PCF8574N TI I2C I/O Expander | 16-PDIP | 8-bit, 2.5V-6V

Product Overview

The PCF8574N 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 I/O can be used as input or output without the use of control signals. The PCF8574N operates from 2.5 V to 6 V and is available in a 16-pin PDIP package.

Detailed Technical Specifications

Key Features

• 8-bit remote I/O expander for I2C-bus
• Quasi-bidirectional I/O pins (no direction control needed)
• High-current drive capability (25 mA sink, 10 mA source)
• Low standby current consumption
• Open-drain interrupt output (INT) active low
• Three hardware address pins (A0, A1, A2) allow up to 8 devices on the same bus
• I2C-bus interface with Schmitt-trigger inputs
• ESD protection exceeds 2 kV HBM

Target Applications

• 5G base station: monitoring and controlling power supply modules, fan speeds, and status LEDs
• Automotive dashboard: reading switch inputs (e.g., buttons, knobs) and driving indicator LEDs
• Industrial PLC: expanding digital I/O for sensor inputs and actuator outputs
• Smart home: controlling relays and reading sensor states in IoT gateways
• Medical devices: managing user interface buttons and display backlight control

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for PCF8574N. 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

PCF8574N 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），包括帶鎖存功能的輸出，具有高電流驅動能力，可直接驅動 LED。每個 I/O 無需控制信號即可用作輸入或輸出。PCF8574N 的工作電壓範圍為 2.5 V 至 6 V，採用 16 引腳 PDIP 封裝。

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 引腳（無需方向控制）
• 高電流驅動能力（25 mA 灌電流，10 mA 拉電流）
• 低待機電流消耗
• 開漏中斷輸出 (INT) 低電平有效
• 三個硬體位址引腳 (A0, A1, A2) 允許同一匯流排上最多 8 個器件
• 帶施密特觸發器輸入的 I2C 匯流排介面
• ESD 保護超過 2 kV HBM

典型應用場景

• 5G 基站：監控和控制電源模組、風扇轉速及狀態 LED
• 汽車儀表板：讀取開關輸入（如按鈕、旋鈕）並驅動指示燈
• 工業 PLC：擴展數位 I/O 用於感測器輸入和執行器輸出
• 智慧家居：在 IoT 閘道中控制繼電器並讀取感測器狀態
• 醫療設備：管理使用者介面按鈕和顯示背光控制

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 PCF8574N 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]