PIC18LF452-I/PT - 8-Bit 40MHz 32KB Flash MCU | Microchip
MPN: PIC18LF452-I/PT ✓ فعالPIC18LF452-I/PT نمای کلی
What is a microcontroller (MCU)? A microcontroller is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash/ROM), volatile data memory (RAM), and programmable peripheral I/O into one package. Microcontrollers belong to the broader category of embedded processors -> microcontrollers -> 8-bit microcontrollers -> PIC microcontrollers (Microchip). The PIC18F family specifically delivers enhanced instruction sets, hardware multipliers, and C-friendly architecture while remaining upwardly compatible with older PIC16 and PIC17 devices.
Key features of the PIC18LF452-I/PT include 34 digital I/O pins, 8 channels of 10-bit ADC, two 8-bit timers plus three 16-bit timers, a 16-bit capture/compare/PWM (CCP) module and an Enhanced CCP module, two USART modules, a Master Synchronous Serial Port (MSSP) supporting SPI and I2C, and an 8-bit parallel slave port. The device also incorporates a 10-bit ADC with up to 8 inputs, a programmable Brown-out Reset (BOR), and a watchdog timer with its own on-chip RC oscillator for maximum reliability.
The architecture is built on a RISC core with 77 single-word instructions, a hardware 8x8 multiplier, and 32 KB of self-programmable Flash that supports In-Circuit Serial Programming (ICSP) and In-Circuit Debug (ICD). Internal oscillator options and four crystal modes provide flexible clocking, while low-power features such as run, idle, and sleep modes plus on-chip power-on reset support battery-friendly designs across industrial, consumer, and automotive (aftermarket) use cases.
Typical applications include industrial control boards, motor control (DC brushed, stepper, and small BLDC via PWM), home appliance control panels, sensor interface hubs, USB/HID human-interface devices, low-cost data acquisition front-ends, automotive body and accessory ECUs (where AEC-Q100 is not required), and educational/development platforms where PIC18 software reuse and toolchain maturity are valued.
When designing with the PIC18LF452-I/PT, ensure the MCLR pin is properly pulled up and that ICSP programming lines (PGC/PGD) are accessible via header or test points. Use decoupling capacitors of 0.1 uF and 10 uF near VDD/VSS pairs, and provide adequate analog and digital ground separation when using the ADC.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone, giving engineers a single reference for sourcing, replacement, and PCB bring-up decisions.
جایگزین‌های drop-in برای PIC18LF452-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 PIC18LF452-I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Timers, Core, ADC, Program Memory (Flash).
PIC18F452-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF4520-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF4523-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF4525-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18LF448-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF442-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF452-I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Manufacturer | Microchip Technology |
| Family | PIC18F |
| Core | 8-bit PIC RISC |
| Program Memory | 32 KB (16K x 16) Flash |
| RAM | 1.5 KB (1536 bytes) |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Operating Voltage | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| ADC | 10-bit, up to 8 channels |
| Timers | 2 x 8-bit, 3 x 16-bit |
| CCP/ECCP Modules | 1 x 16-bit CCP + 1 x ECCP |
| Communication | MSSP (SPI/I2C), 2 x USART, PSP |
| بسته‌بندی | 44-pin TQFP (10x10 mm) |
| محدوده دمای کاری | -40C to +85C (Industrial) |
| ICSP / ICD | Yes |
| Watchdog Timer | Yes, dedicated RC oscillator |
| Brown-out Reset (BOR) | Programmable |
| نوع نصب | Surface Mount |
| RoHS | Compliant |
پیکربندی پین PIC18LF452-I/PT
| پین 1 | MCLR/RE3 — Reset input (active low) / digital input RE3 |
| پین 2 | RA0/AN0 — Digital I/O / analog input AN0 |
| پین 3 | RA1/AN1 — Digital I/O / analog input AN1 |
| پین 4 | RA2/AN2/VREF- — Digital I/O / AN2 / negative voltage reference |
| پین 5 | RA3/AN3/VREF+ — Digital I/O / AN3 / positive voltage reference |
| پین 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| پین 7 | RA5/AN4/SS — Digital I/O / AN4 / SPI slave select |
| پین 8 | RE0/RD/AN5 — Digital I/O / parallel port RD / AN5 |
