PCA9538DW TI I2C GPIO Expander | 16-SOIC | 8-bit, 2.3V-5.5V

Product Overview

The PCA9538DW 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 (P0–P7) with non-inverting data direction. At power-up, the I/Os are configured as inputs with a weak pull-up to VCC. The PCA9538DW has three address pins (A0, A1, A2) allowing up to eight devices on the same bus. It is available in a 16-pin SOIC package (DW) and is specified over the –40°C to +85°C industrial temperature range.

Detailed Technical Specifications

Key Features

• 8-bit I²C-bus I/O expander with interrupt output (INT)
• Operating supply voltage range: 2.3 V to 5.5 V
• Low standby current consumption: 1 µA max
• I²C bus interface supports standard (100 kHz) and fast (400 kHz) modes
• Three hardware address pins allow up to eight devices on the same bus
• Quasi-bidirectional I/Os with internal pull-up resistors (100 kΩ typical)
• Open-drain active-low interrupt output (INT) for change-of-state detection
• Power-up with I/Os configured as inputs
• No glitch on power-up
• ESD protection exceeds JESD 22 (2000-V HBM, 1000-V CDM)
• Latch-up performance exceeds 100 mA per JESD 78, Class II
• Packaged in 16-pin SOIC (DW) – RoHS compliant

Target Applications

The PCA9538DW is ideal for applications requiring additional I/O ports where space and power are limited. Specific examples include:

• 5G base stations: monitoring and control of power amplifiers, fan speed, and status LEDs
• Automotive dashboard: reading button inputs, controlling backlight LEDs, and managing haptic feedback
• Industrial PLCs: expanding digital I/O for sensor inputs and actuator outputs
• Server motherboards: managing reset signals, power sequencing, and fault detection
• Smart home hubs: interfacing with touch sensors, relays, and indicator lights
• Medical devices: controlling pumps, valves, and user interface buttons

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for PCA9538DW. 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

PCA9538DW 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（P0–P7），帶有同相資料方向。上電時，I/O 配置為輸入，並帶有弱上拉至 VCC。PCA9538DW 具有三個位址引腳（A0、A1、A2），允許在同一匯流排上最多連接八個器件。它採用 16 引腳 SOIC 封裝（DW），並在 –40°C 至 +85°C 的工業溫度範圍內指定。

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 (INT)
• 工作電源電壓範圍：2.3 V 至 5.5 V
• 低待機電流消耗：最大 1 µA
• I²C 匯流排介面支援標準（100 kHz）和快速（400 kHz）模式
• 三個硬體位址引腳允許同一匯流排上最多八個器件
• 準雙向 I/O，帶內部上拉電阻（典型值 100 kΩ）
• 開漏低電平有效中斷輸出 (INT)，用於狀態變化檢測
• 上電時 I/O 配置為輸入
• 上電無突波
• ESD 保護超過 JESD 22（2000-V HBM，1000-V CDM）
• 閂鎖性能超過 100 mA，符合 JESD 78 Class II
• 採用 16 引腳 SOIC (DW) 封裝 – 符合 RoHS 標準

典型應用場景

PCA9538DW 非常適合需要額外 I/O 埠且空間和功耗有限的應用。具體範例包括：

• 5G 基地台：監控和控制功率放大器、風扇轉速及狀態 LED
• 汽車儀表板：讀取按鍵輸入、控制背光 LED 及管理觸覺回饋
• 工業 PLC：擴展數位 I/O 用於感測器輸入和致動器輸出
• 伺服器主機板：管理重置訊號、電源排序及故障檢測
• 智慧家庭中樞：與觸控感測器、繼電器和指示燈介接
• 醫療設備：控制泵、閥門及使用者介面按鈕

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 PCA9538DW 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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HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
Trusted Partner for Automotive, Industrial, and Hard-to-find Components.
WhatsApp: +852 5209 9691 | Email: [email protected]