PIC18LF4420-I/PT - 8-bit 40MHz MCU 16KB Flash 44-TQFP | Microchip
MPN: PIC18LF4420-I/PT ✓ نشطPIC18LF4420-I/PT نظرة عامة
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O into one package. The PIC18 family is Microchip's enhanced 8-bit architecture that sits between the baseline PIC16 family and the 16-bit dsPIC family. Within this hierarchy, the PIC18LF4420 belongs to the PIC18F4420 sub-family, which targets general-purpose embedded control with on-chip 10-bit ADC, multiple timers, and communication peripherals.
Key features include 36 digital I/O pins, a 10-bit ADC with up to 13 input channels, two capture/compare/PWM modules, two USART modules, an SPI/I2C master/slave MSSP peripheral, and a 13-channel ADC. The device supports in-circuit serial programming (ICSP) and in-circuit debugging via two program/debug pins, enabling direct flash programming on the assembled PCB without removing the device.
The PIC18LF4420-I/PT employs an enhanced Harvard architecture with a 16-bit instruction word and 8-bit data path, achieving 200ns minimum instruction execution at 40MHz. Internal Phase-Locked Loop (PLL) support and an internal 31kHz to 8MHz oscillator reduce external component count, while the nanoWatt technology provides multiple power-managed modes (Idle, Sleep) for battery-powered applications.
Typical applications include industrial control panels, automotive body electronics (non-safety), sensor node interfaces, HVAC controllers, low-power remote controls, and consumer white goods. The wide 2.0V to 5.5V operating range supports both 3.3V and 5V system designs.
When designing with this device, ensure decoupling capacitor placement (100nF) close to VDD pins and that MCLR is pulled high through a resistor for normal operation. The 44-TQFP package has a relatively large 10x10 mm footprint - if board space is critical, consider the QFN-package variant PIC18LF4420-I/ML.
This page synthesizes distributor pricing, drop-in PIC18F/LF family alternatives, and practical design notes not found in the manufacturer datasheet.
بدائل مباشرة لـ PIC18LF4420-I/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18LF4420-I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Timers, Core Architecture, Operating Temperature, CCP Modules.
PIC18F4420-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
PIC18LF4520-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F4520-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4320-I/PT
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LF4420-I/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC18 (8-bit RISC, enhanced Harvard) |
| CPU Core | PIC18 (16-bit instruction, 8-bit data) |
| أقصى تردد للساعة | 40 MHz (10 MIPS) |
| Program Memory Type | FLASH |
| Program Memory Size | 16 KB (8K x 16 words) |
| RAM Size | 768 bytes |
| EEPROM Size | 256 bytes |
| Supply Voltage Range | 2.0 V to 5.5 V |
| نطاق درجة حرارة التشغيل | -40C to +85C (Industrial) |
| I/O Pins | 36 |
| ADC | 10-bit, up to 13 channels |
| Timers | 4 (Timer0, Timer1, Timer2, Timer3) |
| CCP Modules | 2 (Capture/Compare/PWM) |
| Communication | 1x MSSP (SPI/I2C), 1x USART (EUSART) |
| العلبة | 44-pin TQFP (PT) 10x10 mm |
| نوع التركيب | Surface Mount |
| مستوى MSL | 3 (168 hours) |
| حالة RoHS | Compliant |
تكوين أطراف PIC18LF4420-I/PT
| دبوس 1 | MCLR — Master Clear (Reset) input, active low |
| دبوس 2 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| دبوس 3 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| دبوس 4 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / ADC VREF- |
| دبوس 5 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC VREF+ |
| دبوس 6 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| دبوس 7 | RA5/AN4/SS — Port A bit 5 / Analog input 4 / SPI Slave Select |
