PIC18LF452T-I/L - 8-Bit MCU, 40MHz, 32KB Flash, 44-PLCC | Microchip
MPN: PIC18LF452T-I/L ✓ فعالPIC18LF452T-I/L نمای کلی
An 8-bit microcontroller (MCU) is a programmable single-chip computer that fetches, decodes, and executes instructions from on-chip FLASH one byte at a time. Within the broader PIC18 family, this LF (low-voltage / low-power F) variant sits at the bottom of the PIC18 hierarchy, which itself belongs to the Microchip 8-bit PIC microcontroller family and, more generally, the embedded microcontroller category of integrated circuits used in power-conscious and cost-sensitive digital control.
Key features of the PIC18LF452T-I/L include 256 bytes of EEPROM data memory, a 10 MIPS instruction execution rate (100 ns per instruction), an enhanced FLASH program memory that supports self-programming and ICD (In-Circuit Debugger), a 10-bit A/D converter with 8 input channels, two Capture/Compare/PWM modules, a USART, an MSSP peripheral that can be configured as either 3-wire SPI or I2C, and a 4-deep hardware stack with 77 single-word instructions in the core instruction set. The architecture is built on CMOS FLASH technology that retains code through power cycles.
Typical applications for the PIC18LF452T-I/L include industrial sensor conditioning, low-power embedded control boards, instrumentation front-ends, motor-control signal pre-processing, and battery-backed remote sensor nodes. Its wide 2.0-5.5 V supply range makes it compatible with both 3.3 V and 5 V system rails, simplifying integration into mixed-voltage designs.
When designing with this device, choose a regulator and decoupling network rated for the inrush of the PLCC-44's I/O switching. Place a 100 nF decoupling capacitor on each VDD/AVDD pin pair as close to the package as routing allows, and add a bulk 10 uF tantalum or ceramic cap near the MCU for transient load steps.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
جایگزین‌های drop-in برای PIC18LF452T-I/L — 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 PIC18LF452T-I/L (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Timers, Operating Temperature, Package, ADC, Core.
PIC18LF452-I/L
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F452T-I/L
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF4525T-I/PT
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF4523T-I/PT
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF4520T-I/PT
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18LF442-I/PT
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF452T-I/L حداکثر مقادیر مجاز و مشخصات الکتریکی
| Product Family | PIC PIC18F |
| Core | PIC18 (8-bit RISC) |
| حداکثر فرکانس کلاک | 40 MHz |
| Instruction Execution Rate | 10 MIPS (100 ns/instruction) |
| Program Memory Type | FLASH |
| Program Memory Size | 32 KB (16K x 16) |
| Data RAM Size | 1.5 KB |
| EEPROM Size | 256 bytes |
| عرض گذرگاه داده | 8 bit |
| ADC Resolution | 10 bit (8 channels) |
| Number of I/Os | 34 I/O |
| ولتاژ تغذیه کاری | 2.0 V to 5.5 V |
| دمای کاری | -40 C to +85 C (Industrial) |
| بسته‌بندی / کیس | PLCC-44 (44-J-lead, 16.59 x 16.59 mm) |
| سبک نصب | SMD/SMT (J-Lead) |
| Packaging | Reel |
| Peripherals | 2 CCP, USART, MSSP (SPI/I2C), 10-bit ADC, ICD |
| Instruction Set | 77 single-word instructions |
پیکربندی پین PIC18LF452T-I/L
| پین 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| 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 VREF- |
| پین 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| پین 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| پین 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| پین 8 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| پین 9 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| پین 10 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| پین 11 | VDD — Digital supply voltage |
| پین 12 | VSS — Digital ground |
| پین 13 | OSC1/CLKI — Oscillator crystal input / external clock input |
| پین 14 | OSC2/CLKO — Oscillator crystal output / clock output |
| پین 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| پین 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| پین 17 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| پین 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| پین 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| پین 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| پین 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| پین 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| پین 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| پین 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| پین 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| پین 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| پین 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| پین 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| پین 29 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| پین 30 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| پین 31 | VSS — Digital ground |
| پین 32 | VDD — Digital supply voltage |
| پین 33 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| پین 34 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| پین 35 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| پین 36 | RB3/INT3/CCP2 — PORTB bit 3 / external interrupt 3 / CCP2 I/O alternate |
| پین 37 | RB4/INT4 — PORTB bit 4 / external interrupt 4 |
| پین 38 | RB5/INT5 — PORTB bit 5 / external interrupt 5 |
| پین 39 | RB6/INT6/PGC — PORTB bit 6 / external interrupt 6 / ICSP clock |
| پین 40 | RB7/INT7/PGD — PORTB bit 7 / external interrupt 7 / ICSP data |
| پین 41 | AVSS — Analog ground |
| پین 42 | AVDD — Analog supply voltage |
| پین 43 | NC — Not connected (per datasheet) |
| پین 44 | NC — Not connected (per datasheet) |
کاربردهای معمول
PIC18LF452T-I/L مناسب است برای 6 کاربردs: Industrial Sensor Conditioning, Low-Power Embedded Control Board, Instrumentation Front-End, Motor-Control Signal Pre-Processing, Battery-Backed Remote Sensor Node, Legacy Embedded Board Replacement.
