LTC4301LIMS8#PBF

LTC4301LIMS8#PBF is a hot-swappable, 2-wire bus buffer. It allows I/O card insertion into a live backplane without corruption of the data and clock busses. In addition, the LTC4301L SDAIN and SCLIN pins are compatible with systems with pull-up voltages as low as 1V. Control circuitry prevents the backplane from being connected to the card until a stop bit or a bus idle is present. When the connection is made, this device provides bidirectional buffering. When driven low, the active-low CS input pin allows the part to connect after a stop bit or bus idle occurs. Driving CS high breaks the connection between SCLIN and SCLOUT and between SDAIN and SDAOUT. A logic high on READY indicates that the backplane and card sides are connected together. It is used in applications such as hot board insertion, servers, capacitance buffer/bus extender, desktop computers.

• Level translates 1V signals to standard 3.3V and 5V logic rails
• Bidirectional buffer for SDA and SCL lines increases fanout
• Isolates input SDA and SCL line from output, 10kV human body model ESD protection
• Supports clock stretching, arbitration and synchronization
• High impedance SDA, SCL pins for VCC = 0V, CS gates connection from input to output
• Supply current is 4.5mA typical at (VCC = 5.5V, VSDAIN = VSCLIN = 0V)
• Positive supply voltage range from 2.7V to 5.5V
• I²C maximum operating frequency is 600KHz typical at (TA = 25°C, VCC = 2.7V to 5.5V)
• Input leakage current is ±5µA maximum at (TA = 25°C, VCC = 2.7V to 5.5V)
• Operating temperature range from -40°C to 85°C, 8-lead plastic MSOP package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party