PIC18LF44J11T-I/PT - 16KB Flash 8-Bit MCU 48MHz TQFP-44 | Microchip
MPN: PIC18LF44J11T-I/PT ✓ Hoạt độngPIC18LF44J11T-I/PT Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF44J11T-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF44J11T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, Communication Interfaces, Timers.
PIC18LF44J11-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF45J11T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F46J11-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F46J50-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF44J10T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF448T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF44J11T-I/PT Tỷ lệ tối đa & tính chất điện
| 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 |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp | 44-pin TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC18LF44J11T-I/PT
| Chân 1 | VDDCORE — Core voltage regulator output, decoupling capacitor required |
| Chân 2 | RA0 — Digital I/O / AN0 |
| Chân 3 | RA1 — Digital I/O / AN1 |
| Chân 4 | RA2 — Digital I/O / AN2 / VREF- |
| Chân 5 | RA3 — Digital I/O / AN3 / VREF+ |
| Chân 6 | RA4 — Digital I/O / T0CKI |
| Chân 7 | RA5 — Digital I/O / AN4 |
| Chân 8 | VDD — Positive supply voltage input |
| Chân 9 | VSS — Ground reference |
| Chân 10 | RA7 — Digital I/O / OSC1 |
| Chân 11 | RA6 — Digital I/O / OSC2 |
| Chân 12 | RC0 — Digital I/O / T1CKI |
| Chân 13 | RC1 — Digital I/O / CCP2 |
| Chân 14 | RC2 — Digital I/O / CCP1 |
| Chân 15 | VUSB — USB internal 3.3 V regulator output, capacitor required |
| Chân 16 | RC4 — Digital I/O / D- USB data minus |
| Chân 17 | RC5 — Digital I/O / D+ USB data plus |
| Chân 18 | RC6 — Digital I/O / TX1 |
| Chân 19 | RC7 — Digital I/O / RX1 |
| Chân 20 | VSS — Ground reference |
| Chân 21 | RB0 — Digital I/O / INT0 / FLT0 |
| Chân 22 | RB1 — Digital I/O / INT1 |
| Chân 23 | RB2 — Digital I/O / INT2 |
| Chân 24 | RB3 — Digital I/O / INT3 |
| Chân 25 | RB4 — Digital I/O / I/O with IOC |
| Chân 26 | RB5 — Digital I/O / I/O with IOC |
| Chân 27 | RB6 — Digital I/O / ICSPCLK / PGC |
| Chân 28 | RB7 — Digital I/O / ICSPDAT / PGD |
| Chân 29 | VDD — Positive supply voltage input |
| Chân 30 | VSS — Ground reference |
| Chân 31 | RD0 — Digital I/O / PSP0 |
| Chân 32 | RD1 — Digital I/O / PSP1 |
| Chân 33 | RD2 — Digital I/O / PSP2 |
| Chân 34 | RD3 — Digital I/O / PSP3 |
| Chân 35 | RC3 — Digital I/O / SCL1 / SCK1 |
| Chân 36 | RD4 — Digital I/O / PSP4 |
| Chân 37 | RD5 — Digital I/O / PSP5 |
| Chân 38 | RD6 — Digital I/O / PSP6 / TX2 |
| Chân 39 | RD7 — Digital I/O / PSP7 / RX2 |
| Chân 40 | AVDD — Analog positive supply |
| Chân 41 | AVSS — Analog ground reference |
| Chân 42 | RE0 — Digital I/O / AN5 / RD |
| Chân 43 | RE1 — Digital I/O / AN6 / WR |
| Chân 44 | RE2 — Digital I/O / AN7 / CS |
Ứng dụng tiêu biểu
PIC18LF44J11T-I/PT phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF44J11T-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Lowest unit price point in PIC18F4XJ11 family with USB (vsPIC18F46J11-I/PT)
- Integrated USB 2.0 Full-Speed engine with internal transceiver (vsPIC18LF44J10T-I/PT)
- nanoWatt XLP deep-sleep currents under 100 nA (vsPIC18F46J11-I/PT)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial -40C to +85C temperature grade; not AEC-Q100 qualified (automotive-grade parts have /VAO suffix).