PIC18LF43K22T-I/PT - 8KB Flash 8-bit MCU 64MHz XLP 44-TQFP
MPN: PIC18LF43K22T-I/PT ✓ Hoạt độngPIC18LF43K22T-I/PT Tóm tắt
An 8-bit microcontroller (MCU) is a small, single-chip computer that integrates a CPU, non-volatile program memory, RAM, peripherals, and I/O into one package, designed for embedded control tasks. Within the semiconductor taxonomy, MCUs sit under microcontrollers -> embedded processors -> digital ICs. PIC18 devices use a modified Harvard RISC architecture with 16-bit opcodes and 8-bit data, allowing single-cycle instruction execution and deterministic interrupt response ideal for real-time control.
Key features include 3968 bytes of SRAM, 256 bytes of EEPROM data memory, two Enhanced USART modules, two MSSP (SPI/I2C) peripherals, a 12-bit A/D converter with up to 30 channels, and multiple 16-bit timers. The nanoWatt XLP technology delivers typical sleep currents below 100 nA with RTC and watchdog operating, making this device suitable for battery-powered applications. The 44-TQFP package is the standard surface-mount option for the PIC18F43K22 family and offers generous I/O expansion versus the 28- and 40-pin siblings.
The architecture uses a 16-bit instruction word with 8-bit data path and 31-level hardware stack, with a priority-level interrupt controller supporting both edge and level-sensitive external interrupts. CIP (Core Independent Peripherals) features include the 16-bit PWM, configurable logic cells, and zero-cross detection, allowing event-driven tasks to run without CPU intervention for power savings.
Typical applications include industrial sensor nodes, low-power IoT endpoints, portable consumer products, energy-harvesting devices, and battery-backed instrumentation. The wide peripheral set also makes it useful in human-machine interface (HMI) panels and small motor-control boards where deterministic timing is required.
When designing with the PIC18LF43K22, observe the LF voltage range: 1.8 V minimum for program execution but 2.0 V minimum for full Flash programming, and 3.6 V absolute maximum. Place decoupling capacitors (100 nF plus 1 uF) within 5 mm of VDD/AVDD/VSS pins, and route the MCLR line with a 10 kΩ pull-up if not driven by the debugger.
This page synthesizes distributor pricing, verified drop-in alternatives from the same PIC18LF43K22 family, and practical design notes not found on the manufacturer product page.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF43K22T-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 PIC18LF43K22T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, ADC, MSL Level, I/O Pins, Timers.
PIC18LF43K22-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F43K22-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF45K22-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF43K22-E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF26K22T-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF43K22T-I/PT Tỷ lệ tối đa & tính chất điện
| Core | PIC18 (8-bit RISC, modified Harvard) |
| Family | PIC® XLP™ 18K |
| Program Memory (Flash) | 8 KB (4K x 16) |
| Data SRAM | 3968 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 64 MHz |
| Instruction Throughput | 16 MIPS |
| Supply Voltage (LF) | 1.8 V to 3.6 V (typical 2.5 V / 3.3 V) |
| I/O Pins | 36 |
| ADC | 12-bit, up to 30 channels |
| Enhanced USART | 2 modules |
| MSSP (SPI / I2C) | 2 modules |
