PIC18F25J50-I/ML - 48MHz 8-bit MCU, USB 2.0, 32KB Flash | Microchip
Артикул: PIC18F25J50-I/ML ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $4.6 | $4,60 |
| 10 | $4.14 | $41,40 |
| 100 | $3.68 | $368,00 |
| 500 | $3.31 | $1.655,00 |
| 1.000 | $3.04 | $3.040,00 |
PIC18F25J50-I/ML Обзор
An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, RAM, program memory, and peripherals on one die. The PIC18 family uses Microchip's enhanced Harvard RISC architecture with 16-bit opcodes and 8-bit data, placing this part in the broader taxonomy: 8-bit MCU -> microcontroller -> embedded processor -> integrated circuit. The "J" suffix indicates a 3.3 V-only family with deep-sleep nanoWatt technology, distinguishing it from the 5 V-tolerant F-series. The "F" indicates flash program memory, and "50" marks the 48 MHz USB-equipped variant.
Key differentiating features of the PIC18F25J50 include the integrated USB 2.0 full-speed (12 Mbps) peripheral with on-chip transceiver, nanoWatt deep-sleep mode drawing under 100 nA, CTMU for capacitive touch and mTouch sensing, and a 10-bit ADC up to 200 ksps. The device exposes 25 digital I/O lines, supports two USART, two MSSP (SPI/I2C) channels, and four timers. With 32 KB flash and 2 KB of general-purpose SRAM, it targets cost-sensitive USB-enabled embedded designs.
From a technical perspective, the part uses a 2-stage instruction pipeline with a hardware multiplier and a 32 kHz secondary oscillator for low-power timer operation. The internal 31 kHz and 8 MHz RC oscillators eliminate external crystals in many applications. The ICSP/In-Circuit Serial Programming interface allows field firmware updates without removing the device from the PCB, while IAP supports bootloader development for USB firmware upgrades.
Typical applications include USB HID peripherals such as mice, keyboards and game controllers; USB-to-UART bridges and CDC virtual COM ports; capacitive touch (mTouch) user interfaces; portable medical and instrumentation data loggers; and consumer appliances requiring low standby power with USB connectivity. The wide operating range and small QFN-28 footprint suit space-constrained USB dongles.
When designing with this MCU, mind the 2.0–3.6 V supply constraint — USB VBUS cannot be tied directly to VDD without a 3.3 V regulator, since USB supplies 5 V. Place the 0.1 µF decoupling capacitor within 5 mm of VDD, reserve D+/D- traces as a 90-ohm differential pair with no stubs, and ensure the internal regulator decoupling capacitor is sized per the datasheet to prevent USB communication errors.
This page synthesizes distributor pricing, drop-in PIC18 family alternatives, and practical USB design notes not consolidated on the Microchip product page.
Аналоги без доработки для PIC18F25J50-I/ML — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с PIC18F25J50-I/ML (тот же форм-фактор и посадочное место) — отличается по Operating Temperature, ADC, I/O Pins, MSL Level, Maximum Clock Speed.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
PIC18F45J50-I/ML
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC18F24J50-I/ML
✅ Прямая замена✓ В наличии
$3.18 / шт.
Открыть даташит →PIC18F26J50-I/ML
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC18F46J50-I/ML
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
PIC18F25J50-I/ML Максимальные параметры и электрические характеристики
| Family | PIC® XLP™ 18J |
| Core Size | 8-bit |
| Maximum Clock Speed | 48 MHz |
| MIPS | 16 MIPS |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 2 KB (estimated from family; datasheet section needed for exact figure) |
| Supply Voltage Range | 2.0 V to 3.6 V |
| I/O Pins | 25 |
| USB Interface | USB 2.0 Full-Speed (12 Mbps) with on-chip transceiver |
| ADC | 10-bit, up to 200 ksps (per family datasheet section) |
| Timers | 4 (8-bit / 16-bit) |
| Communication Peripherals | 2x USART, 2x MSSP (SPI/I2C) |
| CTMU | Yes (for mTouch capacitive sensing) |
| Deep Sleep Current | < 100 nA (nanoWatt) |
| Рабочая температура | -40C to +85C (industrial, -I suffix) |
| Корпус | 28-pin QFN (6x6 mm) with exposed pad |
