PIC18LF45J11T-I/ML - 48MHz 8-bit MCU 32KB Flash 44-QFN | Microchip
부품 번호: PIC18LF45J11T-I/ML ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.15 | $41.50 |
| 100 | $3.68 | $368.00 |
| 500 | $3.29 | $1,645.00 |
| 1,000 | $2.94 | $2,940.00 |
| 1,600 | $2.78 | $4,448.00 |
PIC18LF45J11T-I/ML 개요
What is a PIC18 microcontroller? A PIC18 microcontroller is an 8-bit RISC (Reduced Instruction Set Computer) MCU from Microchip Technology's PIC18 family, sitting at the mid-range of Microchip's PIC microcontroller hierarchy. PIC18 -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The PIC18 core offers 77 instructions, hardware multiplier, 32-level stack, and C-friendly architecture, making it a step up from PIC16 in code density and interrupt handling while remaining more deterministic than 32-bit Cortex-M cores for simple real-time tasks.
Key features of the PIC18LF45J11T-I/ML include a 10-bit ADC with up to 13 channels, multiple communication peripherals (USB 2.0 FS, two I2C/SPI, two USART with LIN support), four 8-bit/16-bit timers, two analog comparators, and nanoWatt XLP power-saving modes that drop current consumption below 100 nA in sleep. The 48 MHz internal oscillator eliminates the need for an external crystal in many designs, while the 44-QFN package provides a compact 8x8 mm footprint with excellent thermal dissipation through the exposed pad.
The architecture uses a 16-bit instruction word with single-cycle execution for most instructions, giving an effective throughput of 12 MIPS at 48 MHz. The 32KB Flash supports self-programming and is partitioned into a bootloader region plus application code, while 4KB of SRAM supports data-heavy USB stacks and TCP/IP libraries. The integrated USB 2.0 full-speed transceiver and on-chip pull-up resistors remove the need for external USB PHY components in HID, CDC, or vendor-class device designs.
Typical applications include USB human-interface devices (HID keyboards, mice, game controllers), USB-to-UART bridges and virtual COM ports, industrial sensor nodes with LIN bus, low-power battery-powered IoT endpoints, and consumer appliances requiring capacitive-touch or analog front-end support. The combination of USB, ample RAM, and XLP sleep current makes it well-suited for always-on peripherals that must wake on interrupt and serve a USB host.
When designing with this device, note that the QFN-44 EP package requires reflow soldering and a thermal pad soldered to a ground copper pour for mechanical reliability. Programming is supported through Microchip's MPLAB X IDE with XC8 compiler; ICD3/Pickit 4 debug headers require dedicated pins (PGC/PGD) and may need isolation from application circuitry. Be sure to enable the internal weak pull-ups on unused pins to avoid floating-input current draw.
This page consolidates distributor pricing, drop-in alternatives in the same 44-QFN footprint, and practical design notes not always visible in the manufacturer datasheet.
드롭인 대체품: PIC18LF45J11T-I/ML — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC18LF45J11T-I/ML (동일 폼 팩터 및 풋프린트) — 차이점: Package, Timers, I/O Pins, Communication, Program Memory (Flash).
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC18LF45J11-I/ML
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC18LF46J11T-I/ML
✅ 드롭인✓ 재고 있음
$3.17 / 개
데이터시트 보기 →PIC18LF45J10-I/ML
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$3.61 / 개
데이터시트 보기 →PIC18LF44J10-I/ML
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$2.2 / 개
데이터시트 보기 →PIC18F45J11T-I/ML
✅ 드롭인✓ 재고 있음
$3.2 / 개
데이터시트 보기 →PIC18LF4523-I/ML
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$4.12 / 개
데이터시트 보기 →PIC18LF45J11T-I/ML 최대 정격 & 전기적 특성
| Core Architecture | PIC18 (8-bit RISC, 77 instructions) |
| Maximum CPU Clock | 48 MHz (12 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| Data Memory (SRAM) | 4 KB |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| 패키지 | 44-pin QFN-EP (8x8 mm) |
| 동작 온도 | -40 C to +85 C (Industrial) |
| USB Peripheral | USB 2.0 Full-Speed with on-chip transceiver |
| ADC | 10-bit, up to 13 channels |
| Communication Peripherals | 2x I2C/SPI, 2x USART (LIN-capable), USB FS |
| Timers | 4 (8-bit/16-bit selectable) |
| Analog Comparators | 2 |
| Power-Saving Modes | nanoWatt XLP (sleep current < 100 nA typical) |
| 실장 유형 | Surface Mount |
| MSL 레벨 | MSL3 (per JEDEC J-STD-020) |
| RoHS 상태 | Compliant (lead-free QFN package) |
| Programming/Debug | ICSP via PGC/PGD; compatible with MPLAB X / XC8 / PICkit 4 / ICD 4 |
PIC18LF45J11T-I/ML 44-pin qfn-ep (8x8 mm) 핀 구성 가이드
PIC18LF45J11T-I/ML(44-pin qfn-ep (8x8 mm) 패키지)의 핀 구성입니다. 이 디지털 IC에는 GPIO, 통신 인터페이스(UART, SPI, I2C), 전원 핀이 포함되어 있습니다. 대체 핀 기능과 구성 옵션은 제조사 데이터시트를 참조하십시오. 임베디드 시스템 설계와 PCB 레이아웃에 필수적입니다.
