PIC18LC452-I/P - 32KB OTP 8-bit MCU, 40MHz, 40-PDIP | Microchip
MPN: PIC18LC452-I/P ✗ Cuối đờiPIC18LC452-I/P Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces on a single die. The PIC18 family belongs to the broader taxonomy of microcontrollers -> embedded controllers -> microprocessors -> semiconductors, and specifically targets high-performance 8-bit applications where deterministic timing, low power, and C-compiler optimized instruction sets are valued. The PIC18LC452 sits within Microchip's legacy PIC18C series of OTP-programmed devices, source-code compatible with PIC16C7X pinouts.
Key specifications include four 16-bit timer/counter modules (Timer0/1/2/3) with selectable prescaler, dual Capture/Compare/PWM (CCP) modules, a USART with addressable addressing, an SPI/I2C-compatible master/slave synchronous serial port, three external interrupt sources, and high-current 25 mA sink/source capability per I/O. An 8x8 hardware multiplier, 16-bit instructions, and a 31-level hardware stack support efficient C code generation.
The PIC18LC452 utilizes an enhanced Harvard architecture with separate program and data buses, an 8-bit data path, and 16-bit instructions. Its analog peripherals include a 10-bit ADC with up to 12 input channels, while digital peripherals include a Parallel Slave Port for external memory expansion and a programmable low-voltage detection (LVD) module. The OTP memory model suits prototyping and low-to-mid volume production where field firmware updates are not required.
Typical applications include industrial control logic, sensor signal conditioning, low-power data acquisition, motor control driver boards, and educational embedded platforms. Its wide operating voltage range supports both 3.3 V and 5 V rails commonly found in legacy industrial and consumer designs. The DIP-40 package enables easy breadboarding and hand-soldering for prototypes and hobbyist projects.
When designing with this device, choose the LC variant when battery operation is required; the standard PIC18C452 has a tighter voltage range. Ensure the MCLR reset circuit includes the recommended 10 kΩ pull-up and decoupling capacitor, and configure the CONFIG fuses during programming to lock peripheral features. This page synthesizes Microchip-anchored specifications, distributor pricing, and drop-in alternatives from the same PIC18 family not found on a single manufacturer page.
Bộ thay thế dễ dàng lắp đặt cho PIC18LC452-I/P — 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 PIC18LC452-I/P (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, Timers, RoHS Status.
PIC18F452-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F45K22-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F458-E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4685-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4620-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F46K22-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18LC452-I/P Tỷ lệ tối đa & tính chất điện
| Product Family | PIC18C Series (PIC18LC452) |
| Core Architecture | 8-bit RISC (PIC18 Harvard) |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 1536 bytes |
| Data EEPROM | Not present on OTP PIC18C452 family |
| Maximum CPU Frequency | 40 MHz |
| Instruction Cycle Time | 100 ns (10 MIPS) |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| ADC | 10-bit, up to 8 channels |
| Timers | Timer0 (8/16-bit), Timer1 (16-bit), Timer2 (8-bit), Timer3 (16-bit) |
| Capture/Compare/PWM | 2 CCP modules |
| Serial Interfaces | USART, SPI, I2C-compatible synchronous port |
| Hộp | 40-pin PDIP (0.600 in, 15.24 mm) |
| Kiểu lắp đặt | Through-Hole |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| I/O Sink/Source Current | 25 mA / 25 mA |
| External Interrupts | 3 |
| Trạng thái RoHS | Compliant (lead-free) |
Cấu hình chân PIC18LC452-I/P
| Chân 1 | MCLR — Master Clear (Reset) input, internal pull-up enabled by configuration |
| 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 / Parallel Slave Port Read / Analog input 5 |
| Chân 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel Slave Port Write / Analog input 6 |
| Chân 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel Slave Port Chip Select / Analog input 7 |
| Chân 11 | OSC2/CLKO/RA6 — Oscillator output / Clock output / PORTA bit 6 |
| Chân 12 | OSC1/CLKI/RA7 — Oscillator input / Clock input / PORTA bit 7 |
| Chân 13 | VSS — Ground reference |
| Chân 14 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| 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 output |
| Chân 17 | RC2/CCP1 — PORTC bit 2 / CCP1 output |
| 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 transmit / USART clock |
| Chân 26 | RC7/RX/DT — PORTC bit 7 / USART receive / 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 — Ground reference |
| Chân 32 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| 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/CCP2 — PORTB bit 3 / CCP2 alternate pin |
| Chân 37 | RB4 — PORTB bit 4 |
| Chân 38 | RB5 — PORTB bit 5 |
| Chân 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 40 | RB7/PGD — PORTB bit 7 / ICSP data |
Ứng dụng tiêu biểu
PIC18LC452-I/P phù hợp cho 6 Áp dụngs: Industrial Control Logic, Low-Power Data Acquisition, Motor Control and PWM Driver Boards, Sensor Signal Conditioning Hub, Educational Embedded Platform, Legacy Embedded Upgrade Path.
