PIC18F46K20-I/ML - 8-bit 64MHz 64KB Flash MCU 44-QFN | Microchip
부품 번호: PIC18F46K20-I/ML ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $5.5 | $5.50 |
| 10 | $4.95 | $49.50 |
| 100 | $4.41 | $441.00 |
| 500 | $3.97 | $1,985.00 |
| 1,000 | $3.52 | $3,520.00 |
PIC18F46K20-I/ML 개요
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data bus, optimized for embedded control tasks where deterministic real-time response, low cost, and simple peripherals dominate over raw throughput. The PIC18 family sits in Microchip's mid-range 8-bit hierarchy: PIC10/12/16 -> PIC18 -> 16-bit dsPIC/PIC24 -> 32-bit PIC32, serving applications from toys and appliances up to industrial sensor nodes. The 'nanoWatt XLP' branding in PIC18F46K20 highlights an ultra-low-power design with sub-uA sleep currents that enable multi-year battery life in energy-harvesting or remote-sensor products.
Key features of the PIC18F46K20 include a 64 MHz operating frequency (16 MIPS when using the 4x PLL from a 16 MHz source), 36 digital I/O pins, a 14-channel 10-bit ADC with auto-acquisition and conversion-during-sleep support, two rail-to-rail analog comparators with programmable reference, two CCP modules, an Enhanced CCP, an MSSP (SPI/I2C) peripheral, an Enhanced USART with LIN support, and a 1.2 V Fixed Voltage Reference. The 44-QFN package provides an exposed thermal pad for improved heat dissipation in high-I/O-count applications.
The PIC18F46K20's design integrates nanoWatt XLP technology (deep sleep current typically <100 nA with RTCC and WDT enabled), a 31 kHz internal oscillator, and multiple clock modes including HFINTOSC and LFINTOSC with PLL. This combination makes the part particularly suitable for both line-powered and battery-powered designs that must keep standby power low while retaining computational horsepower for periodic sensor processing.
Typical applications include industrial sensor interfaces, low-power remote metering, HVAC control panels, USB-to-UART bridges when paired with external transceivers, small appliances with LCD/keypad user interfaces, automotive body controllers, and battery-powered IoT edge nodes where the QFN footprint and high I/O count are valued.
When designing with this MCU, place a 0.1 uF decoupling capacitor on every VDD pin and a single bulk capacitor on the AVDD rail; ensure the QFN thermal pad is soldered to a continuous ground copper pour for both thermal and electrical performance. For battery applications, verify the specific nanoWatt current numbers against your chosen clock and peripheral configuration.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that supplement the Microchip datasheet and are not found on any single distributor product page.
드롭인 대체품: PIC18F46K20-I/ML — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC18F46K20-I/ML (동일 폼 팩터 및 풋프린트) — 차이점: Package, Timers, ADC, Core Architecture, Communication.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC18F46K22-I/ML
✅ 드롭인✓ 재고 있음
$3.08 / 개
데이터시트 보기 →PIC18F46K20-I/PT
✅ 드롭인✓ 재고 있음
$1.78 / 개
데이터시트 보기 →PIC18F45K22-I/ML
✅ 드롭인✓ 재고 있음
$2.65 / 개
데이터시트 보기 →PIC18F46J13-I/ML
✅ 드롭인✓ 재고 있음
$4.38 / 개
데이터시트 보기 →PIC18F46Q10-I/ML
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
PIC18F46K20-I/ML 최대 정격 & 전기적 특성
| Product Family | PIC18 XLP nanoWatt |
| Core | 8-bit PIC18 RISC |
| Operating Frequency | 64 MHz (max, with 4x PLL) |
| Instruction Throughput | 16 MIPS |
