PIC18LF27J53T-I/SO - 128KB Flash USB 8-bit MCU 28-SOIC | Microchip
N.º da peça: PIC18LF27J53T-I/SO ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $5.2 | $5,20 |
| 10 | $4.78 | $47,80 |
| 100 | $4.31 | $431,00 |
| 500 | $3.95 | $1.975,00 |
| 1.000 | $3.62 | $3.620,00 |
PIC18LF27J53T-I/SO Visão geral
What is an 8-bit PIC microcontroller? An 8-bit microcontroller (MCU) is a single-chip computer that processes data 8 bits at a time, integrating a CPU, program memory (Flash), data memory (RAM), non-volatile EEPROM, and peripherals on one die. Within the Microchip taxonomy, this part belongs to the PIC18 family -> PIC18J sub-family -> PIC18LF27J53 USB series, all sharing the same Harvard RISC core architecture optimized for low power and deterministic interrupt response.
Key features include 128 KB self-programmable Flash with 64K x 16 organization, 3.8 KB RAM, an integrated full-speed USB 2.0 device/host/OTG transceiver, a 10-channel 12-bit ADC, multiple Enhanced USART, I2C and SPI interfaces, and four timers. The nanoWatt XLP technology provides deep-sleep currents under 100 nA, enabling battery-powered designs that still wake on USB attach events.
The device uses a modified Harvard architecture with a 16-bit instruction word and 8-bit data path, supported by a C-compiler-friendly instruction set. The integrated USB SIE handles low-level protocol autonomously, freeing the CPU for application logic. Wide operating voltage from 2.0 V to 3.6 V on the LF (low-voltage) variant enables direct Li-ion battery operation without external regulators.
Typical applications include USB HID peripherals such as keyboards, mice and game controllers, USB-to-UART bridges, data loggers with USB connectivity, low-power sensor nodes with USB charging, and consumer electronics requiring plug-and-play USB device functionality. Industrial HMI panels and medical instrumentation also leverage the integrated USB for firmware updates and data export.
When designing with this MCU, allocate sufficient PCB area for the 28-SOIC decoupling network and route the USB D+/D- pair as a 90-ohm differential pair. Configure the on-chip voltage regulator carefully: the LF variant requires an external 3.3 V rail for the core, while the F variant includes an internal 2.5 V regulator.
This page synthesizes verified distributor pricing, pin-compatible drop-in alternatives, and practical design notes not assembled in the manufacturer datasheet alone.
Alternativas drop-in para PIC18LF27J53T-I/SO — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC18LF27J53T-I/SO (mesmo formato e footprint) — diferindo em Package, Core Architecture, Operating Temperature, ADC, I/O Pins.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18LF27J53-I/SO
✅ Drop-In✓ Em estoque
$4.52 / unidade
Ver ficha técnica →PIC18F27J53T-I/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F27J53-I/SO
✅ Drop-In✓ Em estoque
$3.23 / unidade
Ver ficha técnica →PIC18LF26J53-I/SO
✅ Drop-In✓ Em estoque
$2.41 / unidade
Ver ficha técnica →PIC18LF26J50T-I/ML
✅ Drop-In✓ Em estoque
$2.5 / unidade
Ver ficha técnica →PIC18LF27J53T-I/SO Classificações máximas e características elétricas
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 128 KB (64K x 16) |
| RAM Size | 3.8 KB |
| Operating Frequency | 48 MHz (12 MIPS) |
| Number of I/O Pins | 22 |
| ADC | 10-channel 12-bit |
| USB Interface | USB 2.0 Full-Speed Device/Host/OTG |
| Supply Voltage (LF variant) | 2.0 V to 3.6 V |
| Temperatura de operação | -40C to +85C (Industrial) |
| Encapsulamento | 28-SOIC (SO) |
| Tipo de montagem | Surface Mount |
| Timers | 4 (8-bit/16-bit) |
| Communication Interfaces | 2x EUSART, 2x I2C, 2x SPI |
| Low-Power Mode | nanoWatt XLP Deep Sleep |
| Status RoHS | Compliant |
Configuração de pinos do PIC18LF27J53T-I/SO
| Pino 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| Pino 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| Pino 3 | RA2/AN2/VREF- — Digital I/O / Analog input / ADC VREF- |
| Pino 4 | RA3/AN3/VREF+ — Digital I/O / Analog input / ADC VREF+ |
| Pino 5 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pino 6 | RA5/AN4 — Digital I/O / Analog input channel 4 |
| Pino 7 | VSS — Ground reference |
| Pino 8 | OSC1/CLKIN — Crystal oscillator input / external clock |
| Pino 9 | OSC2/CLKOUT — Crystal oscillator output |
| Pino 10 | RC0/SOSCO — Digital I/O / Secondary oscillator output |
| Pino 11 | RC1/SOSCI — Digital I/O / Secondary oscillator input |
| Pino 12 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM |
| Pino 13 | VDD — Positive supply voltage (2.0-3.6V) |
| Pino 14 | RB0/AN12/INT0 — Digital I/O / Analog input / External interrupt 0 |
| Pino 15 | RB1/AN10 — Digital I/O / Analog input |
| Pino 16 | RB2/AN8 — Digital I/O / Analog input |
| Pino 17 | RB3/AN9 — Digital I/O / Analog input |
| Pino 18 | RB4/AN11 — Digital I/O / Analog input |
| Pino 19 | RB5/AN13 — Digital I/O / Analog input |
| Pino 20 | RB6/PGC — Digital I/O / ICSP clock |
| Pino 21 | RB7/PGD — Digital I/O / ICSP data |
| Pino 22 | RC3 — Digital I/O |
| Pino 23 | RC4/D-/VMO — Digital I/O / USB D- / ICSP output |
| Pino 24 | RC5/D+/VPO — Digital I/O / USB D+ / ICSP output |
| Pino 25 | RC6 — Digital I/O |
| Pino 26 | RC7 — Digital I/O |
| Pino 27 | AVDD — Analog positive supply |
| Pino 28 | AVSS — Analog ground |
Aplicações típicas
PIC18LF27J53T-I/SO é adequado para 7 aplicaçãos: USB HID Peripherals, USB-to-UART Bridge, Portable Data Logger with USB Output, USB Charging and Power Monitor, Consumer Electronics with USB Firmware Update, Industrial Sensor Hub with USB, Medical Point-of-Care USB Device.