Industrial Sensor Conditioning
The PIC18LF452T-I/L is a strong fit for industrial sensor conditioning front-ends thanks to its 10-bit ADC with 8 input channels and 2.0-5.5 V supply range. According to the Microchip PIC18F452 datasheet, the LF variant's 2.0 V low-end rail lets it read directly from 3.3 V sensor bridges without an external LDO, while the 40 MHz core (10 MIPS) runs linearization, calibration, and digital filtering in real time. Placed between the sensor bridge and the host PLC, it handles ADC sampling, moving-average filtering, and serial forwarding to a higher-level controller. Unlike 5 V-only legacy PIC18F parts, it supports 3.3 V sensor rails directly, eliminating an extra regulator stage and simplifying the BOM for cost-sensitive industrial nodes.
پیشنهادی
Low-Power Embedded Control Board
The PIC18LF452T-I/L fits low-power embedded control boards because its LF-series silicon supports Sleep mode at sub-microamp currents while still offering 32 KB FLASH and 1.5 KB RAM. According to the Microchip PIC18F452 datasheet, the LF variant runs directly from a 2x AA battery stack (3.0 V) or a 3.3 V regulator, with 34 I/O available to drive keys, LEDs, and small relays. In a typical battery control board, the MCU sleeps between user inputs and wakes on interrupt to scan I/O, log events, and drive indicator LEDs. The advantage over a full-performance PIC18F part is sub-uA Sleep current, which directly extends battery life in remote or maintenance-free control nodes.
پیشنهادی
Instrumentation Front-End
The PIC18LF452T-I/L serves well as an instrumentation front-end controller with its 10-bit ADC, USART, and MSSP (SPI/I2C) peripherals. According to the Microchip PIC18F452 datasheet, the 40 MHz instruction rate supports serial protocol bridging at 115.2 kbaud or faster while simultaneously scanning analog channels, making it suitable for bench instruments and process-monitor displays. Typical circuits pair the MCU with an external op-amp front-end for sensor gain, then read the conditioned signal through AN0-AN7 and forward data over USART or SPI to a host display. Compared with a discrete analog design, the integrated MCU reduces part count while preserving a 4.88 mV ADC step at 5 V VREF.
پیشنهادی
Motor-Control Signal Pre-Processing
The PIC18LF452T-I/L fits motor-control signal pre-processing because its two CCP modules can output PWM and capture feedback timing in parallel with ADC sampling. According to the Microchip PIC18F452 datasheet, the 10 MIPS core can run basic trapezoidal commutation tables and current-loop helpers when paired with an external gate driver. Placed on a low-voltage signal board between Hall sensors and a 3-phase inverter, the MCU conditions position signals, computes commutation timing, and forwards gate commands over SPI or PWM. The advantage over a full DSP is low BOM cost and 2.0 V operation, simplifying battery-driven or USB-powered bench motor prototypes.
پیشنهادی
Battery-Backed Remote Sensor Node
The PIC18LF452T-I/L is well suited to battery-backed remote sensor nodes thanks to its LF-series low-voltage capability, 32 KB FLASH for protocol stacks, and 1.5 KB RAM for buffering. According to the Microchip PIC18F452 datasheet, Sleep mode plus on-chip USART allows the MCU to wake periodically, take an ADC measurement, transmit via RS-485 or I2C, and return to sleep, achieving years of operation on 2x AA cells. Typical implementations pair it with an external RTC or sensor and use the 256-byte EEPROM for calibration non-volatile storage. The advantage over higher-performance ARM Cortex parts is dramatically lower Sleep current and simpler development using the PIC18 instruction set and MPLAB X toolchain.
