PIC18LF25J11-I/SP - 32KB Flash MCU, 4KB RAM, 12 MIPS nanoWatt | Microchip
MPN: PIC18LF25J11-I/SP ✓ Hoạt độngPIC18LF25J11-I/SP Tóm tắt
What is a PIC microcontroller? PIC (Peripheral Interface Controller) is a family of 8-bit Harvard-architecture RISC microcontrollers from Microchip. PIC18 series parts add enhanced 16-bit-wide instructions, hardware multiply and C-compiler-friendly addressing; the "J" sub-family targets low-voltage battery-powered designs with nanoWatt sleep modes. Within this taxonomy, the PIC18LF25J11 sits as: 8-bit MCU -> PIC18 family -> J-series low-voltage line -> nanoWatt power-managed sub-line -> 28-pin SPDIP form factor.
Key features include 32 KB self-programmable Flash program memory, 4 KB SRAM, 256 bytes of EEPROM-style data, 34 digital I/O pins multiplexed with analog and peripheral functions, a 10-bit ADC with up to 13 input channels, two analog comparators, two USART modules, two MSSP (SPI/I2C) modules, two CCP modules, an 8-bit/16-bit timer block and a 10-bit ADC providing roughly 3.2 mV LSB at a 3.3 V reference.
Architecturally, the PIC18LF25J11 uses a 16-bit-wide instruction word, an 8-level hardware stack, a priority interrupt controller and a nanoWatt power manager with multiple low-power sleep modes. The LF silicon revises the analog and oscillator blocks for low-voltage operation, while sharing the same peripheral set as the 5V PIC18F25J11.
Typical applications include USB-LCD modules, smart-card readers, tethered wearables, sensor interfaces for industrial control, low-power data loggers and battery-powered consumer peripherals. The combination of nanoWatt sleep, 32 KB code space and 4 KB RAM is well matched to RTOS-light protocols such as Modbus-RTU over RS-485 or I2C-based sensor hubs.
A core design consideration is supply rail discipline: although the LF device is qualified for 2.0V-3.3.6V, 5V-tolerant I/O behavior must be confirmed against the latest datasheet revision before stacking with legacy 5V sensors. Designers should also budget for the 28-pin SPDIP through-hole footprint, which favours prototyping and rugged industrial enclosures over miniaturized wearables.
This page synthesizes distributor pricing, same-family drop-in alternatives sourced from Microchip's published catalog, and practical design notes not typically surfaced by manufacturer datasheets alone.
Bộ thay thế dễ dàng lắp đặt cho PIC18LF25J11-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 PIC18LF25J11-I/SP (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core Architecture, Operating Temperature, Timers.
PIC18F25J11-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF24J11-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF25J10-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18LF45J11-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F46J50-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18LF25J11-I/SP Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC18 RISC (Harvard, 16-bit instruction word) |
| Program Memory (Flash) | 32 KB |
| SRAM | 4 KB |
| Data EEPROM | 256 bytes (emulated) |
| Maximum CPU Speed | 40 MHz (12 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V (LF low-voltage variant) |
| Number of I/O Pins | 34 |
| ADC | 10-bit, up to 13 channels |
| ADC LSB @ 3.3 V | 3.2 mV (typ.) |
| Analog Comparators | 2 |
| USART | 2 |
| MSSP (SPI/I2C) | 2 |
| CCP Modules | 2 |
| Timers | Multiple 8-bit and 16-bit timers |
| Hộp | SPDIP-28 (SP), through-hole |
| Nhiệt độ hoạt động | -40C to +85C (Industrial -I) |
| Low-Power Modes | nanoWatt sleep, run, idle, and deep sleep |
| Trạng thái RoHS | Compliant |
| Lead-Free / Halogen-Free | Per Microchip product page |
Cấu hình chân PIC18LF25J11-I/SP
