PIC18LF4423-I/PT - 8-Bit 40MHz 16KB Flash MCU | Microchip
MPN: PIC18LF4423-I/PT ✓ AktifPIC18LF4423-I/PT Ringkasan
What is a PIC18 microcontroller? PIC18 microcontrollers are 8-bit RISC MCUs built on Microchip's enhanced Harvard architecture, supporting up to 16 MIPS throughput with a 16-bit instruction word and 8-bit data path. They occupy the mid-tier of the PIC family hierarchy: PIC microcontroller -> 8-bit MCU -> enhanced RISC core -> PIC18 sub-family -> peripheral-rich variants with ADC, PWM, and communication peripherals.
Key features include 36 digital I/O pins, a 10-bit A/D converter with up to 13 channels, multiple serial interfaces (EUSART, MSSP for SPI/I2C), Capture/Compare/PWM modules, and nanoWatt Technology for power-managed sleep modes. The 40 MHz Fosc yields 100 ns instruction cycle with 4x PLL options, supporting demanding real-time control tasks.
The device uses Harvard bus architecture with separate program Flash and data SRAM paths, plus internal 32 kHz oscillator and PLL for flexible clocking. On-board self-programmability via ICSP enables field firmware upgrades, while the enhanced instruction set adds hardware multiply and direct register operations, simplifying C compiler code generation for portable firmware.
Typical applications include industrial control panels, HVAC sensor interfaces, low-power consumer appliances, USB/HID peripherals, and battery-powered instrumentation. Its low-voltage LF operation makes it suitable for 2-3 AA cell designs or 3.3V system rails where standard PIC18F parts would otherwise be incompatible.
Key design consideration: the wide 2.0-5.5V supply range provides flexibility, but designers must respect Vdd minimums during A/D conversions (typically 3.0V for specified 10-bit accuracy); configure ADC acquisition time accordingly.
This page consolidates distributor stock data, parametric drop-in alternatives, and engineering design notes drawn from Microchip documentation to help embedded engineers select and qualify the PIC18LF4423 quickly.
Alternatif penggantian untuk PIC18LF4423-I/PT — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian PIC18LF4423-I/PT (sama faktor bentuk dan footprint) — berbeda di dalam Package, Timers, Communication, ADC, I/O Pins.
PIC18LF4420-I/PT
✅ Drop-InKontak untuk harga
Lihat Datasheet →PIC18F4423-I/PT
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
PIC18LF4523-I/PT
✅ Drop-InKontak untuk harga
Lihat Datasheet →PIC18F4523-I/PT
✅ Drop-InKontak untuk harga
Lihat Datasheet →PIC18LF4423T-I/PT
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →PIC18LF4320-I/PT
✅ Drop-InKontak untuk harga
Lihat Datasheet →PIC18LF4423-I/PT Rating Maksimal & Karakteristik Listrik
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Family | PIC18F (enhanced) |
| Program Memory | 16 KB (8K x 16) Flash |
| RAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Tegangan Pemuat | 2.0 V to 5.5 V (LF series) |
| I/O Pins | 36 |
| A/D Converter | 10-bit, up to 13 channels |
| Paket | 44-pin TQFP (PT), 10x10 mm |
| Suhu Kerja | -40 C to +85 C (Industrial) |
| Serial Interfaces | EUSART, MSSP (SPI/I2C) |
| PWM Modules | CCP/ECCP |
| Timers | Multiple 8/16-bit |
| Tipe Mounting | Surface Mount |
| Level MSL | 3 |
| Status RoHS | Compliant |
| ICSP | In-Circuit Serial Programming |
Konfigurasi Pin PIC18LF4423-I/PT
| Pin produk 1 | MCLR/VPP/RE3 — Master Clear / Programming voltage / Digital I/O RE3 |
| Pin produk 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pin produk 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin produk 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / A/D reference negative |
| Pin produk 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / A/D reference positive |
| Pin produk 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin produk 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Pin produk 8 | RE0/RD — PORTE bit 0 / Read control for parallel port |
| Pin produk 9 | RE1/WR — PORTE bit 1 / Write control for parallel port |
| Pin produk 10 | RE2/CS — PORTE bit 2 / Chip select for parallel port |
| Pin produk 11 | VDD — Positive supply voltage |
| Pin produk 12 | VSS — Ground reference |
| Pin produk 13 | OSC1/CLKI/RA7 — Crystal oscillator input / External clock / PORTA bit 7 |
| Pin produk 14 | OSC2/CLKO/RA6 — Crystal oscillator output / Clock output / PORTA bit 6 |
| Pin produk 15 | RC0/T1OSO/T13CKI — PORTC bit 0 / Timer1 oscillator output / Timer1/3 clock input |
