PCF8574AN TI I2C I/O Expander | 16-PDIP | 8-bit, 2.5-6V

Product Overview

The PCF8574AN 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) with high-current drive capability (25 mA sink current per pin). The PCF8574AN operates from a 2.5 V to 6 V supply and is available in a 16-pin PDIP package. Three hardware address pins (A0, A1, A2) allow up to eight devices on the same I2C bus, providing up to 64 additional I/O lines. The device includes an interrupt output (INT) that can be connected to the microcontroller's interrupt input, enabling efficient event-driven I/O handling.

Detailed Technical Specifications

Key Features

• 8-bit remote I/O expander for I2C-bus
• Quasi-bidirectional I/O ports with high sink current (25 mA)
• Three hardware address pins allow up to eight devices on the bus
• Interrupt output (INT) for event-driven I/O
• Low standby current consumption (1 µA typical)
• Wide operating voltage range (2.5 V to 6 V)
• I2C-bus interface supports Standard (100 kHz) and Fast (400 kHz) modes
• Compatible with most microcontrollers and processors
• Available in 16-pin PDIP package for easy prototyping and through-hole assembly

Target Applications

• 5G base station control and monitoring (e.g., fan speed control, status LED indication)
• Automotive dashboard switch and indicator input/output expansion
• Industrial PLC I/O expansion for sensor and actuator interfaces
• Home automation systems (e.g., smart lighting control, thermostat keypad)
• Medical equipment (e.g., patient monitoring panel buttons and alarms)
• Consumer electronics (e.g., TV front panel buttons, set-top box I/O)

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for PCF8574AN. 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

PCF8574AN 是德州儀器 (TI) 推出的遠端 8 位 I/O 擴展器，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），每個引腳具有高電流驅動能力（25 mA 灌電流）。PCF8574AN 的工作電壓範圍為 2.5 V 至 6 V，採用 16 引腳 PDIP 封裝。三個硬體位址引腳（A0、A1、A2）允許在同一 I2C 匯流排上最多連接八個器件，從而提供多達 64 個額外 I/O 線。該器件包含一個中斷輸出 (INT)，可連接到微控制器的中斷輸入，實現高效的基於事件的 I/O 處理。

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
• 準雙向 I/O 埠，具有高灌電流能力（25 mA）
• 三個硬體位址引腳，允許匯流排上最多八個器件
• 中斷輸出 (INT)，用於基於事件的 I/O
• 低待機電流消耗（典型值 1 µA）
• 寬工作電壓範圍（2.5 V 至 6 V）
• I2C 匯流排介面支援標準（100 kHz）和快速（400 kHz）模式
• 與大多數微控制器和處理器相容
• 採用 16 引腳 PDIP 封裝，便於原型設計和通孔組裝

典型應用場景

• 5G 基站控制與監控（例如風扇速度控制、狀態 LED 指示）
• 汽車儀錶板開關和指示燈輸入/輸出擴展
• 工業 PLC I/O 擴展，用於感測器和執行器介面
• 家庭自動化系統（例如智慧照明控制、恒溫器鍵盤）
• 醫療設備（例如患者監護面板按鈕和警報）
• 消費電子產品（例如電視前面板按鈕、機上盒 I/O）

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 PCF8574AN 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]