PCA9557RGVR TI I2C GPIO Expander | 16-VQFN (4x4) | 8-bit, 1.65-5.5V

Product Overview

The PCA9557RGVR is a low-voltage, 8-bit I²C-bus and SMBus I/O expander from Texas Instruments. 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 with high-current drive capability (up to 25 mA per I/O) and low power consumption. The PCA9557RGVR operates from a supply voltage range of 1.65 V to 5.5 V, making it suitable for a wide variety of applications. It is available in a compact 16-pin VQFN (4x4 mm) package, ideal for space-constrained designs.

Detailed Technical Specifications

Key Features

• 8-bit I²C-bus GPIO expander with interrupt output
• Low standby current consumption (1.5 µA typical)
• Open-drain active-low interrupt output (INT)
• Three hardware address pins (A0, A1, A2) allow up to 8 devices on the same bus
• I²C-bus to parallel port expander
• Power-on reset with all channels set as inputs
• No glitch on power-up
• Supports hot insertion
• Low operating voltage range (1.65 V to 5.5 V)
• 5 V tolerant I/Os
• 400 kHz fast-mode I²C bus
• Package: 16-pin VQFN (4x4 mm)

Target Applications

• 5G base station control and monitoring (e.g., fan control, status LED)
• Automotive dashboard and infotainment systems (e.g., button matrix, backlight control)
• Industrial PLC I/O expansion
• Server and networking equipment (e.g., blade server status indicators)
• Portable and battery-powered devices (e.g., smartphone accessory detection)
• Home automation (e.g., smart thermostat I/O)

Global Supply Chain & Wholesale Solutions

At Jasin Chip, we provide professional supply chain and wholesale solutions for PCA9557RGVR. 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.

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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

PCA9557RGVR 是德州儀器（TI）推出的一款低電壓、8位I²C匯流排和SMBus I/O擴展器。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位准雙向I/O埠，具有高電流驅動能力（每個I/O高達25 mA）和低功耗。PCA9557RGVR 的工作電源電壓範圍為1.65 V至5.5 V，適用於多種應用。它採用緊湊的16引腳VQFN（4x4 mm）封裝，非常適合空間受限的設計。

詳細技術參數

核心特性

• 8位I²C匯流排GPIO擴展器，帶中斷輸出
• 低待機電流消耗（典型值1.5 µA）
• 開漏極低電平有效中斷輸出（INT）
• 三個硬體位址引腳（A0、A1、A2），同一匯流排上最多支援8個器件
• I²C匯流排到並行埠擴展器
• 上電複位，所有通道設置為輸入
• 上電無突波
• 支援熱插入
• 低工作電壓範圍（1.65 V 至 5.5 V）
• 5 V 容限 I/O
• 400 kHz 快速模式 I²C 匯流排
• 封裝：16引腳 VQFN（4x4 mm）

典型應用場景

• 5G基站控制與監控（例如風扇控制、狀態指示燈）
• 汽車儀錶盤和資訊娛樂系統（例如按鍵矩陣、背光控制）
• 工業PLC I/O擴展
• 伺服器和網路設備（例如刀片伺服器狀態指示燈）
• 可擕式和電池供電設備（例如智慧手機配件檢測）
• 家庭自動化（例如智慧恒溫器I/O）

環球供應鏈與批發合作夥伴方案

在 Jasin Chip，我們為 PCA9557RGVR 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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