| Pin produk 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| Pin produk 17 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin produk 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin produk 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Pin produk 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Pin produk 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Pin produk 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Pin produk 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin produk 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin produk 25 | RC6/TX/CK — PORTC bit 6 / USART asynchronous transmit / clock |
| Pin produk 26 | RC7/RX/DT — PORTC bit 7 / USART asynchronous receive / data |
| Pin produk 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Pin produk 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Pin produk 29 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Pin produk 30 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Pin produk 31 | VSS — Ground reference |
| Pin produk 32 | VDD — Positive supply voltage |
| Pin produk 33 | RB0/INT0/AN12 — PORTB bit 0 / External interrupt 0 / Analog input 12 |
| Pin produk 34 | RB1/INT1/AN10 — PORTB bit 1 / External interrupt 1 / Analog input 10 |
| Pin produk 35 | RB2/INT2/AN8 — PORTB bit 2 / External interrupt 2 / Analog input 8 |
| Pin produk 36 | RB3/AN9/CCP2 — PORTB bit 3 / Analog input 9 / CCP2 output |
| Pin produk 37 | RB4/AN11 — PORTB bit 4 / Analog input 11 |
| Pin produk 38 | RB5/AN13 — PORTB bit 5 / Analog input 13 |
| Pin produk 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin produk 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin produk 41 | VSS — Ground reference |
| Pin produk 42 | VDD — Positive supply voltage |
| Pin produk 43 | RC0 — PORTC bit 0 (secondary) |
| Pin produk 44 | NC — Not connected (per datasheet) |
Aplikasi Umum
PIC18LF4423-I/PT cocok untuk 7 aplikasis: Industrial Control Panels, HVAC Sensor Interface Boards, Battery-Powered Consumer Appliances, USB/HID Peripheral Devices, Low-Power Instrumentation, LED Lighting Controllers, Automotive Aftermarket Accessories.
Industrial Control Panels
The PIC18LF4423-I/PT's 36 I/O lines, 10-bit ADC, and 40 MHz throughput make it well-suited for industrial control panels requiring multiple sensor inputs and relay outputs. Its 2.0-5.5V LF range allows operation directly from 24V industrial rails stepped down to 5V or 3.3V without additional regulator stages. The EUSART and MSSP peripherals support Modbus RTU over RS-485 and I2C sensor expansion, while PWM modules drive proportional valves and motor speed controllers.
Direkomendasikan
HVAC Sensor Interface Boards
HVAC systems require multiple temperature, humidity, and pressure sensors with reliable data acquisition. PIC18LF4423-I/PT's 13-channel 10-bit ADC handles multiple analog sensor inputs while the EUSART connects to indoor/outdoor unit communication networks. The LF voltage range accommodates 24VAC-rectified supply rails common in HVAC installations. nanoWatt Technology powers sleep modes during low-activity periods to meet energy consumption requirements for ENERGY STAR rated HVAC equipment.
Direkomendasikan
Battery-Powered Consumer Appliances
Low-power consumer appliances operating from 2-3 AA cells benefit from the PIC18LF4423-I/PT's wide 2.0-5.5V LF voltage range. The MCU runs directly from the battery stack without boost regulators, simplifying BOM cost. nanoWatt sleep modes drop current consumption to microamp levels during idle periods, extending battery life for handheld appliances. The 16 KB Flash supports feature-rich user interfaces with LCD or LED segment displays driven through CCP/PWM modules.
Direkomendasikan
USB/HID Peripheral Devices
Custom USB Human Interface Devices (HID) such as programmable keypads, gaming controllers, and measurement instruments use PIC18LF4423-I/PT as the main controller. The MSSP peripheral handles SPI communication to external USB controller chips, while EUSART supports serial debugging during development. The 40 MHz Fosc provides sufficient throughput for HID polling rates above 125 Hz required by gaming applications, and 16 KB Flash holds USB descriptor tables plus custom firmware logic.
Direkomendasikan
Low-Power Instrumentation
Portable test instruments and data loggers need microamp sleep current with quick wake-up for periodic measurements. PIC18LF4423-I/PT's nanoWatt Technology provides sleep modes drawing under 100 nA typical, with RTCC wake-up from internal 32 kHz oscillator. The 10-bit ADC samples battery voltage, sensor inputs, and reference channels; 16 KB Flash stores configuration menus and calibration data; and 256 bytes EEPROM retains user settings across power cycles for handheld multimeter-style products.
