DESCRIPTION

The PCA9510 and PCA9511 are hot swappable I2C and SMBus buffers that allows 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 PCA9510 and PCA9511 provides bi-directional buffering, keeping the backplane and card capacitances isolated.

FEATURES

• Bi-directional buffer for SDA and SCL lines increases fanout and prevents SDA and SCL corruption during live board insertion and removal from multi-point backplane systems

• Compatible with I2C standard mode, I2C fast mode, and SMBus standards

• ∆V/∆t rise time accelerators on all SDA and SCL lines (PCA9511 only)

• Rise time accelerator threshold of 0.6 V

• Active high ENABLE input

• Active high READY open-drain output

• High impedance SDA and SCL pins for VCC = 0 V

• 1 V precharge on all SDA and SCL lines (PCA9510 IN only)

• Supports clock stretching and multiple master arbitration/synchronization

• Operating power supply voltage range: 2.7 V to 5.5 V

• 5.5 V tolerant I/Os

• 0 to 400 kHz clock frequency

• ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101

• Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

• Package offer: SO8, TSSOP8 (MSOP8)

APPLICATION

• cPCI, VME, AdvancedTCA cards and other multi-point backplane cards that are required to be inserted or removed from an operating system.