PCA9557DR TI I2C I/O Expander | 16-SOIC | 8-bit, 2.3V-5.5V

Product Overview

The PCA9557DR is a 8-bit I2C-bus and SMBus I/O expander from Texas Instruments. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface (serial clock and serial data). The device features an 8-bit quasi-bidirectional I/O port with open-drain outputs and a 3-bit hardware address input, allowing up to eight devices on the same bus. The PCA9557DR operates from a supply voltage range of 2.3 V to 5.5 V and is available in a 16-pin SOIC package. It is designed for low-power consumption and is ideal for applications requiring additional I/O lines.

Detailed Technical Specifications

Key Features

• 8-bit quasi-bidirectional I/O port
• I2C-bus interface with 400 kHz maximum clock frequency
• Low standby current consumption (1.5 µA typical)
• Open-drain outputs with 25 mA sink capability
• 3-bit hardware address input allows up to 8 devices on the same bus
• Power-on reset with all channels set as inputs
• No glitch on power-up
• Operating supply voltage range: 2.3 V to 5.5 V
• ESD protection exceeds 2000 V HBM per JESD22-A114
• Available in 16-pin SOIC package

Target Applications

• 5G base station control and monitoring (e.g., fan control, status LEDs)
• Automotive dashboard switches and indicator lights
• Industrial PLC I/O expansion
• Server and telecom equipment (e.g., blade servers, routers)
• Consumer electronics (e.g., smart home hubs, gaming consoles)
• Medical devices (e.g., patient monitoring systems)

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for PCA9557DR. 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

PCA9557DR 是德州儀器 (TI) 推出的一款 8 位 I2C 匯流排和 SMBus I/O 擴展器。它通過 I2C 介面（串列時鐘和串列資料）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，帶開漏輸出，以及一個 3 位硬體位址輸入，允許在同一匯流排上連接最多八個器件。PCA9557DR 的工作電源電壓範圍為 2.3 V 至 5.5 V，採用 16 引腳 SOIC 封裝。它專為低功耗設計，非常適合需要額外 I/O 線的應用。

詳細技術參數

核心特性

• 8 位準雙向 I/O 埠
• I2C 匯流排介面，最高時鐘頻率 400 kHz
• 低待機電流消耗（典型值 1.5 µA）
• 開漏輸出，灌電流能力 25 mA
• 3 位硬體位址輸入，同一匯流排最多支援 8 個器件
• 上電復位，所有通道預設為輸入
• 上電無突波
• 工作電源電壓範圍：2.3 V 至 5.5 V
• ESD 保護超過 2000 V HBM（符合 JESD22-A114）
• 提供 16 引腳 SOIC 封裝

典型應用場景

• 5G 基地台控制與監控（例如風扇控制、狀態指示燈）
• 汽車儀表板開關與指示燈
• 工業 PLC I/O 擴展
• 伺服器與電信設備（例如刀鋒伺服器、路由器）
• 消費電子（例如智慧家庭中樞、遊戲主機）
• 醫療設備（例如病人監護系統）

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 PCA9557DR 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]