PIC18LF25J50-I/SS - 8-bit 48MHz USB MCU 32KB Flash | Microchip
部品番号: PIC18LF25J50-I/SS ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.94 | $1,470.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC18LF25J50-I/SS 概要
A PIC18 microcontroller is a member of Microchip's 8-bit PIC (Peripheral Interface Controller) family, a RISC-based Harvard-architecture MCU line that occupies the microcontroller -> 8-bit MCU -> embedded controller taxonomy within integrated circuits. The PIC18F/LF J-series specifically targets USB-enabled and low-power embedded designs, bridging the gap between traditional PIC16 parts and the higher-pin-count PIC24/dsPIC families.
Key features include 32 KB of self-programmable Flash, 4 KB SRAM, a full-speed USB 2.0 SIE (Serial Interface Engine) with on-chip transceiver, a 10-bit ADC up to 13 channels, two analog comparators, four 16-bit timers, two UART, SPI, and I2C peripherals. The LF variant operates from 2.0 V to 3.6 V, while the F variant extends to 5.5 V. nanoWatt XLP technology provides sleep currents in the nanoamp range, making the part suitable for battery-powered USB peripherals.
Architecturally, the PIC18LF25J50 uses a modified Harvard structure with separate program Flash and data SRAM buses, a 16-bit instruction word optimized for C compilation, and a priority-based interrupt controller supporting both legacy and vectored interrupts. The integrated USB SIE handles protocol layer functions, allowing USB device operation using only external bus pull-up and decoupling components.
Typical applications include USB-to-UART bridges, USB human-interface devices (HID) such as keyboards/mouse dongles, USB sensor nodes, USB charging controllers, embedded data loggers with USB upload, and low-power portable instrumentation with USB connectivity. The combination of USB and nanoWatt XLP also makes it ideal for medical and industrial USB dongles.
When designing with this part, place the 28-SSOP decoupling capacitors close to VDD/AVDD pins, route the D+/D- USB signals as a 90-ohm differential pair with matched length, and verify the external 3.3 V regulator meets USB suspend current requirements (<2.5 mA for low-power device class). Always reference the PIC18F46J50 family datasheet (DS-39775) for complete peripheral and electrical specifications.
This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design notes not collected in the manufacturer datasheet, supporting faster component selection for embedded engineers.
ドロップイン代替品: PIC18LF25J50-I/SS — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC18LF25J50-I/SS （同一形状・フットプリント） — 相違点: ADC, MSL Level, Operating Temperature, Package, Program Memory (Flash).
クイック比較ツール — 並列比較する代替部品を選択:
PIC18F25J50-I/SS
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC18LF26J50-I/SS
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC18LF24J50-I/SS
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC18LF25J50-I/SO
✅ ドロップイン✓ 在庫あり
$2.75 / 個
データシートを見る →PIC18F45J50-I/SS
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC18LF24K50-I/SS
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PIC18F24K50-I/SS
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC18LF25J50-I/SS 最大定格＆電気的特性
| Core Architecture | PIC 8-bit RISC Harvard |
| Series | PIC18 LF J-series (PIC18LF2XJXX/4XJXX family) |
| CPU Frequency | 48 MHz max |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| RAM | 4 KB |
| Operating Voltage (VDD) | 2.0 V to 3.6 V |
| USB Interface | USB 2.0 Full-Speed device with on-chip transceiver |
| ADC | 10-bit, up to 13 channels |
| Timers | 4 x 16-bit |
| UART | 2 |
| SPI | 1 |
| I2C (MSSP) | 1 |
| Analog Comparators | 2 |
| I/O Pins | 22 |
| パッケージ | 28-pin SSOP (5.30 mm body width) |
| 実装タイプ | Surface Mount |
| 動作温度 | -40C to +85C (Industrial -I grade) |
| MSLレベル | 1 (unlimited) |
| Lead-Free / RoHS | Yes (Compliant) |
| Low-Power Feature | nanoWatt XLP (eXtreme Low Power) |
PIC18LF25J50-I/SS ピン構成
| ピン 1 | MCLR/RE3 — Master Clear (reset) input / digital I/O |
| ピン 2 | RA0 — PORTA digital I/O bit0 |
| ピン 3 | RA1 — PORTA digital I/O bit1 |
| ピン 4 | RA2 — PORTA digital I/O bit2 |
| ピン 5 | RA3 — PORTA digital I/O bit3 |
| ピン 6 | RA4 — PORTA digital I/O bit4 |
| ピン 7 | RA5 — PORTA digital I/O bit5 |
| ピン 8 | VSS — Ground reference |
| ピン 9 | RA7/OSC1 — PORTA digital I/O bit7 / oscillator input |
| ピン 10 | RA6/OSC2 — PORTA digital I/O bit6 / oscillator output |
| ピン 11 | VDD — Positive supply voltage |
