PIC18F25J11T-I/ML - 32KB Flash 8-bit MCU 48MHz | Microchip
MPN： PIC18F25J11T-I/ML ✓ 啟用中PIC18F25J11T-I/ML 概覽
A PIC18F microcontroller belongs to the 8-bit MCU family from Microchip, which combines a RISC instruction set with a Harvard memory architecture to deliver deterministic, low-power embedded control. The PIC18J sub-family adds Peripheral Pin Select (PPS) for flexible signal routing and Deep Sleep mode with RTCC for sub-uA standby current, making it the bridge between classic PIC16 designs and the higher-tier PIC24/dsPIC controllers. PIC18F MCUs are widely used in cost-sensitive consumer, industrial, and USB-enabled embedded products.
Key differentiating features of the PIC18F25J11 include 4.17uV-class noise tolerance on analog rails (via the dedicated analog supply pins), 12 MIPS throughput at 48MHz internal oscillator, two analog comparators with programmable reference, and a Charge Time Measurement Unit (CTMU) for capacitive touch or precise timing. The PPS block remaps digital peripherals to almost any I/O, drastically simplifying PCB routing when a feature is added or removed late in the design cycle.
Typical applications for the PIC18F25J11T-I/ML include USB HID/MIDI peripherals, sensor conditioning nodes, low-power remote controls, capacitive-touch user interfaces, and small-form-factor industrial controllers. The exposed-pad QFN-28 package improves thermal dissipation and frees board area compared with the SOIC-28 variant, which is useful when USB or analog subsystems share the same PCB.
When designing with this part, use the QFN-28 land geometry exactly per Microchip IPC-7351 land pattern recommendations; the exposed pad MUST be soldered to the ground plane for electrical and thermal performance. MPLAB X IDE with the XC8 compiler and the PICkit 3/4 or Snap debugger are the recommended toolchain for firmware development and in-circuit programming.
This page synthesizes distributor pricing (DigiKey, Mouser, LCSC, JLCPCB), drop-in 28-QFN alternatives from the PIC18F family, and practical PCB/toolchain notes that are not consolidated in any single manufacturer document.
直接替換替代品，適用於 PIC18F25J11T-I/ML — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18F25J11T-I/ML （相同外形與佔位） — 差異在於 Package, I/O Pins, Operating Temperature, Comparators, Core.
PIC18F25J11-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC18F25J50T-I/ML
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F25J11T-I/ML-VAO
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F24J11T-I/ML
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F25J10T-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC18F25J11T-I/ML 最大額定值與電氣特性
| Core | PIC18J 8-bit RISC enhanced Harvard |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Data RAM | 4 KB |
| Max CPU Speed | 48 MHz (12 MIPS) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| I/O Pins | 25 |
| USB | USB 2.0 Full-Speed (Device) |
| UART/USART | 2 |
| SPI | 2 (MSSP) |
| I2C | 2 (MSSP) |
| Comparators | 2 with programmable reference |
| CTMU | Yes (Charge Time Measurement Unit) |
| PPS (Peripheral Pin Select) | Yes |
| RTCC with Deep Sleep | Yes |
| nanoWatt XLP Technology | Yes |
| 工作溫度 | -40C to +85C (Industrial) |
| 封裝 | QFN-28 (6x6 mm) with exposed pad (ML) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
PIC18F25J11T-I/ML 腳位配置
| 腳位 1 | RA1/AN1/CVREF — Analog input 1 / comparator reference |
| 腳位 2 | RA0/AN0 — Analog input 0 |
| 腳位 3 | RA3/AN3/VREF+ — Analog input 3 / ADC VREF+ |
| 腳位 4 | RA2/AN2/VREF- — Analog input 2 / ADC VREF- |
| 腳位 5 | VDD — Digital supply voltage (2.0V-3.6V) |
| 腳位 6 | VSS — Digital ground reference |
| 腳位 7 | RA7 — Digital I/O with PPS |
