PCF8574DWR TI I2C I/O Expander | 16-SOIC | 8-bit, 400kHz

Product Overview

The PCF8574DWR 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. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power-on, all I/Os default to inputs. The PCF8574DWR operates from a 2.5V to 5.5V supply voltage and supports I2C bus speeds up to 400kHz. Three hardware address pins (A0, A1, A2) allow up to eight devices on the same bus, providing up to 64 additional I/O lines. The device is available in a 16-pin SOIC package (DWR) and is specified over the industrial temperature range of -40°C to +85°C.

Detailed Technical Specifications

Key Features

• 8-bit quasi-bidirectional I/O port with high-current drive
• I2C-bus interface with speeds up to 400kHz
• Three hardware address pins allow up to eight devices on the bus
• Latched outputs with 25 mA sink capability per pin
• Low standby current consumption (1 µA typical)
• Open-drain interrupt output (INT) for change-of-state detection
• Operating supply voltage range: 2.5V to 5.5V
• Industrial temperature range: -40°C to +85°C
• Available in 16-pin SOIC package (DWR)

Target Applications

• 5G base station control and monitoring (e.g., antenna tilt, power supply sequencing)
• Automotive dashboard and infotainment systems (e.g., button matrix, LED indicators)
• Industrial PLC I/O expansion modules
• Smart home controllers (e.g., lighting, sensor interfaces)
• Medical equipment (e.g., patient monitoring, diagnostic devices)
• Server and networking equipment (e.g., fan control, status LEDs)

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for PCF8574DWR. 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

PCF8574DWR 是德州儀器 (TI) 推出的遠程 8 位 I/O 擴展器，用於 I2C 總線應用。它通過 I2C 接口（串行時鐘 SCL 和串行數據 SDA）為大多數微控制器系列提供通用遠程 I/O 擴展。該器件具有一個 8 位準雙向 I/O 端口（P0–P7），包括帶高電流驅動能力的鎖存輸出，可直接驅動 LED。每個準雙向 I/O 可用作輸入或輸出，無需使用數據方向控制信號。上電時，所有 I/O 默認為輸入。PCF8574DWR 在 2.5V 至 5.5V 的電源電壓下工作，支持高達 400kHz 的 I2C 總線速度。三個硬件地址引腳（A0、A1、A2）允許同一總線上最多八個器件，提供最多 64 個額外 I/O 線。該器件採用 16 引腳 SOIC 封裝（DWR），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 位準雙向 I/O 端口，具有高電流驅動能力
• I2C 總線接口，速度高達 400kHz
• 三個硬件地址引腳，允許總線上最多八個器件
• 鎖存輸出，每個引腳灌電流能力 25 mA
• 低待機電流消耗（典型值 1 µA）
• 開漏中斷輸出 (INT)，用於狀態變化檢測
• 工作電源電壓範圍：2.5V 至 5.5V
• 工業溫度範圍：-40°C 至 +85°C
• 採用 16 引腳 SOIC 封裝 (DWR)

典型應用場景

• 5G 基站控制與監控（例如天線傾角、電源排序）
• 汽車儀表盤和信息娛樂系統（例如按鍵矩陣、LED 指示燈）
• 工業 PLC I/O 擴展模塊
• 智能家居控制器（例如照明、傳感器接口）
• 醫療設備（例如病人監護、診斷設備）
• 服務器和網絡設備（例如風扇控制、狀態 LED）

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 PCF8574DWR 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。
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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

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• 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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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]