PIC18LF43K22-E/PT - 8KB Flash 8-bit MCU 44-TQFP | Microchip
料号： PIC18LF43K22-E/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.85 | $38.50 |
| 100 | $3.42 | $342.00 |
| 500 | $3.05 | $1,525.00 |
| 1,000 | $2.74 | $2,740.00 |
PIC18LF43K22-E/PT 概述
An 8-bit microcontroller (MCU) is a small computer-on-a-chip containing a CPU, memory, and peripherals on a single die. Within the broader taxonomy, the PIC18LF43K22 belongs to the PIC18 family (8-bit RISC cores), which is a sub-family of Microchip's PIC microcontroller portfolio. It is classified as a low-power (LF), general-purpose MCU, sitting between simple 8-bit controllers (PIC16) and higher-pin-count PIC18 variants. This hierarchy matters because the PIC18 core architecture delivers enhanced instruction set, C-compiler friendly design, and nanoWatt XLP technology for ultra-low-power operation.
Key features include nanoWatt XLP technology for sub-uA sleep currents, an integrated 12-bit ADC with up to 28 channels, multiple communication peripherals (EUSART, MSSP SPI/I2C), and 36 digital I/O pins. The device supports industrial temperature range (-40C to +125C) and is qualified to Microchip's industrial reliability standards.
The PIC18LF43K22 uses a 16-bit instruction word with Harvard architecture, achieving up to 16 MIPS performance at 64 MHz CPU clock. The advanced peripheral set includes motor-control PWMs, comparators, and capacitive touch sensing support via the mTouch peripheral framework.
Typical applications include portable medical devices, IoT sensor nodes, industrial sensor hubs, low-power remote controls, battery management systems, and consumer appliances where sleep-mode current budget is critical.
When designing with this device, ensure the supply voltage stays within the 1.8V-3.6V LF range; for 5V systems use the PIC18F43K22 variant instead. The ICSP programming interface requires dedicated pins that must not be repurposed without disabling in-circuit programming.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated in the Microchip datasheet PDF.
直接替换替代料： PIC18LF43K22-E/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： PIC18LF43K22-E/PT （相同外形与封装尺寸） ——差异在于 Package, ADC, Operating Temperature, Timers, Program Memory (Flash).
快速对比工具——选择替代料号进行并排对比：
PIC18LF43K22-E/P
✅ 直接替换✓ 有现货
$1.74 / 个
查看数据手册 →PIC18LF43K22-E/MV
✅ 直接替换✓ 有现货
$1.78 / 个
查看数据手册 →PIC18F43K22-E/PT
✅ 直接替换✓ 有现货
$2.18 / 个
查看数据手册 →PIC18LF46K22-E/PT
✅ 直接替换✓ 有现货
$3.15 / 个
查看数据手册 →PIC18LF45K22-E/PT
✅ 直接替换✓ 有现货
$2.38 / 个
查看数据手册 →PIC18LF44K22-E/PT
✅ 直接替换✓ 有现货
$1.7 / 个
查看数据手册 →PIC18LF43K22-E/PT 最大额定值与电气特性
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 8 KB |
| Data RAM | 3968 bytes |
| EEPROM | 256 bytes |
| Operating Voltage Range | 1.8 V to 3.6 V |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Digital I/O Pins | 36 |
| ADC | 12-bit, up to 28 channels |
| Comparators | 2 |
| Communication Peripherals | EUSART, MSSP (SPI/I2C) |
| 封装 | 44-pin TQFP (PT) 10x10 mm |
| 工作温度范围 | -40C to +125C (Industrial) |
| 安装类型 | Surface Mount |
| MSL 等级 | 3 (168 hours) |
| Lead-Free / RoHS | Lead-free, RoHS compliant |
| Low-Power Technology | nanoWatt XLP |
| ICSP Programming | Yes (In-Circuit Serial Programming) |
PIC18LF43K22-E/PT 引脚配置
| 引脚 1 | RA2/AN2 — Port A bit 2 / Analog input 2 |
| 引脚 2 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC positive reference |
| 引脚 3 | RA4/AN4 — Port A bit 4 / Analog input 4 |
| 引脚 4 | RA5/AN5 — Port A bit 5 / Analog input 5 |
| 引脚 5 | RA6 — Port A bit 6 |
| 引脚 6 | RA7 — Port A bit 7 |
