PIC18LF452T-I/L - 8-Bit MCU, 40MHz, 32KB Flash, 44-PLCC | Microchip
MPN: PIC18LF452T-I/L ✓ Hoạt độngPIC18LF452T-I/L Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF452T-I/L — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18LF452T-I/L (cùng hình factor và footprint) — khác nhau ở Timers, Operating Temperature, Package, ADC, Core.
PIC18LF452-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F452T-I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF4525T-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF4523T-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF4520T-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF442-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LF452T-I/L Tỷ lệ tối đa & tính chất điện
| Product Family | PIC PIC18F |
| Core | PIC18 (8-bit RISC) |
| Tần số xung maksimum | 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 |
| Bề rộng đường dữ liệu | 8 bit |
| ADC Resolution | 10 bit (8 channels) |
| Number of I/Os | 34 I/O |
| Điện áp cung cấp hoạt động | 2.0 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp / Vỏ | PLCC-44 (44-J-lead, 16.59 x 16.59 mm) |
| Kiểu lắp đặt | SMD/SMT (J-Lead) |
| Packaging | Reel |
| Peripherals | 2 CCP, USART, MSSP (SPI/I2C), 10-bit ADC, ICD |
| Instruction Set | 77 single-word instructions |
Cấu hình chân PIC18LF452T-I/L
| Chân 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Chân 8 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| Chân 9 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| Chân 10 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| Chân 11 | VDD — Digital supply voltage |
| Chân 12 | VSS — Digital ground |
| Chân 13 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Chân 14 | OSC2/CLKO — Oscillator crystal output / clock output |
| Chân 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| Chân 17 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Chân 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Chân 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Chân 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Chân 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Chân 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Chân 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Chân 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Chân 29 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Chân 30 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Chân 31 | VSS — Digital ground |
| Chân 32 | VDD — Digital supply voltage |
| Chân 33 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Chân 34 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Chân 35 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Chân 36 | RB3/INT3/CCP2 — PORTB bit 3 / external interrupt 3 / CCP2 I/O alternate |
| Chân 37 | RB4/INT4 — PORTB bit 4 / external interrupt 4 |
| Chân 38 | RB5/INT5 — PORTB bit 5 / external interrupt 5 |
| Chân 39 | RB6/INT6/PGC — PORTB bit 6 / external interrupt 6 / ICSP clock |
| Chân 40 | RB7/INT7/PGD — PORTB bit 7 / external interrupt 7 / ICSP data |
| Chân 41 | AVSS — Analog ground |
| Chân 42 | AVDD — Analog supply voltage |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC18LF452T-I/L phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF452T-I/L — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Wide 2.0-5.5V supply range supports 3.3V and 5V designs (vsPIC18F452T-I/L (standard F variant))
- 44-PLCC surface-mount package with J-lead (vsPIC18LF452-I/PT (TQFP variant))
- Industrial temperature range (-40C to +85C) standard (vsPIC18LF452T-E/L (extended temperature variant))
- On-chip 256-byte EEPROM for non-volatile data (vsPIC18LF252-I/SO (28-pin cousin))
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
