TCA9538DBR TI I2C GPIO Expander | 16-SSOP | 8-Bit, 1.65-5.5V

Product Overview

The TCA9538DBR is a low-voltage 8-bit I²C and SMBus I/O expander from Texas Instruments. It provides general-purpose remote I/O expansion for most microcontroller families via the I²C interface. The device features an 8-bit bidirectional data register, an 8-bit configuration register, and an 8-bit polarity inversion register. The TCA9538DBR operates from a supply voltage range of 1.65 V to 5.5 V and supports up to 400 kHz I²C clock frequency. It is available in a compact 16-pin SSOP package, making it ideal for space-constrained applications.

Detailed Technical Specifications

Key Features

• 8-bit bidirectional I/O expander with I²C interface
• Operating supply voltage: 1.65 V to 5.5 V
• Low standby current consumption: 1 µA typical
• 5 V tolerant I/O pins
• Polarity inversion register for data inversion
• Configurable interrupt output (INT) for event detection
• Up to four devices on one bus (three address pins)
• ESD protection exceeds JESD 22
• Latch-up performance exceeds 100 mA per JESD 78

Target Applications

• 5G base stations: monitoring and control of power modules, fan speed, 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: GPIO expansion for smart home devices, gaming consoles
• Medical devices: patient monitoring systems requiring additional I/O for alarms and displays

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for TCA9538DBR. 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.

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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

TCA9538DBR 是德州儀器 (TI) 推出的一款低電壓 8 位 I²C 和 SMBus I/O 擴展器。它通過 I²C 接口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 位雙向數據寄存器、一個 8 位配置寄存器和一個 8 位極性反轉寄存器。TCA9538DBR 的工作電源電壓範圍為 1.65 V 至 5.5 V，支持高達 400 kHz 的 I²C 時鐘頻率。它採用緊湊的 16 引腳 SSOP 封裝，非常適合空間受限的應用。

詳細技術參數

核心特性

• 8 位雙向 I/O 擴展器，帶 I²C 接口
• 工作電源電壓：1.65 V 至 5.5 V
• 低待機電流消耗：典型值 1 µA
• 5 V 耐受 I/O 引腳
• 極性反轉寄存器，用於數據反轉
• 可配置中斷輸出 (INT)，用於事件檢測
• 一條總線上最多可連接四個器件（三個地址引腳）
• ESD 保護超過 JESD 22 標準
• 閂鎖性能超過 100 mA，符合 JESD 78 標準

典型應用場景

• 5G 基站：監控和控制電源模塊、風扇轉速及狀態 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：智能家居設備、遊戲機的 GPIO 擴展
• 醫療設備：病人監護系統，需要額外 I/O 用於報警和顯示

環球供應鏈與批發合作夥伴方案

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HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
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