PIC18LF2331T-I/SO - 8-bit PIC18 MCU, 8KB Flash, 40MHz, 28-SOIC | Microchip
N.º da peça: PIC18LF2331T-I/SO ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $6.5 | $6,50 |
| 10 | $5.85 | $58,50 |
| 100 | $5.2 | $520,00 |
| 500 | $4.6 | $2.300,00 |
| 1.000 | $4.1 | $4.100,00 |
PIC18LF2331T-I/SO Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and peripherals such as timers, ADCs, communication interfaces, and I/O pins. The PIC18 family uses an enhanced 8-bit Harvard RISC architecture with a 16-bit instruction word, which keeps code density high while instruction execution remains single-cycle at 40MHz (10 MIPS). MCUs sit at the lowest tier of embedded systems alongside microprocessors, DSPs, and FPGAs, and they are categorized as "8-bit" because their ALU and data bus operate on 8-bit words.
Key features include 8KB (4K x 16) Flash, 768 bytes of RAM, 256 bytes of EEPROM, an integrated 10-bit ADC, enhanced USART, MSSP (SPI/I2C), and dedicated motion-feedback peripherals including a quadrature encoder interface and power-control PWM. The 28-SOIC package is a wide-body gull-wing SOIC suited for hand-soldered prototypes and industrial designs where the small QFN alternative is undesirable. The "LF" silicon allows operation from 2.0V to 5.5V, supporting battery-powered designs.
The PIC18F2331 architecture uses a modified Harvard core with separate program and data buses and a hardware multiply unit, delivering deterministic interrupt response at 10 MIPS. The motion-feedback modules on this die are designed for sensorless or sensored BLDC/PMSM motor control, reducing external component count compared to a generic MCU + external gate-driver approach.
Typical applications include sensorless BLDC motor control, sensored BLDC/PMSM drives, low-voltage industrial automation, fans and pumps, and small appliance control. The 40MHz CPU and motion-control peripherals allow torque/speed loop closure entirely in firmware. Design considerations include selecting a crystal or oscillator that matches the application bandwidth, ensuring the 2.0V minimum is respected for battery-powered designs, and using Microchip's MPLAB X IDE plus MPLAB C18 or XC8 compilers for firmware development.
Alternativas drop-in para PIC18LF2331T-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 PIC18LF2331T-I/SO (mesmo formato e footprint) — diferindo em Package, ADC, Core Architecture, Operating Temperature, I/O Pins.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18LF2331-I/SO
✅ Drop-In✓ Em estoque
$4.88 / unidade
Ver ficha técnica →PIC18LF2331-I/SP
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$3.85 / unidade
Ver ficha técnica →PIC18LF2331T-I/ML
✅ Drop-In✓ Em estoque
$2.85 / unidade
Ver ficha técnica →PIC18LF2331T-I/MM
✅ Drop-In✓ Em estoque
$3.18 / unidade
Ver ficha técnica →PIC18LF2321T-I/SO
✅ Drop-In✓ Em estoque
$3.18 / unidade
Ver ficha técnica →PIC18LF2320T-I/SO
✅ Drop-In✓ Em estoque
$3.75 / unidade
Ver ficha técnica →PIC18LF2331T-I/SO Classificações máximas e características elétricas
| Core Architecture | PIC18 (8-bit Harvard RISC) |
| Program Memory | 8 KB Flash (4K x 16) |
| Data Memory (RAM) | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 40 MHz (10 MIPS) |
| Operating Voltage Range | 2.0 V to 5.5 V (LF low-voltage) |
| I/O Pins | 22 (28-pin SOIC) |
| Encapsulamento | 28-pin SOIC (SO) |
| Temperature Grade | Industrial -40C to +85C |
| Tipo de montagem | Surface Mount (gull-wing SOIC) |
| Packaging | Tape and Reel (T) |
| Motion-Feedback Peripherals | Quadrature Encoder Interface, Power-Control PWM |
| Communication | EUSART, MSSP (SPI/I2C) |
| Status RoHS | Compliant |
Configuração de pinos do PIC18LF2331T-I/SO
| Pino 1 | MCLR — Master Clear (reset) input, active low |
| Pino 2 | RA0/AN0 — Digital I/O / analog input |
| Pino 3 | RA1/AN1 — Digital I/O / analog input |
| Pino 4 | RA2/AN2/VREF- — Digital I/O / analog input / ADC VREF- |
| Pino 5 | RA3/AN3/VREF+ — Digital I/O / analog input / ADC VREF+ |
| Pino 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| Pino 7 | RA5/AN4 — Digital I/O / analog input |
| Pino 8 | VDD — Positive supply voltage |
| Pino 9 | OSC1/RA7 — Crystal oscillator input / digital I/O |
| Pino 10 | OSC2/RA6 — Crystal oscillator output / digital I/O |
| Pino 11 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / clock input |
| Pino 12 | RC1/T1OSI — Digital I/O / Timer1 oscillator input |
| Pino 13 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM 1 |
| Pino 14 | RC3 — Digital I/O |
| Pino 15 | RC4 — Digital I/O |
| Pino 16 | RC5 — Digital I/O |
| Pino 17 | RC6/TX/CK — Digital I/O / EUSART TX / clock |
| Pino 18 | RC7/RX/DT — Digital I/O / EUSART RX / data |
| Pino 19 | VSS — Ground reference |
| Pino 20 | VDD — Positive supply voltage |
| Pino 21 | RB0/INT — Digital I/O / external interrupt |
| Pino 22 | RB1 — Digital I/O |
| Pino 23 | RB2 — Digital I/O |
| Pino 24 | RB3 — Digital I/O |
| Pino 25 | RB4 — Digital I/O |
| Pino 26 | RB5 — Digital I/O |
| Pino 27 | VSS — Ground reference |
| Pino 28 | RB7/PGD — Digital I/O / ICSP data |
Aplicações típicas
PIC18LF2331T-I/SO é adequado para 6 aplicaçãos: Sensorless BLDC Motor Control, Sensored BLDC / PMSM Motor Drive, Low-Voltage Industrial Automation, Small Fan and Pump Controllers, Battery-Powered Small Appliances, HVAC Blower and Damper Control.
