General description
The PCA9521 is a monolithic bipolar integrated circuit for bus buffering in applications including I2C-bus, SMBus, PMBus, and other systems based on similar principles.

FEATUREs and benefits
■ Dual, bidirectional unity gain buffer
■ Fast switching times allow operation in excess of 1 MHz
■ Supports I2C-bus (Standard-mode and Fast-mode), SMBus (standard and high power
    mode), PMBus and IPMB
■ Enable allows bus segments to be disconnected
■ Low standby current when not enabled
■ Application/removal of power to IC will not interfere with other bus activity
■ 6 mA (static) pull-down capability supports a wide range of bus standards
■ Low noise susceptibility
■ Low input-output offset voltage
■ Threshold and offset parameters allow the connection of several devices in series
■ Bus levels independent of supply voltage
■ Operating voltages from 2.7 V to 5.5 V
■ Wide range of bus voltages from 1.8 V to 10 V
■ Level shifting between different bus voltages
■ Achieves superior response times without the need for rise time accelerators
■ ESD protection exceeds 2 kV HBM per JESD22-A114 and 500 V CDM per
    JESD22-C101
■ Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

APPLICATIONs
■ Power management systems
■ Telecommunications systems including ATCA
■ Desktop and portable computers including RAID
■ Building automation
■ TV/projector/monitor interconnection
■ Game consoles/boxes
■ CompactPCI
■ Medical systems
■ Gaming machine networks
■ Backplane management/interconnect