PIC18F8390T-I/PT - 8KB Flash 8-bit MCU with LCD Driver | Microchip
MPN： PIC18F8390T-I/PT ✓ 啟用中PIC18F8390T-I/PT 概覽
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory and peripherals onto one silicon die. Within the broader taxonomy, the PIC18F family sits in Microchip's high-performance 8-bit line, above the baseline PIC10/12/16 families, and is positioned alongside 16-bit PIC24 and dsPIC devices as well as 32-bit ARM Cortex-M parts in the wider microcontroller market. This product's specific role is as a low-power, peripheral-rich node for human-machine interface applications.
Key features include an integrated LCD driver capable of multiplexing up to 192 segments, nanoWatt power management for ultra-low standby current, and 70 I/O pins for external interfacing. The device supports 16-bit wide data bus architecture and offers up to 10 MIPS throughput at 40 MHz, providing substantial headroom for control loops and UI rendering. It includes multiple communication peripherals (I2C, SPI, USART) plus 12-bit ADC channels for sensor acquisition.
The PIC18F8390 uses a modified Harvard architecture with a 16-bit instruction word and 8-bit data path, optimized for C compiler efficiency and deterministic interrupt handling. The integrated LCD driver eliminates the need for an external display controller chip, reducing BOM cost and PCB area in meter and panel designs.
Typical applications include handheld meters, thermostats, home security panels, and power/gas/water metering products where segment LCDs and low standby current are critical. The wide I/O count also suits industrial control panels and medical dosing devices requiring multiple buttons and indicator LEDs.
When designing with this device, ensure the LCD bias network matches the expected number of segments and multiplexing level to achieve optimal contrast. Use the nanoWatt sleep modes during idle periods to extend battery life in portable meters. Pins assigned to analog functions must be configured correctly to avoid parasitic current draw.
This page synthesizes distributor availability, drop-in PIC18 family alternatives, and practical design notes not found in the bare datasheet, giving engineers a one-stop reference for design-in and sourcing decisions.
直接替換替代品，適用於 PIC18F8390T-I/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18F8390T-I/PT （相同外形與佔位） — 差異在於 Package, ADC, Operating Temperature, Core Architecture, I/O Pins.
PIC18F8390-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F8490-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F8590-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F67J90-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F67K90-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F65K90T-I/MRRSL
✅ 直接替換聯絡詢價
查看資料表 →PIC18F8390T-I/PT 最大額定值與電氣特性
| Architecture | 8-bit PIC18 RISC (modified Harvard) |
| Program Memory (Flash) | 8 KB |
| Data RAM | 768 bytes |
| 最大時脈頻率 | 40 MHz |
| Performance | 10 MIPS |
| 供應電壓 | 4.2 V to 5.5 V |
| I/O Pins | 70 |
| 資料匯流排寬度 | 16-bit (instruction word) |
| LCD Driver | Integrated, up to 192 segments |
| ADC | 12-bit, multi-channel |
| Communication Peripherals | I2C, SPI, USART (Enhanced) |
| Power-Saving Technology | nanoWatt (multiple idle/sleep modes) |
| 工作溫度 | -40C to +85C (Industrial) |
| 封裝 | TQFP-80 (PT), 12 x 12 mm, 1 mm height |
| 安裝類型 | Surface Mount |
| Lead-Free / RoHS | Per Microchip product page |
PIC18F8390T-I/PT tqfp-80 (pt), 12 x 12 mm, 1 mm height 腳位配置指南
PIC18F8390T-I/PT（tqfp-80 (pt), 12 x 12 mm, 1 mm height 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： PIC18F8390T-I/PT.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC18F8390T-I/PT 適用於 6 應用s: Handheld Utility Meters, Thermostat Control Panels, Home Security Panels, Industrial Operator Panels, Medical Infusion Pumps, Automotive Dashboard Sub-Displays.
Handheld Utility Meters
The PIC18F8390T-I/PT is well matched to handheld utility meters thanks to its integrated LCD driver for 192 segments and 8 KB Flash for metering algorithms. The nanoWatt sleep modes drop standby current into the microampere range, extending battery life in portable water, gas or electric meters. The 70 I/O lines accommodate pulse inputs from flow sensors, optical encoder interfaces, and tamper-detection switches without an external I/O expander.
推薦
Thermostat Control Panels
The PIC18F8390T-I/PT fits wall-mount thermostat panels because the integrated LCD driver drives multi-digit temperature, humidity, and status displays without an external controller. The 12-bit ADC captures thermistor or analog sensor inputs, while the 70 I/O pins manage keypad scanning, relay drivers and backlight PWM. The 40 MHz core provides ample headroom for PID loops driving HVAC actuators and Compressor timing.
