PIC18LF4423T-I/PT - 8-bit MCU, 16KB Flash, 40MHz, TQFP-44
N.º da peça: PIC18LF4423T-I/PT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $5.85 | $5,85 |
| 10 | $5.27 | $52,70 |
| 100 | $4.68 | $468,00 |
| 500 | $4.21 | $2.105,00 |
| 1.000 | $3.77 | $3.770,00 |
PIC18LF4423T-I/PT Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral interfaces. Within the broader taxonomy of embedded semiconductors, the PIC18 family sits above generic 8-bit MCUs and below 16/32-bit MCUs such as dsPIC and ARM Cortex-M parts. The 'LF' prefix in PIC18LF4423 denotes a wide-voltage, low-power variant of the F-series core, while 'nanoWatt' refers to Microchip's suite of power-saving modes including Sleep, Idle, and ultra-low-power ADC operation.
The PIC18LF4423T-I/PT integrates a 10-bit A/D converter with up to 13 input channels, capture/compare/PWM modules, an Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART), Master I2C and SPI interfaces with Inter-Integrated Circuit bus support, and parallel slave port for external memory expansion. The integrated nanoWatt technology enables deep-sleep currents below typical PIC18 baselines, making it well-suited to battery-powered applications. Industrial-grade temperature range of -40C to +85C is supported via the 'I' designator.
Architecturally, the device uses Microchip's RISC core with 77 instructions and a modified Harvard architecture providing separate program and data buses, plus an 8-level hardware stack. The 16KB Flash supports self-programming and In-Circuit Serial Programming (ICSP) via two pins. Internal oscillator options and a 16x8 hardware multiplier round out the engineer's toolset for cost-sensitive 8-bit designs.
Typical applications include industrial control sensor interface boards, USB-interface bridges, small LCD display controllers, low-speed motor control drivers, and remote sensor nodes. The 16KB Flash and 10-bit ADC provide enough headroom for PID loops and basic signal conditioning without resorting to a 32-bit MCU.
When designing with this part, pay attention to the 5.5V absolute maximum on VDD. Use decoupling capacitors of 0.1uF plus 10uF bulk close to the power pins, and ensure the MCLR reset line has a proper pull-up. For low-power Sleep mode, use the Run/Idle/Stop nanoWatt modes and shut down the ADC to achieve minimum quiescent draw.
This page synthesizes distributor pricing, drop-in TQFP-44 alternatives, and practical PCB design notes not consolidated in the manufacturer datasheet, with cross-references back to Microchip's official PIC18LF4423 datasheet.
Alternativas drop-in para PIC18LF4423T-I/PT — 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 PIC18LF4423T-I/PT (mesmo formato e footprint) — diferindo em Operating Temperature, Program Memory (Flash), Package, Timers, ADC.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18LF4423-I/PT
✅ Drop-In✓ Em estoque
$3.58 / unidade
Ver ficha técnica →PIC18F4423T-I/PT
✅ Drop-In✓ Em estoque
$1.97 / unidade
Ver ficha técnica →PIC18LF4320T-I/PT
✅ Drop-In✓ Em estoque
$4.15 / unidade
Ver ficha técnica →PIC18LF4321-I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF4420T-I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18LF4410-I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$4.18 / unidade
Ver ficha técnica →PIC18LF4423T-I/PT Classificações máximas e características elétricas
| Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 16 KB (8K x 16) |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 40 MHz |
| Instruction Throughput | 16 MIPS |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 34 |
| ADC | 10-bit, up to 13 channels |
| Timers | 8-bit / 16-bit (multiple) |
| Communication | EUSART, I2C, SPI, PSP |
| Encapsulamento | 44-pin TQFP (10x10 mm) |
| Temperatura de operação | -40 C to +85 C (Industrial) |
| Power-Saving Modes | nanoWatt (Sleep, Idle, ADC-off) |
| Tipo de montagem | Surface Mount |
| Nível MSL | 3 (168 hours) |
| Status RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes (per datasheet) |
Guia de Configuração de Pinos do PIC18LF4423T-I/PT 44-pin tqfp (10x10 mm)
Configuração de pinos para PIC18LF4423T-I/PT (pacote 44-pin tqfp (10x10 mm)). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para PIC18LF4423T-I/PT.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
PIC18LF4423T-I/PT é adequado para 7 aplicaçãos: Industrial Sensor Interface Board, Small LCD / Display Controller, Low-Speed Motor Control Driver, USB-Serial / Connectivity Bridge, Battery-Powered Remote Sensor Node, Industrial Automation I/O Module, Educational / Development MCU Platform.