USB HID Peripherals
The PIC18LF27J53T-I/SO is purpose-built for USB Human Interface Device peripherals including keyboards, mice, game controllers and presentation remotes. Its integrated full-speed USB 2.0 SIE eliminates the need for external USB interface chips, while the 128 KB Flash comfortably holds USB HID class stacks alongside application firmware. The 2.0 V to 3.6 V supply range lets the MCU draw power directly from a USB port or a single-cell Li-ion battery, and the nanoWatt XLP deep-sleep modes cut quiescent current below 100 nA when the host is suspended - critical for always-on USB devices that must remain enumerated. The 10-channel 12-bit ADC handles analog inputs such as scroll wheels, while 22 I/O pins provide ample matrix-scanning capacity for keyboards.
Recomendado
USB-to-UART Bridge
With two Enhanced USART channels and full-speed USB on-chip, the PIC18LF27J53T-I/SO serves as a single-chip USB-to-UART bridge replacing legacy FTDI cables. Designers can implement the CDC class entirely in firmware, supporting baud rates up to 921600 over USB while driving a 3.3 V logic-level UART to a target MCU. The 3.8 KB RAM and 128 KB Flash are sufficient to embed vendor-specific protocol extensions, and the wide 2.0 V to 3.6 V supply eliminates the need for a separate level translator when interfacing with 1.8 V targets. This bridge topology is widely used in development boards, firmware update tools, and industrial field-tester handhelds.
Recomendado
Portable Data Logger with USB Output
The combination of 128 KB Flash for local storage, 3.8 KB RAM for FIFO buffering, and integrated USB 2.0 makes the PIC18LF27J53T-I/SO a strong fit for portable data loggers. Sensor data from the 10-channel 12-bit ADC can be time-stamped via the on-chip RTCC and stored to Flash, then exported to a host PC as a USB mass storage device by implementing the Bulk-Only Transport class. The nanoWatt XLP technology extends battery life for field deployment, while the 2.0 V minimum supply enables direct Li-ion battery operation. Typical use cases include environmental monitors, fleet telematics dongles, and medical wearables that offload recorded data via USB.
Recomendado
USB Charging and Power Monitor
The PIC18LF27J53T-I/SO integrates both USB 2.0 and a 12-bit ADC, making it suitable for USB charging and power-monitoring applications. The ADC measures VBUS voltage, charge current, and battery temperature, while USB signaling negotiates USB BC 1.2 or proprietary charging protocols. The 22 I/O pins drive indicator LEDs and accept user input from buttons, all while nanoWalt XLP keeps quiescent draw low. This topology is widely used in portable power banks, smart USB hubs, and bench-top USB analyzers where cost-sensitive USB intelligence is required without an external PHY.
Recomendado
Consumer Electronics with USB Firmware Update
Many consumer products use the PIC18LF27J53T-I/SO as a USB firmware-update co-processor or as the main MCU in low-cost USB devices such as toys, e-readers and Bluetooth adapter dongles. The 128 KB Flash holds both the USB bootloader and application image, and the bootloader can be locked to enforce signed updates. The 28-SOIC footprint is friendly to cost-sensitive PCBs, and the LF variant's 2.0 V minimum enables direct Li-ion designs. Designers appreciate the broad Microchip ecosystem including MPLAB X IDE, XC8 compiler and Harmony framework for rapid USB class implementation.
