LTC4306 - 4-Channel, 2-Wire Bus Multiplexer with Capacitance Buffering

The downstream channels are also provided with ALERT1-ALERT4 inputs for fault reporting. Programmable timeout circuitry disconnects the downstream buses if the bus is stuck low. When activated, rise time accelerators source currents into the 2-wire bus pins to reduce rise time. Driving the ENABLE pin low restores all features to their default states. Three address pins provide 27 distinct addresses.

The LTC4306 is available in 24-lead QFN (4mm × 5mm) and SSOP packages.

Features

1:4 2-Wire Multiplexer/Switch
Connect SDA and SCL Lines with 2-Wire Bus Commands
Supply Independent Bidirectional Buffer for SDA and SCL Lines Increases Fan-Out
Programmable Disconnect from Stuck Bus
Compatible with I2C and SMBus Standards
Rise Time Accelerator Circuitry
SMBus Compatible ALERT Response Protocol
Two General Purpose Inputs-Outputs
Prevents SDA and SCL Corruption During Live Board
Insertion and Removal from Backplane
±10kV Human Body Model ESD Ruggedness
24-Lead QFN (4mm × 5mm) and SSOP Packages

Typical Application

Applications

Nested Addressing
5V/3.3V Level Translator
Capacitance Buffer/Bus Extender

Packaging

**Order Information**
Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC4306CGN#PBF	SSOP-24	C	$5.00	$3.50
LTC4306CGN#TRPBF	SSOP-24	C		$3.56
LTC4306CUFD#PBF	4x5 QFN-24	C	$5.07	$3.55
LTC4306CUFD#TRPBF	4x5 QFN-24	C		$3.61
LTC4306IGN#PBF	SSOP-24	I	$6.00	$4.20
LTC4306IGN#TRPBF	SSOP-24	I		$4.26
LTC4306IUFD#PBF	4x5 QFN-24	I	$6.07	$4.25
LTC4306IUFD#TRPBF	4x5 QFN-24	I		$4.31