sufficient to buffer ISO 7816 T=0 and T=1 protocol exchanges, while the integrated MSSP peripherals handle synchronous smart card communication. The industrial -40C to +85C temperature grade supports outdoor payment terminals and kiosk-mounted readers in varied climates.
Recomendado
Industrial Sensing and Control
In industrial sensing and control applications such as programmable logic controllers, sensor interface boards, and HVAC controllers, the PIC18LF44J11T-I/PT offers a balanced feature set: 10-bit ADC for analog sensor reading, two analog comparators for over-current/voltage detection, two USARTs for RS-232/RS-485 field-bus connectivity, and two MSSP ports for SPI-based DACs and I2C sensor expansion. The 48 MHz / 12 MIPS performance handles 50-100 Hz closed-loop PID cycles without CPU contention, while nanoWatt XLP allows the MCU to enter sleep between samples to reduce node-level power consumption by 80-90 percent.
Recomendado
Portable Medical Accessories
The PIC18LF44J11T-I/PT is well suited for portable medical accessory applications such as USB-connected glucometer data loggers, pulse-oximeter dongles, and patient monitoring peripherals, where the integrated USB 2.0 Full-Speed device engine simplifies CDC-class connectivity to host PCs. The 2.0-3.6 V operating range accommodates single-cell Li-ion batteries commonly used in handheld medical devices. The wide 34-I/O count supports multiple sensor front-ends (I2C/SPI), LCD drive, and battery monitoring. However, for FDA Class III designs, additional qualification and risk analysis are required - the MCU itself is not FDA-qualified.
Recomendado
Building Automation Controllers
Building automation subsystems including HVAC zone controllers, occupancy sensor hubs, and lighting control panels benefit from the PIC18LF44J11T-I/PT's robust USB stack (for commissioning via PC), 34 digital I/O for relay and triac drive, and nanoWatt XLP low-power modes for always-on applications. Two USARTs allow simultaneous connection to a wireless module and a wired RS-485 backbone, while MSSP peripherals drive I2C sensor arrays (temperature, humidity, CO2) at the zone level. The 16 KB Flash supports BACnet/Modbus application layers plus custom automation logic without external memory expansion.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18LF44J11T-I/PT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC18LF44J11-I/PT | PIC18F46J11-I/PT | PIC18F46J50-I/PT | PIC18LF45J11T-I/PT | PIC18LF44J10T-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 / TQFP-64 | TQFP-44 (10x10 mm) - same |
| Program Memory (Flash) | 16 KB | 16 KB | 64 KB | 64 KB | 16 KB | 16 KB |
| RAM | 4 KB | 4 KB | 3.9 KB | 3.9 KB | 4 KB | 4 KB |
| Max Clock | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 40 MHz (10 MIPS) |
| USB | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed with on-chip PHY | USB 2.0 Full-Speed Device | No USB engine |
| Low-Power Technology | nanoWatt XLP | nanoWatt XLP | nanoWatt | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP |
| Supply Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| I/O Pins | 34 | 34 | 39 | 39 | 49 (64-pin variant) | 34 |
| Unit Price (qty 1, USD) | $3.55 | $3.60 | $4.20 | $5.10 | $3.75 | $3.40 |
Diferenciadores clave
- Lowest unit price point in PIC18F4XJ11 family with USB (frente a PIC18F46J11-I/PT)
- Integrated USB 2.0 Full-Speed engine with internal transceiver (frente a PIC18LF44J10T-I/PT)
- nanoWatt XLP deep-sleep currents under 100 nA (frente a PIC18F46J11-I/PT)
Notas de diseño
Place a 0.1 uF decoupling capacitor as close as possible to each VDD/VDDCORE/VSS pin pair (4 pairs total on the 44-pin TQFP). Add a bulk 4.7 uF-10 uF tantalum or ceramic capacitor on the main VDD rail within 1 cm of the package. The VUSB pin (pin 15) requires its own 220 nF ceramic capacitor for the internal 3.3 V USB regulator. Incorrect decoupling is the most common root cause of USB enumeration failures and brown-out resets.
The ICSPDAT (RB7/pin 28) and ICSPCLK (RB6/pin 27) pins must remain accessible for production programming. Do not populate external pull-ups or push-buttons on these pins. Route them with short stubs to a 6-pin in-circuit programming header (Microchip pinout: 1=VPP/MCLR, 2=VDD, 3=VSS, 4=ICSPDAT, 5=ICSPCLK, 6=NC). Configure CONFIG3H to disable the IOL1WAY bit only if you must reuse these as general-purpose I/O after programming.
Route the USB D+ (RC5/pin 17) and D- (RC4/pin 16) differential pair as a 90-ohm impedance matched pair with no stubs. Keep the pair length-matched to within 150 mil and route over a continuous ground plane. Avoid placing any traces beneath the VUSB capacitor or the MCU's exposed thermal pad. Per USB 2.0 specifications, the total length of the D+/D- pair should not exceed 50 mm on the PCB.
Información de cumplimiento
RoHS compliant per Microchip product page. Industrial -40C to +85C temperature grade; not AEC-Q100 qualified (automotive-grade parts have /VAO suffix).