| دبوس 8 | RE0/RD/AN5 — Port E bit 0 / Parallel port Read / Analog input 5 |
| دبوس 9 | RE1/WR/AN6 — Port E bit 1 / Parallel port Write / Analog input 6 |
| دبوس 10 | RE2/CS/AN7 — Port E bit 2 / Parallel port Chip Select / Analog input 7 |
| دبوس 11 | VDD — Positive supply voltage |
| دبوس 12 | VSS — Ground reference |
| دبوس 13 | OSC1/CLKI/RA7 — Oscillator input / External clock / Port A bit 7 |
| دبوس 14 | OSC2/CLKO/RA6 — Oscillator output / Clock output / Port A bit 6 |
| دبوس 15 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock input |
| دبوس 16 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 output |
| دبوس 17 | RC2/CCP1 — Port C bit 2 / CCP1 output |
| دبوس 18 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| دبوس 19 | RD0/PSP0 — Port D bit 0 / Parallel Slave Port bit 0 |
| دبوس 20 | RD1/PSP1 — Port D bit 1 / Parallel Slave Port bit 1 |
| دبوس 21 | RD2/PSP2 — Port D bit 2 / Parallel Slave Port bit 2 |
| دبوس 22 | RD3/PSP3 — Port D bit 3 / Parallel Slave Port bit 3 |
| دبوس 23 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| دبوس 24 | RC5/SDO — Port C bit 5 / SPI data out |
| دبوس 25 | RC6/TX/CK — Port C bit 6 / EUSART TX / EUSART clock |
| دبوس 26 | RC7/RX/DT — Port C bit 7 / EUSART RX / EUSART data |
| دبوس 27 | RD4/PSP4 — Port D bit 4 / Parallel Slave Port bit 4 |
| دبوس 28 | RD5/PSP5 — Port D bit 5 / Parallel Slave Port bit 5 |
| دبوس 29 | RD6/PSP6 — Port D bit 6 / Parallel Slave Port bit 6 |
| دبوس 30 | RD7/PSP7 — Port D bit 7 / Parallel Slave Port bit 7 |
| دبوس 31 | VSS — Ground reference |
| دبوس 32 | VDD — Positive supply voltage |
| دبوس 33 | RB0/INT0 — Port B bit 0 / External interrupt 0 |
| دبوس 34 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| دبوس 35 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| دبوس 36 | RB3/INT3/CCP2 — Port B bit 3 / External interrupt 3 / CCP2 alternate |
| دبوس 37 | RB4 — Port B bit 4 |
| دبوس 38 | RB5 — Port B bit 5 |
| دبوس 39 | RB6/PGC — Port B bit 6 / ICSP clock |
| دبوس 40 | RB7/PGD — Port B bit 7 / ICSP data |
| دبوس 41 | VSS — Ground reference (additional) |
| دبوس 42 | NC — Not connected (per datasheet) |
| دبوس 43 | AVDD — Analog positive supply (connect to VDD if ADC unused) |
| دبوس 44 | AVSS — Analog ground (connect to VSS if ADC unused) |
التطبيقات النموذجية
PIC18LF4420-I/PT مناسب لـ 6 التطبيقs: Industrial Control Panels, HVAC Thermostat Controllers, Automotive Body Electronics, Sensor Node / Data Logger, Consumer White Goods, Battery-Powered Remote Controls.
Industrial Control Panels
The PIC18LF4420-I/PT fits industrial control panels due to its 36 I/O pins, 13-channel 10-bit ADC, and 2.0V-5.5V supply tolerance that withstands 24V-sourced rails with LDO regulation. Its 40MHz CPU executes PLC-style logic within sub-microsecond response times, while the 16KB FLASH supports ladder-logic-to-C translation libraries. The -40C to +85C industrial temperature rating meets IEC 61131-2 panel environment specs.
موصى به
HVAC Thermostat Controllers
HVAC thermostats benefit from the PIC18LF4420-I/PT's nanoWatt sleep modes and 2.0V minimum supply, enabling multi-year battery life on 2xAA cells. Its 13-channel ADC handles NTC thermistor inputs for indoor/outdoor/coil temperature sensing, while the CCP modules drive triac-controlled blower and compressor stages. The 16KB FLASH accommodates wireless protocol stacks (Zigbee sub-GHz, BLE) with room for application code.
موصى به
Automotive Body Electronics
Non-safety automotive body modules such as seat controllers, mirror adjusters, and lighting drivers use the PIC18LF4420-I/PT for its 40MHz CPU and CAN-friendly EUSART peripherals. While not AEC-Q100 qualified, the -40C to +85C temperature range covers most passenger-compartment applications. Its 36 I/O pins handle multiple motor H-bridges and LED matrix drivers without external MUX.
