Two-wire bus multiplexers

  • 04-Jan-2011 03:50 EST

Linear Technology’s LTC4312 and LTC4314 two-wire bus multiplexers provide individual enable pins to connect an upstream I2C bus to any combination of downstream busses or cards. The pin-selectable multiplexers with bus buffers reduce component count while promoting ideal I2C signal integrity. The LTC4312 multiplexes two channels, while the LTC4314 multiplexes four channels. These devices allow easy address expansion, providing the ability to address one of multiple identical devices, thus resolving address-conflict issues. Bidirectional capacitive buffering allows extension of the bus size beyond the 400-pF I2C bus specification and prevents signal corruption during live board insertion or removal. Applications include radial architectures in telecommunications systems such as ATCA, address expansion, and level translators.

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