| Timers (8-bit / 16-bit) | Multiple 16-bit and 8-bit |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp | 44-pin TQFP (10x10 mm) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF43K22T-I/PT
| Chân 1 | MCLR — Master Clear (reset) input, active low; tie to VDD via 10kΩ |
| Chân 2 | RA0 — PORTA bit 0 / analog input |
| Chân 3 | RA1 — PORTA bit 1 / analog input |
| Chân 4 | RA2 — PORTA bit 2 / analog input |
| Chân 5 | RA3 — PORTA bit 3 / analog input |
| Chân 6 | RA4 — PORTA bit 4 / analog input |
| Chân 7 | RA5 — PORTA bit 5 / analog input |
| Chân 8 | RA6 — PORTA bit 6 / analog input |
| Chân 9 | RA7 — PORTA bit 7 / analog input |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VSS — Ground reference |
| Chân 12 | OSC1 — Crystal oscillator input |
| Chân 13 | OSC2 — Crystal oscillator output |
| Chân 14 | VDD — Positive supply voltage (1.8-3.6 V) |
| Chân 15 | RB0 — PORTB bit 0 / interrupt-on-change |
| Chân 16 | RB1 — PORTB bit 1 / interrupt-on-change |
| Chân 17 | RB2 — PORTB bit 2 / interrupt-on-change |
| Chân 18 | RB3 — PORTB bit 3 / interrupt-on-change |
| Chân 19 | RB4 — PORTB bit 4 / interrupt-on-change |
| Chân 20 | RB5 — PORTB bit 5 / interrupt-on-change |
| Chân 21 | RB6 — PORTB bit 6 / ICSPCLK |
| Chân 22 | RB7 — PORTB bit 7 / ICSPDAT |
| Chân 23 | RC0 — PORTC bit 0 / analog input |
| Chân 24 | RC1 — PORTC bit 1 / analog input |
| Chân 25 | RC2 — PORTC bit 2 / analog input / PWM |
| Chân 26 | RC3 — PORTC bit 3 / analog input / PWM |
| Chân 27 | RC4 — PORTC bit 4 / analog input / SDA |
| Chân 28 | RC5 — PORTC bit 5 / analog input / SCL |
| Chân 29 | RC6 — PORTC bit 6 / TX / analog input |
| Chân 30 | RC7 — PORTC bit 7 / RX / analog input |
| Chân 31 | VSS — Ground reference |
| Chân 32 | VDD — Positive supply voltage (1.8-3.6 V) |
| Chân 33 | RD0 — PORTD bit 0 |
| Chân 34 | RD1 — PORTD bit 1 |
| Chân 35 | RD2 — PORTD bit 2 |
| Chân 36 | RD3 — PORTD bit 3 |
| Chân 37 | RD4 — PORTD bit 4 |
| Chân 38 | RD5 — PORTD bit 5 |
| Chân 39 | RD6 — PORTD bit 6 |
| Chân 40 | RD7 — PORTD bit 7 |
| Chân 41 | RE0 — PORTE bit 0 / analog input |
| Chân 42 | RE1 — PORTE bit 1 / analog input |
| Chân 43 | RE2 — PORTE bit 2 / analog input |
| Chân 44 | RE3 — PORTE bit 3 / analog input |
Ứng dụng tiêu biểu
PIC18LF43K22T-I/PT phù hợp cho 7 Áp dụngs: Battery-Powered IoT Sensor Node, Industrial Sensor Interface Module, Portable Consumer Electronics, Energy-Harvesting Wireless Switch, Battery-Backed Security Panel, Automotive Body Electronics (Non-Safety), Medical Wearable Monitor.
Battery-Powered IoT Sensor Node
The PIC18LF43K22T-I/PT is engineered for battery-powered IoT sensor nodes that demand long sleep durations and infrequent wake-and-transmit events. The nanoWatt XLP core delivers typical sleep currents below 100 nA with RTCC and watchdog running, allowing a coin-cell sensor node to operate for multiple years on a single CR2032. The 64 MHz CPU supports 16 MIPS throughput, so the device can wake, sample a sensor over I2C or SPI, process data, transmit on an Enhanced USART, and return to sleep within milliseconds. The 8 KB Flash and 3968 bytes of SRAM are sufficient for a small RTOS or state-machine control loop. The wide 1.8 V to 3.6 V supply range allows direct connection to single-cell Li-ion, 2xAA alkaline, or 3.3 V regulated rails. Recommended companion: MRF89XA sub-GHz transceiver, MCP9808 temperature sensor, MCP1640 boost regulator.
