PIC18LF2539-I/SP - 8-Bit 40MHz MCU 24KB Flash 28-SPDIP | Microchip
MPN: PIC18LF2539-I/SP ✓ Hoạt độngPIC18LF2539-I/SP Tóm tắt
An 8-bit microcontroller (MCU) is a programmable single-chip processor that combines a CPU, non-volatile program memory (Flash/ROM), volatile data memory (RAM), and peripheral interfaces on one die. PIC18 devices sit within a hierarchy of microcontroller architectures: PIC10/12/14/16/18 family -> 8-bit MCU class -> microcontroller -> embedded IC -> semiconductor. The PIC18 architecture is the high-end 8-bit line of Microchip's portfolio, featuring a 16-bit instruction word for improved code density, hardware multiplier for DSP-style operations, and up to 16 MIPS execution speed.
Key specifications include 40 MHz maximum clock with 10 MIPS sustained throughput, 21 digital I/O pins (per Mouser listing) capable of source/sink 25 mA each, an internal 8 MHz oscillator, and Flash self-programming support via In-Circuit Serial Programming (ICSP). The -LF low-voltage variant enables direct Li-Ion battery operation without external regulation. Brown-out Reset (BOR), Power-on Reset (POR), Watchdog Timer (WDT), and an enhanced instruction set with C-compiler friendly architecture round out the core feature set.
Typical applications include industrial control (sensor conditioning via 10-bit ADC, motor control via ECCP module), automotive body electronics and HMI (HVAC, lighting), consumer appliances with user interfaces, low-power remote sensor nodes, and USB/serial-interface embedded products using the USART module. The 28-SPDIP package is selected for through-hole prototyping, breadboarding, educational platforms, and designs requiring easy rework or hand-soldering.
When designing with this device, ensure the configuration bits (fuses) and oscillator selection are correct for the chosen clock source. For low-power battery applications, take advantage of the LF voltage range and use Sleep mode with WDT or external interrupts to minimize current draw to microampere levels.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF2539-I/SP — 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 PIC18LF2539-I/SP (cùng hình factor và footprint) — khác nhau ở ADC, Mounting Type, I/O Pins, Package, Operating Temperature.
PIC18LF2539T-I/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF2539-I/SPG
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF2523-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2539-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2539-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF2539-I/SP Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (Enhanced Harvard) |
| Program Memory | 24 KB Flash (12K x 16) |
| RAM | 1408 bytes |
| Tần số xung maksimum | 40 MHz |
| Instruction Throughput | 10 MIPS |
| Supply Voltage (LF variant) | 2.0 V to 5.5 V |
| I/O Pins | 21 (digital, source/sink 25 mA) |
| ADC | 10-bit integrated |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C (Industrial) |
| Package Type | 28-SPDIP (Skinny Plastic DIP, through-hole) |
| Số chân | 28 |
| Kiểu lắp đặt | Through-Hole |
| In-Circuit Programming | ICSP (high-voltage and low-voltage) |
| ROM Type | Flash (self-programmable) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18LF2539-I/SP
| Chân 1 | MCLR/VPP/RE3 — Master Clear (active low) / ICSP programming voltage / PORTE pin 3 |
| Chân 2 | RA0 — PORTA0 (digital I/O, ADC analog channel 0) |
| Chân 3 | RA1 — PORTA1 (digital I/O, ADC analog channel 1) |
| Chân 4 | RA2 — PORTA2 (digital I/O, ADC analog channel 2) |
| Chân 5 | RA3 — PORTA3 (digital I/O, ADC analog channel 3) |
| Chân 6 | RA4 — PORTA4 (digital I/O, ADC analog channel 4) |
| Chân 7 | RA5 — PORTA5 (digital I/O, ADC analog channel 5) |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC2/RA6 — Oscillator output / PORTA6 digital I/O |
| Chân 10 | OSC1/RA7 — Oscillator input / PORTA7 digital I/O |
