PCA9538DB TI I2C GPIO Expander | 16-SSOP | 8-bit, 2.3V-5.5V

Product Overview

The PCA9538DB from Texas Instruments is a low-voltage 8-bit I²C-bus 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 with high-current drive capability (25 mA sink current per I/O). The PCA9538DB comes in a compact 16-SSOP package, making it ideal for space-constrained applications.

Detailed Technical Specifications

Key Features

• 8-bit I/O expander for I²C-bus with interrupt output
• Operating supply voltage range: 2.3 V to 5.5 V
• Low standby current consumption: 1 µA typical
• 25 mA sink capability per I/O
• 5 V tolerant I/Os
• Polarity inversion register
• Active LOW open-drain interrupt output
• Internal power-on reset
• No glitch on power-up
• SCL/SDA input noise filter
• Supports hot insertion
• Package: 16-SSOP (DB)

Target Applications

• 5G base station: control and status monitoring of power modules, fans, and LEDs
• Automotive dashboard: reading switch inputs and controlling indicator lights
• Industrial PLC: expanding digital I/O for sensor and actuator interfaces
• Server and networking equipment: managing reset signals and status LEDs
• Consumer electronics: keypad scanning and backlight control

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for PCA9538DB. 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

PCA9538DB 是德州儀器（TI）推出的一款低電壓 8 位 I²C 匯流排 I/O 擴展器，工作電壓範圍為 2.3 V 至 5.5 V。它通過 I²C 介面（串列時鐘 SCL 和串列資料 SDA）為大多數微控制器系列提供通用遠端 I/O 擴展。該器件具有一個 8 位準雙向 I/O 埠，每個 I/O 具有高電流驅動能力（25 mA 灌電流）。PCA9538DB 採用緊湊的 16-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 I²C 匯流排 I/O 擴展器，帶中斷輸出
• 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
• 每個 I/O 具有 25 mA 灌電流能力
• 5 V 耐受 I/O
• 極性反轉暫存器
• 低電平有效開漏中斷輸出
• 內部上電復位
• 上電無突波
• SCL/SDA 輸入雜訊濾波器
• 支援熱插入
• 封裝：16-SSOP (DB)

典型應用場景

• 5G 基地台：電源模組、風扇和 LED 的控制與狀態監控
• 汽車儀錶板：讀取開關輸入並控制指示燈
• 工業 PLC：擴展數位 I/O 以連接感測器和執行器
• 伺服器和網路設備：管理重定訊號和狀態 LED
• 消費電子：鍵盤掃描和背光控制

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 PCA9538DB 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。
• 深港聯動，結算靈活：深圳直發全球，物流高效可靠；支援香港銀行戶口轉賬及多幣種結算。
• 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。
• 符合 RoHS 認證：所有電子元器件均符合國際環保標準及相關安全認證。
• 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
Trusted Partner for Automotive, Industrial, and Hard-to-find Components.
WhatsApp: +852 5209 9691 | Email: [email protected]