PIC18LF25J50T-I/SO - 48MHz USB 8-bit MCU 32KB Flash | Microchip
N.º de pieza: PIC18LF25J50T-I/SO ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.83 | $4,83 |
| 10 | $4.34 | $43,40 |
| 100 | $3.86 | $386,00 |
| 500 | $3.45 | $1.725,00 |
| 1.000 | $3.05 | $3.050,00 |
PIC18LF25J50T-I/SO Descripción general
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripherals into one device. PIC18 microcontrollers use Microchip's enhanced 8-bit RISC architecture with a 16-bit instruction word, sitting between legacy PIC16 parts and higher-performance 16-bit dsPIC/PIC24 families. The "J" suffix denotes parts designed for nanoWatt XLP (eXtreme Low-Power) operation, with sleep currents in the nanoampere range, suitable for battery-powered designs with USB connectivity.
Key features of the PIC18LF25J50 family include a 48 MHz internal oscillator (12 MIPS instruction throughput), full-speed USB 2.0 device with on-chip transceiver, 10-bit ADC with up to 13 channels, multiple PWM and capture/compare modules, I2C/SPI/EUSART peripherals, and nanoWatt XLP power management. The integrated USB peripheral eliminates the need for an external transceiver, reducing BOM cost and PCB area in USB device designs.
The device is built on an enhanced Harvard architecture with separate program and data buses, supporting C-compiler-friendly operation. Its wide operating voltage range of 2.0 V to 3.6 V allows direct connection to battery chemistries such as 2x AA alkaline or single-cell Li-ion regulated to 3.3 V. The SOIC-28 package provides robust mechanical connections suitable for hand-prototyping and industrial-temperature environments.
Typical applications include USB HID peripherals such as keyboards/mice/custom input devices, USB-to-UART bridges, USB data loggers, battery-powered sensor nodes with USB charging, and embedded learning platforms. Industrial sensing and metering designs that require USB connectivity without external transceivers also benefit from the part.
When designing with this MCU, allocate proper PCB space for the USB D+/D- traces (90-ohm differential, length-matched) and place the internal voltage regulator bypass capacitor close to the VUSB3V3 pin. The ICSP programming pins must remain accessible for in-system programming and debugging using tools such as MPLAB PICkit or ICD.
This page synthesizes distributor pricing, drop-in same-brand alternatives, and practical design notes not always called out in the manufacturer datasheet, helping engineers select and source the right PIC18LF variant for low-power USB designs.
Alternativas directas para PIC18LF25J50T-I/SO — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con PIC18LF25J50T-I/SO (mismo factor de forma y huella) — difiere en Package, Core Architecture, USB Interface, Operating Temperature, ADC.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
PIC18LF25J50-I/SO
✅ Sustitución directa✓ En stock
$2.75 / unidad
Ver hoja de datos →PIC18F25J50T-I/SO
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
PIC18F25J50-I/SO
✅ Sustitución directa✓ En stock
$2.78 / unidad
Ver hoja de datos →PIC18LF2553T-I/SO
✅ Sustitución directa✓ En stock
$2.35 / unidad
Ver hoja de datos →PIC18LF2550T-I/SO
✅ Sustitución directa✓ En stock
$5.1 / unidad
Ver hoja de datos →PIC18LF25J50T-I/SO Valores máximos y características eléctricas
| Product Family | PIC18F / PIC18LF (PIC18 J-series) |
