LTC4300-1IMS8#PBF

LTC4300-1 is a hot swappable 2-wire bus buffer. It allow I/O card insertion into a live backplane without corruption of the data and clock busses. When the connection is made, this device provides bidirectional buffering, keeping the backplane and card capacitances isolated. Rise time accelerator circuitry allows the use of weaker DC pull-up currents while still meeting rise time requirements. During insertion, the SDA and SCL lines are precharged to 1V to minimize bus disturbances. This device incorporates a CMOS threshold digital ENABLE input pin, which forces the part into a low current mode when driven to ground and sets normal operation when driven to VCC. It also includes an open drain READY output pin, which indicates that the backplane and card sides are connected together. It is widely used in application such as hot board insertion, servers, capacitance buffer/bus extender, desktop computer etc.

• Isolates input SDA and SCL lines from output
• Low ICC chip disable is 1µA
• READY open-drain output
• 1V precharge on all SDA and SCL lines
• Supports clock stretching, arbitration and synchronization
• High impedance SDA, SCL pins for VCC = 0V
• Positive supply voltage is 2.7V to 5.5V
• Supply current is 2.8mA typical at (VCC = 5.5V, VSDAIN = VSCLIN = 0V)
• Operating temperature is -40°C to 85°C
• Package style is 8-lead plastic MSOP

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