다음에 대한 상세 핀아웃 데이터 없음: PIC18LF45J11T-I/ML.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
PIC18LF45J11T-I/ML 적합 용도: 6 애플리케이션s: USB HID Peripherals, USB-to-UART Bridge, Industrial Sensor Nodes with LIN Bus, Battery-Powered IoT Endpoints, Consumer Appliance Control Panels, Capacitive Touch User Interfaces.
USB HID Peripherals
The PIC18LF45J11T-I/ML is well suited to USB Human Interface Devices such as keyboards, mice, gamepads, and numeric keypads because it integrates a USB 2.0 full-speed device peripheral with on-chip transceiver and internal pull-up resistor on the D+ line, eliminating the external PHY and pull-up BOM. Its 32 KB Flash holds the USB HID stack plus application firmware, while 4 KB SRAM supports HID report buffers and macro tables. Operating at 48 MHz (12 MIPS), the core services 1 ms USB polling intervals with ample headroom for debounce and RGB LED driving via PWM.
추천
USB-to-UART Bridge
In USB-to-UART bridges (virtual COM ports, debug consoles, RS-232 adapters), the PIC18LF45J11T-I/ML runs the USB CDC class and bridges data to its on-chip USART with hardware flow control, eliminating the need for an FTDI chip. The 4 KB RAM buffers full-speed USB packets at 12 Mbps without flow stall at typical 115200 baud rates. Industrial -40C to +85C operation lets the bridge operate inside outdoor enclosures alongside motors or heaters. Two USARTs allow simultaneous bridging plus a debug log channel.
추천
Industrial Sensor Nodes with LIN Bus
The PIC18LF45J11T-I/ML fits LIN (Local Interconnect Network) sensor nodes used in automotive body electronics and industrial distributed I/O, because both on-chip USARTs support LIN 1.3/2.0 with auto-baud detection and break-field generation. The 10-bit ADC with 13 input channels handles multiple analog sensors (temperature, pressure, level) from a single MCU. The wide 2.0 V to 5.5 V supply and -40 C to +85 C industrial range cover 12 V automotive battery drops and outdoor industrial rails without level shifting.
추천
Battery-Powered IoT Endpoints
Battery-powered IoT endpoints benefit from the PIC18LF45J11T-I/ML nanoWatt XLP technology, which drops sleep current below 100 nA while retaining RAM and interrupt-on-change wake-up, allowing multi-year coin-cell operation. The wide 2.0 V supply supports direct connection to single-cell Li-ion/LiFePO4 from full charge down to cutoff. The 32 KB Flash stores TLS handshake fragments or LoRaWAN stacks, and 4 KB RAM buffers sensor data before wake-up transmission. Two analog comparators allow zero-crossing wake from sensor events.
추천
Consumer Appliance Control Panels
Consumer appliances (washing machines, dishwashers, coffee makers, microwaves) use the PIC18LF45J11T-I/ML as a front-panel controller, because its 34 I/O pins drive multiplexed 7-segment or TFT displays, keypads, and buzzer PWM. The integrated USB FS allows factory firmware update or service diagnostics via a USB-C connector. The 5 V tolerance lets it directly drive relays and triacs through opto-isolators without level shifters. The 44-QFN-EP package fits inside the tight enclosure of compact appliances.
