PIC18LF4520-I/PT - 8-Bit 40MHz 32KB Flash MCU 44-TQFP | Microchip
MPN: PIC18LF4520-I/PT ✓ فعالPIC18LF4520-I/PT نمای کلی
Key features include 36 digital I/O pins, a 10-bit analog-to-digital converter with up to 13 input channels, four timer modules, two capture/compare/PWM modules, two USART modules, one MSSP (SPI/I2C) peripheral, and a nanoWatt power-managed sleep architecture. The wide 2.0V to 5.5V supply range accommodates both 3.3V and 5V rails, while the LF silicon process variant delivers lower core current draw than the standard F parts at equivalent clock speeds.
The PIC18 architecture provides a C-friendly 16-bit instruction word with 8-bit data path, 31-level hardware stack, and interrupt-priority support. The integrated 32 KB self-programmable flash supports In-Circuit Serial Programming (ICSP) and In-Circuit Debugging (ICD), enabling field firmware updates and free MPLAB X IDE development with no toolchain cost. The 256-byte EEPROM and 1536-byte SRAM are sufficient for small embedded datalogging and protocol-handling tasks.
Typical applications include industrial sensor interfacing, low-power motor control, USB-to-UART bridges, small-format motor drives, building automation nodes, and consumer appliance control boards. The LF variant's nanoWatt technology is particularly advantageous for battery-powered instruments where sleep-mode current in the microampere range extends operating life.
When designing with this device, ensure decoupling on VDD/VSS pins (one 100 nF per supply pin plus a bulk 10 uF), route the ICSP/ICD pins (PGC/PGD) to a programming header for firmware updates, and check the MCLR pull-up network for reliable reset behaviour. For high-EMI environments, add a small series resistor on MCLR and place the crystal within 10 mm of the OSC pins.
جایگزین‌های drop-in برای PIC18LF4520-I/PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC18LF4520-I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Timers, Core, Communication, Core Architecture.
PIC18F4520-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF4423-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF4520-I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core | PIC18 (8-bit enhanced RISC) |
| Program Memory (Flash) | 32 KB |
| RAM | 1536 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, up to 13 channels |
| Timers | 4 |
| CCP Modules | 2 |
| USART | 2 |
| MSSP (SPI/I2C) | 1 |
| دمای کاری | -40C to +85C (Industrial) |
| بسته‌بندی | 44-pin TQFP (10x10 mm, PT) |
| نوع نصب | Surface Mount |
| وضعیت RoHS | Compliant |
| سطح MSL | 3 |
پیکربندی پین PIC18LF4520-I/PT
| پین 1 | MCLR/VPP/RE3 — Master Clear reset input or programming voltage; RE3 digital input only |
| پین 2 | RA0/AN0 — PORTA bit 0; analog input 0 |
| پین 3 | RA1/AN1 — PORTA bit 1; analog input 1 |
| پین 4 | RA2/AN2/VREF- — PORTA bit 2; analog input 2; ADC negative reference |
| پین 5 | RA3/AN3/VREF+ — PORTA bit 3; analog input 3; ADC positive reference |
| پین 6 | RA4/T0CKI — PORTA bit 4; Timer0 clock input |
| پین 7 | RA5/AN4 — PORTA bit 5; analog input 4 |
| پین 8 | RA6/OSC2/CLKO — PORTA bit 6; oscillator output; clock output |
| پین 9 | RA7/OSC1/CLKI — PORTA bit 7; oscillator input; clock input |
| پین 10 | VSS — Ground reference |
| پین 11 | VDD — Positive supply voltage (2.0-5.5 V) |
| پین 12 | RB0/INT0/AN12 — PORTB bit 0; external interrupt 0; analog input 12 |
| پین 13 | RB1/INT1/AN10 — PORTB bit 1; external interrupt 1; analog input 10 |
| پین 14 | RB2/INT2/AN8 — PORTB bit 2; external interrupt 2; analog input 8 |
| پین 15 | RB3/INT3/AN9 — PORTB bit 3; external interrupt 3; analog input 9 |
| پین 16 | RB4/AN11 — PORTB bit 4; analog input 11 |
