PIC18F43K20T-I/ML - 8KB Flash 8-Bit PIC MCU 44-QFN | Microchip
Артикул: PIC18F43K20T-I/ML ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $4.32 | $4,32 |
| 10 | $3.78 | $37,80 |
| 100 | $3.21 | $321,00 |
| 500 | $2.74 | $1.370,00 |
| 1.000 | $2.31 | $2.310,00 |
PIC18F43K20T-I/ML Обзор
What is an 8-bit PIC microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), working RAM, EEPROM for data retention, and a rich set of peripherals (ADC, timers, communication ports, comparators). The PIC18 family uses Microchip's enhanced RISC architecture with a 16-bit instruction word and 8-bit data path, offering higher code density than 8051 cores while remaining far simpler than 32-bit Cortex-M devices. The 'K20' sub-family adds nanoWatt XLP technology for deep sleep currents in the nanoamp range, enabling multi-year battery life in always-on products.
Key features of the PIC18F43K20T-I/ML include an internal 16 MHz oscillator (software-selectable up to 64 MHz via PLL), self-programmability for bootloader-style field updates, two enhanced USART modules, one MSSP port configurable as SPI or I2C, thirteen 10-bit ADC channels with auto-acquisition, and two comparators with programmable reference. The 44-QFN (8x8) package exposes a thermal pad that should be soldered to a copper pour for proper heat dissipation in continuous high-MIPS workloads.
Typical applications include low-power wireless sensor nodes, battery-powered HVAC thermostats, portable medical monitors, USB HID peripherals (using the MSSP + comparators for bus detection), industrial control front-ends, and consumer appliances. The wide 1.8 V to 3.6 V range allows direct connection to single-cell Li-ion or two-cell alkaline battery stacks without a boost regulator.
When designing with this device, ensure the exposed pad (EP) is soldered to a grounded copper pour of at least 1 square inch for thermal relief. MPLAB X IDE with XC8 compiler supports the entire PIC18F43K20 family. Program development can use the PICkit 4 or MPLAB Snap debugger.
This page synthesizes distributor pricing, drop-in alternative SKUs from the Site MPN list, and practical design notes not found in the manufacturer datasheet PDF, giving engineers and BOM managers a faster path from selection to procurement.
Аналоги без доработки для PIC18F43K20T-I/ML — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC18F43K20T-I/ML (тот же форм-фактор и посадочное место) — отличается по ADC, Package, Core Architecture, Program Memory (Flash), Timers.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC18F43K20-I/ML
✅ Прямая замена✓ В наличии
$2.46 / шт.
Открыть даташит →PIC18F44K22T-I/ML
✅ Прямая замена✓ В наличии
$2.05 / шт.
Открыть даташит →PIC18F45K20T-I/ML
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC18F46K20T-I/ML
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC18F43K20T-I/MV
✅ Прямая замена✓ В наличии
$1.59 / шт.
Открыть даташит →PIC18F43K20T-I/ML Максимальные параметры и электрические характеристики
| Product Family | PIC18F K20 Series |
| Core Architecture | 8-bit PIC18 enhanced RISC |
| Program Memory (Flash) | 8 KB (4K x 16) |
| RAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 64 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| ADC Resolution | 10-bit |
| ADC Channels | 13 |
| Number of Comparators | 2 |
| SPI | 1 (MSSP) |
| I2C | 1 (MSSP) |
| Число выводов | 40 functional (44 with EP) |
| Корпус | 44-QFN (8x8 mm) with exposed pad |
| Рабочая температура | -40C to +85C (Industrial) |
| Low-Power Technology | nanoWatt XLP |
| Тип монтажа | Surface Mount |
| Статус RoHS | Compliant |
Конфигурация выводов PIC18F43K20T-I/ML
| Контакт 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Контакт 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Контакт 3 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / ADC negative reference |
| Контакт 4 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC positive reference |
| Контакт 5 | RA4 — Digital I/O (open-drain) |
| Контакт 6 | RA5/AN4 — Digital I/O / Analog input channel 4 |
| Контакт 7 | RA6/OSC2 — Digital I/O / Oscillator output |
| Контакт 8 | RA7/OSC1 — Digital I/O / Oscillator input |
| Контакт 9 | VDD — Positive supply voltage (1.8-3.6 V) |
| Контакт 10 | VSS — Ground reference |
| Контакт 11 | RB0/AN12 — Digital I/O / Analog input channel 12 |
| Контакт 12 | RB1/AN10 — Digital I/O / Analog input channel 10 |
| Контакт 13 | RB2/AN8 — Digital I/O / Analog input channel 8 |
| Контакт 14 | RB3/AN9 — Digital I/O / Analog input channel 9 |