| Chân 11 | RC0 — PORTC0 (digital I/O) |
| Chân 12 | RC1 — PORTC1 (digital I/O) |
| Chân 13 | RC2 — PORTC2 (digital I/O, ECCP1) |
| Chân 14 | RC3 — PORTC3 (digital I/O, ECCP1) |
| Chân 15 | RC4 — PORTC4 (digital I/O, USB D-) |
| Chân 16 | RC5 — PORTC5 (digital I/O, USB D+) |
| Chân 17 | RC6 — PORTC6 (digital I/O, TX/CK for EUSART) |
| Chân 18 | RC7 — PORTC7 (digital I/O, RX/DT for EUSART) |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive power supply (2.0 V to 5.5 V for LF variant) |
| Chân 21 | RB0 — PORTB0 (digital I/O, INT0) |
| Chân 22 | RB1 — PORTB1 (digital I/O, INT1) |
| Chân 23 | RB2 — PORTB2 (digital I/O) |
| Chân 24 | RB3 — PORTB3 (digital I/O, ECCP2) |
| Chân 25 | RB4 — PORTB4 (digital I/O) |
| Chân 26 | RB5 — PORTB5 (digital I/O) |
| Chân 27 | RB6 — PORTB6 (digital I/O, ICSPCLK for ICSP) |
| Chân 28 | RB7 — PORTB7 (digital I/O, ICSPDAT for ICSP) |
Ứng dụng tiêu biểu
PIC18LF2539-I/SP phù hợp cho 7 Áp dụngs: Industrial Sensor Conditioning, Battery-Powered Remote Sensor Node, Automotive Body Electronics HMI, Consumer Appliance Control, USB-to-Serial Bridge / Data Logger, Educational Platform / Prototyping Board, Home Automation Sensor Hub.
Industrial Sensor Conditioning
The PIC18LF2539-I/SP fits industrial sensor conditioning applications thanks to its integrated 10-bit ADC, 21 digital I/O, and 2.0-5.5 V operating range that handles 3.3 V sensor rails directly. The 24 KB Flash is large enough for calibration tables, linearization routines and a small command interpreter. Brown-out Reset plus industrial -40 °C to +85 °C rating handle factory floor conditions without additional supervisory hardware. Engineers typically pair it with external op-amps for thermocouple or strain-gauge front-ends.
Được đề xuất
Battery-Powered Remote Sensor Node
The LF-prefixed 2.0-5.5 V supply range of the PIC18LF2539-I/SP lets it run directly from a single-cell Li-Ion or two AA cells, eliminating a boost/LDO regulator in low-power wireless sensor nodes. Sleep currents drop into the microampere range when peripherals are gated off, and the Watchdog Timer with internal 31 kHz oscillator keeps time-keeping duty cycle low. The 1408 bytes RAM is sufficient for tiny TCP/IP stacks, LoRaWAN sessions or BLE-beacon payload assembly with no external SRAM.
Được đề xuất
Automotive Body Electronics HMI
In cabin body-electronics HMI such as HVAC panel controls, mirror adjusters and lighting modules, the PIC18LF2539-I/SP provides 21 source/sink 25 mA I/O to drive relays and LED matrices directly without buffers. The PIC18 enhanced instruction set and 10 MIPS throughput deliver responsive switch debounce and PWM dimming while leaving headroom for LIN-style UART protocols on the USART. Its industrial temperature rating covers cabin environments; for underhood use, choose the extended grade variant.
Được đề xuất
Consumer Appliance Control
The 28-SPDIP through-hole package of the PIC18LF2539-I/SP is ideal for consumer appliances with hand-solderable boards and easy serviceability, including small kitchen appliances and white-goods user interfaces. The 24 KB Flash comfortably hosts state-machine control logic, soft-start ramps and user-interface state tables. With its 10-bit ADC it can read potentiometers and NTC sensors directly, while ECCP modules generate zero-cross triac-fire pulses for motor or heater regulation in 120/230 V mains systems.
Được đề xuất
USB-to-Serial Bridge / Data Logger
With its enhanced USART and I2C/SPI peripherals, the PIC18LF2539-I/SP is widely used in serial data loggers, RS-232/RS-485 bridges and bridge-protocol converters in the lab and field. The 1408 bytes RAM and 24 KB Flash support packet buffering and small protocol stacks, while 25 mA I/O drive indicator LEDs directly. Its Flash self-programmability lets firmware be updated in the field via bootloader without removing the chip from its logger enclosure.