| 引脚 7 | VSS — Ground reference |
| 引脚 8 | OSC1/CLKI/RA7 — Crystal oscillator input / External clock input |
| 引脚 9 | OSC2/CLKO/RA6 — Crystal oscillator output / Clock output |
| 引脚 10 | RC0 — Port C bit 0 |
| 引脚 11 | VDD — Positive supply voltage (1.8V-3.6V) |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | RB0/AN12 — Port B bit 0 / Analog input 12 |
| 引脚 14 | RB1/AN10 — Port B bit 1 / Analog input 10 |
| 引脚 15 | RB2/AN8 — Port B bit 2 / Analog input 8 |
| 引脚 16 | RB3/AN9 — Port B bit 3 / Analog input 9 |
| 引脚 17 | RB4/AN11 — Port B bit 4 / Analog input 11 |
| 引脚 18 | RB5/AN13 — Port B bit 5 / Analog input 13 |
| 引脚 19 | RB6/PGC — Port B bit 6 / ICSP clock |
| 引脚 20 | RB7/PGD — Port B bit 7 / ICSP data |
| 引脚 21 | RC1 — Port C bit 1 |
| 引脚 22 | RC2 — Port C bit 2 |
| 引脚 23 | RC3 — Port C bit 3 |
| 引脚 24 | RC4 — Port C bit 4 |
| 引脚 25 | RC5 — Port C bit 5 |
| 引脚 26 | RC6 — Port C bit 6 |
| 引脚 27 | RC7 — Port C bit 7 |
| 引脚 28 | RE3 — Port E bit 3 (MCLR by default) |
| 引脚 29 | RD0 — Port D bit 0 |
| 引脚 30 | RD1 — Port D bit 1 |
| 引脚 31 | VSS — Ground reference |
| 引脚 32 | VDD — Positive supply voltage (1.8V-3.6V) |
| 引脚 33 | RD2 — Port D bit 2 |
| 引脚 34 | RD3 — Port D bit 3 |
| 引脚 35 | RD4 — Port D bit 4 |
| 引脚 36 | RD5 — Port D bit 5 |
| 引脚 37 | RD6 — Port D bit 6 |
| 引脚 38 | RD7 — Port D bit 7 |
| 引脚 39 | RF0 — Port F bit 0 |
| 引脚 40 | RF1 — Port F bit 1 |
| 引脚 41 | RF2 — Port F bit 2 |
| 引脚 42 | RF3 — Port F bit 3 |
| 引脚 43 | RF4 — Port F bit 4 |
| 引脚 44 | RF5 — Port F bit 5 |
典型应用
PIC18LF43K22-E/PT 适用于 6 应用s: Portable Medical Devices, IoT Sensor Nodes, Industrial Sensor Hubs, Low-Power Remote Controls, Battery Management Systems, Consumer Appliances.
Portable Medical Devices
The PIC18LF43K22-E/PT suits battery-powered medical devices such as glucose meters, pulse oximeters, and portable diagnostic tools. Its nanoWatt XLP technology delivers sub-uA standby currents that extend coin-cell battery life by months, while the 12-bit ADC with up to 28 channels digitizes sensor signals (SpO2, temperature, glucose) with adequate resolution for clinical-grade measurements. The 1.8-3.6V supply range aligns directly with two AA or single lithium-cell chemistries. Compared to switching regulators, the LF MCU draws so little current that a linear post-regulator suffices, reducing BOM cost and PCB area in compact handheld enclosures.
推荐
IoT Sensor Nodes
For wireless sensor nodes transmitting temperature or humidity data over LoRa, BLE, or sub-GHz radio, the PIC18LF43K22-E/PT provides the lowest sleep current in the PIC18 LF family (per Microchip datasheet DS41412F). The MCU wakes on a timer interrupt, samples a sensor via the 12-bit ADC, transmits a packet, and returns to sleep within milliseconds. The EUSART and MSSP peripherals interface directly to popular radio modules. With 8 KB Flash and 3968 bytes RAM, the firmware fits comfortably in XC8 PRO mode without linker gymnastics.
推荐
Industrial Sensor Hubs
The PIC18LF43K22-E/PT's industrial temperature grade (-40C to +125C) and 36 digital I/O make it a fit for industrial sensor hubs that aggregate multiple 4-20 mA loops, thermistors, or digital sensors into a Modbus or CAN node. The MCU's 12-bit ADC and dual comparators handle analog conditioning while the EUSART implements RS-485 Modbus RTU communication. With nanoWart XLP, the hub can be field-powered from a 24V loop with a switching regulator plus the MCU in sleep mode most of the time, reducing average power below 100 uA.