| Program Memory (Flash) | 64 KB (32K x 16) |
| SRAM | 3936 bytes |
| Data EEPROM | 1024 bytes |
| Supply Voltage (VDD) | 4.2 V to 5.5 V (Industrial -I grade) |
| I/O Pins | 36 |
| ADC | 14-channel, 10-bit |
| Analog Comparators | 2 (rail-to-rail, programmable VREF) |
| Timers | Timer0/1/2/3 plus RTCC |
| Communication Peripherals | EUSART (LIN), MSSP (SPI/I2C) |
| CCP / ECCP Modules | 2 CCP + 1 ECCP |
| 패키지 | 44-pin QFN (8x8 mm) with exposed pad |
| Operating Temperature (I grade) | -40C to +85C |
| RoHS | Compliant |
PIC18F46K20-I/ML 핀 구성
| 핀 1 | RA5/AN4/C2IN+/HLVDIN/RCV — PORTA bit 5 / ADC AN4 / Comparator input |
| 핀 2 | RA4/AN3/C2OUT — PORTA bit 4 / ADC AN3 / Comparator 2 output |
| 핀 3 | RA3/AN2/VREF+ — PORTA bit 3 / ADC AN2 / ADC VREF+ |
| 핀 4 | RA2/AN1/VREF- — PORTA bit 2 / ADC AN1 / ADC VREF- |
| 핀 5 | RA1/AN0/C1IN+/CTED — PORTA bit 1 / ADC AN0 / Comparator 1 input |
| 핀 6 | RA0/AN0/C1IN- — PORTA bit 0 / ADC AN0 / Comparator 1 input |
| 핀 7 | VDD — Digital supply voltage 4.2-5.5 V |
| 핀 8 | GND — Digital ground |
| 핀 9 | OSC1/CLKIN/RA7 — External oscillator input / PORTA bit 7 |
| 핀 10 | OSC2/CLKOUT/RA6 — External oscillator output / PORTA bit 6 |
| 핀 11 | RC0/SOSCO — PORTC bit 0 / Secondary oscillator output |
| 핀 12 | RC1/SOSCI — PORTC bit 1 / Secondary oscillator input |
| 핀 13 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 핀 14 | RC3/SCL1 — PORTC bit 3 / MSSP I2C clock |
| 핀 15 | RC4/SDA1 — PORTC bit 4 / MSSP I2C data |
| 핀 16 | RC5/SDO1 — PORTC bit 5 / MSSP SPI data out |
| 핀 17 | RC6/TX1/CK1 — PORTC bit 6 / EUSART TX / clock |
| 핀 18 | RC7/RX1/DT1 — PORTC bit 7 / EUSART RX / data |
| 핀 19 | GND — Digital ground |
| 핀 20 | VDD — Digital supply voltage 4.2-5.5 V |
| 핀 21 | RB0/INT0/AN12 — PORTB bit 0 / External interrupt 0 / ADC AN12 |
| 핀 22 | RB1/INT1/AN10 — PORTB bit 1 / External interrupt 1 / ADC AN10 |
| 핀 23 | RB2/INT2/AN8 — PORTB bit 2 / External interrupt 2 / ADC AN8 |
| 핀 24 | RB3/INT3/AN9 — PORTB bit 3 / External interrupt 3 / ADC AN9 |
| 핀 25 | RB4/KBI0/AN11 — PORTB bit 4 / Keyboard interrupt 0 / ADC AN11 |
| 핀 26 | RB5/KBI1/AN13 — PORTB bit 5 / Keyboard interrupt 1 / ADC AN13 |
| 핀 27 | RB6/KBI2/PGC — PORTB bit 6 / Keyboard interrupt 2 / ICSP clock |
| 핀 28 | RB7/KBI3/PGD — PORTB bit 7 / Keyboard interrupt 3 / ICSP data |
| 핀 29 | GND — Digital ground |
| 핀 30 | AVDD — Analog supply voltage |
| 핀 31 | AVSS — Analog ground |
| 핀 32 | RD0/ECCP1/PSP0 — PORTD bit 0 / ECCP1 / Parallel slave port data 0 |
| 핀 33 | RD1/PSP1 — PORTD bit 1 / Parallel slave port data 1 |
| 핀 34 | RD2/PSP2 — PORTD bit 2 / Parallel slave port data 2 |
| 핀 35 | RD3/PSP3 — PORTD bit 3 / Parallel slave port data 3 |
| 핀 36 | RD4/PSP4 — PORTD bit 4 / Parallel slave port data 4 |
| 핀 37 | RD5/PSP5 — PORTD bit 5 / Parallel slave port data 5 |
| 핀 38 | RD6/PSP6 — PORTD bit 6 / Parallel slave port data 6 |
| 핀 39 | RD7/PSP7 — PORTD bit 7 / Parallel slave port data 7 |
| 핀 40 | RE0/RD — PORTE bit 0 / Parallel slave port read |
| 핀 41 | RE1/WR — PORTE bit 1 / Parallel slave port write |
| 핀 42 | RE2/CS — PORTE bit 2 / Parallel slave port chip select |
| 핀 43 | VDD — Digital supply voltage 4.2-5.5 V |
| 핀 44 | GND — Digital ground / exposed thermal pad |
일반적인 애플리케이션
PIC18F46K20-I/ML 적합 용도: 7 애플리케이션s: Industrial Sensor Interface Node, Low-Power Remote Metering, HVAC Control Panel, USB-to-UART Bridge Dongle, Small Appliance Controller, Battery-Powered IoT Edge Node, Automotive Body Controller.
