PIC18LF4539-I/P - 8-bit PIC MCU, 24KB Flash, 40MHz, 40-PDIP | Microchip
N.º da peça: PIC18LF4539-I/P ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $9.2 | $9,20 |
| 10 | $8.4 | $84,00 |
| 100 | $7.65 | $765,00 |
| 500 | $6.95 | $3.475,00 |
| 1.000 | $6.3 | $6.300,00 |
PIC18LF4539-I/P Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), non-volatile storage (EEPROM), and a rich set of peripheral interfaces such as timers, ADC, communication buses (UART, SPI, I2C), and general-purpose I/O. The PIC18 family uses a modified Harvard architecture with separate program and data buses, enabling single-cycle instruction execution and predictable interrupt latency. Within this hierarchy the PIC18LF4539 belongs to the 24-pin/40-pin/44-pin high-performance enhanced-flash family with nanoWatt power-management technology for sleep-mode current optimization.
Key differentiating features of the PIC18LF4539 include a 10-bit ADC with up to 8 input channels, a 10-bit PWM module with enhanced resolution (up to 14-bit), a USART with LIN support, an MSSP (SPI/I2C) peripheral, a 16-bit timer/counter, two 8-bit timers, a watchdog timer with its own on-chip RC oscillator, and nanoWatt Technology that provides multiple idle and sleep modes drawing microampere-level currents. The 40-pin PDIP format remains the package of choice for legacy designs, breadboard prototyping, educational platforms, and through-hole industrial control modules where surface-mount assembly is not practical.
The wide 2.0V to 5.5V operating range combined with internal oscillator options and the nanoWatt feature set makes the PIC18LF4539-I/P particularly well suited to mains-powered and battery-backed systems that must tolerate slow power-rail transitions. The device is also supported by Microchip's MPLAB X IDE, MPLAB XC8 compiler, and a large ecosystem of application notes, firmware libraries, and development tools.
Typical applications include industrial control and automation, sensor-interface front-ends, low-power remote sensors, white-goods and HVAC user-interface controllers, automotive body-comfort modules (non-safety), and educational or hobbyist embedded platforms where through-hole assembly is preferred. When designing with this part, ensure decoupling is placed close to VDD/VSS pins and that unused I/O lines are configured as outputs to minimize quiescent current in sleep modes. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the Microchip datasheet alone.
Alternativas drop-in para PIC18LF4539-I/P — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC18LF4539-I/P (mesmo formato e footprint) — diferindo em Operating Temperature, Package, Mounting Type, Core Architecture, Program Memory (Flash).
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F4539-I/P
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF4439-I/P
✅ Drop-In✓ Em estoque
$4.65 / unidade
Ver ficha técnica →PIC18F4439-I/PT
✅ Drop-In✓ Em estoque
$5.05 / unidade
Ver ficha técnica →PIC18F4539-I/PT
✅ Drop-In✓ Em estoque
$5.85 / unidade
Ver ficha técnica →PIC18LF4539-I/ML
✅ Drop-In✓ Em estoque
$4.3 / unidade
Ver ficha técnica →PIC18LF4539-I/P Classificações máximas e características elétricas
| Core Architecture | PIC18 8-bit RISC (enhanced Harvard) |
| Program Memory (Flash) | 24 KB (12K x 16) |
| Data RAM | 1408 bytes |
| Data EEPROM | 256 bytes |
| Frequência máxima de clock | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| Temperatura de operação | -40 C to +85 C (Industrial) |
| I/O Pins | 34 |
| ADC | 10-bit, up to 8 channels |
| PWM | 10-bit with enhanced resolution up to 14-bit |
| Timers | 1 x 16-bit + 2 x 8-bit + WDT |
| Communication Peripherals | 1 x USART (LIN capable), 1 x MSSP (SPI/I2C) |
| Encapsulamento | 40-pin PDIP (DIP-40, P) |
| Tipo de montagem | Through-Hole |
| Power-Saving Modes | nanoWatt Technology (Idle, Sleep, Deep Sleep) |
| Instruction Set | PIC18 extended instruction set (77 instructions) |
| ICSP / ICD Support | Yes (In-Circuit Serial Programming / In-Circuit Debugger) |
| Status RoHS | Compliant (lead-free) |
Configuração de pinos do PIC18LF4539-I/P
| Pino 1 | MCLR — Master Clear (Reset) input, active low |
| Pino 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pino 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pino 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC VREF- |
| Pino 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Pino 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pino 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Pino 8 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Pino 9 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Pino 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pino 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 PWM output |
