PIC18LF45K40T-I/ML - 32KB Flash 8-Bit XLP MCU 64MHz QFN-44
부품 번호: PIC18LF45K40T-I/ML ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.72 | $17.20 |
| 100 | $1.55 | $155.00 |
| 500 | $1.34 | $670.00 |
| 1,000 | $1.18 | $1,180.00 |
| 3,300 | $1.05 | $3,465.00 |
PIC18LF45K40T-I/ML 개요
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (RAM), data EEPROM and a rich set of on-chip peripherals into one package. PIC18 MCUs sit in the mid-range 8-bit tier of Microchip's product line, above base-line PIC10/12/16 parts in code density and peripheral integration, and below the PIC24/dsPIC and 32-bit families in raw compute throughput. The "LF" prefix indicates a wide-voltage device that can run across 1.8 V to 3.6 V (F-version parts extend this to 5.5 V), enabling direct battery-powered designs.
Key features include Microchip's eXtreme Low Power (XLP) technology with claimed nanoWatt sleep currents, 10-bit ADC with Computation (ADC2), 5-bit DAC, two comparators, multiple Capture/Compare/PWM modules, Complementary Waveform Generator (CWG), Windowed Watchdog Timer (WWDT), CRC/SCAN hardware and Zero-Cross Detect. Core-Independent Peripherals handle events without CPU wake-up, which is critical for XLP designs. The 44-pin QFN footprint exposes up to 36 I/O pins supporting multiple communication peripherals including UART, SPI and I2C.
Typical applications include low-power IoT sensor nodes, battery-powered instrumentation, white goods and small appliance controls, USB-less human-interface panels and industrial sensor-conditioning nodes. The exposed-pad QFN package also makes it suitable for space-constrained layouts where thermal conduction into the PCB ground plane is needed for the higher F-version dissipation.
When designing with this part, ensure the exposed pad is soldered to a sufficient copper area for thermal relief. The QFN-44 (8x8 mm) footprint differs from the 40-pin PDIP and 44-pin TQFP variants of the same die - plan your PCB land pattern accordingly and verify the pinout against the family datasheet.
This page synthesizes distributor pricing, tape-and-reel availability, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
드롭인 대체품: PIC18LF45K40T-I/ML — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC18LF45K40T-I/ML (동일 폼 팩터 및 풋프린트) — 차이점: ADC, Package, Operating Temperature, I/O Pins, Comparators.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC18LF45K40-I/ML
✅ 드롭인✓ 재고 있음
$1.92 / 개
데이터시트 보기 →PIC18LF46K40T-I/ML
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
PIC18LF45K22T-I/ML
✅ 드롭인✓ 재고 있음
$2.45 / 개
데이터시트 보기 →PIC18LF45K40T-I/ML 최대 정격 & 전기적 특성
| Core | PIC18 8-bit enhanced MCU |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 2 KB |
| Data EEPROM | 256 B |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V (LF family) |
| ADC | 10-bit with Computation (ADC2) |
| DAC | 5-bit |
| Comparators | 2 |
| 패키지 | 44-pin QFN (8x8 mm) with exposed pad |
| 동작 온도 | -40C to +85C (I grade) |
| I/O Pins | Up to 36 |
| XLP Technology | Yes (nanoWatt sleep) |
| Packaging | Tape & Reel ("T" suffix) |
| RoHS 상태 | Compliant |
PIC18LF45K40T-I/ML 44-pin qfn (8x8 mm) with exposed pad 핀 구성 가이드
PIC18LF45K40T-I/ML(44-pin qfn (8x8 mm) with exposed pad 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: PIC18LF45K40T-I/ML.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
PIC18LF45K40T-I/ML 적합 용도: 6 애플리케이션s: Battery-Powered IoT Sensor Node, White Goods / Small Appliance Control, Industrial Sensor Conditioning Module, HMI / User Interface Panel, Automotive Body / Interior Node (non-Automotive Grade), Portable Test & Measurement Instrument.
Battery-Powered IoT Sensor Node
The PIC18LF45K40T-I/ML suits battery-powered IoT sensor nodes because its 1.8 V-3.6 V wide-voltage range lets it run directly from a 2x AA or Li-ion cell without a boost converter. Its XLP nanoWatt sleep current (under 50 nA typical) plus Retention-only RAM mode lets a 2,400 mAh Li-ion cell survive multi-year deployments. The 10-bit ADC2 with Computation handles oversampling locally, the 5-bit DAC can drive a reference, and CWG plus PWM peripherals drive sensor excitation without waking the core. The 44-pin QFN (8x8 mm) footprint keeps the PCB small, while the exposed pad enables thermal relief for higher F-version variants in hotter enclosures.
추천
White Goods / Small Appliance Control
The PIC18LF45K40T-I/ML fits small-appliance control boards where its PIC18 K40 peripheral mix replaces several discrete timers. The 36 available I/O pins drive multiplexed key matrices, LED arrays, seven-segment displays and triac-fired heater or motor loads. The Complementary Waveform Generator (CWG) handles dead-band control for half-bridge drivers, while multiple PWM channels drive BLDC or universal motors. The -40C to +85C industrial temperature rating covers kitchen and laundry environments, and the 32 KB Flash is sufficient for fuzzy-logic or PID firmware with on-board diagnostics. The QFN-44 footprint shrinks the PCB versus legacy 44-pin TQFP designs.