پیشنهادی
Legacy Embedded Board Replacement
The PIC18LF452T-I/L serves as a drop-in replacement on legacy 5 V embedded boards originally designed for the PIC18F452 family, especially where the LF voltage range is irrelevant. According to the Microchip PIC18F452 datasheet and PLCC-44 package retention, the PIC18LF452T-I/L preserves the original footprint, pinout, peripherals, and memory map, allowing direct substitution when stock of the original PIC18F452 is exhausted. Engineers redesigning for the LF variant benefit from 2.0 V operation, allowing boards to optionally run from 3.3 V without changing layout. Compared with custom-board redesigns around a new MCU family, this drop-in approach saves PCB rework, firmware porting effort, and certification re-testing.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18LF452T-I/L — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18LF452-I/L | PIC18F452T-I/L | PIC18LF4525T-I/PT | PIC18LF4523T-I/PT | PIC18LF4520T-I/PT | PIC18LF442-I/PT |
|---|---|---|---|---|---|---|---|
| Package | PLCC-44 (J-lead, 16.59x16.59 mm) | PLCC-44 - same | PLCC-44 - same | TQFP-44 | TQFP-44 | TQFP-44 | TQFP-44 |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V - same | 4.2 V to 5.5 V (less low-end support) | 2.0 V to 5.5 V (per LF family) | 2.0 V to 5.5 V (per LF family) | 2.0 V to 5.5 V (per LF family) | 2.0 V to 5.5 V (per LF family) |
| Program Memory (FLASH) | 32 KB | 32 KB - same | 32 KB - same | 48 KB (enhanced family) | 32 KB (enhanced family) | 32 KB (enhanced family) | 16 KB (40-pin cousin) |
| Data RAM | 1.5 KB | 1.5 KB - same | 1.5 KB - same | 3.5 KB (enhanced family) | 1.5 KB (enhanced family) | 1.5 KB (enhanced family) | 768 B (40-pin cousin) |
| Maximum Clock Frequency | 40 MHz | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same | 40 MHz - same |
| Number of I/O Pins | 34 I/O | 34 I/O - same | 34 I/O - same | 36 I/O (enhanced family) | 36 I/O (enhanced family) | 36 I/O (enhanced family) | 33 I/O (40-pin cousin) |
| ADC Resolution | 10-bit / 8 channels | 10-bit / 8 channels - same | 10-bit / 8 channels - same | 10-bit / 8 channels (enhanced family) | 10-bit / 12 channels (enhanced family) | 10-bit / 13 channels (enhanced family) | 10-bit / 8 channels |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same | -40 C to +85 C - same |
تفاوت‌های کلیدی
- Wide 2.0-5.5V supply range supports 3.3V and 5V designs (در مقابلPIC18F452T-I/L (standard F variant))
- 44-PLCC surface-mount package with J-lead (در مقابلPIC18LF452-I/PT (TQFP variant))
- Industrial temperature range (-40C to +85C) standard (در مقابلPIC18LF452T-E/L (extended temperature variant))
- On-chip 256-byte EEPROM for non-volatile data (در مقابلPIC18LF252-I/SO (28-pin cousin))
یادداشت‌های طراحی
Estimated power analysis: at 40 MHz core clock and 5.5 V supply, the PIC18LF452T-I/L draws approximately 11 mA active and sub-uA in Sleep mode (per Microchip PIC18F452 datasheet DC characteristics). Place a 100 nF decoupling capacitor on each VDD/VSS pair (pins 11/12 and 31/32) and on the AVDD/AVSS pair (pins 42/41), as close to the package leads as the PCB layout allows. Add a bulk 10 uF tantalum or ceramic capacitor near VDD to absorb I/O switching transients from the 34 digital I/O pins.
Use a continuous ground plane under the PLCC-44 footprint and route AVSS (pin 41) directly to the ground plane with a single via to minimize analog ground bounce. Keep ADC analog traces (RA0-RA5, RE0-RE2) short and away from the oscillator pins (OSC1/OSC2) and the switching I/O lines on PORTD to reduce ADC noise coupling. A 4-layer board with dedicated VDD and GND planes is recommended for industrial sensor designs where ADC readings approach 4.88 mV LSB resolution.
Do not apply 5 V signals to RA0-RA5 / RE0-RE2 when the AVDD is at 3.3 V - the analog inputs are clamped to AVDD and exceeding AVDD+0.3 V can damage the ADC multiplexer. Do not omit the MCLR pull-up (typically 10 kohm to VDD) on pin 1, as floating MCLR causes unpredictable resets. When using the ICD debug interface, isolate the PGC/PGD lines (RB6/RB7) from any external pull-ups stronger than 10 kohm to avoid interfering with in-circuit programming.
For long traces on RC3/SCK, RC4/SDI/SDA, RC5/SDO, RC6/TX, and RC7/RX, add a series 100 ohm resistor near the MCU to dampen ringing on SPI/I2C/UART lines, especially when driving cables or external connectors. The MSSP peripheral in SPI mode operates up to 10 MHz at 40 MHz core, so controlled impedance (typically 50 ohm single-ended) matters above 5 MHz. Use a ferrite bead on the cable-side power rail feeding the connector to suppress common-mode noise coupling into the MCU ground.
اطلاعات انطباق
RoHS and REACH compliance not explicitly stated in verified web data; marked unknown. AEC-Q100 not applicable for general-purpose industrial MCU. Lead-free terminations are typical for Microchip PIC18 LF-series production parts per Microchip packaging documentation. Conflict-minerals compliance declared per Microchip corporate policy.
