LTC4303（具阻塞总线恢复功能的可热插拔型二线式总线缓冲器）-AD代理

LTC4303的基本参数

制造厂商：AD
产品类别：串行总线缓冲器、扩展器和加速度计
技术类目：串行总线缓冲器、扩展器和加速度计
功能描述：具阻塞总线恢复功能的可热插拔型二线式总线缓冲器
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LTC4303的产品详情：

The LTC4303 hot swappable 2-wire Bus Buffer allows I/O card insertion into a live backplane without corruption of the data and clock busses. When a connection is made, the LTC4303 provides bidirectional buffering, keeping the backplane and card capacitances isolated. If SDAOUT or SCLOUT is low for ≥ 30ms (typ), the LTC4303 automatically breaks the data and clock bus connection. At this time the LTC4303 automatically generates up to 16 clock pulses on SCLOUT in an attempt to free the bus. A connection will be enabled automatically when the bus becomes free.

Rise-time accelerator circuitry allows the use of larger pull-up resistors while still meeting rise-time requirements. During insertion, the SDA and SCL lines are precharged to 1V to minimize bus disturbances. When driven high, ENABLE allows the LTC4303 to connect after a stop bit or bus idle occurs. Driving ENABLE low breaks the connection between SDAIN and SDAOUT, SCLIN and SCLOUT. READY is an open drain output that indicates when the backplane and card sides are connected together.

*Patent Pending

应用

Hot Board Insertion
Servers
Capacitance Buffer/Bus Extender
RAID Systems

LTC4303的优势和特点：

Automatic Disconnect of SDA/SCL Lines when Bus is Stuck Low for ≥ 30ms
Recovers Stuck Busses with Automatic Clocking*
Bidirectional Buffer* for SDA and SCL Lines Increases Fanout
Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane
Pin Compatible with LTC4300A-1
±15kV Human Body Model ESD Protection
Isolates Input SDA and SCL Lines from Output
Compatible with I2CTM, I2C Fast-Mode and SMBus Standards (Up to 400kHz Operation)
READY Open Drain Output
1V Precharge on All SDA and SCL Lines
High Impedance SDA, SCL Pins for VCC = 0V
ENABLE Gates Connection from Input to Output
MSOP 8-Pin and DFN (3mm × 3mm) Packages

LTC4303具体的完整产品型号参数及价格（美元）：

LTC4303CDD#PBF，封装：8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)，包装形式及数量：管装，121，工作温度：0 to 70C，AD官网报价：2.89（100-499个）；2.43（1000+个）

LTC4303CDD#TRPBF，封装：8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)，包装形式及数量：卷带，2500，工作温度：0 to 70C，AD官网报价：2.89（100-499个）；2.43（1000+个）

LTC4303CMS8#PBF，封装：8-Lead MSOP，包装形式及数量：管装，50，工作温度：0 to 70C，AD官网报价：2.83（100-499个）；2.38（1000+个）

LTC4303CMS8#TRPBF，封装：8-Lead MSOP，包装形式及数量：卷带，2500，工作温度：0 to 70C，AD官网报价：2.83（100-499个）；2.38（1000+个）

LTC4303IDD#PBF，封装：8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)，包装形式及数量：管装，121，工作温度：-40 to 85C，AD官网报价：3.45（100-499个）；2.9（1000+个）

LTC4303IDD#TRPBF，封装：8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)，包装形式及数量：卷带，2500，工作温度：-40 to 85C，AD官网报价：3.45（100-499个）；2.9（1000+个）

LTC4303IMS8#PBF，封装：8-Lead MSOP，包装形式及数量：管装，50，工作温度：-40 to 85C，AD官网报价：3.38（100-499个）；2.84（1000+个）

LTC4303IMS8#TRPBF，封装：8-Lead MSOP，包装形式及数量：卷带，2500，工作温度：-40 to 85C，AD官网报价：3.38（100-499个）；2.84（1000+个）

LTC4303的评估套件：