Được đề xuất
Educational Platform / Prototyping Board
The PIC18LF2539-I/SP in through-hole 28-SPDIP is a staple for university microcontroller courses, hobbyist robots and breadboard prototyping because its 0.1 inch pin pitch fits standard perfboards and IC sockets. With MPLAB X IDE, XC8 compiler and a PICkit programmer, students can develop code at 10 MIPS using the C-friendly enhanced instruction set. The device's low-voltage range and integrated peripherals eliminate external regulator and glue logic, keeping the BOM minimal for first prototypes.
Được đề xuất
Home Automation Sensor Hub
The PIC18LF2539-I/SP suits small home-automation hubs that aggregate data from multiple low-speed sensor interfaces (one-wire temperature, I2C humidity, SPI e-paper). Its 21 I/O channels drive multiple peripherals directly, and Flash self-programming enables OTA-style firmware updates triggered by a master controller. The LF voltage range supports battery-backed RTC designs for time-stamped event logging in security and energy monitoring applications across residential and small-commercial sites.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF2539-I/SP — 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 | PIC18LF2539T-I/SP | PIC18LF2539-I/SPG | PIC18LF2523-I/SP | PIC18F2539-I/SP | PIC18F2539-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP | 28-SPDIP (same) | 28-SPDIP (same) | 28-SPDIP (same) | 28-SPDIP (same) | 28-SOIC (surface-mount footprint) |
| Program Memory (Flash) | 24 KB | 24 KB | 24 KB | 16 KB | 24 KB | 24 KB |
| RAM | 1408 bytes | 1408 bytes | 1408 bytes | 1536 bytes | 1408 bytes | 1408 bytes |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Supply Voltage Range (LF vs F) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
| I/O Pins | 21 | 21 | 21 | 21 | 21 | 23 (SO-28 has 2 more GPIO) |
| ADC Channels | 10-bit integrated | 10-bit integrated | 10-bit integrated | 10-bit integrated | 10-bit integrated | 10-bit integrated |
| Temperature Grade | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C | Industrial -40 °C to +85 °C |
| Pricing (1 pc, approximate, as of 2026-09-28) | $3.10 - $3.20 | Similar | Similar | Slightly lower | Similar | Similar |
Bảo phân biệt quan trọng
- Wider voltage operating range than the F variant (vsPIC18F2539-I/SP)
- Larger program memory than PIC18LF2523-I/SP (vsPIC18LF2523-I/SP)
- Through-hole SPDIP package ideal for prototyping (vsPIC18F2539-I/SO)
Ghi chú thiết kế
This part uses an internal 5 V or 3.3 V regulator that draws current from the VDD pin. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of pin 20, plus a bulk 10 µF tantalum or aluminum polymer on the main supply rail. If the design sources from a switching converter, add a ferrite bead and 10 µF cap to suppress switching noise from corrupting the internal regulator reference. Estimated: VDD current draw at 40 MHz is approximately 16 mA at 5 V from the datasheet DC characteristics.
Place the decoupling capacitor as close to the VDD/VSS pins as physically possible on both pin pairs - the high-frequency transient current path during clock-edge transitions is short and wide. Route the crystal traces (OSC1/OSC2) symmetrically to the part pins with a ground guard trace around them. Keep the ICSP programming header (RB6/RB7/MCLR) physically accessible to avoid removing the MCU for production programming.
Estimated: At 40 MHz operation with all peripherals enabled, the PIC18LF2539-I/SP draws roughly 16-25 mA from a 5 V supply, dissipating only 80-125 mW - well within the SPDIP thermal envelope (theta_JA approximately 80 °C/W for through-hole DIP), so no heatsink is needed. Junction temperature rise above 25 °C ambient is 6-10 °C. If Sleep mode is used for power saving, the LVD/BOR module may still draw a few hundred µA which should be considered in battery-life calculations.
Do not forget to configure the configuration bits (fuses) for the desired oscillator, BOR threshold, watchdog enable and code protection. Configuration bits are read at every reset and ignoring them causes bootloader or startup failures. Avoid tying ICSPDAT/ICSPCLK directly to high-current loads - these pins are 5 V tolerant but lack 25 mA drive strength and any shared load can break programming. Finally, always budget watchdog timer reset periods correctly when using long algorithm loops.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip material declarations; not AEC-Q100 qualified - for automotive applications requiring AEC-Q100 grade, choose a specifically qualified part number.