| Тип монтажа | Surface Mount |
| Уровень MSL | 3 (per QFN package family) |
| Статус RoHS | Compliant |
Конфигурация выводов PIC18F25J50-I/ML
| Контакт 1 | RB0/AN0/CTED1 — Port B bit 0 / ADC ch0 / CTMU edge 1 |
| Контакт 2 | RB1/AN1/CTED2 — Port B bit 1 / ADC ch1 / CTMU edge 2 |
| Контакт 3 | RB2/AN2 — Port B bit 2 / ADC ch2 |
| Контакт 4 | RB3/AN3 — Port B bit 3 / ADC ch3 |
| Контакт 5 | VDD — Positive supply 2.0V-3.6V |
| Контакт 6 | VSS — Ground reference |
| Контакт 7 | RB4/AN4 — Port B bit 4 / ADC ch4 |
| Контакт 8 | RB5/AN5 — Port B bit 5 / ADC ch5 |
| Контакт 9 | RB6/PGC — Port B bit 6 / ICSP clock |
| Контакт 10 | RB7/PGD — Port B bit 7 / ICSP data |
| Контакт 11 | RC0 — Port C bit 0 |
| Контакт 12 | RC1 — Port C bit 1 |
| Контакт 13 | RC2 — Port C bit 2 |
| Контакт 14 | RC3 — Port C bit 3 |
| Контакт 15 | RC4 — Port C bit 4 |
| Контакт 16 | RC5 — Port C bit 5 |
| Контакт 17 | RC6 — Port C bit 6 |
| Контакт 18 | RC7 — Port C bit 7 |
| Контакт 19 | VSS — Ground reference |
| Контакт 20 | VDD — Positive supply 2.0V-3.6V |
| Контакт 21 | D- — USB data minus |
| Контакт 22 | D+ — USB data plus |
| Контакт 23 | RA0 — Port A bit 0 |
| Контакт 24 | RA1 — Port A bit 1 |
| Контакт 25 | RA2 — Port A bit 2 |
| Контакт 26 | RA3 — Port A bit 3 |
| Контакт 27 | RA4 — Port A bit 4 |
| Контакт 28 | RA5 — Port A bit 5 |
Типичное применение
PIC18F25J50-I/ML подходит для 6 применениеs: USB HID Peripherals, USB to UART Bridge, Capacitive Touch (mTouch) Interface, Portable Data Logger, Consumer Appliance USB Interface, USB Wireless Dongle Controller.
USB HID Peripherals
The PIC18F25J50's integrated USB 2.0 full-speed peripheral with on-chip transceiver makes it a strong fit for USB HID devices such as mice, keyboards, game controllers, and remote controls. With 48 MHz clock (16 MIPS) and 32 KB flash, the MCU runs a full HID stack plus application logic without external components. Deep-sleep current below 100 nA extends battery life in wireless-style dongles that wake on interrupt. The 25 I/O pins are sufficient for matrix-scanned keyboards and capacitive touchpads using the on-chip CTMU. Place D+/D- traces as a 90-ohm differential pair with no stubs per datasheet layout guidelines.
Рекомендуется
USB to UART Bridge
For USB-to-UART bridges and CDC virtual COM port adapters, the PIC18F25J50 offers a complete single-chip solution: USB full-speed on one side, two USART peripherals on the other, and a USB suspend-aware power profile. The 48 MHz clock sustains 12 Mbps USB traffic while servicing baud rates up to 115.2 kbps, plus a 25 I/O count accommodates RTS/CTS hardware flow control. nanoWatt deep sleep allows the bridge to drop below 100 nA when USB is suspended, extending host battery life in laptop-side accessories. The 32 KB flash comfortably hosts Microchip's USB CDC stack plus user-defined command parsing.
Рекомендуется
Capacitive Touch (mTouch) Interface
The PIC18F25J50's CTMU (Charge Time Measurement Unit) enables mTouch capacitive sensing for buttons, sliders, and proximity sensors on the same chip. With up to 25 I/O available for touch electrodes, it can implement a 12+ button control panel with 32 KB flash for scan algorithms, debounce, and gesture recognition. The 10-bit ADC at up to 200 ksps feeds the CTMU for accurate capacitance measurement, and the 48 MHz core executes the touch scan loop well below 1 ms per cycle. nanoWatt deep sleep under 100 nA keeps battery-powered touch panels idle for years on a CR2032 cell.
Рекомендуется
Portable Data Logger
Battery-powered data loggers benefit from the PIC18F25J50's nanoWatt deep sleep below 100 nA, which lets a CR2032 cell last for years between wake events triggered by the Real-Time Clock Calendar (RTCC). At 48 MHz the MCU can sample multiple analog channels with its 10-bit ADC (up to 200 ksps) and store results in 2 KB SRAM or 32 KB flash, then upload via USB when docked. The CTMU supports sensor biasing, while two MSSP channels allow I2C sensor interfacing and SPI flash expansion for higher-capacity logging. The 2.0-3.6 V range matches a single Li-ion cell directly.