Industrial Control Logic
The PIC18LC452-I/P fits industrial control logic boards because its 32 KB OTP program memory, 1536-byte RAM, and 40 MHz PIC18 core deliver 10 MIPS deterministic execution for state-machine control. The 34 digital I/O pins, 25 mA sink/source capability, and 2.0-5.5 V supply range support direct interfacing with 5 V relays, optocouplers, and 24 V PLC-style signal conditioning. Designers benefit from three external interrupts and four hardware timers for precise pulse counting and PWM generation in conveyor, motor start/stop, and process-control logic. The PDIP-40 package is well-suited to legacy factory equipment controllers where through-hole replacement simplifies field servicing.
Được đề xuất
Low-Power Data Acquisition
The PIC18LC452-I/P suits low-power data acquisition front-ends thanks to its low-power CMOS (LC) process node that operates down to 2.0 V, plus its 10-bit ADC with up to 8 input channels. The 1536-byte RAM buffers sample streams for sensor logging, while the USART streams data out to a host MCU or wireless module. Compared to the standard PIC18C452, the LC variant draws substantially less quiescent current, making it a strong fit for battery-powered environmental monitors and portable instrumentation where deterministic 10 MIPS execution is needed for sample-rate management.
Được đề xuất
Motor Control and PWM Driver Boards
The PIC18LC452-I/P is well-matched to small motor driver boards because its dual Capture/Compare/PWM (CCP) modules and four hardware timers generate complementary PWM waveforms for brushed DC, unipolar stepper, and small BLDC drivers. The 25 mA I/O sink/source capability directly drives logic-level FET gate drivers, while the 10 MIPS throughput sustains field-oriented control loops on small three-phase motors. The wide 2.0-5.5 V supply range supports both 3.3 V and 5 V driver rails, and the PDIP-40 package simplifies lab prototyping and hobbyist CNC / 3D-printer controller builds.
Được đề xuất
Sensor Signal Conditioning Hub
The PIC18LC452-I/P operates as a sensor signal conditioning hub in multi-sensor systems because its 10-bit ADC with up to 8 input channels multiplexes analog signals from thermistors, RTDs, photocells, and strain gauges, while its SPI/I2C ports read digital sensors simultaneously. The 1536-byte RAM accommodates Kalman or moving-average filter state, and the 10 MIPS throughput runs the filter in real time before the USART streams results. Its 2.0 V minimum supply accommodates 3.3 V sensor rails, and the PIC18LC452's 25 mA I/O drive capability directly energizes sensor excitation circuits without external buffers.
Được đề xuất
Educational Embedded Platform
The PIC18LC452-I/P remains a popular educational embedded platform because its 40-pin PDIP through-hole form factor accepts standard breadboards and is hand-solderable by students, while its PIC18 instruction set exposes advanced features like hardware multiply and a 31-level stack. With 32 KB OTP program memory and 1536-byte RAM, students can complete realistic C-compiler projects covering ADC, PWM, USART, and I2C peripherals. The 40 MHz clock supports real-time lab demonstrations, and the wide supply range simplifies 3.3 V / 5 V dual-rail labs. Migrating to the flash-based PIC18F452-I/P is straightforward when student projects require in-circuit reprogramming.