| Chân 1 | MCLR/VPP — Master Clear (reset) / programming voltage input |
| Chân 2 | RA0/AN0/CVREF — Digital I/O / analog input 0 / comparator reference |
| Chân 3 | RA1/AN1 — Digital I/O / analog input 1 |
| Chân 4 | RA2/AN2 — Digital I/O / analog input 2 |
| Chân 5 | RA3/AN3 — Digital I/O / analog input 3 |
| Chân 6 | RA4/T0CKI — Digital I/O / timer0 clock input |
| Chân 7 | RA5/AN4 — Digital I/O / analog input 4 |
| Chân 8 | VSS — Ground |
| Chân 9 | RA7/OSC1/CLKI — Oscillator input / digital I/O |
| Chân 10 | RA6/OSC2/CLKO — Oscillator output / digital I/O |
| Chân 11 | RC0/T1OSO/T13CKI — Digital I/O / timer1 clock |
| Chân 12 | RC1/T1OSI/CCP2 — Digital I/O / timer1 oscillator / CCP2 |
| Chân 13 | RC2/CCP1 — Digital I/O / CCP1 output |
| Chân 14 | RC3/SCL/SCK — Digital I/O / MSSP I2C SCL / SPI SCK |
| Chân 15 | RC4/SDA/SDI — Digital I/O / MSSP I2C SDA / SPI SDI |
| Chân 16 | RC5/SDO — Digital I/O / MSSP SPI SDO |
| Chân 17 | RC6/TX/CK — Digital I/O / USART TX / clock |
| Chân 18 | RC7/RX/DT — Digital I/O / USART RX / data |
| Chân 19 | VSS — Ground |
| Chân 20 | VDD — Positive supply |
| Chân 21 | RB0/INT0/AN12 — Digital I/O / external interrupt 0 / analog input 12 |
| Chân 22 | RB1/INT1/AN10 — Digital I/O / external interrupt 1 / analog input 10 |
| Chân 23 | RB2/INT2/AN8 — Digital I/O / external interrupt 2 / analog input 8 |
| Chân 24 | RB3/INT3/AN9 — Digital I/O / external interrupt 3 / analog input 9 |
| Chân 25 | RB4/AN11 — Digital I/O / analog input 11 |
| Chân 26 | RB5/AN13 — Digital I/O / analog input 13 |
| Chân 27 | RB6/PGC — Digital I/O / programming clock (ICSP) |
| Chân 28 | RB7/PGD — Digital I/O / programming data (ICSP) |
Ứng dụng tiêu biểu
PIC18LF25J11-I/SP phù hợp cho 6 Áp dụngs: Industrial Sensor Hub with Modbus-RTU, USB HID Peripheral (Mouse / Keyboard / Custom HID), Low-Power Data Logger with Sleep Cycling, Smart Card Reader Front-End, Consumer Appliance User Interface, Educational Development Board MCU.
Industrial Sensor Hub with Modbus-RTU
The PIC18LF25J11-I/SP fits industrial 4-20 mA sensor hubs because its 2.0V-3.6V supply rides directly on a 3.3V regulated rail, while the nanoWatt sleep currents let battery-backed panels idle for months. The integrated 10-bit ADC provides roughly 3.2 mV LSB at 3.3V, sufficient for thermocouple and 4-20 mA front ends with auto-zero calibration. Code space at 32 KB comfortably fits a Modbus-RTU slave plus interrupt-driven sampling, while the 4 KB SRAM buffers packet frames without DMA. Use the 28-pin SPDIP footprint when designing rugged enclosures requiring through-hole rework capability.
Được đề xuất
USB HID Peripheral (Mouse / Keyboard / Custom HID)
Although the LF part lacks an integrated USB peripheral, its 8-bit PIC18 core and 12 MIPS throughput handle USB Human Interface Device stacks in firmware via bit-banged or external transceiver designs. The 32 KB Flash fits a basic HID descriptor and interrupt endpoint handler, and the two USARTs plus two MSSP modules give plenty of GPIO multiplexing for custom HID interfaces. Designs stay robust because the SPDIP-28 package tolerates manual rework and field replacement, important for low-volume commercial peripherals.
Được đề xuất
Low-Power Data Logger with Sleep Cycling
The PIC18LF25J11-I/SP excels in battery-powered data loggers thanks to nanoWatt sleep currents measured in microamps, while its 32 KB Flash supports FAT16 or simple ring-buffer logging schemes. Wake sources include RTCC, watchdog and external interrupts on up to 34 I/O pins, letting the part sleep most of the time and burst-sample sensors on a schedule. The 28-pin SPDIP package is friendly to hand-soldered prototype boards, and the 2.0V minimum supply lets the system run directly from a single LiFe cell.