Industrial Sensor Interface Board
The PIC18LF4423T-I/PT is a strong fit for industrial sensor aggregation boards because its 10-bit ADC with up to 13 channels lets engineers digitise analogue signals (temperature, pressure, 4-20mA loops) without external ADC ICs, while the 2.0V-5.5V VDD range simplifies interface to 3.3V digital sensors and 5V analog front-ends on the same board. According to the Microchip datasheet, the ADC supports automatic acquisition and conversion across 13 channels, and the 16KB Flash is sufficient for PID loops and on-board calibration tables. Performance stands out at 16 MIPS versus 8/16-bit predecessors, enabling faster control loops. Pair with a 2.5V reference and watch the nanoWatt Sleep mode for battery-backed installations.
Recomendado
Small LCD / Display Controller
The PIC18LF4423T-I/PT drives character and small graphic LCD panels via its built-in parallel slave port (PSP) and EUSART, eliminating the need for an external display driver. With 34 digital I/O pins and enough code space (16KB), a single MCU handles the entire display controller task including font tables and screen protocol. Compared to smaller PIC16 variants, the 768-byte RAM and 16 MIPS throughput give headroom for 4-bit/8-bit parallel bus interfaces without scan-line jitter. The wide-voltage supply range simplifies shared rail designs with backlight drivers.
Recomendado
Low-Speed Motor Control Driver
For brushed DC or stepper motor drivers, the PIC18LF4423T-I/PT provides capture/compare/PWM (CCP) modules and the Enhanced CCP module for high-resolution PWM at low speeds, while the 13-channel ADC samples motor current and back-EMF for closed-loop control. With 16 MIPS throughput, the MCU executes 8-bit PID loops at rates fast enough for small BLDC motors. The 5.5V absolute maximum on VDD must be respected when paired with high-side gate drivers; a simple LDO between the motor supply and the MCU is recommended. The nanoWatt Sleep modes are valuable for battery-driven fan controllers where quiescent current matters.
Recomendado
USB-Serial / Connectivity Bridge
The PIC18LF4423T-I/PT operates as the host side of a USB-to-UART/USB-to-SPI bridge when paired with a USB-capable counterpart such as the PIC18F4550 or PIC18F25K50. The LF4423 brings the protocol handling, encryption, or command-set logic while the USB MCU handles the physical bus. This combination is common in industrial gateways and telemetry equipment that need to expose legacy serial ports over USB. The 16KB Flash is more than enough for the bridge firmware, leaving room for vendor command extensions. The 5.5V input range simplifies co-existence with USB-powered 5V regulators.
Recomendado
Battery-Powered Remote Sensor Node
The wide VDD range of 2.0V to 5.5V plus the nanoWatt low-power modes make the PIC18LF4423T-I/PT a strong candidate for remote sensor nodes powered by 2x AA cells or single-cell Li-ion batteries. The ADC sampling wake-from-Sleep architecture lets the MCU spend most of its life in sub-microamp Sleep and wake periodically to read sensors and transmit via a connected radio. 16KB Flash supports LoRaWAN/Sigfox stack fragments or simple proprietary protocols. Compared to high-performance 32-bit MCUs, this LF4423 draws significantly less quiescent current, extending battery life to years in typical duty-cycled deployments.
Recomendado
Industrial Automation I/O Module
In PLC-style digital I/O modules, the PIC18LF4423T-I/PT concentrates up to 34 channels of digital input or output via its I/O ports and routes field signals back to a higher-level controller over EUSART, SPI, or I2C. The industrial -40C to +85C operating range, robust PIC18 core, and brown-out-resilient supply range are tailored for sub-station environments. PIC18 architecture code-reuse across module variants simplifies platform firmware, and the 16KB Flash accommodates all the IEC 61131 function-block libraries commonly needed. nanoWatt modes reduce heat in DIN-rail enclosures.