Direkomendasikan
LED Lighting Controllers
Architectural and stage LED lighting controllers use PIC18LF4423-I/PT to drive multiple LED channels via hardware PWM with precise color and brightness control. ECCP modules generate complementary PWM outputs for high-side/low-side LED driver MOSFETs, while the ADC monitors current sense resistors for closed-loop brightness regulation. The MSSP peripheral drives WS2812B addressable LED strips via SPI bit-banging, and 16 KB Flash supports DMX-512 protocol parsing for stage lighting applications.
Direkomendasikan
Automotive Aftermarket Accessories
Non-safety automotive aftermarket accessories (interior lighting, gauge clusters, sensor displays) use PIC18LF4423-I/PT for cost-effective 12V-tolerant designs. The 5V-tolerant I/O with external protection handles automotive electrical environments, while the LF voltage range allows operation during cranking transients down to 6V. Note: AEC-Q100 qualification is not provided on the -I/PT Industrial grade; for OEM automotive applications, designers should select AEC-Q100 qualified PIC18 variants.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk PIC18LF4423-I/PT — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | PIC18LF4420-I/PT | PIC18F4423-I/PT | PIC18LF4523-I/PT | PIC18F4523-I/PT | PIC18LF4320-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (PT) | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 16 KB | 16 KB | 16 KB | 48 KB | 48 KB | 8 KB |
| RAM | 768 bytes | 768 bytes | 768 bytes | 3,584 bytes | 3,584 bytes | 512 bytes |
| Supply Voltage | 2.0-5.5 V | 2.0-5.5 V | 4.2-5.5 V | 2.0-5.5 V | 4.2-5.5 V | 2.0-5.5 V |
| Max CPU Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| I/O Pins | 36 | 36 | 36 | 36 | 36 | 36 |
| A/D Converter | 10-bit, 13 ch | 10-bit, 13 ch | 10-bit, 13 ch | 10-bit, 13 ch | 10-bit, 13 ch | 10-bit, 13 ch |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Operating Temperature | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C |
Diferensiator Kunci
- Wide 2.0-5.5V Vdd range (LF series) (vsPIC18F4423-I/PT)
- Three Vdd/Vss pin pairs for noise immunity (vsPIC18LF4320-I/PT)
- Full 16 KB Flash vs downgraded 8 KB (vsPIC18LF4320-I/PT)
Catatan Desain
The PIC18LF4423-I/PT supports 2.0-5.5V Vdd but the 10-bit ADC requires Vdd >= 3.0V to meet specified accuracy. For designs operating near the 2.0V minimum, configure ADC acquisition time to minimum (2 TAD) and disable ADC when not in use. Place a 100 nF decoupling capacitor within 5 mm of each Vdd pin (pins 11, 32, 42) and a bulk 10 uF tantalum or ceramic capacitor near the MCU. The nanoWatt Technology sleep modes (Sleep, Idle, and PRI_RUN with peripheral clock gating) drop quiescent current to under 1 uA in Sleep mode for battery applications.
TQFP-44 layout requires 0.8 mm pitch traces with 0.4 mm clearance. Route oscillator traces (OSC1, OSC2) symmetrically with ground guard ring to minimize EMI; keep crystal traces under 10 mm total length and avoid crossing signal traces. The ICSP pins RB6/PGC and RB7/PGD must remain accessible for in-circuit programming - do not connect external loads that prevent programmer drive. The MCLR/VPP pin (pin 1) requires a 10 kohm pull-up to Vdd and a 100 nF decoupling cap for hardware reset generation.
Do not assume PIC18LF4423-I/PT and PIC18F4423-I/PT are interchangeable: PIC18F minimum Vdd is 4.2V versus PIC18LF's 2.0V. Designs using 3.3V rails must use PIC18LF variants. The configuration word bits (CONFIG1H, CONFIG2L) must be set correctly during programming - particularly the FOSC (oscillator selection) and WDTE (watchdog timer) bits. Brown-out Reset (BOR) must be enabled for battery applications or Vdd may drop below safe threshold without proper MCU reset. Ensure unused I/O pins are configured as outputs (not inputs floating) to minimize current consumption.
Informasi Konformitas
RoHS and REACH compliant per Microchip product declaration. Industrial temperature grade -40C to +85C (I suffix). AEC-Q100 not qualified - select AEC-Q100 qualified PIC18 variants for OEM automotive. Lead-free and halogen-free per Microchip Microchip lead-free/green packaging standard.