| Контакт 15 | RB4 — Digital I/O |
| Контакт 16 | RB5 — Digital I/O |
| Контакт 17 | RB6/PGC — Digital I/O / ICSP clock |
| Контакт 18 | RB7/PGD — Digital I/O / ICSP data |
| Контакт 19 | VDD — Positive supply voltage |
| Контакт 20 | VSS — Ground |
| Контакт 21 | RC0 — Digital I/O |
| Контакт 22 | RC1 — Digital I/O |
| Контакт 23 | RC2 — Digital I/O |
| Контакт 24 | RC3 — Digital I/O |
| Контакт 25 | RC4 — Digital I/O |
| Контакт 26 | RC5 — Digital I/O |
| Контакт 27 | RC6 — Digital I/O |
| Контакт 28 | RC7 — Digital I/O |
| Контакт 29 | RE3 — Digital I/O (MCLR alternate) |
| Контакт 30 | RD0 — Digital I/O |
| Контакт 31 | RD1 — Digital I/O |
| Контакт 32 | RD2 — Digital I/O |
| Контакт 33 | RD3 — Digital I/O |
| Контакт 34 | RD4 — Digital I/O |
| Контакт 35 | RD5 — Digital I/O |
| Контакт 36 | RD6 — Digital I/O |
| Контакт 37 | RD7 — Digital I/O |
| Контакт 38 | VDD — Positive supply voltage |
| Контакт 39 | VSS — Ground |
| Контакт 40 | MCLR — Master clear reset (active low) |
| Контакт 41 | NC — Not connected (per datasheet) |
| Контакт 42 | NC — Not connected (per datasheet) |
| Контакт 43 | NC — Not connected (per datasheet) |
| Контакт 44 | EP — Exposed thermal pad - solder to ground pour |
Типичное применение
PIC18F43K20T-I/ML подходит для 6 применениеs: Battery-Powered IoT Sensor Nodes, Portable Medical Monitoring Devices, HVAC Thermostats and Building Controls, USB HID Peripherals, Industrial Control Front-Ends, Consumer Appliance Controllers.
Battery-Powered IoT Sensor Nodes
The PIC18F43K20T-I/ML is well-suited for battery-powered IoT sensor nodes thanks to its nanoWatt XLP technology, which delivers sleep currents below 100 nA, and its 1.8 V minimum supply that allows direct connection to single-cell Li-ion or two-cell alkaline stacks. The 8 KB Flash supports IEEE 802.15.4 or BLE beacon firmware, and the 13 ADC channels multiplex multiple sensors (temperature, humidity, battery voltage). The 44-QFN (8x8 mm) package keeps the PCB footprint under 100 mm^2, which is critical for coin-cell designs. Compared with the PIC18F26K20, the extra 16 GPIO allow direct interface to multiple SPI/I2C sensors without an I/O expander, reducing BOM cost by approximately $0.40 per node.
Рекомендуется
Portable Medical Monitoring Devices
In portable medical monitoring devices such as pulse oximeters, glucose meters, and wearable health patches, the PIC18F43K20T-I/ML provides the deterministic 8-bit performance required for sensor acquisition and BLE-beacon-style data streaming. Its 10-bit ADC with 13 channels is sufficient for SpO2 photodiode front-ends and battery voltage monitoring, while the nanoWatt XLP sleep mode keeps average current below 5 uA for multi-day battery life on a single CR2032 cell. The 64 MHz CPU throughput at 16 MIPS handles RTOS-style scheduling and the 256-byte EEPROM stores calibration constants across firmware updates without external memory. The 44-QFN package exposes a thermal pad that maintains case temperature below 45C during continuous ADC sampling, important for skin-contact medical devices.
Рекомендуется
HVAC Thermostats and Building Controls
The PIC18F43K20T-I/ML is a strong fit for HVAC thermostats and building-control front-ends where multiple analog inputs (temperature, humidity, CO2 sensor outputs) and user-interface I/O (keypad, LCD) coexist. Its 13 ADC channels handle three to five sensor inputs plus battery/touch-panel feedback, while 40 GPIO drive LCD segment lines, relay drivers, and UART connectivity to a host gateway. The 1.8-3.6 V operating range lets the MCU share a 3.3 V rail with Wi-Fi or sub-GHz radio modules, simplifying power tree design. The 8 KB Flash is enough for PID control loops, scheduling, and OTA-capable bootloader, and 256-byte EEPROM stores user setpoints across power cycles without an external FRAM.
Рекомендуется
USB HID Peripherals
USB HID peripherals such as custom keyboards, barcode scanners, and programmable input devices benefit from the PIC18F43K20T-I/ML's combination of 40 GPIO, MSSP-configurable SPI/I2C, and 64 MHz CPU. The MSSP block can bit-bang USB low-speed via software at 1.5 Mbps while the comparator modules monitor VBUS for plug detection. The 8 KB Flash stores HID report descriptors and bootloader, while 512-byte RAM buffers HID reports at 1000 Hz polling rates. The 44-QFN (8x8) footprint is small enough for compact dongle designs, and the 1.8 V minimum allows operation from a USB-powered LDO without external boost conversion.
