TCA9554DWT TI I2C I/O Expander | 16-SOIC | 8-bit, 2.3V-5.5V

Product Overview

The TCA9554DWT from Texas Instruments is a low-voltage 8-bit I2C and SMBus I/O expander designed for 2.3-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface (serial clock (SCL) and serial data (SDA)). The device features an 8-bit configuration (input or output) register, an 8-bit output register, and an 8-bit input register. The TCA9554DWT is available in a 16-pin SOIC package and supports up to four devices on the same bus via three address pins (A0, A1, A2).

Detailed Technical Specifications

Key Features

• 8-bit I2C I/O expander with open-drain interrupt output
• Low standby current consumption (1 µA typical)
• I2C bus interface supports standard (100 kHz) and fast (400 kHz) modes
• Three hardware address pins allow up to four devices on the same bus
• Input/output configuration register for each I/O
• Polarity inversion register for input ports
• Internal power-on reset
• No glitch on power-up
• Schmitt-trigger action allows slow input transition
• Package: 16-SOIC (DWT)

Target Applications

• 5G base stations: monitoring and control of power amplifiers, fans, and status LEDs
• Automotive dashboard: reading switch inputs (buttons, knobs) and controlling indicator lights
• Industrial PLCs: expanding digital I/O for sensor and actuator interfaces
• Consumer electronics: TV, set-top box, gaming console for keypad scanning and LED control
• Medical devices: patient monitoring systems for alarm and status indication
• Smart home: lighting control, thermostat interface, and security system I/O expansion

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for TCA9554DWT. Our core advantages include:

• 24/7 Global Customer Support: Professional team providing instant quotes and technical support worldwide.
• In-stock Inventory, Same-day Shipping: We maintain localized stock; orders confirmed before 4 PM are shipped the same day.
• HK-SZ Synergy, Flexible Settlement: Direct global shipping from Shenzhen with support for HK bank transfers and multi-currency.
• Escrow Secured Transactions: We support Escrow.com for secure transactions, ensuring peace of mind for batch orders.
• BOM Kitting & Sampling Services: Specialized sourcing for testing samples and urgent shortage components.

Quality Assurance & Compliance

Jasin Chip guarantees that all delivered products are 100% original factory stock with full quality assurance and traceability.

• 100% Original & Authentic: All components are guaranteed to be authentic with strict quality control.
• RoHS Compliant: All electronic components comply with international environmental and safety standards.
• Original Factory Packaging: We maintain original factory packaging and seals to ensure ESD protection and physical integrity.

產品概述

TCA9554DWT 是德州儀器 (TI) 推出的一款低電壓 8 位 I2C 和 SMBus I/O 擴展器，工作電壓範圍為 2.3 V 至 5.5 V。它通過 I2C 接口（串行時鐘 SCL 和串行數據 SDA）為大多數微控制器系列提供通用遠程 I/O 擴展。該器件包含一個 8 位配置（輸入或輸出）寄存器、一個 8 位輸出寄存器和一個 8 位輸入寄存器。TCA9554DWT 採用 16 引腳 SOIC 封裝，通過三個地址引腳（A0、A1、A2）支持同一總線上最多四個器件。

詳細技術參數

核心特性

• 8 位 I2C I/O 擴展器，帶開漏中斷輸出
• 低待機電流消耗（典型值 1 µA）
• I2C 總線接口支持標準（100 kHz）和快速（400 kHz）模式
• 三個硬件地址引腳允許同一總線上最多四個器件
• 每個 I/O 的輸入/輸出配置寄存器
• 輸入端口的極性反轉寄存器
• 內部上電復位
• 上電無毛刺
• 施密特觸發動作允許慢輸入轉換
• 封裝：16-SOIC (DWT)

典型應用場景

• 5G 基站：監控和控制功率放大器、風扇及狀態 LED
• 汽車儀表板：讀取開關輸入（按鈕、旋鈕）並控制指示燈
• 工業 PLC：擴展數字 I/O 用於傳感器和執行器接口
• 消費電子：電視、機頂盒、遊戲機的鍵盤掃描和 LED 控制
• 醫療設備：病人監護系統的報警和狀態指示
• 智能家居：照明控制、恆溫器接口和安全系統 I/O 擴展

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 TCA9554DWT 提供全面的供應鏈與批發解決方案。 我們的核心優勢包括：

• 全天候環球客戶支援：專業團隊為您提供即時報價及技術支援，無需漫長等待。
• 現貨庫存，即日發貨：確保現貨充足。下午 4 點前確認訂單，即可安排當天寄出。
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• Escrow 擔保交易：支援 Escrow.com 平台交易，保障買賣雙方權益，小批量訂單亦可安心在線下單。
• BOM 配單與樣板服務：提供樣板測試及認證支援。專注一站式 BOM 配套及緊急缺料採購服務。

品質保證與合規

Jasin Chip 承諾所有出貨產品均為原廠正貨，具備完善的品質保證及產品可追溯性。

• 100% 原廠正貨：承諾所有供應零件均為原裝現貨，品質嚴格把關，來源清晰可追溯。
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• 原廠封裝保護：嚴格保留原廠原始包裝及封條，確保物流過程中的靜電防護 (ESD) 與物理安全。

以上產品均為原廠正貨，提供 BOM 配單及現貨庫存支援，歡迎查詢。

HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
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