| ピン 12 | VSS — Ground reference |
| ピン 13 | RB0/PGD — PORTB I/O bit0 / programming data |
| ピン 14 | RB1/PGC — PORTB I/O bit1 / programming clock |
| ピン 15 | RB2 — PORTB I/O bit2 |
| ピン 16 | RB3 — PORTB I/O bit3 |
| ピン 17 | RB4/D- — PORTB I/O bit4 / USB D- (data minus) |
| ピン 18 | RB5/D+ — PORTB I/O bit5 / USB D+ (data plus) |
| ピン 19 | RB6 — PORTB I/O bit6 |
| ピン 20 | RB7 — PORTB I/O bit7 |
| ピン 21 | RC0 — PORTC digital I/O bit0 |
| ピン 22 | RC1 — PORTC digital I/O bit1 |
| ピン 23 | RC2 — PORTC digital I/O bit2 |
| ピン 24 | RC3 — PORTC digital I/O bit3 |
| ピン 25 | RC4 — PORTC digital I/O bit4 |
| ピン 26 | RC5 — PORTC digital I/O bit5 |
| ピン 27 | RC6 — PORTC digital I/O bit6 / VUSB 3V3 output |
| ピン 28 | RC7 — PORTC digital I/O bit7 |
主な用途
PIC18LF25J50-I/SS の用途: 6 件s: USB-to-UART Bridge Converter, USB HID Peripheral Dongle, USB Battery Charger Controller, Industrial USB Sensor Data Logger, Portable USB Medical Instrument Dongle, USB-Connected Sensor Hub / IoT Edge Node.
USB-to-UART Bridge Converter
The PIC18LF25J50-I/SS is purpose-fit for USB-to-UART bridge converters such as CP2102 replacement designs, thanks to its integrated USB 2.0 Full-Speed SIE and dual UART peripherals. Its 48 MHz CPU clock sustains 12 Mbps USB throughput while leaving cycles for transparent serial protocol translation at rates up to 921600 baud. Placed in a 28-SSOP package with 22 user I/O, it implements the full bridge with no external PHY, minimizing BOM cost and PCB area versus designs using external USB transceivers. The nanoWatt XLP technology enables USB suspend compliance (<2.5 mA) for the bus-powered device class, while 32 KB Flash holds CDC-IACM firmware plus bootloader for in-field firmware updates.
おすすめ
USB HID Peripheral Dongle
The PIC18LF25J50-I/SS fits USB HID peripherals (keyboards, mouse dongles, gamepads, custom HID devices) through its integrated USB SIE and 32 KB Flash that holds full HID class drivers plus custom HID descriptors. The 48 MHz CPU processes HID reports with sub-millisecond latency, while four 16-bit timers support debouncing and LED/PWM breathing effects. With nanoWatt XLP, battery-powered HID dongles achieve multi-year coin-cell life by entering Sleep between HID reports. The 28-SSOP package supports compact dongle form factors, and 22 I/O provide ample pins for matrix-scanned keypads or sensor inputs alongside the USB interface.
おすすめ
USB Battery Charger Controller
The PIC18LF25J50-I/SS is well-matched to USB Battery Charging Specification (BC1.2) and proprietary charging protocols. Its 10-bit ADC monitors battery voltage and current, while PWM + timers drive switch-mode charger control loops. 32 KB Flash supports BC1.2 detection state machines plus optional SMBus/MCP SMBus host emulation for smart batteries. The 2.0 V minimum VDD allows direct operation from a single Li-ion cell when VBUS is absent, and nanoWatt XLP reduces standby drain to <1 uA - critical for long-shelf-life USB chargers. The 28-SSOP fits compact wall-wart and power-bank enclosures with thermal headroom up to 1 W dissipation.
おすすめ
Industrial USB Sensor Data Logger
The PIC18LF25J50-I/SS is fit for industrial USB sensor data loggers in factory automation and predictive maintenance. Its integrated USB enables direct PC connectivity without external bridges, while 4 KB RAM buffers sensor samples between USB transfers and 32 KB Flash stores a lightweight file system. The 10-bit ADC with up to 13 channels scans multiple analog sensors (temperature, pressure, vibration) at sample rates up to 100 kHz when CPU clock is shared. nanoWatt XLP provides Sleep currents below 1 uA for battery-backed loggers between sample bursts, and the -40C to +85C industrial temperature range covers most factory environments.
おすすめ
Portable USB Medical Instrument Dongle
The PIC18LF25J50-I/SS fits portable medical USB dongles (e.g. personal ECG, glucose meter interfaces, hearing-aid programmers) thanks to its low-voltage LF operation and nanoWatt XLP. The 10-bit ADC captures analog medical signals while the USB SIE streams data to a host PC running diagnostic software. 32 KB Flash fits USB CDC plus custom protocol firmware, with 4 KB RAM buffering sample streams. Operating from a single Li-ion cell down to 2.0 V VDD enables direct battery operation, while Sleep mode draws <1 uA for shelf-stable medical peripherals awaiting patient use. The 28-SSOP supports miniaturized dongle PCB layouts.
