PCF8575CDWR TI I2C I/O Expander | 24-SOIC | 16-bit, 2.3V-5.5V

Product Overview

The PCF8575CDWR from Texas Instruments is a 16-bit I/O expander for I2C-bus applications, providing general-purpose remote I/O expansion via the two-line bidirectional I2C bus (serial clock (SCL) and serial data (SDA)). The device features a 16-bit quasi-bidirectional input/output (I/O) port, allowing each bit to be independently configured as input or output. The PCF8575CDWR operates from a supply voltage range of 2.3 V to 5.5 V, making it suitable for a wide variety of applications. It is available in a 24-pin SOIC package (DW). The device includes an interrupt output (INT) that can be connected to the microcontroller's interrupt input, providing a means to signal changes on the input pins without continuous polling.

Detailed Technical Specifications

Key Features

• 16-bit remote I/O expander for I2C-bus
• Quasi-bidirectional I/O pins (default high)
• Low standby current consumption
• Open-drain interrupt output
• I2C bus interface supports standard and fast mode (up to 400 kHz)
• Three hardware address pins allow up to 8 devices on the same bus
• Operating supply voltage range: 2.3 V to 5.5 V
• 5 V tolerant I/O pins
• Polarity inversion register allows inversion of input data
• No external pull-up resistors required for I/O pins (internal current sources)

Target Applications

The PCF8575CDWR is ideal for applications requiring additional I/O lines in systems with limited GPIO. Specific examples include:

• 5G base station control boards for monitoring and controlling status LEDs, fans, and reset signals
• Automotive dashboard modules for reading switch inputs and driving indicator lights
• Industrial PLCs for expanding digital I/O capacity
• Smart home hubs for interfacing with sensors and actuators
• Server motherboards for managing power sequencing and fault detection

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for PCF8575CDWR. 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

PCF8575CDWR 是德州儀器 (TI) 推出的 16 位 I²C 匯流排 I/O 擴展器，通過雙向 I²C 匯流排（串行時鐘 SCL 和串行數據 SDA）提供通用遠程 I/O 擴展。該器件具有 16 位準雙向輸入/輸出 (I/O) 端口，每個位可獨立配置為輸入或輸出。PCF8575CDWR 的工作電源電壓範圍為 2.3 V 至 5.5 V，適用於多種應用。它採用 24 引腳 SOIC 封裝 (DW)。器件包含一個中斷輸出 (INT)，可連接到微控制器的中斷輸入，無需連續輪詢即可檢測輸入引腳的變化。

詳細技術參數

核心特性

• 16 位遠程 I/O 擴展器，用於 I²C 匯流排
• 準雙向 I/O 引腳 (默認高電平)
• 低待機電流消耗
• 開漏中斷輸出
• I²C 匯流排接口支持標準和快速模式 (最高 400 kHz)
• 三個硬件地址引腳允許同一匯流排上最多 8 個器件
• 工作電源電壓範圍：2.3 V 至 5.5 V
• I/O 引腳可承受 5 V 電壓
• 極性反轉寄存器允許反轉輸入數據
• I/O 引腳無需外部上拉電阻 (內部電流源)

典型應用場景

PCF8575CDWR 適用於需要額外 I/O 線路的系統，特別是 GPIO 有限的場景。具體應用包括：

• 5G 基站控制板，用於監控和控製狀態 LED、風扇和復位信號
• 汽車儀表盤模塊，用於讀取開關輸入和驅動指示燈
• 工業 PLC，用於擴展數字 I/O 容量
• 智能家居網關，用於與傳感器和執行器接口
• 服務器主板，用於管理電源排序和故障檢測

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 PCF8575CDWR 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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HONG KONG JASIN SEMICONDUCTOR TECHNOLOGY COMPANY LIMITED
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