| پین 9 | RE1/WR/AN6 — Digital I/O / parallel port WR / AN6 |
| پین 10 | RE2/CS/AN7 — Digital I/O / parallel port CS / AN7 |
| پین 11 | VDD — Positive power supply |
| پین 12 | VSS — Ground |
| پین 13 | OSC1/CLKI — Crystal oscillator input / external clock input |
| پین 14 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output / digital I/O |
| پین 15 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / Timer1 clock input |
| پین 16 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 output |
| پین 17 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| پین 18 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| پین 19 | RD0/PSP0 — Digital I/O / Parallel Slave Port bit 0 |
| پین 20 | RD1/PSP1 — Digital I/O / Parallel Slave Port bit 1 |
| پین 21 | RD2/PSP2 — Digital I/O / Parallel Slave Port bit 2 |
| پین 22 | RD3/PSP3 — Digital I/O / Parallel Slave Port bit 3 |
| پین 23 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| پین 24 | RC5/SDO — Digital I/O / SPI data out |
| پین 25 | RC6/TX/CK — Digital I/O / UART TX / synchronous clock |
| پین 26 | RC7/RX/DT — Digital I/O / UART RX / synchronous data |
| پین 27 | RD4/PSP4 — Digital I/O / Parallel Slave Port bit 4 |
| پین 28 | RD5/PSP5 — Digital I/O / Parallel Slave Port bit 5 |
| پین 29 | RD6/PSP6 — Digital I/O / Parallel Slave Port bit 6 |
| پین 30 | RD7/PSP7 — Digital I/O / Parallel Slave Port bit 7 |
| پین 31 | VSS — Ground |
| پین 32 | VDD — Positive power supply |
| پین 33 | RB0/INT0 — Digital I/O / external interrupt 0 |
| پین 34 | RB1/INT1 — Digital I/O / external interrupt 1 |
| پین 35 | RB2/INT2 — Digital I/O / external interrupt 2 |
| پین 36 | RB3/CCP2 — Digital I/O / CCP2 alternate pin |
| پین 37 | RB4 — Digital I/O / interrupt-on-change |
| پین 38 | RB5 — Digital I/O / interrupt-on-change |
| پین 39 | RB6/PGC — Digital I/O / ICSP clock (programming) |
| پین 40 | RB7/PGD — Digital I/O / ICSP data (programming) |
| پین 41 | NC — Not connected (no internal bond) |
| پین 42 | NC — Not connected (no internal bond) |
| پین 43 | NC — Not connected (no internal bond) |
| پین 44 | NC — Not connected (no internal bond) |
کاربردهای معمول
PIC18LF452-I/PT مناسب است برای 7 کاربردs: Industrial Control Boards, Motor Control (DC Brushed / Stepper), Sensor Interface Hubs, Home Appliance Control Panels, USB / HID Human Interface Devices (via Bridge), Educational and Development Platforms, Low-Cost Data Acquisition Front Ends.
Industrial Control Boards
The PIC18LF452-I/PT is well suited to industrial control boards that need 34 digital I/O lines and robust on-chip peripherals. Its 2.0 V to 5.5 V supply range lets it sit on a 24 V industrial bus through a small buck regulator, while its 32 KB Flash holds typical ladder-logic replacement or PID loop code. Compared with newer PIC18F46K22, it has lower cost and a more mature toolchain, at the price of lacking the newer ADC and PWM improvements.
پیشنهادی
Motor Control (DC Brushed / Stepper)
For small brushed DC or stepper motor drives, the PIC18LF452-I/PT provides one ECCP module plus one standard CCP module for PWM generation, with 10-bit ADC feedback for closed-loop current sensing. The 40 MHz / 10 MIPS throughput is sufficient for trapezoidal commutation of small BLDC motors and for software-implemented PID. Trade-off vs a dedicated dsPIC33: the F452 cannot run sensorless FOC at high RPM, so it is best for cost-sensitive brushed or stepper drives.
پیشنهادی
Sensor Interface Hubs
The PIC18LF452-I/PT works well as a sensor aggregation hub that reads multiple analog and digital sensors and forwards data over I2C or UART. The 8-channel 10-bit ADC handles thermocouples, pressure sensors, and strain gauges with adequate resolution for many industrial monitoring tasks, while the MSSP module runs I2C at up to 400 kHz. Trade-off vs a 12-bit ADC MCU like the PIC18F46K22: lower ADC resolution means you cannot detect sub-percent sensor drift.
پیشنهادی
Home Appliance Control Panels
Appliance front-panel controllers benefit from the PIC18LF452-I/PT's 34 I/O lines driving LED indicators, seven-segment displays, keypads, and triac-fired loads. The 2.0 V to 5.5 V range supports direct connection to a rectified 5 V rail with simple filtering. Compared to the PIC18F4620, the F452 is cheaper and has the same display-driving capability, but limits future code growth. Trade-off: no native USB, so adding USB requires a bridge IC.