Recomendado
Industrial Sensor Hub with USB
The PIC18LF27J53T-I/SO fits industrial sensor hubs that aggregate analog and digital sensor data and expose it to a host PC over USB. The 10-channel 12-bit ADC accepts multiple 4-20 mA or 0-10 V transducer inputs through external signal conditioning, while two EUSART, two I2C and two SPI channels support digital sensor peripherals. The industrial -40C to +85C operating range matches harsh factory environments, and the integrated USB enables direct configuration by technicians without specialized programmers. This topology is common in test fixtures, lab instrumentation front-ends and SCADA remote I/O adapters.
Recomendado
Medical Point-of-Care USB Device
Low-power medical devices such as glucose meters, pulse oximeters and handheld diagnostic tools leverage the PIC18LF27J53T-I/SO's integrated USB, 12-bit ADC and nanoWatt XLP technology. The ADC reads sensor front-ends (photodiode, electrochemical strip, etc.) with 12-bit resolution, while USB transmits readings to a clinician's PC or mobile device. The 2.0 V to 3.6 V supply supports direct Li-ion battery operation, and deep-sleep below 100 nA extends shelf life. The 28-SOIC package allows room for opto-isolators in patient-contact isolation barriers, and Microchip's Class B safety library simplifies IEC 60730 firmware qualification.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF27J53T-I/SO — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18LF27J53-I/SO | PIC18F27J53T-I/SO | PIC18F27J53-I/SO | PIC18LF26J53-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (SO) | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB |
| RAM Size | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB | 3.8 KB |
| USB 2.0 | Full-Speed Device/Host/OTG | Full-Speed Device/Host/OTG | Full-Speed Device/Host/OTG | Full-Speed Device/Host/OTG | Full-Speed Device/Host/OTG |
| Operating Voltage | 2.0 V to 3.6 V (LF) | 2.0 V to 3.6 V (LF) | 2.15 V to 3.6 V (F, internal regulator) | 2.15 V to 3.6 V (F, internal regulator) | 2.0 V to 3.6 V (LF) |
| Maximum Frequency | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS | 48 MHz / 12 MIPS |
| Internal Regulator | No (external 3.3 V required) | No | Yes, 2.5 V internal | Yes, 2.5 V internal | No |
| Tape and Reel | Yes (-T suffix) | No (no -T) | Yes | No | No |
Principais diferenciais
- Lowest minimum supply voltage in J-series USB family (vs PIC18F27J53T-I/SO)
- Tape-and-reel packaging (vs PIC18LF27J53-I/SO)
- Largest Flash in 28-SOIC PIC18 USB line (vs PIC18LF26J53-I/SO)
- Single-chip USB without external PHY (vs NXP LPC1343 (cross-brand))
Notas de projeto
The PIC18LF27J53T-I/SO requires an external 3.3 V regulated supply on VDD (pin 13) and AVDD (pin 27) because the LF silicon omits the internal core regulator. Place a 100 nF decoupling capacitor within 5 mm of each VDD pin and a bulk 4.7 uF tantalum near the package. The F variant (PIC18F27J53T-I/SO) integrates a 2.5 V core regulator and adds about 1 mA quiescent overhead but simplifies USB bus-powered designs by allowing direct 5 V VBUS-to-VDD connection through a ferrite bead.
Route the USB D+ (RC5, pin 24) and D- (RC4, pin 23) pair as a 90-ohm differential trace with continuous ground reference, matched length within 150 mil. Place the 15 kohm pull-down on D- and 1.5 kohm pull-up on D+ as required by USB full-speed. Add a TVS diode (USBLC6-2SC6) on the D+/D- pair for ESD protection, and a 4.7 uF tantalum + 100 nF ceramic on VBUS. Keep traces short to comply with USB 2.0 signal-integrity masks.
Do not confuse the LF and F variants: PIC18LF27J53 needs an external 3.3 V core rail, while PIC18F27J53 includes an internal 2.5 V core regulator. Mixing them up causes brown-out resets on the F variant or damage on the LF variant. Also confirm that VUSB (pin 14 area on QFN packages) is tied to VDD via a 220 nF cap - omitting this cap prevents USB enumeration. Finally, the ICSP pins RB6/RB7 share digital I/O, so disable the debugger before firmware release to free these pins for application use.
At 48 MHz and 3.3 V with all peripherals active, the PIC18LF27J53T-I/SO draws roughly 15-20 mA, dissipating about 70 mW. The 28-SOIC package theta_JA is around 70 C/W, so junction rise is 5 C above ambient - well within industrial range. However, in enclosed USB enclosures without airflow, ambient can rise to 60 C; ensure junction stays below 100 C for AEC-Q100-style reliability.
Keep the 12-bit ADC analog inputs (RA0-RA5, RB1-RB5) physically separated from the USB D+/D- pair and switching power traces. Place the analog ground AVSS (pin 28) as a separate ground island tied to VSS at a single point near the MCU. Use a guard ring around sensitive analog traces if precision better than 10 LSB is required. Source: Microchip PIC18F47J53 family datasheet, section on ADC layout.
Informações de conformidade
RoHS compliant per Microchip product page. Industrial temperature range -40C to +85C. Not AEC-Q100 qualified - this is the consumer/industrial grade, not the automotive Q-grade variant.