| Core Architecture | 8-bit PIC enhanced Harvard |
| Family Sub-series | PIC18LF25J50 / nanoWatt XLP |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| RAM | 4 KB |
| Operating Frequency | 48 MHz (12 MIPS) |
| Supply Voltage (Vdd) | 2.0 V to 3.6 V |
| USB Interface | USB 2.0 Full-Speed Device, integrated transceiver |
| A/D Converter | 10-bit, up to 13 channels |
| Encapsulado | 28-pin SOIC (0.295", 7.50 mm width) |
| Tipo de montaje | Surface Mount |
| Temperatura de funcionamiento | -40C to +85C (Industrial) |
| Peripherals | I2C, SPI, EUSART (UART), PWM, ECCP, Comparators |
| Nivel MSL | 1 (per JEDEC J-STD-020) |
| Estado RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes |
| Program Memory Type | Flash (self-programmable) |
| Instruction Set | Enhanced PIC18 / 75 instructions |
Configuración de pines de PIC18LF25J50T-I/SO
| Pin 1 | MCLR/VPP/RE3 — Master Clear / Programming voltage / digital input RE3 |
| Pin 2 | RA0/AN0/CVREF+/ULPMU — PORTA bit 0, analog input 0, comparator VREF+, ULPMU |
| Pin 3 | RA1/AN1/C1INC-/ULPMU — PORTA bit 1, analog input 1, comparator 1 inverting input |
| Pin 4 | RA2/AN2/VREF-/CVREF- — PORTA bit 2, analog input 2, A/D reference-, comparator VREF- |
| Pin 5 | RA3/AN3/VREF+/C1OUT — PORTA bit 3, analog input 3, A/D reference+, comparator 1 output |
| Pin 6 | RA4/T0CKI/C1OUT — PORTA bit 4, Timer0 clock input, open-drain |
| Pin 7 | RA5/AN4/SS1/HLVDIN — PORTA bit 5, analog input 4, SPI1 slave select, HLVD input |
| Pin 8 | Vss — Ground reference |
| Pin 9 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock in / PORTA bit 7 |
| Pin 10 | OSC2/CLKO/RA6 — Crystal oscillator output / clock out / PORTA bit 6 |
| Pin 11 | RC0/T1OSO/T1CKI — PORTC bit 0, Timer1 oscillator output, Timer1 clock input |
| Pin 12 | RC1/SOSC2/T1OSI/CCP2 — PORTC bit 1, SOSC2, Timer1 oscillator input, CCP2 I/O |
| Pin 13 | RC2/CCP1/P1A — PORTC bit 2, ECCP1 I/O, PWM output |
| Pin 14 | VUSB3V3 — USB internal 3.3 V regulator output / external bypass to Vdd |
| Pin 15 | RC4/D-/VM — PORTC bit 4, USB D-, USB VBUS minus monitor |
| Pin 16 | RC5/D+/VP — PORTC bit 5, USB D+, VBUS plus monitor |
| Pin 17 | RC6/TX1/CK1 — PORTC bit 6, EUSART1 async transmit, sync clock |
| Pin 18 | RC7/RX1/DT1/SDO1 — PORTC bit 7, EUSART1 RX, sync data, SPI1 SDO |
| Pin 19 | Vss — Ground reference |
| Pin 20 | VDD — Positive supply voltage 2.0 V to 3.6 V |
| Pin 21 | RB0/AN12/INT0/FLT0 — PORTB bit 0, analog input 12, external interrupt 0, ECCP fault input |
| Pin 22 | RB1/AN10/INT1 — PORTB bit 1, analog input 10, external interrupt 1 |
| Pin 23 | RB2/AN8/INT2/CTS1 — PORTB bit 2, analog input 8, external interrupt 2, UART CTS |
| Pin 24 | RB3/AN9/CCP2/RTS1 — PORTB bit 3, analog input 9, CCP2, UART RTS |
| Pin 25 | RB4/AN11/KBI0/SDI1/SDA1 — PORTB bit 4, analog input 11, KBI0, SPI1 SDI, I2C1 SDA |
| Pin 26 | RB5/KBI1/PGM/C2OUT — PORTB bit 5, KBI1, programming pin, comparator 2 output |
| Pin 27 | RB6/KBI2/PGC/ICSPCLK — PORTB bit 6, KBI2, ICSP clock |
| Pin 28 | RB7/KBI3/PGD/ICSPDAT — PORTB bit 7, KBI3, ICSP data |
Aplicaciones típicas
PIC18LF25J50T-I/SO es adecuado para 6 aplicacións: USB HID Peripheral (Keyboard/Mouse/Custom HID), USB-to-UART / CDC Virtual COM Port Bridge, Battery-Powered USB Data Logger, USB Charging / Battery Monitor Front-End, Educational / Maker Embedded Platform, Industrial USB Sensor Interface.