Sensorless BLDC Motor Control
The PIC18LF2331T-I/SO is purpose-built for sensorless brushless DC motor control thanks to its integrated power-control PWM module and dedicated motion-feedback peripherals. With 40MHz (10 MIPS) CPU throughput, the firmware can run a sensorless back-EMF zero-crossing algorithm at PWM frequencies up to 20kHz, leaving cycles for the speed PI loop. Its 2.0V-5.5V operating range supports 1-cell Li-ion powered tools, while 22 I/O pins are sufficient for Hall/encoder inputs, fault inputs, and a serial debug link. Compared to a discrete MCU + external gate-driver architecture, this part reduces BOM count and PCB area by integrating the PWM, ADC triggering, and fault handling on-die. The 28-SOIC package remains hand-solder-friendly for low-volume fans, pumps, and small appliances.
Recomendado
Sensored BLDC / PMSM Motor Drive
When sensored BLDC or PMSM control is required, the PIC18LF2331T-I/SO's quadrature encoder interface (QEI) and Power-Control PWM (PCPWM) modules handle the encoder decoding and three-phase PWM generation in hardware. The 8KB Flash accommodates field-oriented-control (FOC) code plus Microchip's application library, while the 256-byte EEPROM stores motor calibration parameters. The industrial -40C to +85C temperature range supports HVAC blowers, e-bike traction motors, and small industrial drives. Designers typically pair this MCU with a three-phase gate driver such as the MCP8026, which accepts the MCU's PWM outputs and drives six N-MOSFETs. The 28-SOIC footprint remains accessible for prototyping while keeping PCB area smaller than equivalent 40-pin PIC18LF4331 designs.
Recomendado
Low-Voltage Industrial Automation
The PIC18LF2331T-I/SO is well-suited to 24V industrial-automation subsystems that step down to 3.3V or 5V logic rails, where the 2.0V-5.5V LF supply range is essential. With 22 I/O and an EUSART plus MSSP (SPI/I2C), it can interface to digital sensors, RS-485 transceivers, and I2C EEPROM/FRAM for parameter logging. The 40MHz CPU enables Modbus RTU polling cycles under 10ms, while the 768-byte RAM holds Modbus buffers plus a small RTOS or cooperative scheduler. Industrial -40C to +85C operation supports cabinet-mounted controls, and the 28-SOIC package survives the vibration and thermal stress typical of factory-floor equipment. Compared to 5V-only PIC18F2331, the LF variant extends battery-backed designs to the same hardware platform.
Recomendado
Small Fan and Pump Controllers
The PIC18LF2331T-I/SO's dedicated motion-control peripherals and PWM module make it a natural fit for variable-speed fan and pump controllers. The PCPWM module drives the switching FET directly while the QEI decodes tachometer feedback; firmware runs a closed-loop RPM controller at 40MHz. With 8KB Flash the part easily fits Microchip's fan-control library and a small UI state machine, leaving cycles for serial diagnostics. The 2.0V minimum supply supports 1-cell Li-ion powered portable fans, while the 28-SOIC package is cost-effective for high-volume CE appliance designs. Compared to using a generic PIC16 plus external gate-driver, this part reduces component count and accelerates time-to-market.