| Pino 12 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pino 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pino 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pino 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pino 16 | RC6/TX/CK — PORTC bit 6 / USART async transmit / clock |
| Pino 17 | RC7/RX/DT — PORTC bit 7 / USART async receive / data |
| Pino 18 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Pino 19 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Pino 20 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Pino 21 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Pino 22 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Pino 23 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Pino 24 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Pino 25 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Pino 26 | RE0/RD — PORTE bit 0 / Parallel Slave Port read control |
| Pino 27 | RE1/WR — PORTE bit 1 / Parallel Slave Port write control |
| Pino 28 | RE2/CS — PORTE bit 2 / Parallel Slave Port chip select |
| Pino 29 | VDD — Positive supply voltage (2.0V-5.5V) |
| Pino 30 | VSS — Ground reference |
| Pino 31 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| Pino 32 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Pino 33 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Pino 34 | RB3/CCP2 — PORTB bit 3 / CCP2 PWM output (alternate) |
| Pino 35 | RB4 — PORTB bit 4 |
| Pino 36 | RB5/PGM — PORTB bit 5 / Low-voltage ICSP programming |
| Pino 37 | RB6/PGC — PORTB bit 6 / In-circuit debugger clock |
| Pino 38 | RB7/PGD — PORTB bit 7 / In-circuit debugger data |
| Pino 39 | VDD — Positive supply voltage (2.0V-5.5V) |
| Pino 40 | VSS — Ground reference |
Aplicações típicas
PIC18LF4539-I/P é adequado para 6 aplicaçãos: Industrial Control and Automation, Sensor Interface Front-Ends, Battery-Backed Remote Monitoring, White-Goods and HVAC User Interfaces, Automotive Body-Comfort Modules, Educational and Hobbyist Embedded Platforms.
Industrial Control and Automation
The PIC18LF4539-I/P is widely used in industrial control and automation systems, particularly PLC input/output modules, motor-driver front-ends, and conveyor-belt controllers. Its 2.0V-5.5V supply range tolerates slow power-rail transitions common in factory backplanes, while the 10-bit ADC with up to 8 channels digitizes analog sensor outputs such as temperature, pressure, and flow. The 40MHz core delivers 10 MIPS of deterministic throughput required for closed-loop control loops, and the 40-PDIP package simplifies through-hole field replacement. The enhanced PWM module with up to 14-bit resolution enables fine-grained control of brushless DC and stepper motors, while the nanoWatt sleep modes extend the operating life of battery-backed controllers during mains outages.
Recomendado
Sensor Interface Front-Ends
Sensor-interface front-ends benefit from the PIC18LF4539-I/P's wide supply range, 10-bit ADC, and USART/MSSP peripherals that connect to UART, SPI, and I2C sensors. A typical signal-conditioning board uses the MCU to digitize bridge, RTD, or thermocouple signals, apply linearization firmware, and forward the result over RS-485 or I2C to a host controller. The 1408-byte RAM is sufficient for circular sensor-data buffers and modest FIR-filter implementations, while the 256-byte EEPROM stores calibration coefficients. The 40-PDIP through-hole package is preferred in laboratory-instrument and process-control designs where manual rework and replacement are routine.
Recomendado
Battery-Backed Remote Monitoring
Battery-backed remote-monitoring equipment such as data loggers, environmental sensors, and irrigation controllers leverage the PIC18LF4539-I/P's 2.0V minimum supply and nanoWatt sleep modes drawing microampere-level currents. The MCU periodically wakes from sleep, samples sensors via the ADC, writes the data to internal EEPROM, and re-enters sleep, achieving multi-year battery life on two AA cells. The wide voltage range ensures accurate ADC readings even as the battery discharges toward 2.0V. The on-chip USART (LIN-capable) and MSSP (SPI/I2C) provide flexible connectivity to wireless modules such as LoRa, Sigfox, or sub-GHz transceivers when remote uplink is required.
Recomendado
White-Goods and HVAC User Interfaces
White-goods appliances such as washing machines, dishwashers, refrigerators, and HVAC thermostats rely on the PIC18LF4539-I/P for user-interface control: scanning keypads, driving LED/LCD displays, and commanding relays or triacs. The 34 I/O pins comfortably support 4x4 key matrices, 7-segment or character LCDs, and several indicator LEDs. The enhanced PWM module produces buzzer tones and proportional control signals for fans and dampers, while the 10-bit ADC reads NTC temperature sensors and potentiometer setpoints. The 40-PDIP package survives the higher humidity and thermal-cycling environment of household appliances, and the industrial -40C to +85C temperature grade ensures reliable operation in unconditioned spaces.