USB HID Peripheral (Keyboard/Mouse/Custom HID)
The PIC18LF25J50T-I/SO is designed for USB Human Interface Device (HID) class peripherals including keyboards, mice, game controllers, and custom I/O panels. The integrated USB 2.0 Full-Speed device interface with on-chip transceiver eliminates external PHY circuitry, saving PCB area and BOM cost in space-constrained HID designs. The 32 KB Flash accommodates HID report descriptors plus application logic, while 4 KB RAM provides headroom for HID report buffers, ring structures, and host communication state. The wide 2.0 V to 3.6 V supply range simplifies battery-powered HID peripherals such as wireless presenters and BLE-to-USB bridges. Engineering tip: enumerate as a composite HID + vendor-class device to share one physical USB connection between input functions and a custom control channel without requiring a custom host driver.
Recomendado
USB-to-UART / CDC Virtual COM Port Bridge
The PIC18LF25J50T-I/SO is well matched to USB CDC class implementations for a Virtual COM Port (VCP) bridge, allowing legacy RS-232 devices to gain USB connectivity. Microchip provides a free CDC stack in the MLA (Microchip Libraries for Applications), which runs on the PIC18LF25J50 with the integrated USB peripheral handling enumeration and bulk transfers. The 12 MIPS performance at 48 MHz is sufficient to handle USB polling, UART framing, and protocol handling such as Modbus-to-USB conversion. The nanoWatt XLP sleep modes let the bridge enter suspend (USB suspend state) at under 50 uA when the host stops transmitting, critical for USB-certified low-power operation. Engineering tip: enable USB bus-powered sensing via the VBUS pin to allow MCU firmware to detect host connection state and properly handle the USB suspend/resume state machine.
Recomendado
Battery-Powered USB Data Logger
The PIC18LF25J50T-I/SO's nanoWalt XLP low-power architecture makes it a strong fit for portable battery-powered data loggers that upload over USB. Sleep currents in the deep-sleep modes are designed to be under 100 nA, allowing months of standby battery life when the logger is not actively sampling or connected. The 32 KB Flash comfortably holds sample buffering code plus USB mass-storage or vendor-class driver stacks; the 10-bit A/D converter with up to 13 channels provides enough analog input for typical temperature, pressure, and voltage monitoring. Engineering tip: disable the on-chip voltage regulator (ENVREG pin handling) when running from a regulated 3.3 V source to recover the quiescent current used by the regulator and extend battery life further.
Recomendado
USB Charging / Battery Monitor Front-End
The PIC18LF25J50T-I/SO serves as the USB interface and supervisor for small single-cell Li-ion battery packs where the MCU reads a fuel-gauge chip, monitors cell voltage via its 10-bit A/D, and reports status over USB to a host PC. The integrated USB transceiver handles enumeration, while the EUSART and I2C peripherals communicate with the fuel gauge and charger ICs, exposing charger status, current, and temperature via a vendor-class USB device. The wide 2.0-3.6 V Vdd range lets the MCU operate directly from the Li-ion cell voltage without external level translation. Engineering tip: place a 100 kHz I2C bus pull-up on the SDA/SCL pins close to the MCU and keep the D+/D- USB traces length-matched within 2 mm and on a 90-ohm differential impedance for USB compliance.
Recomendado
Educational / Maker Embedded Platform
The PIC18LF25J50T-I/SO is widely adopted in educational and maker-oriented development boards thanks to its integrated USB peripheral and abundant on-chip resources including the 10-bit A/D, PWM, capture/compare, and three communication peripherals (EUSART, SPI, I2C). The SOIC-28 package is hand-solderable for breadboard and prototype use, while still being robust enough for final student projects. The Microchip ecosystem provides free MPLAB X IDE, XC8 compiler, and MLA USB stack so students can build complete USB devices on day one. Engineering tip: include an ICSP header even on through-hole prototypes - this allows in-system reprogramming without removing the MCU and provides access to debug breakpoints via PICkit or ICD tools.
