LTC4311 - Low Voltage I2C/SMBus Accelerator
Features
- Improves I2C Bus Rise Time Transition
- Ensures Data Integrity with Multiple Devices on the I2C Bus.
- Wide Supply Voltage Range: 1.6V to 5.5V
- Improves Low State Noise Margin
- Up to 400kHz Operation
- Auto Detect Low Power Standby Mode
- Low (<5μA) Supply Current Shutdown
- Does Not Load Bus When Disabled or Powered Down
- Strong Slew Limited Pull-up Current
- ±8kV Human Body Model ESD Ruggedness
- 2mm x 2mm DFN and SC70 Packages
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC4311 is a dual I2C active pull-up designed to enhance data transmission speed and reliability for bus loading conditions well beyond the 400pF I2C specification limit. The LTC4311 operates at supply voltages from 1.6V to 5.5V and is also compatible with SMBus.The LTC4311 allows multiple device connections or a longer, more capacitive interconnect, without compromising slew rates or bus performance, by using two slew limited pull-up currents.
During positive bus transitions, the LTC4311 provides slew limited pull-up currents to quickly slew the I2C or SMBus lines to the bus pull-up voltage. During negative transitions or steady DC levels, the currents are disabled to improve negative slew rate, and improve low state noise margins. An auto detect standby mode reduces supply current if both SCL and SDA are high. When disabled, the LTC4311 goes into low (<5μA) current shutdown.
The LTC4311 is available in the 2mm x 2mm x 0.75mm DFN, and SC70 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 |
|---|---|---|---|---|---|
| LTC4311CDC#PBF | 2x2 DFN-6 | DC6 | C | 05-08-1703 | Yes |
| LTC4311CDC#TRMPBF | 2x2 DFN-6 | DC6 | C | 05-08-1703 | Yes |
| LTC4311CDC#TRPBF | 2x2 DFN-6 | DC6 | C | 05-08-1703 | Yes |
| LTC4311CSC6#PBF | SC-70 | SC6 | C | 05-08-1638 | Yes |
| LTC4311CSC6#TRMPBF | SC-70 | SC6 | C | 05-08-1638 | Yes |
| LTC4311CSC6#TRPBF | SC-70 | SC6 | C | 05-08-1638 | Yes |
| LTC4311IDC#PBF | 2x2 DFN-6 | DC6 | I | 05-08-1703 | Yes |
| LTC4311IDC#TRMPBF | 2x2 DFN-6 | DC6 | I | 05-08-1703 | Yes |
| LTC4311IDC#TRPBF | 2x2 DFN-6 | DC6 | I | 05-08-1703 | Yes |
| LTC4311ISC6#PBF | SC-70 | SC6 | I | 05-08-1638 | Yes |
| LTC4311ISC6#TRMPBF | SC-70 | SC6 | I | 05-08-1638 | Yes |
| LTC4311ISC6#TRPBF | SC-70 | SC6 | I | 05-08-1638 | 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 | |
|---|---|---|---|---|---|---|
| LTC4311CDC#PBF | 2x2 DFN-6 | C | $2.21 | Yes | ||
| LTC4311CDC#TRMPBF | 2x2 DFN-6 | C | $2.21 | $1.60 | Yes | |
| LTC4311CDC#TRPBF | 2x2 DFN-6 | C | $2.21 | $1.55 | Yes | |
| LTC4311CSC6#PBF | SC-70 | C | $2.21 | Yes | ||
| LTC4311CSC6#TRMPBF | SC-70 | C | $2.21 | $1.60 | Yes | |
| LTC4311CSC6#TRPBF | SC-70 | C | $2.21 | $1.55 | Yes | |
| LTC4311IDC#PBF | 2x2 DFN-6 | I | $2.66 | Yes | ||
| LTC4311IDC#TRMPBF | 2x2 DFN-6 | I | $2.66 | $1.91 | Yes | |
| LTC4311IDC#TRPBF | 2x2 DFN-6 | I | $2.66 | $1.86 | Yes | |
| LTC4311ISC6#PBF | SC-70 | I | $2.66 | Yes | ||
| LTC4311ISC6#TRMPBF | SC-70 | I | $2.66 | $1.91 | Yes | |
| LTC4311ISC6#TRPBF | SC-70 | I | $2.66 | $1.86 | 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.Click here to view our complete list of demo boards
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC4311IDC#PBF | 2x2 DFN-6 | I | $2.66 | Yes | ||
| LTC4311IDC#TRMPBF | 2x2 DFN-6 | I | $2.66 | $1.91 | Yes | |
| LTC4311IDC#TRPBF | 2x2 DFN-6 | I | $2.66 | $1.86 | Yes | |
| LTC4311ISC6#PBF | SC-70 | I | $2.66 | Yes | ||
| LTC4311ISC6#TRMPBF | SC-70 | I | $2.66 | $1.91 | Yes | |
| LTC4311ISC6#TRPBF | SC-70 | I | $2.66 | $1.86 | Yes | |
| Buy Now • Request Samples | ||||||
Applications
- Notebook and Palmtop Computers
- Portable Instruments
- Battery Chargers
- Industrial Controls
- TV/Video Products
- ACPI SMBus Interface
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- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