پیشنهادی
USB / HID Human Interface Devices (via Bridge)
The PIC18LF452-I/PT can drive a USB HID or CDC device when paired with an external bridge IC such as the MCP2200. The UART and 32 KB Flash give ample headroom for vendor-specific command parsing and bootloader code. Compared to a native-USB PIC like the PIC18F2550, this 2-chip approach costs more but lets you keep the F452's mature firmware and toolchain.
پیشنهادی
Educational and Development Platforms
The PIC18LF452-I/PT's mature MPLAB X / XC8 toolchain, abundant community code examples, and TQFP-44 package make it a popular choice for university courses and hobbyist boards. The wide voltage range is forgiving for breadboard wiring mistakes, and ICSP works with low-cost programmers like PICkit 3. Compared to ARM Cortex-M0+ parts like SAMD21, the F452 has less RAM and no DMA, so it is best for teaching fundamentals rather than modern embedded patterns.
پیشنهادی
Low-Cost Data Acquisition Front Ends
For moderate-speed multi-channel data logging, the PIC18LF452-I/PT's 8-channel 10-bit ADC plus UART allows direct connection to analog sensors and streaming to a host PC. At 10 MIPS, the F452 can sample, average, and packetize data fast enough for thermocouple and process-control front ends below 1 kHz per channel. Compared to dedicated 12/14-bit ADC MCUs like PIC18F46K22, the F452 trades resolution and noise for cost and simplicity.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18LF452-I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18F452-I/PT | PIC18LF4520-I/PT | PIC18LF4523-I/PT | PIC18LF4525-I/PT | PIC18LF448-I/PT | PIC18LF442-I/PT |
|---|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB (-50%) |
| RAM | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes | 768 bytes (-50%) |
| Operating Voltage | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Max Clock | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 48 MHz | 40 MHz | 40 MHz |
| I/O Pins | 34 | 34 | 34 | 34 | 34 | 34 | 34 |
| ADC | 10-bit, 8 ch | 10-bit, 8 ch | 10-bit, 13 ch | 12-bit, 8 ch | 10-bit, 8 ch + USB | 10-bit, 8 ch + CAN | 10-bit, 8 ch |
تفاوت‌های کلیدی
- Wide 2.0 V to 5.5 V operating voltage vs 4.2 V to 5.5 V for PIC18F452 (در مقابلPIC18F452-I/PT)
- Larger Flash (32 KB) and RAM (1.5 KB) vs 16 KB / 768 B on PIC18LF442 (در مقابلPIC18LF442-I/PT)
- Mature toolchain (MPLAB X, XC8) and abundant library support (در مقابلATmega328P)
یادداشت‌های طراحی
Place a 0.1 uF decoupling capacitor within 5 mm of each VDD pin (pins 11 and 32) and a single 10 uF bulk tantalum or ceramic capacitor across the VDD/VSS pair. According to the Microchip datasheet, the analog VREF+/VREF- pins (RA2/RA3) must be bypassed with 0.1 uF + 10 uF caps if the ADC is used. Keep analog traces short and separated from digital switching traces to minimize ADC noise pickup.
The MCLR pin (pin 1) MUST be pulled up to VDD through a 10 kohm resistor for normal operation; do NOT leave it floating. According to the Microchip datasheet, an in-circuit serial programming (ICSP) header or test points on PGC (RB6) and PGD (RB7) must be accessible for production programming. Avoid using RB6/RB7 as outputs in production designs unless ICSP is not required, because they are the programming pins.
Route the crystal/oscillator traces (OSC1/OSC2, pins 13/14) short and symmetric, surrounded by a ground pour to minimize EMI. According to the Microchip datasheet, when using a high-speed external oscillator (>4 MHz), keep the crystal within 1 cm of the pins. For EMI-sensitive designs, place a guard ring around the oscillator network tied to analog ground.
The PIC18LF452-I/PT has three low-power modes (run, idle, sleep). According to the Microchip datasheet, sleep reduces current to a few microamps (with watchdog disabled) but loses the main oscillator. Estimated: at 5 V and 4 MHz, idle current is ~2 mA and sleep current ~1 uA typical. Use sleep + watchdog wake-up to achieve sub-mA average power on battery applications.
اطلاعات انطباق
RoHS compliant per Microchip product page. Industrial -40C to +85C temperature grade (I suffix). Not AEC-Q100 qualified - not intended for automotive primary applications.