TCA9534DWT TI I2C I/O Expander | 16-SOIC | 8-bit, 2.3V-5.5V

Product Overview

The TCA9534DWT 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 quasi-bidirectional I/O port (P0–P7) with high-current drive capability (25 mA sink, 10 mA source). Three address pins (A0, A1, A2) allow up to eight devices on the same bus, enabling expansion up to 64 I/Os. The TCA9534DWT comes in a 16-pin SOIC package and is fully specified for operation from -40°C to +85°C.

Detailed Technical Specifications

Key Features

• 8-bit I2C I/O expander with high-current drive
• Operating supply voltage range: 2.3 V to 5.5 V
• Low standby current consumption (1 µA typical)
• I2C interface supports standard (100 kHz) and fast (400 kHz) modes
• Three hardware address pins allow up to eight devices on the bus
• Open-drain active-low interrupt output (INT) for pin change detection
• Input/output configuration register for flexible direction control
• Polarity inversion register for inverting input data
• Internal power-on reset and noise filter on SCL/SDA
• ESD protection exceeds 2000 V HBM per JESD22-A114

Target Applications

The TCA9534DWT is ideal for applications requiring additional I/O lines in space-constrained designs. Specific examples include:

• 5G base stations: monitoring and control of power amplifiers, fans, and status LEDs
• Automotive dashboard: reading button inputs and controlling indicator lights
• Industrial PLCs: expanding digital I/O for sensor and actuator interfaces
• Smart home hubs: managing GPIO for sensors, relays, and display backlight
• Medical devices: controlling pumps, valves, and user interface buttons
• Server motherboards: monitoring temperature sensors and controlling fan speeds

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for TCA9534DWT. 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

TCA9534DWT 是德州儀器（TI）推出的低電壓 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。該器件具有一個 8 位準雙向 I/O 端口（P0–P7），支持高電流驅動能力（25 mA 灌電流，10 mA 拉電流）。三個地址引腳（A0、A1、A2）允許在同一總線上最多連接八個器件，從而實現最多 64 個 I/O 的擴展。TCA9534DWT 採用 16 引腳 SOIC 封裝，工作溫度範圍為 -40°C 至 +85°C。

詳細技術參數

核心特性

• 8 位 I2C I/O 擴展器，支持高電流驅動
• 工作電源電壓範圍：2.3 V 至 5.5 V
• 低待機電流消耗（典型值 1 µA）
• I2C 接口支持標準（100 kHz）和快速（400 kHz）模式
• 三個硬件地址引腳，允許總線上最多連接八個器件
• 開漏極低電平有效中斷輸出（INT），用於引腳變化檢測
• 輸入/輸出配置寄存器，靈活控制方向
• 極性反轉寄存器，用於反轉輸入數據
• 內部上電復位和 SCL/SDA 噪聲濾波器
• ESD 保護超過 2000 V HBM（符合 JESD22-A114）

典型應用場景

TCA9534DWT 非常適合在空間受限的設計中需要額外 I/O 線的應用。具體示例包括：

• 5G 基站：監控和控制功率放大器、風扇及狀態 LED
• 汽車儀表板：讀取按鍵輸入並控制指示燈
• 工業 PLC：擴展數字 I/O 用於傳感器和執行器接口
• 智能家居中樞：管理 GPIO 用於傳感器、繼電器和顯示背光
• 醫療設備：控制泵、閥門和用戶界面按鈕
• 服務器主板：監控溫度傳感器並控制風扇轉速

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 TCA9534DWT 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。
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• 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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HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
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