Industrial Sensor Interface Node
The PIC18F46K20-I/ML is well suited to industrial 4-20 mA or 0-10 V sensor interface boards that need a mix of analog and digital I/O with deterministic response. Its 14-channel 10-bit ADC handles multiple analog sensors, the nanoWatt XLP sleep reduces quiescent draw between samples, and the 36 I/O pins drive status LEDs, relay drivers, and keypad inputs. Operating from 4.2-5.5 V on the industrial 24 V->5 V rail simplifies power design and the 44-QFN exposed pad provides adequate thermal dissipation for continuous ADC operation. Pair with a TLE2426 virtual-ground rail splitter and a MAX232-style RS-232 line driver for full sensor-node functionality.
추천
Low-Power Remote Metering
Battery-powered gas, water, or electric meters benefit from the PIC18F46K20's nanoWatt XLP deep-sleep current, allowing multi-year operation on a single lithium primary cell. The on-chip 14-bit ADC handles pulse counting from metering sensors, while the EUSART provides low-speed UART communication to wireless modules, and the MSSP supports I2C sensor expansion (temperature, pressure compensation). The 64 KB Flash accommodates complex tariff/time-of-use firmware, and the 1024-byte EEPROM stores calibration constants and accumulated usage logs without external memory. The 44-QFN keeps the meter compact and supports automated SMT assembly.
추천
HVAC Control Panel
HVAC wall thermostats and zone controllers need to drive LCD displays, scan keypads, read NTC thermistors, and switch triacs for fan/blower control - all jobs for the PIC18F46K20. The 36 I/O pins multiplex a 4x4 keypad and a character LCD without external I/O expanders, while two CCP/ECCP modules generate PWM for variable-speed blower motor control. The 10-bit ADC handles multiple NTC inputs for indoor/outdoor/return-air sensing, and the analog comparators can directly monitor line-voltage zero-crossing for triac timing. NanoWatt XLP keeps wall-powered standby draw low enough to meet energy-star idle requirements.
추천
USB-to-UART Bridge Dongle
A USB-to-UART bridge is a classic PIC18 application: the MSSP drives SPI/I2C slaves, the EUSART handles async serial at up to 1 Mbps, and the 64 KB Flash stores a USB-CDC class driver and command parser. The PIC18F46K20's 64 MHz / 16 MIPS performance is sufficient to bit-bang low-speed USB with software (combined with the internal comparators for D+/D- detection), or to manage higher protocol stacks with an external USB transceiver. The 44-QFN small footprint suits thumb-drive-style dongles, and the 4.2-5.5 V VDD matches the 5 V USB-VBUS rail directly.
추천
Small Appliance Controller
Coffee machines, washing machines, and countertop kitchen appliances often use a PIC18 MCU for the main control board. The PIC18F46K20's 36 I/O pins drive seven-segment or TFT displays, scan capacitive touch keypads, switch TRIACs for heater elements, and read thermistor sensors for closed-loop temperature control. The two CCP/ECCP modules generate zero-cross-switched PWM for induction-coil or motor speed control. Industrial temperature grade (-40C to +85C) covers appliance under-hood environments, and the 44-QFN reduces PCB area versus TQFP for the cramped enclosures typical of small appliances.
추천
Battery-Powered IoT Edge Node
Wireless sensor nodes in IoT deployments combine a low-power MCU with a sub-GHz or BLE transceiver. The PIC18F46K20's nanoWatt XLP deep-sleep with RTCC running draws less than 1 uA, allowing multi-year coin-cell operation with periodic sensor reads and transmissions. The MSSP port drives SPI-based transceivers, the 14-channel ADC handles multiple sensor inputs, and the 64 KB Flash supports OTA-ready firmware with command interpreters. The exposed-pad 44-QFN aids heat spreading during transmit bursts. Pair with a Microchip MRF89XA sub-GHz or RN4871 BLE module for a complete IoT edge node.