추천
Capacitive Touch User Interfaces
The PIC18LF45J11T-I/ML supports capacitive-touch user interfaces (touch buttons, sliders, proximity sensors) using its 10-bit ADC with charge-time measurement on mTouch-capable pins, plus hardware PWM for haptic feedback. The 4 KB RAM holds touch baseline history and gesture state machines, while 32 KB Flash stores the capacitive-touch library and application logic. Combined with the integrated USB, designers can deliver a touch panel that also enumerates as a USB HID composite device (touch + consumer-control) to the host PC.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC18LF45J11T-I/ML — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC18LF45J11-I/ML | PIC18LF46J11T-I/ML | PIC18LF45J10-I/ML | PIC18LF44J10-I/ML | PIC18F45J11T-I/ML | PIC18LF4523-I/ML |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN-EP (8x8 mm) | 44-QFN-EP (8x8 mm) - same | 44-QFN-EP (8x8 mm) - same | 44-QFN-EP (8x8 mm) - same | 44-QFN-EP (8x8 mm) - same | 44-QFN-EP (8x8 mm) - same | 44-QFN-EP (8x8 mm) - same |
| Flash Memory | 32 KB | 32 KB | 64 KB | 32 KB | 16 KB | 32 KB | 32 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 2 KB | 4 KB | 4 KB | 2 KB |
| Maximum Clock | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 40 MHz (10 MIPS) |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 3.6 V | 2.0 V to 5.5 V |
| USB 2.0 Peripheral | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | No | No | Yes (Full-Speed) | No |
| I/O Pins | 34 | 34 | 34 | 34 | 34 | 34 | 34 |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
주요 차별점
- Integrated USB 2.0 Full-Speed with on-chip transceiver (vs PIC18LF45J10-I/ML)
- Wide-voltage 2.0-5.5 V supply range (vs PIC18F45J11T-I/ML)
- Higher 12 MIPS throughput than legacy PIC18F4523 (vs PIC18LF4523-I/ML)
- 4 KB SRAM vs 2 KB on lower-tier PIC18LF45J10 (vs PIC18LF45J10-I/ML)
설계 노트
The PIC18LF45J11T-I/ML in 44-QFN-EP (8x8 mm) dissipates up to approximately 800 mW at 48 MHz and 5.5 V into the exposed thermal pad, which must be soldered to a copper ground pour of at least 1 square inch to keep junction temperature below 125 C. Without the thermal pad connection, the package has very high thermal resistance and can overheat during heavy USB activity. Estimated: assume 8 mm^2 thermal pad with 4-layer 1-oz copper pours gives theta_JA ~28 C/W.
Place the 0.1 uF VDD decoupling capacitor within 3 mm of the VDD pins, and a bulk 1 uF to 10 uF capacitor on the same power trace within 10 mm. The USB D+ and D- traces must be routed as a 90-ohm differential pair, length-matched within 2 mm, and kept away from clock or switching traces. The exposed thermal pad requires an array of thermal vias (typically 9-16 vias on 1.0-1.2 mm pitch) to the inner ground plane for heat sinking.
The PIC18LF45J11T-I/ML requires configuration bits (CONFIG1L through CONFIG5L/H) to be programmed correctly for oscillator selection, brown-out voltage, and watchdog timer before the device will run reliably. Unprogrammed configuration bits default to a state that disables the PLL and selects internal RC. Always use MPLAB X to generate the configuration settings and verify the .hex file before production programming. ICD debugging requires the PGC/PGD pins to be accessible and not loaded by external circuitry.
When using the USB peripheral, the VUSB pin requires a 0.47 uF decoupling capacitor close to the pin to filter internal transceiver noise. Internal pull-up on D+ is selectable via firmware but defaults OFF; enable it only when the device is configured, never at POR, to avoid enumerating before firmware initializes. For USB-IF compliance, the D+/D- traces must be 90-ohm differential with no stubs.
규정 준수 정보
RoHS-compliant lead-free QFN package per Microchip product page. Halogen-free status not explicitly stated in the indexed sources. Not AEC-Q100 qualified - the PIC18 family does not include automotive-grade variants in the LF45J11 sub-family.