LTC4312
Pin-Selectable, 2-Channel,
2-Wire Multiplexer
with Bus Buffers
DESCRIPTION FEATURES n The LTC®4312 is a hot-swappable 2-channel 2-wire bus
multiplexer that allows one upstream bus to connect to
any combination of downstream busses or channels.
An individual enable pin controls each connection. The
LTC4312 provides bidirectional buffering, keeping the upstream bus capacitance isolated from the downstream bus
capacitances. The high noise margin allows the LTC4312
to be interoperable with I2C devices that drive a high VOL
(> 0.4V). The LTC4312 supports level translation between
1.5V, 1.8V, 2.5V, 3.3V and 5V busses. The hot-swappable
nature of the LTC4312 allows I/O card insertion into, and
removal from, a live backplane without corruption of the
data and clock busses. 1:2 Multiplexer/Switch for 2-Wire Bus
Bidirectional Buffer for SDA and SCL Lines
High Noise Margin with VIL = 0.3•VCC
ENABLE Pins Connect SDA and SCL Lines
Selectable Rise Time Accelerator Current and
Activation Voltage
Level Shift 1.5V, 1.8V, 2.5V, 3.3V and 5V Busses
Prevents SDA and SCL Corruption During Live Board …