Recomendado
Battery-Powered Small Appliances
The PIC18LF2331T-I/SO is ideal for handheld and battery-powered small appliances where the 2.0V-5.5V LF supply range and integrated motion-control peripherals together minimize external parts. A cordless blender, electric toothbrush, or handheld vacuum can run the MCU directly from a 1-cell Li-ion (3.0-4.2V) without a boost regulator. The PIC18LF2331's nanoWatt power-managed modes drop quiescent current to <1uA in sleep, extending standby battery life by orders of magnitude. The 768-byte RAM holds a small UI stack, while 8KB Flash fits the motor-control firmware plus BLE command parser when paired with an external module. Compared to 5V-only PIC18F2331, the LF variant eliminates the need for a boost converter.
Recomendado
HVAC Blower and Damper Control
In HVAC blower and damper actuators, the PIC18LF2331T-I/SO delivers reliable three-phase or single-phase BLDC control across the full -40C to +85C industrial range. The on-chip power-control PWM and QEI modules handle closed-loop RPM regulation at 40MHz, while the EUSART links to a building-automation bus (Modbus RTU or proprietary protocol) over RS-485. The 256-byte EEPROM stores commissioning parameters and damper calibration, and the 22 I/O pins accommodate end-switches, position feedback, and status LEDs. Compared to a discrete MCU + driver approach, this part reduces PCB area by roughly 30% and simplifies EMI compliance by keeping the PWM traces on-die. The 28-SOIC package survives thermal-cycling in plenum-mounted equipment.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF2331T-I/SO — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18LF2331-I/SO | PIC18LF2331T-I/ML | PIC18LF2331T-I/MM | PIC18LF2321T-I/SO | PIC18LF2320T-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (SO) | 28-SOIC (SO) - same | 28-QFN (ML) - different footprint | 28-QFN (MM) - different footprint | 28-SOIC (SO) - same | 28-SOIC (SO) - same |
| Program Memory (Flash) | 8 KB (4K x 16) | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| Data Memory (RAM) | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 256 bytes |
| Maximum CPU Frequency | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) |
| Motion-Control Peripherals | QEI + Power-Control PWM | QEI + PCPWM - same | QEI + PCPWM - same | QEI + PCPWM - same | Reduced motion set (~10% less) | No motion peripherals |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| Packaging Form | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
Principais diferenciais
- Dedicated motion-control peripherals integrated on-die (vs PIC18F25K22-I/SO)
- Low-voltage 2.0V-5.5V supply range (LF silicon) (vs PIC18F2331-I/SO)
- 28-SOIC package for hand-soldering and prototyping (vs PIC18LF2331T-I/MM)
- nanoWatt power-managed modes for sleep current <1uA (vs PIC18LF2320T-I/SO)
Notas de projeto
The PIC18LF2331T-I/SO has two VDD pins (8 and 20) and two VSS pins (19 and 27). Both VDD pins must be tied together and both VSS pins must be tied together; do not leave a VDD/VSS pair unconnected or the internal analog references will drift. Place a 100nF decoupling capacitor within 5mm of each VDD pin and a bulk 10uF tantalum or ceramic at the package. For battery-powered designs using the LF silicon at 2.0V, ensure the regulator holds above 2.0V at full load including inrush on motor start; 1-cell Li-ion (3.0-4.2V) is comfortable headroom.
Use a 4-layer PCB with a continuous ground plane for the SOIC variant in motor-control designs; switching noise from the PWM traces couples easily back into analog inputs and the QEI lines if the ground is split. Keep the oscillator traces short and surrounded by ground; the 40MHz (10 MIPS) timing budget is tight enough that 2-3cm of stray trace causes measurable jitter on serial communications. Place the ICSP pins (RB6/RB7) on test points or a 2x3 header so firmware can be programmed in-circuit without removing the MCU.
A common pitfall is configuring the oscillator for HS mode above 25MHz without enabling the PLL; the 40MHz maximum requires HS+PLL or external clock input and the configuration bits are write-once after programming. Another pitfall is forgetting to configure the analog pins (RA0-RA5, RB0-RB3) as digital after an ADC read, leaving them as analog inputs and producing unexpected high-impedance behavior on digital reads. Always set ANSEL/ANSELH bits to disable analog on pins used for digital I/O. Finally, the EUSART baud-rate register value at 40MHz Fosc must account for BRGH and BRG16 settings; the SPBRG table in the datasheet is the authoritative source.
When driving motor-control PWMs at high frequency (>15kHz), place a series ferrite bead on the VDD supply and keep the PWM traces away from the QEI input pins. The on-chip Power-Control PWM module can be configured for edge-aligned or center-aligned mode; center-aligned mode reduces harmonic content at the cost of twice the PWM frequency for the same output. For encoder signals, add 1kohm pull-ups on the QEA and QEB lines if the encoder is open-drain; long encoder cables otherwise pick up noise that the QEI miscounts as position pulses.
Informações de conformidade
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified (industrial grade -40C to +85C only).
