Features and Benefits
- 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
The LTC4306 is a 4-channel, 2-wire bus multiplexer with bus buffers to provide capacitive isolation between the upstream bus and downstream buses. Through software control, the LTC4306 connects the upstream 2-wire bus to any desired combination of downstream buses. Each channel can be pulled up to a supply voltage ranging from 2.2V to 5.5V, independent of the LTC4306 supply voltage.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.
- Nested Addressing
- 5V/3.3V Level Translator
- Capacitance Buffer/Bus Extender
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
The EVAL-LTC4306-PMDZ features LTC4306, a 4-channel, 2-wire I2C bus and SMBus compatible multiplexer having bus buffers that provide capacitive isolation between the upstream bus and downstream buses. This evaluation board provides 6-pin PMOD connectors for upstream and downstream connection for compatibility with PMOD form factors such as EVAL-ADICUP3029, an Arduino based Wireless Development Platform for Internet of Things applications based on an ultra-low power ARM Cortex-M3 processor.
Pmod™ is the Digilent defined standard of Peripheral Modules, small I/O interface boards that offer an ideal way to extend the capabilities of programmable logic and microcontroller boards. They allow sensitive signal conditioning circuits and high-power drive circuits to be placed where they are most effective — near sensors and actuators.
EVAL-LTC4306-PMDZ comes with PMOD connectors on both upstream and downstream side for compatibility with PMOD form factors, 10K pull up resistors on upstream and all downstream buses and 0.1uF bypass capacitor on the upstream side. The user has the option to add 6 pin 2.54mm pitch pin header for connection to the GPIOs (General Purpose Input/Output pins) on EVAL-LTC4306-PMDZ for extra functionality. The user also has the option to add test points on different places on the board for fault monitoring and place additional bypass capacitors (0805 size footprint) on the upstream and the downstream side for defense against any unwanted noise in their system for adequate bypassing on power supply lines.
Features & Benefits
- Features LTC4306, a 4-channel, 2-wire I2C bus and SMBus compatible multiplexer having bus buffers that provide capacitive isolation between the upstream bus and downstream buses
- 6-pin PMOD connectors for upstream and downstream connection for compatibility with PMOD form factors such as EVAL-ADICUP3029 (Arduino based Wireless Development Platform based on an ultra-low power ARM Cortex-M3 processor) or with EVAL-SDP-CK1Z (SDP-K1 Cortex ARM core processors Controller Board and color sensor)
Documentation & Resources
R410 Reliability Data3/22/2018
LTC4306 Companion Parts
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LTC4306CGN#PBF||Material Declaration||Reliability Data||24-Lead SSOP (Narrow 0.15 Inch)|
|LTC4306CGN#TRPBF||Material Declaration||Reliability Data||24-Lead SSOP (Narrow 0.15 Inch)|
|LTC4306CUFD#PBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)|
|LTC4306CUFD#TRPBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)|
|LTC4306IGN#PBF||Material Declaration||Reliability Data||24-Lead SSOP (Narrow 0.15 Inch)|
|LTC4306IGN#TRPBF||Material Declaration||Reliability Data||24-Lead SSOP (Narrow 0.15 Inch)|
|LTC4306IUFD#PBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)|
|LTC4306IUFD#TRPBF||Material Declaration||Reliability Data||24-Lead QFN (4mm x 5mm x 0.75mm w/ EP)|
|Wafer Fabrication Data||R410 Reliability Data|
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Sample & Buy
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Buy Now Pricing
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.