LTC4306 - 4-Channel, 2-Wire Bus Multiplexer with Capacitance Buffering
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
Description
The LTC®4306 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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC4306CGN#PBF | SSOP-24 | GN | C | 05-08-1641 (GN24) | Yes |
| LTC4306CGN#TRPBF | SSOP-24 | GN | C | 05-08-1641 (GN24) | Yes |
| LTC4306CUFD#PBF | 4x5 QFN-24 | UFD | C | 05-08-1696 | Yes |
| LTC4306CUFD#TRPBF | 4x5 QFN-24 | UFD | C | 05-08-1696 | Yes |
| LTC4306IGN#PBF | SSOP-24 | GN | I | 05-08-1641 (GN24) | Yes |
| LTC4306IGN#TRPBF | SSOP-24 | GN | I | 05-08-1641 (GN24) | Yes |
| LTC4306IUFD#PBF | 4x5 QFN-24 | UFD | I | 05-08-1696 | Yes |
| LTC4306IUFD#TRPBF | 4x5 QFN-24 | UFD | I | 05-08-1696 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC4306CGN#PBF | SSOP-24 | C | $5.00 | $3.50 | Yes | |
| LTC4306CGN#TRPBF | SSOP-24 | C | $3.56 | Yes | ||
| LTC4306CUFD#PBF | 4x5 QFN-24 | C | $5.07 | $3.55 | Yes | |
| LTC4306CUFD#TRPBF | 4x5 QFN-24 | C | $3.61 | Yes | ||
| LTC4306IGN#PBF | SSOP-24 | I | $6.00 | $4.20 | Yes | |
| LTC4306IGN#TRPBF | SSOP-24 | I | $4.26 | Yes | ||
| LTC4306IUFD#PBF | 4x5 QFN-24 | I | $6.07 | $4.25 | Yes | |
| LTC4306IUFD#TRPBF | 4x5 QFN-24 | I | $4.31 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC906A | LTC4306 4-ch I2C Mux | $50.00 | |
| Buy Now | |||
Applications
- Nested Addressing
- 5V/3.3V Level Translator
- Capacitance Buffer/Bus Extender
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Design Tools
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- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