Được đề xuất
Industrial Sensor Interface Module
The PIC18LF43K22T-I/PT suits industrial sensor interface modules that need to aggregate analog signals, run a small PID loop, and forward values to a PLC over RS-485. The 12-bit ADC with up to 30 channels (28-channel differential mode available) handles multi-input modules with built-in acquisition timing. The two Enhanced USART peripherals support RS-232, RS-485, and LIN bus protocols simultaneously. The 8 KB Flash accommodates control tables and small Modbus-RTU command parsers. The industrial -40C to +85C rating plus robust ESD and EMI characteristics inherited from the K22 family make this device a reliable choice for factory-floor use. Recommended companions: MAX3485 RS-485 transceiver, MCP6002 op-amp front-end, TVS diode array.
Được đề xuất
Portable Consumer Electronics
Portable consumer products like e-readers, fitness bands, and small handheld instruments benefit from the PIC18LF43K22T-I/PT combination of low power, moderate Flash, and rich peripheral set. The 12-bit ADC supports battery monitoring, while the 16-bit PWM drives motor control or backlight dimming. The MSSP peripherals provide I2C or SPI to display controllers, EEPROMs, and accelerometers. The 44-pin TQFP gives 36 I/O lines, ample for button matrix scanning, rotary encoder inputs, and segment-style LCD control with an external charge pump. nanoWatt XLP sleep keeps the device in idle states for months on a partial charge. Recommended companions: SSD1306 OLED controller, MPU-6050 IMU, MCP73831 Li-Ion charger.
Được đề xuất
Energy-Harvesting Wireless Switch
The PIC18LF43K22T-I/PT is well-matched to energy-harvesting wireless switches and remote controls where the MCU must boot from a few microjoules of harvested energy, transmit a packet, and return to sleep. nanoWatt XLP technology with deep sleep current below 100 nA means the device can wake, run, and re-sleep on less than the charge stored in a 0.1 uF capacitor. The Enhanced USART connects to sub-GHz transceivers for EnOcean-style or proprietary wireless protocols. The PIC18LF43K22T-I/PT supports 8 KB Flash - adequate for energy-management code, AES-128 lightweight encryption, and remote-pairing routines. The 44-TQFP footprint accommodates a small RF shield. Recommended companions: EPCOS piezo harvester, MAX14720 energy-harvest PMIC, TI CC1101 sub-GHz transceiver.
Được đề xuất
Battery-Backed Security Panel
Security alarm panels, smoke detectors, and intrusion-detection sensors rely on always-on reliability, and the PIC18LF43K22T-I/PT delivers on both fronts. nanoWatt XLP technology with brown-out reset and watchdog timer ensures long battery life with autonomous fault recovery. The 256-byte EEPROM stores user configuration, zone identifiers, and event logs without wearing out Flash. The MSSP modules connect to keypad matrix scanners, ZigBee/Z-Wave modules for the card control panel, or EEPROM for non-volatile event storage. The 12-bit ADC handles battery monitoring and analog sensor inputs for smoke or CO detection. Industrial temperature range supports unheated installations. Recommended companions: MCP79410 RTC with battery backup, MRF24J40 802.15.4 transceiver, piezo buzzer driver.
Được đề xuất
Automotive Body Electronics (Non-Safety)
While the PIC18LF43K22T-I/PT is industrial-grade, the LF variant can serve non-safety automotive applications such as interior lighting controllers, seat-position memory modules, and HVAC panel controls in 12 V body-electronics subsystems. The wide ADC channel count supports multiplexed backlighting, button matrix, and temperature sensors. The Enhanced USART handles LIN bus communication with body-control modules. The 8 KB Flash fits typical seat-memory or lighting-state-machine code. For safety-critical automotive use, however, migrate to a PIC18F family member with explicit Q-100 qualification rather than this industrial-grade device. Recommended companions: TJA1027 LIN transceiver, MCP25625 CAN-FD transceiver (for CAN-bus variants), LM4040 voltage reference.