Recomendado
Industrial USB Sensor Interface
The PIC18LF25J50T-I/SO is suitable for industrial USB sensor interfaces where the MCU aggregates readings from 4-20 mA or 0-10 V analog sensors, scales them, and exposes the values to a host PC via USB. The 10-bit A/D and up to 13 analog inputs accommodate multiple industrial sensor channels per unit, while the 2.0 V minimum Vdd allows operation from non-isolated 24 V industrial rails via a buck regulator. The industrial -40C to +85C temperature grade is sufficient for indoor factory environments. Engineering tip: protect the MCU's analog inputs with TVS diodes for surge protection on the long sensor cable runs typical of industrial installations, and reference the design using external op-amp buffers where low-impedance signal sources are needed to prevent A/D input leakage.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para PIC18LF25J50T-I/SO — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | PIC18LF25J50-I/SO | PIC18F25J50T-I/SO | PIC18F25J50-I/SO | PIC18LF2553T-I/SO | PIC18LF2550T-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-28 (0.295" body) | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| RAM | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB (-50%) | 2 KB (-50%) |
| Vdd Range | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 5.5 V (wider) | 2.0 V to 5.5 V (wider) | 2.0 V to 3.6 V | 2.0 V to 3.6 V |
| Max CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| USB Interface | USB 2.0 Full-Speed Device, integrated transceiver | USB 2.0 FS, integrated transceiver - same | USB 2.0 FS, integrated transceiver - same | USB 2.0 FS, integrated transceiver - same | USB 2.0 FS, integrated transceiver - same | USB 2.0 FS, integrated transceiver - same |
| A/D Converter | 10-bit, up to 13 channels | 10-bit, up to 13 channels - same | 10-bit, up to 13 channels - same | 10-bit, up to 13 channels - same | 10-bit, up to 12 channels (one fewer) | 10-bit, up to 10 channels (three fewer) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same |
Diferenciadores clave
- Wide 2.0 V to 3.6 V supply range versus most PIC18 J series (frente a PIC18F25J50T-I/SO)
- 4 KB RAM is twice the memory of older 25J5x siblings (frente a PIC18LF2550T-I/SO)
- Tape-and-reel packaging for automated assembly (frente a PIC18LF25J50-I/SO)
- Industrial -40C to +85C temperature grade standard (frente a PIC18F25J50T-I/SO)
Notas de diseño
Place the VUSB3V3 pin bypass capacitor (4.7 uF minimum, ceramic X7R 0603) within 5 mm of the pin. Route the USB D+/D- traces as a 90-ohm differential pair (matching within 0.15 mm width, length-matched within 2 mm), keep them on the same layer, and avoid routing them near clock lines or switching power supply traces. Ground reference the D+/D- differential pair over its full length. Recommended practice from the Microchip USB Design Guide: keep the D+/D- total length under 30 mm and use an ESD protection array (such as USBLC6-2SC6) on the connector side.
Estimated: at 48 MHz operation with USB active at 3.3 V, typical active current is ~25 mA, dropping to 30 uA in Sleep and under 100 nA in Deep Sleep (per the nanoWatt XLP chapter of the datasheet). For battery-powered designs, disable the internal USB 3.3 V regulator by tying ENVREG to Vss and supplying 3.3 V externally to maximize power savings and to allow operation below 3.3 V where the regulator is otherwise disabled. Add a 100 nF decoupling capacitor at every Vdd pin and a 1 uF bulk capacitor near the SOIC package. Use the VBUS sense function to detect USB host attach/detach and properly enter USB suspend when the host is powered down.
Do not skip the 4.7 uF VUSB3V3 bypass capacitor - the internal 3.3 V USB regulator requires it for stable operation and USB electrical compliance will fail otherwise. Ensure MCLR is pulled up to Vdd through a 10 kohm resistor (with optional 100 nF cap for noise immunity) for proper reset operation, and confirm that the ICSP header is wired per the Microchip ICSP specification or in-circuit programming will be unreliable. The internal 8 MHz HFINTOSC is factory calibrated but the PLL multiplier setting should be verified at first power-up; lockup occurs if the PLL configuration bits are programmed incorrectly.
Use a four-layer PCB stack-up with a continuous ground plane on layer 2 if possible, since the SOIC-28 package does not have a thermal pad - heat is dissipated only through the 28 small pins. For noisy USB designs where high current switching occurs, keep the analog ground (AVss) separate and stitch them together under a single ferrite bead or a zero-ohm resistor to prevent return-current noise injection into A/D conversions. Keep quartz crystal traces short (less than 5 mm from OSC1/OSC2) to avoid stray capacitance.
Información de cumplimiento
RoHS and lead-free compliant per Microchip product declarations. AEC-Q100 not applicable (non-automotive qualification); no AEC-Q100 qualified variant of the PIC18LF25J50T-I/SO listed at Microchip. Operating temperature range -40C to +85C (Industrial grade).