| پین 17 | RB5/PGM — PORTB bit 5; low-voltage ICSP enable |
| پین 18 | RB6/PGC — PORTB bit 6; ICSP clock |
| پین 19 | RB7/PGD — PORTB bit 7; ICSP data |
| پین 20 | VSS — Ground reference |
| پین 21 | VDD — Positive supply voltage (2.0-5.5 V) |
| پین 22 | RC0/T1OSO/T1CKI — PORTC bit 0; Timer1 oscillator output or clock input |
| پین 23 | RC1/T1OSI/CCP2 — PORTC bit 1; Timer1 oscillator input; CCP2 PWM output |
| پین 24 | RC2/CCP1 — PORTC bit 2; CCP1 PWM output |
| پین 25 | RC3/SCK/SCL — PORTC bit 3; SPI clock or I2C clock |
| پین 26 | RC4/SDI/SDA — PORTC bit 4; SPI data in or I2C data |
| پین 27 | RC5/SDO — PORTC bit 5; SPI data out |
| پین 28 | RC6/TX/CK — PORTC bit 6; USART async transmit or sync clock |
| پین 29 | RC7/RX/DT — PORTC bit 7; USART async receive or sync data |
| پین 30 | VSS — Ground reference |
| پین 31 | VDD — Positive supply voltage (2.0-5.5 V) |
| پین 32 | RD0/PSP0 — PORTD bit 0; parallel slave port data 0 |
| پین 33 | RD1/PSP1 — PORTD bit 1; parallel slave port data 1 |
| پین 34 | RD2/PSP2 — PORTD bit 2; parallel slave port data 2 |
| پین 35 | RD3/PSP3 — PORTD bit 3; parallel slave port data 3 |
| پین 36 | RD4/PSP4 — PORTD bit 4; parallel slave port data 4 |
| پین 37 | RD5/PSP5 — PORTD bit 5; parallel slave port data 5 |
| پین 38 | RD6/PSP6 — PORTD bit 6; parallel slave port data 6 |
| پین 39 | RD7/PSP7 — PORTD bit 7; parallel slave port data 7 |
| پین 40 | VSS — Ground reference |
| پین 41 | VDD — Positive supply voltage (2.0-5.5 V) |
| پین 42 | RE0/RD/AN5 — PORTE bit 0; read control or analog input 5 |
| پین 43 | RE1/WR/AN6 — PORTE bit 1; write control or analog input 6 |
| پین 44 | RE2/CS/AN7 — PORTE bit 2; chip select or analog input 7 |
کاربردهای معمول
PIC18LF4520-I/PT مناسب است برای 6 کاربردs: Industrial Sensor Conditioning, Battery-Powered Data Logger, HVAC Control Board, Small Motor Drive Controller, Consumer Appliance Control, Educational / Hobby Development Board.
Industrial Sensor Conditioning
The PIC18LF4520-I/PT fits industrial sensor-conditioning boards where its 10-bit 13-channel ADC, 2.0-5.5 V supply range, and 36 GPIO lines provide ample headroom for multi-signal conditioning. Its nanoWatt sleep modes and 40 MHz MIPS throughput let a single MCU read thermocouples, pressure sensors, and digital inputs while still servicing the two USARTs for fieldbus (Modbus RTU, RS-485) traffic. The LF silicon runs directly from a 3.3 V regulated rail or a 2-cell Li-ion pack without a boost converter.
پیشنهادی
Battery-Powered Data Logger
The PIC18LF4520-I/PT is a strong fit for portable data loggers thanks to its LF silicon process and nanoWatt technology, which drop core current draw well below 1 mA in Sleep mode while still supporting 2.0 V operation from nearly-depleted batteries. The 32 KB flash stores the logging firmware, 256 bytes of EEPROM holds calibration constants, and 1536 bytes of SRAM acts as the rolling sample buffer. Real-time clock discipline and SD card write cycles are managed by the MSSP SPI channel, while the 10-bit ADC digitizes sensor inputs at programmable rates.
پیشنهادی
HVAC Control Board
Commercial and residential HVAC control boards use the PIC18LF4520-I/PT because its 40 MHz core can scan keypads, drive triac-fired outputs via the CCP/PWM modules, and simultaneously maintain a Modbus link to a building-management system. The 13-channel ADC reads return-air temperature, supply-air temperature, humidity sensors, and potentiometer setpoints with sufficient resolution for closed-loop fan/blower control. Wide 2.0-5.5 V operation lets the board ride out power glitches on rectified 24 VAC supplies without resetting.
