PIC18LF43K22T-I/PT - 8KB Flash 8-bit MCU 64MHz XLP 44-TQFP
料号： PIC18LF43K22T-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.58 | $25.80 |
| 100 | $2.21 | $221.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.68 | $1,680.00 |
PIC18LF43K22T-I/PT 概述
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.
直接替换替代料： PIC18LF43K22T-I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18LF43K22T-I/PT （相同外形与封装尺寸） ——差异在于 Package, ADC, MSL Level, I/O Pins, Timers.
快速对比工具——选择替代料号进行并排对比：
PIC18LF43K22-I/PT
✅ 直接替换✓ 有现货
$1.85 / 个
查看数据手册 →PIC18F43K22-I/PT
✅ 直接替换✓ 有现货
$1.95 / 个
查看数据手册 →PIC18LF45K22-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF43K22-E/P
✅ 直接替换✓ 有现货
$1.74 / 个
查看数据手册 →PIC18LF26K22T-I/SO
✅ 直接替换✓ 有现货
$2.55 / 个
查看数据手册 →PIC18LF43K22T-I/PT 最大额定值与电气特性
| 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 |
| 工作温度 | -40C to +85C (Industrial) |
| 封装 | 44-pin TQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| MSL 等级 | 3 |
| RoHS 状态 | Compliant |
PIC18LF43K22T-I/PT 引脚配置
| 引脚 1 | MCLR — Master Clear (reset) input, active low; tie to VDD via 10kΩ |
| 引脚 2 | RA0 — PORTA bit 0 / analog input |
| 引脚 3 | RA1 — PORTA bit 1 / analog input |
| 引脚 4 | RA2 — PORTA bit 2 / analog input |
| 引脚 5 | RA3 — PORTA bit 3 / analog input |
| 引脚 6 | RA4 — PORTA bit 4 / analog input |
| 引脚 7 | RA5 — PORTA bit 5 / analog input |
| 引脚 8 | RA6 — PORTA bit 6 / analog input |
| 引脚 9 | RA7 — PORTA bit 7 / analog input |
| 引脚 10 | VSS — Ground reference |
| 引脚 11 | VSS — Ground reference |
| 引脚 12 | OSC1 — Crystal oscillator input |
| 引脚 13 | OSC2 — Crystal oscillator output |
| 引脚 14 | VDD — Positive supply voltage (1.8-3.6 V) |
| 引脚 15 | RB0 — PORTB bit 0 / interrupt-on-change |
| 引脚 16 | RB1 — PORTB bit 1 / interrupt-on-change |
| 引脚 17 | RB2 — PORTB bit 2 / interrupt-on-change |
| 引脚 18 | RB3 — PORTB bit 3 / interrupt-on-change |
| 引脚 19 | RB4 — PORTB bit 4 / interrupt-on-change |
| 引脚 20 | RB5 — PORTB bit 5 / interrupt-on-change |
| 引脚 21 | RB6 — PORTB bit 6 / ICSPCLK |
| 引脚 22 | RB7 — PORTB bit 7 / ICSPDAT |
| 引脚 23 | RC0 — PORTC bit 0 / analog input |
| 引脚 24 | RC1 — PORTC bit 1 / analog input |
| 引脚 25 | RC2 — PORTC bit 2 / analog input / PWM |
| 引脚 26 | RC3 — PORTC bit 3 / analog input / PWM |
| 引脚 27 | RC4 — PORTC bit 4 / analog input / SDA |
| 引脚 28 | RC5 — PORTC bit 5 / analog input / SCL |
| 引脚 29 | RC6 — PORTC bit 6 / TX / analog input |
| 引脚 30 | RC7 — PORTC bit 7 / RX / analog input |
| 引脚 31 | VSS — Ground reference |
| 引脚 32 | VDD — Positive supply voltage (1.8-3.6 V) |
| 引脚 33 | RD0 — PORTD bit 0 |
| 引脚 34 | RD1 — PORTD bit 1 |
| 引脚 35 | RD2 — PORTD bit 2 |
| 引脚 36 | RD3 — PORTD bit 3 |
| 引脚 37 | RD4 — PORTD bit 4 |
| 引脚 38 | RD5 — PORTD bit 5 |
| 引脚 39 | RD6 — PORTD bit 6 |
| 引脚 40 | RD7 — PORTD bit 7 |
| 引脚 41 | RE0 — PORTE bit 0 / analog input |
| 引脚 42 | RE1 — PORTE bit 1 / analog input |
| 引脚 43 | RE2 — PORTE bit 2 / analog input |
| 引脚 44 | RE3 — PORTE bit 3 / analog input |
典型应用
PIC18LF43K22T-I/PT 适用于 7 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： PIC18LF43K22T-I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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%) |
关键差异点
- Wide industrial -40C to +85C operation in the 44-pin TQFP （对比 PIC18LF43K22-I/P (PDIP-40))
- Low-voltage LF operation optimized for battery designs （对比 PIC18F43K22-I/PT (F variant))
- Mature, mainstream XLP silicon with extensive library support （对比 PIC18LF27K42-I/SS (newer K42 family))
设计说明
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.
合规信息
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.