NXP | PCA9513ADP,118

The PCA9513A and PCA9514A are hot swappable I2C-bus and SMBus buffers that allow I/O card insertion into a live backplane without corrupting the data and clock buses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. When the connection is made, the PCA9513A and PCA9514A provides bidirectional buffering, keeping the backplane and card capacitances isolated.

Features:

• Bidirectional buffer for SDA and SCL lines increases fan-out and prevents SDA and SCL corruption during live board insertion and removal from multipoint backplane systems
• Compatible with I2C-bus Standard mode, I2C-bus Fast mode, and SMBus standards
• Built-in DV/Dt rise time accelerators on all SDA and SCL lines (0.8 V threshold) requires the bus pull-up voltage and supply voltage (VCC) to be the same
• Rise time accelerator threshold moved from 0.6 V to 0.8 V for improved noise margin
• Active HIGH ENABLE input
• Active HIGH READY open-drain output
• High-impedance SDAn and SCLn pins for VCC = 0 V