پیشنهادی
Small Motor Drive Controller
BLDC and stepper drive boards with moderate performance needs use the PIC18LF4520-I/PT as the supervisory controller. Its two CCP modules generate PWM gate-drive signals for the half-bridge drivers, while the 10-bit ADC samples phase currents via shunt amplifiers for basic torque/speed regulation. The 40 MHz core and 10 MIPS throughput execute the commutation table and PI control loop at 20 kHz PWM frequency without CPU saturation, and the wide 2-5.5 V supply keeps the logic rail stable across motor inrush transients.
پیشنهادی
Consumer Appliance Control
Washing machines, dishwashers, and coffee machines integrate the PIC18LF4520-I/PT because its 32 KB flash accommodates the full appliance state machine and its two USARTs interface with the user display board and motor inverter simultaneously. The 256-byte EEPROM stores user preferences and last-cycle state across power cycles, while the nanoWatt Idle mode powers the front panel when the appliance is in standby. The industrial temperature grade ensures reliable operation in kitchen thermal environments up to 85C ambient.
پیشنهادی
Educational / Hobby Development Board
Universities and maker communities use the PIC18LF4520-I/PT on development boards because the free MPLAB X IDE, free XC8 compiler, and inexpensive PICkit programmers provide a complete zero-cost toolchain. The 44-pin TQFP breaks out enough GPIO and peripheral pins to teach timers, ADC, USART, I2C, and SPI exercises in a single chip, while ICSP/ICD lets students single-step through C code on real hardware. The wide 2-5.5 V supply lets the same board run from USB 5 V or a single Li-ion cell, simplifying lab power setups.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18LF4520-I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18F4520-I/PT | PIC18LF4423-I/PT | PIC18LF4520-I/ML |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (PT) | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin QFN (ML) - DIFFERENT |
| Program Flash | 32 KB | 32 KB | 16 KB | 32 KB |
| RAM | 1536 B | 1536 B | 768 B | 1536 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B |
| Supply Voltage | 2.0-5.5 V | 4.2-5.5 V | 2.0-5.5 V | 2.0-5.5 V |
| Maximum Clock | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| I/O Pins | 36 | 36 | 25 | 36 |
| ADC | 10-bit, 13 channels | 10-bit, 13 channels | 12-bit, 12 channels | 10-bit, 13 channels |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
تفاوت‌های کلیدی
- Wide 2.0-5.5 V supply range across the LF silicon (در مقابلPIC18F4520-I/PT)
- Industry-standard 32 KB / 1536 B / 256 B memory profile (در مقابلPIC18LF4423-I/PT)
- TQFP-44 package with 0.8 mm pitch for hand-soldering-friendly prototyping (در مقابلPIC18LF4520-I/ML)
یادداشت‌های طراحی
Decoupling is critical on the four VDD/VSS pairs (pins 11/10, 21/20, 31/30, 41/40) of the PIC18LF4520-I/PT 44-pin TQFP. Place one 100 nF X7R ceramic capacitor within 3 mm of each VDD pin, plus a single shared 10 uF X5R bulk capacitor near the chip. For battery-powered designs, add a 10 ohm ferrite bead on the supply rail feeding the analog-sensitive VDD pin (pin 11) to filter switching-noise from the digital pins.
The MCLR pin (pin 1) on the PIC18LF4520-I/PT is RE3-input-only, which means it cannot drive high as a digital output. Do not wire MCLR directly to VDD with a 0 ohm link - always use a 10 kohm pull-up so the ICSP programmer can drive VPP during flash programming. A common mistake is omitting the 100 nF cap on MCLR, which causes spurious resets in noisy motor-drive environments.
Route the ICSP/ICD pins RB6/PGC (pin 18) and RB7/PGD (pin 19) directly to a 5-pin header with no series resistors, and place the header within 50 mm of the MCU for reliable programming. Keep the crystal or resonator within 10 mm of OSC1/OSC2 (pins 9/8) and surround it with a ground pour to minimize EMI pickup. For high-speed ADC sampling, separate the AVdd/VREF analog traces from the digital switching traces and use a star-ground topology at the MCU's VSS pins.
اطلاعات انطباق
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - this is a general-purpose industrial grade part. Lead-free (Pb-free) reflow-compatible per JEDEC J-STD-020.