推荐
Low-Power Remote Controls
Battery-powered remote controls for TVs, garage doors, or smart-home devices benefit from the PIC18LF43K22-E/PT's nanoWatt XLP sleep current and capacitive-touch sensing capability. The mTouch peripheral implements capacitive buttons without external components, while the EUSART or PWM drives an IR LED. With a CR2032 coin cell, the remote can operate 5-10 years on a single battery thanks to sub-uA standby. The 64 MHz CPU also enables debouncing, encryption, and rolling-code algorithms in C without timing pressure.
推荐
Battery Management Systems
The PIC18LF43K22-E/PT monitors individual cell voltages and temperatures in multi-cell battery packs for e-bikes, UPS systems, or solar storage. Its 12-bit ADC with 28 channels reads cell voltages through a resistive divider network, while the comparators provide over-voltage and under-voltage hardware interrupts independent of the CPU. The 1.8-3.6V supply range matches 2S-3S lithium chemistries directly. Sleep current below 1 uA preserves shelf life and idle storage, and the ICSP pins allow firmware updates via the battery management connector.
推荐
Consumer Appliances
The PIC18LF43K22-E/PT drives control panels in coffee machines, washing machines, or microwave ovens where capacitive touch buttons, LED indicators, and a small display must coexist with motor control. The mTouch peripheral eliminates mechanical buttons, the PWM drives brushed or BLDC motors via gate drivers, and the EUSART interfaces to a serial display. The industrial temperature grade handles the thermal environment of kitchen appliances, while the LF supply range simplifies isolated 3.3V rail design from mains.
推荐
推荐产品汇总
工程参考数据： PIC18LF43K22-E/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-E/P | PIC18LF43K22-E/MV | PIC18F43K22-E/PT | PIC18LF46K22-E/PT | PIC18LF45K22-E/PT | PIC18LF44K22-E/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Flash Memory | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB | 32 KB | 16 KB |
| Operating Voltage | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V | 2.3V to 5.5V | 1.8V to 3.6V | 1.8V to 3.6V | 1.8V to 3.6V |
| CPU Speed | 64 MHz (16 MIPS) | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Digital I/O Pins | 36 | 36 | 36 | 36 | 36 | 36 | 36 |
| Low-Power Technology | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP | nanoWatt XLP |
关键差异点
- Lowest supply voltage range in PIC18 K22 family （对比 PIC18F43K22-E/PT)
- Smaller Flash footprint for cost-sensitive designs （对比 PIC18LF46K22-E/PT)
- Same TQFP-44 footprint as 4xK22 family siblings （对比 PIC18LF45K22-E/PT)
设计说明
Estimated: At 64 MHz CPU clock and 3.3V supply, the PIC18LF43K22-E/PT core draws approximately 15 mA active. Sleep current with nanoWatt XLP is below 100 nA typical per Microchip datasheet. For battery designs, disable unused peripherals in firmware, configure all unused pins as outputs driven low, and use the internal 31 kHz LFINTOSC during sleep to avoid the high-power HFINTOSC start-up penalty.
The PIC18LF43K22-E/PT is the LF (low-voltage) variant. Do not operate it above 3.6V - this causes latch-up and permanent damage. If your design uses a 5V rail, substitute the PIC18F43K22-E/PT instead. Likewise, the ICSP programming pins RB6 (PGC) and RB7 (PGD) must be available and not driven by external circuitry during programming. Add 4.7 kohm pull-ups to RB6/RB7 if external loads are present.
Place decoupling capacitors (100 nF ceramic plus 10 uF bulk) as close as possible to both VDD pins (11 and 32) and VSS pins (12 and 31). Use a ground plane on layer 2 directly under the TQFP-44 footprint to minimize EMI and provide thermal relief. Keep the crystal traces short and surrounded by ground guard ring. Microchip AN585 reference design provides layout guidelines for USB and ICSP robustness.
For designs using the 12-bit ADC to its full resolution, place a low-pass RC filter (100 ohm + 100 nF) on each analog input pin. Configure the A/D acquisition time per datasheet Table 26-29 based on source impedance. Use the dedicated VREF+ pin with a low-noise reference (MCP1541 or MCP1525) instead of VDD for accurate measurements above 10-bit resolution.
合规信息
RoHS and REACH compliant per Microchip product page. Industrial temperature grade -40C to +125C qualifies the part for non-automotive industrial applications; AEC-Q100 qualification is not applicable to the standard /PT ordering code.