おすすめ
USB-Connected Sensor Hub / IoT Edge Node
The PIC18LF25J50-I/SS is fit for IoT edge nodes that require USB backhaul rather than wireless (e.g. wired USB sensor hubs, building automation modules). Its integrated USB enables plug-and-play enumeration on the host, while SPI/I2C/UART connect to off-board sensors and actuators. 32 KB Flash holds application firmware plus USB stack and bootloader, and 4 KB RAM buffers data between USB frames and sensor transactions. nanoWatt XLP enables bus-powered or battery-mains hybrid operation, where the node Sleeps when USB host suspends. The 22 I/O provides ample GPIO for status LEDs, control relays, and sensor interfaces in a single 28-SSOP chip.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC18LF25J50-I/SS — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | PIC18F25J50-I/SS | PIC18LF26J50-I/SS | PIC18LF24J50-I/SS | PIC18F45J50-I/SS | PIC18LF24K50-I/SS |
|---|---|---|---|---|---|---|
| Package | SSOP-28 | SSOP-28 (same) | SSOP-28 (same) | SSOP-28 (same) | SSOP-28 (same) | SSOP-28 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash Memory | 32 KB | 32 KB (same) | 64 KB (+100%) | 16 KB (-50%) | 32 KB (same) | 16 KB (-50%) |
| RAM | 4 KB | 4 KB (same) | 4 KB (same) | 2 KB (-50%) | 4 KB (same) | 2 KB (-50%) |
| Operating Voltage Range | 2.0 V to 3.6 V (LF) | 2.0 V to 5.5 V (F) | 2.0 V to 3.6 V (LF) | 2.0 V to 3.6 V (LF) | 2.0 V to 5.5 V (F) | 2.0 V to 3.6 V (LF) |
| CPU Frequency | 48 MHz | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) |
| USB Interface | Full-Speed USB 2.0 device | Full-Speed USB 2.0 device | Full-Speed USB 2.0 device | Full-Speed USB 2.0 device | Full-Speed USB 2.0 device | Full-Speed USB 2.0 device |
| Generation / Family | J-series (PIC18F2XJXX/4XJXX) | J-series (same) | J-series (same) | J-series (same) | J-series (same) | K-series (next-gen) |
主な差別化要因
- Higher Flash density within the J-series SSOP-28 family （vs PIC18LF24J50-I/SS)
- Direct LF low-voltage 2.0-3.6V operation, no external LDO required （vs PIC18F25J50-I/SS)
- Integrated USB 2.0 transceiver + nanoWatt XLP for low-power USB （vs PIC18LF24K50-I/SS)
設計ノート
USB bus-powered designs must limit average current draw to USB suspend threshold (<2.5 mA for USB 2.0 device class) when host suspends the bus. Place a 10 uF bulk capacitor on VBUS and 0.1 uF decoupling on each VDD/VSS pin pair. The internal 3.3V VUSB regulator (pin 27 / RC6) requires a 220 nF capacitor; failure to add this cap prevents USB enumeration. Use the nanoWatt XLP Sleep mode with USB suspended to meet the <2.5 mA budget in battery-backed designs.
Route the USB D+ and D- signals (RB4/RB5, pins 17-18) as a 90-ohm differential pair with matched lengths to within 150 mil, and place a 15 kohm pull-down on each line. Keep D+/D- traces short and away from switching nodes or oscillators. The 28-SSOP body is 5.30 mm wide - leave at least 6 mm of PCB width for the land pattern plus trace escape routing. Connect all VSS pins to a single ground plane; do not split analog/digital ground under this device.
Do not exceed the 3.6 V absolute maximum VDD rating on the LF variant - applying 5V to VDD permanently damages the part. For 5V-only systems, use the PIC18F25J50-I/SS instead. The /SS suffix indicates SSOP-28 package; mixing /SS and /SO (SOIC-28) or /SP (SPDIP-28) parts on the same PCB will cause footprint mismatch. Verify the programming pins (PGC/PGD on RB1/RB0, pins 13-14) are accessible to the ICSP connector for in-system programming.
The 10-bit ADC accuracy is dependent on a clean AVDD supply. Place 100 nF + 10 uF decoupling on the analog supply rail and route AVSS directly to the ground plane star point. For ADC sampling rates above 100 kHz, add an RC anti-aliasing filter on each analog input. The MSSP peripheral's SPI can operate up to 10 MHz when FOSC = 48 MHz - ensure SPI slave devices tolerate that clock rate and the SPI trace length is short.
コンプライアンス情報
Lead-free and RoHS compliant per Microchip product page; AEC-Q100 not applicable for non-automotive microcontroller. MSL-1 (unlimited) moisture sensitivity per JEDEC J-STD-020.