Được đề xuất
Legacy Embedded Upgrade Path
The PIC18LC452-I/P serves legacy embedded products where PIC16C7X designs are being upgraded to the PIC18 architecture with code-compatible source. Per the datasheet, the 40-pin PDIP pinout is pin-compatible with PIC16C7X devices, allowing existing PCB layouts to be reused without re-spin. The OTP memory model suits single-program industrial products like vending machines, HVAC controllers, and security panels where firmware is factory-burned and never field-updated. Designers updating legacy PIC16C7X firmware to PIC18 gain higher 10 MIPS throughput, additional timers, and CCP modules while retaining the same I/O pin assignments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LC452-I/P — 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 | PIC18F452-I/P | PIC18F45K22-I/P | PIC18F458-E/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-40 | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same |
| Program Memory Type | OTP (32 KB) | Flash (32 KB) | Flash (32 KB) | Flash (32 KB) + 256 B EEPROM |
| RAM Size | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes |
| Maximum CPU Frequency | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 64 MHz (16 MIPS) | 40 MHz (10 MIPS) |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 1.8 V to 5.5 V | 2.0 V to 5.5 V |
| I/O Pins | 34 | 34 | 34 | 34 |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 28 channels | 10-bit, 8 channels |
| In-Circuit Reprogrammable | No (OTP) | Yes (flash) | Yes (flash) | Yes (flash) |
| Lifecycle Status | NRND | Active | Active | Active |
Bảo phân biệt quan trọng
- Pin-compatible flash migration path (vsPIC18F452-I/P)
- Lower minimum operating voltage for battery designs (vsPIC18C452-I/P (non-LC))
- Higher MIPS and richer peripherals for future upgrades (vsPIC18F45K22-I/P)
Ghi chú thiết kế
The PIC18LC452-I/P operates from 2.0 V to 5.5 V; place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 14 and 32) and a bulk 10 uF tantalum or ceramic capacitor at the board power-entry. For battery-powered designs, take advantage of the LC process node's low quiescent current by using the SLEEP instruction with the Watchdog Timer and a low-power Timer1 oscillator on RA6/RA7 (T1OSI/T1OSO) to wake the MCU periodically. Estimated: at 3.3 V VDD with 10 MHz clock, active current is approximately 11 mA and SLEEP current is below 2 uA per the LC datasheet.
The PDIP-40 footprint accepts standard through-hole 0.600-inch-wide DIP sockets for development and hand-prototyping. Place a 10 kΩ pull-up resistor on MCLR (pin 1) and add a 100 nF capacitor from MCLR to VSS to filter reset noise; for ICSP programming, expose RB6/PGC (pin 39) and RB7/PGD (pin 40) on a 6-pin header per Microchip's ICSP specification. Keep the analog AVdd/AVss traces short and shielded if using the ADC; the VREF+ and VREF- pins (RA3/RA2) should be bypassed with 100 nF capacitors when an external reference is used.
Do not confuse PIC18LC452-I/P (OTP, low-power CMOS) with PIC18C452-I/P (non-LC OTP) or PIC18F452-I/P (flash). The LC suffix specifically denotes the 2.0 V minimum supply variant. Note that PIC18C452 family parts lack data EEPROM, so designers requiring non-volatile data storage must either use external I2C EEPROM (e.g., 24LC256) or migrate to the flash-based PIC18F45K22-I/P which has integrated EEPROM. Because the part is NRND as of 2026-09-28, new designs should default to the PIC18F452-I/P or PIC18F45K22-I/P unless OTP is a hard requirement.
Thông tin tuân thủ
RoHS-compliant per Microchip product page; not AEC-Q100 qualified. Designed for industrial embedded applications rather than automotive safety-critical systems.