Recomendado
Educational / Development MCU Platform
The PIC18LF4423T-I/PT is suitable as the central MCU for educational boards and hobbyist development platforms because the PIC18 instruction set is widely taught, MPLAB X IDE and XC8 compilers are free, and the 44-pin TQFP with 34 I/O pins leaves generous breadboard-friendly access through breakout boards. 16KB Flash and 768 bytes of RAM can support meaningful projects like robot controllers, line followers, and IoT edge nodes. The LF variant tolerates 2.0V-5.5V, simplifying student power-supply experiments.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18LF4423T-I/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC18LF4423-I/PT | PIC18F4423T-I/PT | PIC18LF4320T-I/PT | PIC18LF4321-I/PT | PIC18LF4420T-I/PT | PIC18LF4410-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Flash Memory | 16 KB | 16 KB | 16 KB | 8 KB | 8 KB | 16 KB | 16 KB |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Maximum Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| USB Support | No | No | No | No | Yes (USB-capable family) | No | No |
Principais diferenciais
- Wide 2.0V to 5.5V VDD range with full nanoWatt power management (vs PIC18F4423T-I/PT)
- Largest Flash memory in its sub-class with TQFP-44 footprint (vs PIC18LF4320T-I/PT (8KB))
- 13-channel 10-bit ADC versus 8-channel on lower-cost variants (vs PIC18LF4420T-I/PT (8-channel ADC))
Notas de projeto
Place a 0.1uF ceramic decoupling capacitor as close as physically possible to each VDD/AVDD pin pair, supplemented by a single 10uF tantalum or ceramic bulk capacitor on the main VDD rail. The PIC18LF4423T-I/PT internal ADC draws switching transients during sample-and-hold; insufficient decoupling causes ADC noise that is impossible to filter digitally after the fact. According to Microchip's PIC18 datasheet, AVDD and AVSS pins must be tied to clean analog supplies even when the ADC is unused. Brown-out reset should be enabled in CONFIG to prevent Flash corruption during supply sag events.
The 44-pin TQFP at 10x10 mm with 0.8 mm lead pitch requires 4-layer PCB with 0.2 mm via-in-pad or solder-mask-defined pads for reliable reflow. Route the ICSP clock/data lines adjacent to MCLR but away from high-frequency switching signals to avoid programming-time interference. Keep the crystal traces short (less than 10 mm) and surround them with a guard ring tied to ground for noise immunity. Estimated: at 40 MHz with HS oscillator mode, total trace mismatch between OSC1 and OSC2 paths should remain below 1 mm.
Do not leave the MCLR pin floating. A 10 kohm pull-up to VDD plus a 100 nF decoupling capacitor to ground provides proper power-on-reset behaviour and prevents spurious resets in noisy environments. Estimated: the MCLR input draws a maximum of 5 uA, so a 10 kohm pull-up is sufficient. Watch for I/O pin voltage clipping - the absolute maximum on any I/O pin is VDD + 0.3V, so do not connect to 5V signals when VDD is at 3.3V. Use the MSSP module rather than bit-banging I2C for reliability over long bus runs.
For designs that exploit the ADC to its 10-bit potential, add a low-pass RC filter (typically 1 kohm + 100 pF) on each analog input to attenuate RF interference beyond the ADC's Nyquist bandwidth. According to the datasheet, acquisition time plus conversion time totals approximately 13 ADC clock cycles in standard mode; using FRC as the ADC clock source decouples ADC performance from the system oscillator. The maximum ADC source impedance is 2.5 kohm in 10-bit mode per the datasheet - higher source impedance causes acquisition-time errors.
Informações de conformidade
RoHS compliant per Microchip product page and supplier data. Industrial temperature grade (-40C to +85C) per the 'I' suffix. Not AEC-Q100 qualified; for automotive designs use a PIC18F variant explicitly AEC-Q100 qualified.