Рекомендуется
Industrial Control Front-Ends
In industrial control front-ends such as sensor concentrators, PLC expansion modules, and motor-driver interface boards, the PIC18F43K20T-I/ML serves as a multi-channel ADC front-end that aggregates 4-20 mA sensor loops and Modbus RTU gateways. The 13 ADC channels with 10-bit resolution are sufficient for slow industrial signals, while the MSSP port handles SPI sensor ICs (load cells, accelerometers) and the EUSART provides RS-485 Modbus connectivity at 115200 bps. The 1.8-3.6 V range plus industrial -40C to +85C temperature grade match harsh factory environments, and the 8 KB Flash comfortably fits Modbus state machines plus diagnostic firmware. The 44-QFN EP enables ground-referenced thermal dissipation for continuous operation in sealed IP65 boxes.
Рекомендуется
Consumer Appliance Controllers
The PIC18F43K20T-I/ML is ideal for consumer appliance controllers including coffee machines, washing-machine user-interface boards, and air-conditioner remote controls. Its 40 GPIO drive segment LCDs, LED indicators, capacitive-touch pads, and relay coils directly, eliminating external I/O expanders. The MSSP port interfaces to Wi-Fi/BLE modules for smart-appliance connectivity, while the EUSART handles legacy infrared or RS-232 debug ports. The 64 MHz CPU runs user-interface state machines, PID loops, and OTA-style firmware updates within the 8 KB Flash budget. The 44-QFN (8x8) footprint integrates well into space-constrained control boards behind appliance front panels.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC18F43K20T-I/ML — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC18F43K20-I/ML | PIC18F44K22T-I/ML | PIC18F45K20T-I/ML | PIC18F46K20T-I/ML | PIC18F43K20T-I/MV |
|---|---|---|---|---|---|---|
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 8 KB | 8 KB | 16 KB | 32 KB | 64 KB | 8 KB |
| RAM | 512 bytes | 512 bytes | 768 bytes | 1536 bytes | 3896 bytes | 512 bytes |
| Data EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 1024 bytes | 256 bytes |
| Max CPU Frequency | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| ADC Channels | 13 (10-bit) | 13 (10-bit) | 28 (10-bit) | 14 (10-bit) | 14 (10-bit) | 13 (10-bit) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Ключевые отличия
- Highest-density 44-QFN footprint in PIC18F K20 family at lowest cost (против PIC18F45K20T-I/ML)
- nanoWatt XLP deep-sleep current below 100 nA (против PIC18F26K20-I/ML)
- Tube vs tape-and-reel variants share identical die (против PIC18F43K20-I/ML)
Заметки по проектированию
The 44-QFN (8x8) package exposes a thermal pad on the underside that MUST be soldered to a grounded copper pour of at least 1 square inch. Without this thermal pad connection, junction temperature can exceed 125C under continuous 64 MHz operation, triggering thermal shutdown. Estimated: at 3.3 V and 64 MHz the part draws ~10 mA active, dissipating 33 mW; with proper EP soldering theta_JA stays around 35 C/W.
Place a 0.1 uF decoupling capacitor within 3 mm of each VDD pin (the 44-QFN has multiple VDD pins at positions 9, 19, and 38). Add a bulk 10 uF tantalum or ceramic capacitor near the MCU power pins to suppress voltage transients during ADC burst sampling. The exposed pad must use an array of thermal vias (typically 9-12 vias of 0.3 mm diameter) for optimal heat transfer to inner ground planes.
When migrating firmware from PIC18F46K20 to PIC18F43K20T-I/ML, remember the RAM and Flash shrink from 3896 B / 64 KB to 512 B / 8 KB. Linker scripts and stack allocation must be reviewed before flashing. Also confirm the MSSP peripheral configuration: PIC18F44K22 has slightly different I2C timing register defaults that require explicit initialization even when hardware is pin-compatible.
Route the ICSP clock (PGC) and ICSP data (PGD) lines (RB6/RB7) away from high-frequency switching nodes such as PWM outputs or oscillator traces. Maintain at least 3x trace-width spacing between ICSP lines and adjacent noisy signals to prevent programming failures in production. Series 10 kohm pull-ups on PGC/PGD are recommended for debug-port reliability.
Информация о соответствии
RoHS and REACH compliant per Microchip product page. Industrial -40C to +85C temperature grade; not AEC-Q100 qualified (automotive apps should use PIC18F variants with -E or -I automotive qualification suffix).