Được đề xuất
Smart Card Reader Front-End
The PIC18LF25J11-I/SP is well suited as a smart-card reader controller: 32 KB Flash fits T=0/T=1 protocol stacks, 4 KB SRAM buffers APDUs, and the two USARTs support both card-side and host-side channels. The 2.0V-3.6V supply matches ISO 7816 VCC requirements directly, eliminating a level shifter. The 28-pin SPDIP through-hole package simplifies iterative prototyping of secure-access hardware.
Được đề xuất
Consumer Appliance User Interface
Kitchen appliances and consumer devices often pair a low-cost 8-bit MCU with character LCDs, capacitive touch and PWM-controlled indicators - exactly the PIC18LF25J11-I/SP design envelope. The two CCP modules drive LED dimming or buzzer tones while MSSP modules drive I2C-controlled LCDs and SPI sensors. The 32 KB Flash fits UI state machines plus simple custom character sets, and the 28-pin SPDIP gives engineers a breadboard-friendly form for design verification before committing to surface-mount.
Được đề xuất
Educational Development Board MCU
The PIC18LF25J11-I/SP is a natural choice for educational dev boards: 28-pin SPDIP pins align with standard 0.1-inch headers, 32 KB Flash accepts hobbyist-scale C projects (XC8 compiler), and the 2.0V-3.6V supply matches USB-powered boards with a single LDO. Students get a real industrial-grade MCU footprint while keeping wiring simple.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18LF25J11-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 | PIC18F25J11-I/SP | PIC18LF24J11-I/SP | PIC18LF25J10-I/SP |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SPDIP-28 | SPDIP-28 - same | SPDIP-28 - same | SPDIP-28 - same |
| Program Memory (Flash) | 32 KB | 32 KB | 16 KB | 32 KB |
| SRAM | 4 KB | 4 KB | 1 KB | 4 KB |
| Supply Voltage | 2.0 V to 3.6 V | 2.0 V to 5.5 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| MIPS | 12 MIPS @ 40 MHz | 12 MIPS @ 40 MHz | 12 MIPS @ 40 MHz | 10 MIPS @ 40 MHz |
| I/O Pins | 34 | 34 | 34 | 34 |
| ADC Channels | 13 | 13 | 13 | 13 |
| Industrial Temp Grade | Yes (-40C to +85C) | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Low-voltage nanoWatt core for battery-powered designs (vsPIC18F25J11-I/SP)
- 32 KB Flash + 4 KB RAM balance at 12 MIPS (vsPIC18LF24J11-I/SP)
- Industrial -40C to +85C operating range (vsGeneral-purpose 0-70C variants)
Ghi chú thiết kế
Estimated: at 3.3V VDD and 12 MIPS active load, core current is in the single-digit milliamp range; in nanoWatt sleep the part drops to microamp currents. Decoupling the VDD pin with a 100 nF ceramic placed within 5 mm of the pin and a bulk 10 uF tantalum minimizes ripple on the LF rail. Avoid tying unused I/O to VDD through excessive pull-ups, since internal weak pull-ups are sufficient and reduce leakage.
Place the ICSP header on the same board edge as the SPDIP-28 device so the programming cable does not cross the oscillator traces. Keep the MCLR pin's RC network - typically 10 kOhm to VDD and 100 nF to ground - within 5 mm of the pin. Route the RA6/OSC2 and RA7/OSC1 traces over a continuous ground pour to suppress noise coupling into the ADC reference.
Do not exceed 3.6V on the LF variant - the part is NOT a 5V-tolerant drop-in for the PIC18F25J11. Configure all unused I/O as outputs (not inputs) to avoid floating-pin shoot-through currents. The 10-bit ADC's input source impedance should stay below 2.5 kOhm for full conversion accuracy at the chosen sample rate, otherwise add an op-amp buffer.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product page. The part is not AEC-Q100 qualified - it is an industrial-grade component, not automotive.
