LTC4307

量产

Low Offset Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery

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产品技术资料帮助

ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。
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概述

  • Bidirectional Buffer with Stuck Bus Recovery
  • 60mV Buffer Offset Independent of Load
  • 30ms Stuck Bus Timeout
  • Compatible with Non-Compliant VOL I2C Devices
  • Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane
  • ±5kV Human Body Model ESD Protection
  • Isolates Input SDA and SCL Line from Output
  • Compatible with I2C™, I2C Fast Mode and SMBus
  • READY Open-Drain Output
  • 1V Precharge on All SDA and SCL Lines
  • High Impedance SDA, SCL Pins for VCC = 0V
  • Small 8-Lead (3mm × 3mm) DFN and 8-Lead MSOP Packages

The LTC4307 hot swappable, 2-wire bus buffer allows I/O card insertion into a live backplane without corruption of the data and clock busses. The LTC4307 provides bidirectional buffering, keeping the backplane and card capacitances isolated. Low offset and high VOL tolerance allows multiple devices to be cascaded on the clock and data busses. If SDAOUT or SCLOUT are low for 30ms, the LTC4307 will automatically break the bus connection. At this time the LTC4307 automatically generates up to 16 clock pulses on SCLOUT in an attempt to free the bus. A connection will resume if the stuck bus is cleared.

During insertion, the SDA and SCL lines are pre-charged to 1V to minimize bus disturbances. When driven high, the ENABLE input allows the LTC4307 to connect after a stop bit or bus idle. Driving ENABLE low breaks the connection between SDAIN and SDAOUT, SCLIN and SCLOUT. READY is an open-drain output which indicates that the backplane and card sides are connected.

Applications

  • Live Board Insertion
  • Servers
  • Capacitance Buffer/Bus Extender
  • RAID Systems
  • ATCA
LTC4307
Low Offset Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery
Rising Edge from Asserted Low Product Package 1 Product Package 2
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参考资料

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技术文章 2

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硬件生态系统

部分模型 产品周期 描述
电平转换器和缓冲区 1
LTC4313
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工具及仿真模型

IBIS 模型 1

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