Được đề xuất
Medical Wearable Monitor
Medical wearables like fitness bands, continuous glucose monitor patches, and pulse oximeters can leverage the PIC18LF43K22T-I/PT for low-power biosignal processing. The 12-bit ADC digitizes photoplethysmography (PPG), ECG, or galvanic skin response signals at moderate sample rates. The nanoWatt XLP core keeps total average current below 1 mA for multi-day wearable battery life. The MSSP peripheral drives SPI displays and I2C biosensors (such as the MAX30102 heart-rate sensor). The 8 KB Flash accommodates heart-rate-detection algorithms and BLE pairing state machines. The 1.8 V minimum VDD enables direct operation from single-cell alkaline or silver-oxide coin batteries. Recommended companions: MAX30102 PPG sensor, MCP73831 Li-Ion charger (for rechargeable designs), nRF8001 BLE module.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF43K22T-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 | PIC18LF43K22-I/PT | PIC18F43K22-I/PT | PIC18LF45K22-I/PT | PIC18LF43K22-E/P | PIC18LF26K22T-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 | TQFP-44 - same | TQFP-44 - same | TQFP-44 - same | TQFP-44 - same | TQFP-44 - same |
| Core / Family | PIC18 XLP 18K | PIC18 XLP 18K (same) | PIC18 XLP 18K (same) | PIC18 XLP 18K (same) | PIC18 XLP 18K (same) | PIC18 XLP 18K (same) |
| Program Memory (Flash) | 8 KB | 8 KB (same) | 8 KB (same) | 32 KB (+300%) | 8 KB (same) | 64 KB (+700%) |
| Data SRAM | 3968 bytes | 3968 bytes (same) | 3968 bytes (same) | 1536 bytes (-61%) | 3968 bytes (same) | 3896 bytes (similar) |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V (same) | 1.8 V to 5.5 V (wider) | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V (same) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) | -40C to +125C (extended) | -40C to +85C (same) |
| Maximum Frequency | 64 MHz (16 MIPS) | 64 MHz (same) | 64 MHz (same) | 64 MHz (same) | 64 MHz (same) | 64 MHz (same) |
| I/O Pins | 36 | 36 (same) | 36 (same) | 54 (+50%) | 36 (same) | 24 (-33%) |
Bảo phân biệt quan trọng
- Wide industrial -40C to +85C operation in the 44-pin TQFP (vsPIC18LF43K22-I/P (PDIP-40))
- Low-voltage LF operation optimized for battery designs (vsPIC18F43K22-I/PT (F variant))
- Mature, mainstream XLP silicon with extensive library support (vsPIC18LF27K42-I/SS (newer K42 family))
Ghi chú thiết kế
Estimated: at 64 MHz and 3.3 V, the PIC18LF43K22T-I/PT typically draws 8-12 mA active. To meet nanoWatt XLP specifications for battery life, use Sleep mode with RTCC and watchdog running - this drops current to ~100 nA. Decoupling must include 100 nF plus 1 uF ceramic placed within 5 mm of VDD/AVDD/VSS pins; the LF variant is sensitive to brown-out events when VDD falls below 1.8 V, so add a low-ESR bulk capacitor if the source is a switching regulator.
Route the 44-pin TQFP with 0.4 mm traces between pads and place a continuous ground plane on the bottom layer. The MCLR pin requires a 10 kΩ pull-up to VDD and a 100 nF capacitor to ground for ICSP programming; route the ICSPCLK/ICSPDAT pins (RB6/RB7) close to the ICSP header. Keep oscillator traces short and surround them with ground; avoid routing noisy switching signals beneath the crystal.
Do not exceed 3.6 V on the LF variant - the PIC18LF43K22T-I/PT does not have 5 V tolerance like the F-suffix counterpart. Configure CONFIG1L and CONFIG1H for LF crystal modes if the system runs below 2.0 V. Watch for ADC input leakage above 1 uA if analog signals exceed VDD by more than 0.3 V. When migrating code from PIC18F43K22 to PIC18LF43K22, confirm that the brown-out voltage and oscillator settings remain valid for the LF voltage range.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page; industrial temperature grade (-40C to +85C); AEC-Q100 not applicable - this is not an automotive-qualified part. For automotive applications use PIC18F or PIC18J Q-100 variants instead.