PCF8574ADWR TI I2C I/O Expander | 16-SOIC | 8-bit, 2.3V-5.5V

Product Overview

The PCF8574ADWR from Texas Instruments is a remote 8-bit I/O expander for I2C-bus applications. 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) including latched outputs with high-current drive capability for directly driving LEDs. It operates from a supply voltage range of 2.3 V to 5.5 V and is available in a 16-pin SOIC package. The PCF8574ADWR supports three hardware address pins (A0, A1, A2) allowing up to 8 devices on the same bus, providing a total of 64 I/O pins. The low standby current consumption makes it ideal for battery-powered applications.

Detailed Technical Specifications

Key Features

• 8-bit remote I/O expander for I2C-bus
• Quasi-bidirectional I/O pins with latched outputs
• High-current drive capability (25 mA sink, 10 mA source)
• Low standby current consumption (1 µA max)
• Wide supply voltage range (2.3 V to 5.5 V)
• Three hardware address pins allow up to 8 devices on the bus
• Open-drain active-low interrupt output (INT)
• Compatible with most microcontrollers
• ESD protection exceeds 2000 V HBM
• Available in 16-SOIC package

Target Applications

The PCF8574ADWR is ideal for applications requiring additional I/O pins, such as:

• 5G base station control and monitoring
• Automotive dashboard and infotainment systems
• Industrial automation and PLCs
• Smart home devices (thermostats, lighting control)
• Medical equipment (patient monitors, infusion pumps)
• Consumer electronics (gaming consoles, set-top boxes)
• LED status and alarm indicators
• Server and networking equipment

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for PCF8574ADWR. 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

PCF8574ADWR 是德州儀器 (TI) 推出的遠端 8 位 I/O 擴展器，適用於 I2C 匯流排應用。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)，包括具有高電流驅動能力的鎖存輸出，可直接驅動 LED。它可在 2.3 V 至 5.5 V 的電源電壓範圍內工作，並採用 16 引腳 SOIC 封裝。PCF8574ADWR 支援三個硬體位址引腳 (A0, A1, A2)，允許在同一匯流排上最多連接 8 個器件，總共提供 64 個 I/O 引腳。低待機電流消耗使其非常適合電池供電的應用。

詳細技術參數

核心特性

• 用於 I2C 匯流排的 8 位遠端 I/O 擴展器
• 具有鎖存輸出的準雙向 I/O 引腳
• 高電流驅動能力 (灌電流 25 mA，拉電流 10 mA)
• 低待機電流消耗 (最大 1 µA)
• 寬電源電壓範圍 (2.3 V 至 5.5 V)
• 三個硬體位址引腳，允許匯流排上最多 8 個器件
• 開漏低電平有效中斷輸出 (INT)
• 與大多數微控制器相容
• ESD 保護超過 2000 V HBM
• 採用 16-SOIC 封裝

典型應用場景

PCF8574ADWR 適用於需要額外 I/O 引腳的應用，例如：

• 5G 基地台控制與監控
• 汽車儀表板與資訊娛樂系統
• 工業自動化與可程式邏輯控制器 (PLC)
• 智慧家居設備 (恆溫器、照明控制)
• 醫療設備 (病人監護儀、輸液泵)
• 消費電子 (遊戲主機、機上盒)
• LED 狀態與警報指示燈
• 伺服器與網路設備

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 PCF8574ADWR 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.
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