موصى به
Sensor Node / Data Logger
Wireless sensor nodes leverage the PIC18LF4420-I/PT's sub-microamp sleep current and 13-channel ADC to poll multiple sensors (temperature, humidity, pressure) over extended periods. The SPI MSSP interfaces directly to LoRa or sub-GHz transceivers, while the EUSART provides RS-485 wired connectivity. The 768-byte RAM buffers sensor data between wake cycles, and 16KB FLASH fits custom protocol stacks plus calibration tables.
موصى به
Consumer White Goods
Washing machines, dishwashers, and microwave ovens employ the PIC18LF4420-I/PT for user-interface control with keypad scanning, LCD driving via MSSP, and triac-controlled motor actuation. The 2.0V-5.5V supply handles rectified mains with simple LDO regulation. The 16KB FLASH supports graphical UI bitmaps and appliance-state machines, while 768 bytes RAM holds UI buffers during display updates.
موصى به
Battery-Powered Remote Controls
RF remote controls benefit from the PIC18LF4420-I/PT's 2.0V minimum supply that operates from a single CR2032 cell (3V nominal) down to 2V end-of-life. The EUSART/MSSP drives sub-GHz or BLE SoCs via SPI, and nanoWatt sleep modes extend coin-cell life to multi-year durations. The 16KB FLASH accommodates user-customizable button mapping and IR/RF protocol libraries.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18LF4420-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18F4420-I/PT | PIC18LF4520-I/PT | PIC18F4520-I/PT | PIC18LF4320-I/PT |
|---|---|---|---|---|---|
| Package | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm | 44-TQFP (PT) 10x10 mm |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 16 KB FLASH | 16 KB FLASH | 32 KB FLASH | 32 KB FLASH | 8 KB FLASH |
| Supply Voltage | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V |
| Maximum Clock | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| RAM | 768 bytes | 768 bytes | 1536 bytes | 1536 bytes | 512 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant |
أبرز الفروقات
- Lower minimum supply voltage for battery-powered designs (مقابلPIC18F4420-I/PT)
- Lower quiescent current in sleep mode (مقابلPIC18F4420-I/PT)
- Smaller package footprint variant available (مقابلPIC18LF4420-I/PT (this part))
ملاحظات التصميم
Place 100nF decoupling capacitors as close as possible to each VDD pin (pins 11, 32) and a bulk 10uF tantalum or ceramic capacitor at the VDD rail entry. The PIC18LF4420-I/PT draws brief high-current spikes during FLASH programming/erase operations - inadequate decoupling leads to programming failures or runtime glitches. Add a 10uF + 100nF combination at the regulator output if powering from a switching converter.
The 44-TQFP package requires careful PCB layout to support ICSP (In-Circuit Serial Programming) and ICD (In-Circuit Debugging). Route the PGD (pin 40) and PGC (pin 39) signals with short, direct traces to a 6-pin header placed at the board edge. The MCLR pin (pin 1) must have a 10kohm pull-up to VDD and a 100nF cap to ground for in-circuit debug stability - never leave MCLR floating.
Do not confuse the LF (low-voltage) variant with the F variant - the LF supports 2.0V minimum but the F requires 4.2V minimum. If migrating a PIC18F4420 design to PIC18LF4420, no software changes are required, but verify the brown-out and voltage regulator configuration bits match the new supply range. The configuration bits are at FLASH address 0x300000 and 0x300001 and must be set correctly to enable the internal oscillator and disable the watchdog if not used.
When using the external oscillator (HS or XT mode), keep the crystal traces short and surround them with a ground pour to minimize EMI. For the internal 8MHz oscillator (default after factory reset), no external components are needed but the frequency tolerance is +/- 2% over temperature. For USB or UART applications requiring tight baud-rate accuracy, use a crystal with the HS PLL mode or switch to an F4520 with internal PLL.
معلومات الامتثال
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - for automotive safety applications consider dsPIC33 or PIC18 K-series AEC-Q100 qualified parts.