PCA9512

INTEGRATED CIRCUITS PCA9512 Level shifting hot swappable I2C and SMBus buffer Product data sheet 2004 Oct 05 Philips Semiconductors Philips Semiconductors Product data sheet Level shifting hot swappable I2C and SMBus buffer PCA9512 DESCRIPTION The PCA9512 is a hot swappable I2C and SMBus buffer that allows I/O card insertion into a live backplane without corruption of the data and clock buses and includes two dedicated supply voltage pins to provide level shifting between 3.3 V and 5 V systems while maintaining the best noise margin for each voltage level. Either pin may be powered with supply voltages ranging from 2.7 V to 5.5 V with no constraints on which supply voltage is higher. Control circuitry prevents the backplane from being connected to the card until a stop bit or bus idle occurs on the backplane without bus contention on the card. When the connection is made, the PCA9512 provides bi-directional buffering, keeping the backplane and card capacitances isolated. The dynamic offset design of the PCA9510/11/12/13/14 I/O drivers allow them to be connected to another PCA9510/11/12/13/14 device in series or in parallel and to the A side of the PCA9517. The PCA9510/11/12/13/14 can not connect to the static offset I/Os used on the PCA9515/15A/16/16A/17 B side and PCA9518. PIN CONFIGURATION TOP VIEW VCC2 1 SCLOUT SCLIN GND 2 3 4 8 7 6 5 VCC SDAOUT SDAIN ACC FEATURES Bi-directional buffer for SDA and SCL lines increases fanout and Compatible with I2C standard mo...