Recomendado
Automotive Body-Comfort Modules
Non-safety automotive body-comfort subsystems such as seat controllers, mirror adjusters, and interior-lighting drivers frequently use the PIC18LF4539-I/P (or its automotive-qualified PIC18F4539-I/P sibling). The MCU's enhanced PWM outputs drive small DC motors and LED strings with up to 14-bit resolution, while the LIN-capable USART interfaces with the vehicle's body-control network. The 40-PDIP form factor is convenient for prototyping and low-volume specialty-vehicle production, though surface-mount variants (PIC18LF4539-I/ML in QFN-44) are preferred for high-volume manufacturing. For safety-critical applications such as airbag or ABS controllers, automotive-grade PIC18 variants with explicit AEC-Q100 qualification should be selected instead.
Recomendado
Educational and Hobbyist Embedded Platforms
The PIC18LF4539-I/P is a popular choice for university embedded-systems courses and hobbyist projects because of its through-hole 40-PDIP package, breadboard compatibility, and extensive Microchip documentation. The MPLAB X IDE, MPLAB XC8 compiler, and PICkit 4 debugger form a free or low-cost tool chain supported on Windows, macOS, and Linux. The PIC18 instruction set is documented in datasheet section 27, and hundreds of application notes walk students through ADC, PWM, USART, I2C, and SPI projects. The PIC's deterministic instruction timing makes it an excellent teaching platform for real-time operating systems, interrupts, and assembly-language fundamentals before students graduate to ARM Cortex-M devices.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF4539-I/P — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18F4539-I/P | PIC18LF4439-I/P | PIC18F4439-I/P | PIC18F4539-I/PT | PIC18LF4539-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-PDIP (DIP-40) | 40-PDIP (DIP-40) - same | 40-PDIP (DIP-40) - same | 40-PDIP (DIP-40) - same | TQFP-44 - different | QFN-44 - different |
| Supply Voltage | 2.0V to 5.5V | 4.2V to 5.5V | 2.0V to 5.5V | 4.2V to 5.5V | 4.2V to 5.5V | 2.0V to 5.5V |
| Flash Memory | 24 KB | 24 KB | 16 KB | 16 KB | 24 KB | 24 KB |
| Maximum Clock | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Pins | 34 | 34 | 34 | 34 | 36 | 36 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| USB Peripheral | No | No | No | No | No | No |
Principais diferenciais
- Wide 2.0V to 5.5V supply range with full peripheral operation (vs PIC18F4539-I/P)
- 24KB Flash vs 16KB on smaller siblings (vs PIC18LF4439-I/P)
- Through-hole 40-PDIP package for legacy, breadboard, and field-replaceable designs (vs PIC18F4539-I/PT (TQFP-44))
Notas de projeto
The PIC18LF4539-I/P integrates nanoWatt Technology with multiple idle and sleep modes. To minimize quiescent current in battery-backed designs, place the MCU in Sleep mode (CPU halted, peripherals off) and wake via Watchdog Timer overflow, external interrupt on INT0/INT1/INT2, or peripheral interrupt. Configure all unused I/O pins as outputs (driving low) rather than inputs to avoid floating-pin current paths. A 100 nF decoupling capacitor must be placed within 5 mm of each VDD/VSS pair (pins 11/12 and 31/40); a bulk 10 uF tantalum or ceramic capacitor on the main supply rail is recommended for motor-driven and relay-switched loads.
For the 40-PDIP package, place decoupling capacitors as close as physically possible to the VDD/VSS pairs (pins 11/12 and 31/40). Keep the crystal oscillator traces (OSC1/OSC2, pins 8/9) short, symmetrical, and surrounded by a ground guard ring; the on-chip PLL is sensitive to capacitive loading above 20 pF. The MCLR pin (pin 1) requires a 10 kohm pull-up to VDD; do not leave it floating, or the MCU may intermittently reset. For ICD debugging, dedicate RB6 (PGC) and RB7 (PGD) for ICSP and ensure no series resistors > 100 ohm are inserted on these lines, or programming will fail.
Common pitfalls when designing with PIC18LF4539-I/P include: (1) confusing the LF (2.0V-5.5V) and F (4.2V-5.5V) variants - the F part will fail to start at 3.3V; (2) attempting to drive large capacitive loads (above 50 pF) on OSC2 without a buffer; (3) using analog inputs without configuring the TRISA register - all PORTA pins default to analog mode after reset; (4) exceeding the 25 mA source/sink limit per I/O pin or 200 mA per port, which will degrade the pin; (5) forgetting the configuration bits - CONFIG1L must specify the oscillator mode (HS for >4MHz crystal, XT for 1-4MHz, LP for 32 kHz, RC for low-cost RC oscillator).
Informações de conformidade
RoHS compliant and lead-free per Microchip product page; the LF variant carries a wider operating voltage than the F variant. Not AEC-Q100 qualified - for automotive safety applications, select an AEC-Q100-qualified PIC18 device.