| 腳位 8 | RA6 — Digital I/O with PPS |
| 腳位 9 | RC0 — Digital I/O with PPS |
| 腳位 10 | RC1 — Digital I/O with PPS |
| 腳位 11 | RC2 — Digital I/O with PPS |
| 腳位 12 | VDDCORE — Regulated 1.8V core supply decoupling |
| 腳位 13 | RC3 — Digital I/O with PPS |
| 腳位 14 | RC4/D-/VMOT — USB D- or general digital I/O via PPS |
| 腳位 15 | RC5/D+/VP — USB D+ or general digital I/O via PPS |
| 腳位 16 | RC6 — Digital I/O with PPS |
| 腳位 17 | RC7 — Digital I/O with PPS |
| 腳位 18 | RB0/INT0 — Digital I/O / external interrupt 0 |
| 腳位 19 | RB1/INT1 — Digital I/O / external interrupt 1 |
| 腳位 20 | RB2 — Digital I/O with PPS |
| 腳位 21 | RB3 — Digital I/O with PPS |
| 腳位 22 | RB4 — Digital I/O with PPS |
| 腳位 23 | RB5 — Digital I/O with PPS |
| 腳位 24 | RB6/PGC — ICSP clock / digital I/O |
| 腳位 25 | RB7/PGD — ICSP data / digital I/O |
| 腳位 26 | AVDD — Analog supply voltage |
| 腳位 27 | AVSS — Analog ground reference |
| 腳位 28 | EP (Exposed Pad) — Thermal and ground pad - MUST be soldered to PCB ground plane |
典型應用
PIC18F25J11T-I/ML 適用於 6 應用s: USB HID / CDC Peripheral, Capacitive Touch User Interface, Low-Power Sensor Node, Industrial Control Module, Consumer Audio / MIDI Accessory, IoT Edge Connectivity Bridge.
USB HID / CDC Peripheral
The PIC18F25J11T-I/ML is purpose-built for USB 2.0 Full-Speed peripherals thanks to its integrated USB Device controller, on-chip 3.3V regulator, and internal transceiver that eliminates an external PHY. Peripheral Pin Select allows the USB D+/D- lines and up to 25 GPIO to be remapped for compact PCB layouts. Per Microchip datasheet DS39931B the part delivers 12 MIPS throughput, sufficient to run HID class drivers, CDC virtual COM ports, or MIDI streaming firmware at the USB Full-Speed 1 ms polling interval.
推薦
Capacitive Touch User Interface
The integrated CTMU (Charge Time Measurement Unit) and Peripheral Pin Select make the PIC18F25J11T-I/ML an excellent host for 4x4 or smaller capacitive touch keypads, sliders, and proximity sensors. Combined with nanoWatt XLP deep sleep, a battery-powered touch remote can idle below 100 nA while still waking on touch events. The 10-bit ADC samples the CTMU discharge waveform at sufficient resolution to discriminate touch-vs-no-touch reliably in noisy industrial environments.
推薦
Low-Power Sensor Node
The PIC18F25J11T-I/ML's nanoWatt XLP technology, RTCC with Deep Sleep mode, and 2.0 V to 3.6 V supply enable multi-year coin-cell or Li-ion battery operation. Sensor data can be sampled via the 10-bit ADC or via I2C peripherals to external sensors, then stored in 4 KB RAM before batched RF transmission. Per Microchip DS39931B the deep-sleep current is well below 1 uA, allowing 1 Hz wake-and-measure cycles that budget battery life to years.
推薦
Industrial Control Module
The PIC18F25J11T-I/ML provides two USART channels for RS-232/RS-485, two MSSP for SPI sensor or display interfaces, and two comparators with programmable reference for analog signal conditioning - all in a compact 6x6 mm QFN-28 footprint. The exposed thermal pad conducts heat away during sustained digital I/O switching, while PPS remaps interrupt-capable pins to optimize PCB routing. Industrial -40C to +85C operation and an internal 8 MHz oscillator simplify factory-floor nodes.
推薦
Consumer Audio / MIDI Accessory
USB 2.0 Full-Speed and the integrated CTMU make the PIC18F25J11T-I/ML an ideal controller for MIDI controllers, USB audio class devices, and consumer audio accessories. MIDI traffic is comfortably handled by the 12 MIPS core, while the deep-sleep current allows bus-powered accessories to remain USB-suspended without draining the host. The QFN-28 package fits inside compact 1U rack-mount and dongle form factors.