推薦
Home Security Panels
The PIC18F8390T-I/PT serves home security panels by combining its 70 I/O pins for zone monitoring, integrated LCD for status display, and USART for cellular or RF module connectivity. The 8 KB Flash accommodates event-logging firmware and keypad debouncing, while nanoWatt sleep maintains a multi-year backup-battery life during mains outages. The industrial temperature grade supports garage and unconditioned-space installations.
推薦
Industrial Operator Panels
The PIC18F8390T-I/PT drives industrial operator panels where a segment LCD displays machine status, counts, and alarms. The 70 I/O lines handle push-button matrices, encoder feedback and digital outputs to PLCs, while the 12-bit ADC monitors analog sensors such as pressure or temperature transducers. The wide 4.2 V to 5.5 V supply range tolerates noisy 24 V industrial rails after regulation.
推薦
Medical Infusion Pumps
The PIC18F8390T-I/PT supports portable medical infusion pumps where its LCD driver shows dosage and battery status, the 12-bit ADC reads flow-rate sensors, and the USART links to wireless nurse-call modules. The nanoWatt sleep extends battery life between charges, while the 8 KB Flash implements safety interlocks and audible alarm sequencing. Industrial temperature grade ensures reliable operation in clinical environments.
推薦
Automotive Dashboard Sub-Displays
The PIC18F8390T-I/PT powers secondary automotive dashboard sub-displays such as trip computers, gear position indicators, or maintenance reminders using the integrated LCD driver. CAN or LIN connectivity is available through the USART, while the 70 I/O pins drive segmented indicator lamps and button backlighting. The 40 MHz throughput renders multi-digit mileage and timer updates smoothly without flicker.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F8390T-I/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18F8390-I/PT | PIC18F8490-I/PT | PIC18F8590-I/PT | PIC18F67J90-I/PT | PIC18F67K90-I/PT | PIC18F65K90T-I/MRRSL |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-80 (PT) | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same | TQFP-80 (PT) - same |
| Flash Memory | 8 KB | 8 KB | 16 KB | 48 KB | 64 KB | 64 KB | 32 KB |
| RAM | 768 bytes | 768 bytes | 1.5 KB | 3.5 KB | 3.9 KB | 3.9 KB | 2 KB |
| Maximum Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 64 MHz | 64 MHz |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 3.6 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| I/O Pins | 70 | 70 | 70 | 70 | 67 | 67 | 67 |
| LCD Driver | Yes, 192 segments | Yes, 192 segments | Yes, 192 segments | Yes, 192 segments | Yes | Yes | Yes |
| Temperature Grade | Industrial (-40C to +85C) | Industrial | Industrial | Industrial | Industrial | Industrial | Industrial |
| Approx Unit Price (USD, qty 1) | 6.85 | 6.85 | 7.50 | 8.90 | 7.10 | 6.95 | 7.20 |
主要差異化特點
- Integrated LCD driver for 192 segments at 5 V (對比PIC18F67K90-I/PT)
- Largest memory in 80-pin TQFP family at this position (對比PIC18F8390-I/PT)
- Same package as higher-memory PIC18F8490/8590 (對比PIC18F8490-I/PT)
設計說明
The PIC18F8390T-I/PT operates from 4.2 V to 5.5 V; supply noise above 50 mVpp can couple into the LCD charge pump and degrade segment contrast. Decouple VDD with a 100 nF ceramic plus 10 uF bulk capacitor within 5 mm of the supply pins. For battery-backed metering, switch to nanoWatt sleep mode (IDLE or SLEEP) during idle windows to drop current below 100 nA typical, and use the on-chip low-power Timer1 oscillator (32 kHz) for RTC wake-up.
Route the LCD segment and common lines as parallel traces with consistent spacing to maintain balanced capacitance across the glass. Place the bias resistors and capacitors (typically 100 kohm and 0.1 uF) close to the VLCD pin. Avoid routing digital signals under the LCD connector area to prevent ghosting. Use a guard trace tied to VSS around high-impedance analog inputs to reduce leakage and crosstalk.
Do not configure pins as analog inputs by default - they default to digital on reset and must be explicitly set to analog via ANSEL registers to avoid parasitic current draw from floating digital inputs. Always set the oscillator configuration bits (CONFIG1H) before enabling the PLL or switching to HS mode. The ICSP/ICD pins (RB6/RB7) must be left unused or pulled in a way that does not interfere with in-circuit programming or debugging.
合規資訊
Lead-free matte-tin finish per Microchip product page; PT suffix TQFP is RoHS compliant. Industrial temperature grade only; not AEC-Q100 qualified for automotive - choose PIC18F66K80 family for AEC-Q100 applications.