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Industrial Sensor Conditioning Module
The PIC18LF45K40T-I/ML is well-matched to 4-20 mA loop-powered or 24 V industrial sensor-conditioning modules. Its 10-bit ADC2 with Computation oversamples low-frequency transducer signals (RTD, thermistor, strain gauge) and computes averages/hysteresis in hardware, offloading the CPU. The on-chip 5-bit DAC and two comparators implement window comparators for alarm outputs without external op-amps. CRC/SCAN and WWDT hardware satisfy IEC 61508 SIL-1 type functional-safety expectations at minimal firmware cost. Industrial-grade -40C to +85C operation and the wide-voltage LF supply range handle transients on 24 V rails without auxiliary regulation.
추천
HMI / User Interface Panel
The PIC18LF45K40T-I/ML drives low-cost HMI panels with capacitive touch buttons, segmented LCDs (via the on-chip LCD controller not available on this K40 derivative but reachable via the family), LED status rings, and UART/SPI/I2C bridges to a host controller. The 36 I/O pins support up to 12 capacitive-touch channels through the on-chip CVD module, eliminating an external touch IC. Core-Independent Peripherals debounce inputs and run displays while the CPU sleeps, which keeps the XLP current budget intact. The QFN-44 (8x8 mm) package enables compact front-panel PCBs behind a bezel.
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Automotive Body / Interior Node (non-Automotive Grade)
For non-safety automotive interior applications such as ambient lighting, seat-position memory or HVAC blend-door actuators, the PIC18LF45K40T-I/ML delivers the right mix of PWM, ADC and Core-Independent Peripherals. Note this part is industrial-grade, not AEC-Q100 qualified - select a PIC18F or PIC18LF K40 part explicitly carrying the -Q1 or -VAO suffix for AEC-Q100 requirements. The LF variant's 1.8 V-3.6 V range runs directly from automotive 3.3 V rails. Designers should validate PCB-level ESD/EMI compliance against ISO 7637-2 and ISO 10605 transients externally.
추천
Portable Test & Measurement Instrument
The PIC18LF45K40T-I/ML powers portable handheld test instruments like multimeters, insulation testers and process calibrators where low current draw and rich analog integration matter. The 10-bit ADC2 with Computation, two comparators and 5-bit DAC implement stimulus-response measurement loops without external ASICs. The QFN-44 (8x8 mm) package fits inside a probe handle, and XLP sleep lets the instrument idle on a coin cell for months between uses. SPI/UART interfaces connect to an LCD controller or BLE module for tethered data logging.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC18LF45K40T-I/ML — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC18LF45K40-I/ML | PIC18LF45K40-I/PT | PIC18LF45K40-E/PT | PIC18LF46K40T-I/ML | PIC18LF45K22T-I/ML |
|---|---|---|---|---|---|---|
| Package | 44-QFN (8x8 mm) with EP | 44-QFN (8x8) - same | 44-TQFP - different | 44-TQFP - different | 44-QFN (8x8) - same | 44-QFN (8x8) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 3 KB | 1.5 KB |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) | 1.8 V to 3.6 V (LF) |
| Temperature Grade | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) |
| ADC | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC2 | 10-bit ADC |
주요 차별점
- XLP nanoWatt sleep under 50 nA typical (vs PIC18LF45K22T-I/ML)
- ADC2 with Computation oversampling (vs PIC18LF45K22T-I/ML)
- 1.8 V to 3.6 V wide-voltage LF range (vs PIC18F45K40 (F-version))
설계 노트
The 44-pin QFN (8x8 mm) package on the PIC18LF45K40T-I/ML exposes a central thermal pad that MUST be soldered to a PCB copper pour. Use an array of thermal vias (typically 9-12 vias at 0.3 mm drill) connecting the EP to the inner ground plane. Insufficient EP soldering reduces theta_JA and risks latch-up during in-circuit programming or power-on transients.
Place a 100 nF decoupling capacitor as close as possible to the Vdd pin and a bulk 10 uF tantalum or ceramic on the same node. The LF variant operates from 1.8 V to 3.6 V; ensure the regulator ripple is below 30 mVpp to avoid ADC2 noise pickup. For XLP nanoWatt sleep designs, the in-rush current on wake-up must be limited to avoid the brown-out reset tripping at low Vdd.
Do not assume the LF and F prefixes are interchangeable at the firmware level - LF requires 1.8 V-3.6 V while F supports up to 5.5 V. Programming voltage timing parameters, BOR thresholds and ADC acquisition delays differ between LF and F; always re-validate your config bits against the PIC18(L)F45K40 datasheet (DS40001579D). Also verify the "T" suffix is recognized by your pick-and-place - some feeders need an explicit reel-flag in the BOM.
When using the 10-bit ADC2 with Computation oversampling at high PWM duty cycles, route analog traces away from PWM switching lines and add a guard ring tied to analog ground around sensitive nets. The on-chip 5-bit DAC is suitable for trim and reference use but should not drive low-impedance loads directly - buffer with an MCP6002 or similar op-amp for production designs.
규정 준수 정보
RoHS compliant per Microchip product page and distributor listings. The PIC18LF45K40T-I/ML is NOT AEC-Q100 qualified - select a -Q1 or -VAO K40 suffix for AEC-Q100 automotive requirements.