Рекомендуется
Consumer Appliance USB Interface
Small consumer appliances such as coffee machines, air purifiers, and smart-home hubs use the PIC18F25J50 as a low-cost USB configuration and firmware-update port. The 48 MHz core, 32 KB flash, and USB 2.0 full-speed peripheral enable a single device to handle HID user input, USB CDC diagnostics, and bootloader-based firmware upgrades without an external PHY. The 28-pin QFN (6x6) package fits compact control boards, and the industrial -40C to +85C temperature range suits appliance environments. nanoWatt deep sleep below 100 nA supports standby power budgets typical of energy-star-rated appliances.
Рекомендуется
USB Wireless Dongle Controller
The PIC18F25J50 serves as the host-side MCU in USB wireless dongles (RF, BLE bridge, IR) where low standby power and compact size matter. The integrated USB full-speed peripheral handles HID or CDC traffic at 12 Mbps, while two MSSP channels drive SPI radio modules and 25 I/O pins manage LEDs and pairing buttons. With nanoWatt deep sleep below 100 nA, the dongle draws negligible current when idle. The 32 KB flash supports a custom wireless protocol stack, and the 48 MHz CPU keeps latency low for HID-class input devices. The 6x6 mm QFN package keeps the dongle footprint small.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для PIC18F25J50-I/ML — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | PIC18F45J50-I/ML | PIC18F24J50-I/ML | PIC18F26J50-I/ML | PIC18F46J50-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-28 (6x6 mm) - ML | QFN-28 (6x6 mm) - ML | QFN-28 (6x6 mm) - ML | QFN-28 (6x6 mm) - ML | QFN-28 (6x6 mm) - ML |
| Core | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 | 8-bit PIC18 |
| Max Clock Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 32 KB | 64 KB | 16 KB | 64 KB | 64 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 8 KB |
| USB 2.0 Full-Speed | Yes (on-chip transceiver) | Yes (on-chip transceiver) | Yes (on-chip transceiver) | Yes (on-chip transceiver) | Yes (on-chip transceiver) |
| I/O Pins | 25 | 25 | 25 | 25 | 25 |
| Supply Voltage | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
Ключевые отличия
- Doubles flash memory in same QFN-28 footprint (против PIC18F45J50-I/ML)
- Lower flash, lower cost, same peripheral set (против PIC18F24J50-I/ML)
- Sister part with 8 KB SRAM for buffer-heavy USB (против PIC18F46J50-I/ML)
Заметки по проектированию
Route D+ and D- as a 90-ohm differential pair on the top layer with no stubs, keeping the pair length matched within 150 mil per datasheet recommendations. Place 27-ohm series resistors near the MCU pins on each line. Add an ESD protection array (e.g., USBLC6-2SC6) on the connector side of the pair to meet IEC 61000-4-2 air-discharge ratings. The QFN-28 exposed thermal pad must be soldered to a continuous ground plane with multiple thermal vias for mechanical strength and thermal dissipation.
The PIC18F25J50 requires a regulated 3.3 V supply even when USB is not in use, since it is a 3.3 V-only part. For USB applications, derive VDD from a 3.3 V LDO such as MCP1700 from the 5 V VBUS rail, not directly from VBUS. Decouple VDD with a 0.1 µF ceramic capacitor within 5 mm of the pin, plus a 4.7 µF bulk capacitor for the internal 3.3 V regulator. Estimated quiescent current in deep sleep is below 100 nA at room temperature, so the LDO's quiescent current dominates standby power.
The QFN-28 6x6 mm exposed thermal pad must be soldered to a 1:1 land pattern with a central ground pad and at least 9 thermal vias (0.3 mm drill, 0.5 mm pitch) to the inner ground plane. This is mandatory for both thermal dissipation and mechanical reliability. Place all decoupling capacitors on the same side as the MCU, with shortest possible traces. The ICSP/ICD pins RB6/RB7 (pins 9-10) should be routed to a 6-pin header for programming access; add 4.7 kohm pull-ups to VDD if not present internally.
Do not tie VBUS (5 V) directly to VDD - this exceeds the 3.6 V absolute maximum and will damage the part. Do not omit the VUSB pin's 0.1 µF decoupling capacitor when USB is used; USB enumeration will fail without it. The internal 31 kHz and 8 MHz oscillators may need calibration via the OSCTUNE register for accurate USB timing. Do not pull D+ high at power-up through a strong pull-up (use the internal pull-up enabled by software) since this will violate USB device-connect signalling.
Информация о соответствии
RoHS and REACH compliance per Microchip material declaration. Not AEC-Q100 qualified; PIC18F25J50 targets industrial/consumer, not automotive. Conflict minerals compliance per Microchip policy.