추천
Automotive Body Controller
Automotive body controllers for door modules, seat controllers, or mirror adjusters need LIN communication, multiple PWM outputs for motor drivers, and robust operation across -40C to +85C. The PIC18F46K20's EUSART supports LIN 1.x/2.0 slave mode, the ECCP generates PWM for mirror/seat motor H-bridges, and the wide 4.2-5.5 V VDD handles 12 V automotive rail transients with proper TVS protection. Note: for AEC-Q100 automotive qualification, consider PIC18F46K20-I/ML with automotive-grade marking or migrate to PIC18F46K22 Q-series variants.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC18F46K20-I/ML — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC18F46K22-I/ML | PIC18F45K22-I/ML | PIC18F46J13-I/ML | PIC18F46K20-I/PT | PIC18F46Q10-I/ML |
|---|---|---|---|---|---|---|
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN - same footprint | 44-TQFP - same pinout, different package | 44-QFN - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 32 KB (-50%) | 64 KB | 64 KB | 64 KB |
| SRAM | 3936 bytes | 3896 bytes | 1536 bytes (-61%) | 3936 bytes | 3936 bytes | 3612 bytes |
| Operating Frequency | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 48 MHz / 12 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
| Supply Voltage | 4.2 V - 5.5 V | 4.2 V - 5.5 V | 4.2 V - 5.5 V | 2.0 V - 3.6 V (different range) | 4.2 V - 5.5 V | 4.2 V - 5.5 V |
| I/O Pins | 36 | 36 | 36 | 34 | 36 | 36 |
| ADC Channels / Resolution | 14 / 10-bit | 28 / 10-bit | 28 / 10-bit | 13 / 10-bit | 14 / 10-bit | 24 / 10-bit |
주요 차별점
- 64 KB Flash in 44-QFN with nanoWatt XLP for true sub-uA sleep (vs PIC18F45K22-I/ML)
- 5 V native operation matches industrial 24 V rail designs (vs PIC18F46J13-I/ML)
- Established PIC18 K20 family with mature toolchain and reference designs (vs PIC18F46Q10-I/ML)
설계 노트
Per the Microchip PIC18F2XK20/4XK20 datasheet, place a 0.1 uF decoupling capacitor within 5 mm of every VDD pin (the K20 has 3 VDD pins on the 44-QFN), plus a single 10 uF bulk capacitor on the AVSS/AVDD analog rail. For nanoWatt XLP designs, the VREF+ pin requires 10 nF-100 nF bypass if the internal 1.2 V Fixed Voltage Reference is enabled. Power-on reset and brown-out reset must be enabled via CONFIG registers to prevent code execution during unstable supply ramps.
The 44-pin QFN (8x8 mm) package features an exposed thermal pad on the underside that MUST be soldered to a continuous ground copper pour of at least 1 square inch for proper thermal and electrical performance. Without the thermal pad soldered, the die's theta_JA rises dramatically and the device may overheat under sustained 64 MHz operation. Use multiple thermal vias (8-12, 0.3 mm drill) under the pad to spread heat into inner PCB layers. QFN hand-soldering requires hot-air rework or precision stencil-printed reflow.
Layout guidance for the PIC18F46K20 QFN: keep the analog AVSS/AVDD traces short and isolated from digital switching traces; place the ADC input traces away from the EUSART and PWM signals to minimize crosstalk. The 16 MHz external crystal (if used) requires short symmetric traces with a ground guard ring and load capacitors within 5 mm of the OSC1/OSC2 pins. The ICSP pins (RB6/PGD, RB7/PGC) need test-point access for in-circuit programming and debugging. Leave 0.5 mm clearance around the QFN perimeter to avoid solder bridges.
Common pitfalls when using PIC18F46K20-I/ML: (1) Forgetting to disable the watchdog timer in CONFIG1 for debug builds, causing spurious resets; (2) Configuring the ADC without the required acquisition time, leading to inaccurate conversions; (3) Driving the analog comparator output pin as a digital output, which can damage the comparator; (4) Forgetting that MSSP and EUSART pin assignments differ between K20 and K22 - check the datasheet pinout tables before migrating firmware; (5) Exceeding 25 mA per I/O pin (source or sink) when driving LEDs directly - use a transistor driver for high-current loads.
For nanoWatt XLP applications targeting sub-uA sleep current, place the secondary 32.768 kHz crystal (SOSCI/SOSCO) on RC1/RC0 with a ground guard ring and minimal trace length. Avoid routing digital signals under the crystal traces to prevent coupling. Enable the RTCC with the secondary oscillator as clock source for accurate periodic wake-ups. Keep any unused I/O pins configured as outputs driving low (or inputs with weak pull-ups enabled) to minimize leakage current during sleep.
규정 준수 정보
RoHS compliant per Microchip product page. Industrial -40C to +85C temperature grade (I suffix). Not AEC-Q100 qualified - choose automotive-grade K22 or Q10 variants for vehicle applications. Conflict-minerals compliant per Microchip supply-chain disclosures.