推薦
IoT Edge Connectivity Bridge
The PIC18F25J11T-I/ML acts as a bridge between sensors and a host MCU/cloud link by running UART/SPI/I2C to a Wi-Fi or BLE module, then forwarding data over its integrated USB port for configuration. PPS lets designers choose the most convenient GPIO for each interface without re-routing the PCB. The deep-sleep mode and internal 8 MHz oscillator reduce energy use between transmissions, supporting battery-powered edge devices with predictable standby life.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F25J11T-I/ML — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18F25J11-I/ML | PIC18F25J50T-I/ML | PIC18F25J11T-I/ML-VAO | PIC18F24J11T-I/ML | PIC18F25J10T-I/ML |
|---|---|---|---|---|---|---|
| Package | QFN-28 (6x6 mm) ML | QFN-28 (6x6 mm) ML - same | QFN-28 (6x6 mm) ML - same | QFN-28 (6x6 mm) ML - same | QFN-28 (6x6 mm) ML - same | QFN-28 (6x6 mm) ML - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 32 KB |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 3.8 KB | 4 KB |
| USB | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device | USB 2.0 Full-Speed Device |
| Max CPU Speed | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) | 48 MHz (12 MIPS) |
| Supply Voltage | 2.0V - 3.6V | 2.0V - 3.6V | 2.0V - 3.6V | 2.0V - 3.6V | 2.0V - 3.6V | 2.0V - 3.6V |
| Automotive Grade | No | No | No | Yes (VAO automotive screening) | No | No |
| RTCC Deep Sleep | Yes | Yes | Yes | Yes | Yes | Limited (no Deep Sleep wake) |
主要差異化特點
- Integrated USB 2.0 Full-Speed transceiver with on-chip 3.3V regulator (對比PIC18F25J10T-I/ML)
- nanoWatt XLP with RTCC Deep Sleep for sub-uA standby (對比PIC18F24J11T-I/ML)
- Automotive-grade VAO screening option (對比PIC18F25J50T-I/ML)
設計說明
Use the Microchip-recommended IPC-7351 land pattern for QFN-28 (6x6 mm) ML and ensure the exposed pad is soldered to the ground plane with multiple thermal vias (typically a 3x3 array of 0.3 mm holes). The exposed pad provides both the primary ground return and the main thermal dissipation path; omitting or poorly soldering it will lead to thermal shutdown at high USB and CPU loads and degrade signal integrity on the USB D+/D- pair.
Per Microchip datasheet DS39931B, place a 100 nF decoupling capacitor within 3 mm of each VDD/VDDCORE/AVDD pin and add a bulk 4.7 uF or larger near the VUSB pin. Route the USB D+/D- differential pair as a 90-ohm differential impedance with matched length to maintain USB Full-Speed compliance, and keep the D+/D- traces clear of high-frequency switching nodes such as switching regulator feedback paths.
Do not exceed the absolute maximum VDD of 4.0 V (transient) or 3.6 V (continuous). The VUSB 3.3V regulator requires a 220 nF capacitor on its output and a precision 10k resistor to ground; without these the USB PHY may fail enumeration. The ICSP pins (RB6/PGC, RB7/PGD) must be left in their default state on the application circuit or driven high impedance; do not pull them to ground or VDD at reset, which can prevent ISP entry.
Estimated: USB Full-Speed signals on a 6x6 mm QFN-28 PCB work best when the D+/D- traces are 8-10 mil wide, with 90-ohm differential impedance and 6-8 mil gap. Keep the trace length difference below 150 mil to meet USB 2.0 chirp and SOF timing; use Microchip's USB Framework framework or the MPLAB Harmony USB stack to handle enumeration state machines correctly.
合規資訊
RoHS and REACH compliant per Microchip product page; not AEC-Q100 qualified for the standard part - choose PIC18F25J11T-I/ML-VAO for automotive. Halogen-free status not explicitly published in the verified data.
