DS2409数据手册集成电路（IC）的专用规格书PDF

描述 Description

The MicroLAN coupler is an essential component to build and control 1-Wire® networks with multi-level branching. In contrast to approaches that switch the ground line, the coupler maintains a common ground level for the whole network and keeps the inactive segments powered. This simplifies supplying central or local power for additional circuitry and prevents loss of status of parasitically powered devices. It also avoids disrupting communication caused by the parasitic power supply of 1-Wire devices after activating a branch. Both the main and the auxiliary 1-Wire output are supported by a smart-on command. This command generates a reset/presence sequence on the selected output before the electronic switch closes the contact to the 1-Wire bus. This way the bus master can apply a ROM function command (optionally followed by a memory function) to the devices on the just activated segment with all other devices in the network remaining deselected. This significantly speeds up the analysis of topology and population in a continuously changing network. The coupler also supports the bus master in detecting arrivals on the inactive segments of the network by responding to the conditional search command.

特性 Features

• Low impedance coupler to create large common-ground, multi-level 1-Wire networks
• Keeps inactive branches pulled high to 5V
• Simplifies network topology analysis by logically decoupling devices on active network segments
• Conditional search for fast-event signaling
• Auxiliary 1-Wire line to connect a memory chip or to be used as digital input
• Programmable, general-purpose open-drain control output
• Communicates at 16.3kbps
• Unique, factory-lasered and tested 64-bit registration number assures absolute traceability because no two parts are alike
• Built-in multidrop controller ensures compatibility with other 1-Wire products
• Operating temperature range from -40°C to +85°C
• Compact, low-cost 6-pin TSOC surface mount package

简介

DS2409属于集成电路（IC）的专用。由制造生产的DS2409专用该系列产品可提供所需的功能，用以将信息源/信宿连到各种复杂或范围狭窄应用中的传感器、变送器、致动器、传输介质或其他此类端点。例如，汽车安全气囊驱动器、车身控制和信息娱乐总线、自适应电缆均衡器、智能卡等等。