LTC4311 - Low Voltage I2C/SMBus Accelerator

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.

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
Typical Application
LTC4311 Typical Application
LTC4311 Typical Application
Applications
  • Notebook and Palmtop Computers
  • Portable Instruments
  • Battery Chargers
  • Industrial Controls
  • TV/Video Products
  • ACPI SMBus Interface
Packaging
LTC4311 Package Drawing
LTC4311 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC4311CDC#PBF2x2 DFN-6C$2.21
LTC4311CDC#TRMPBF2x2 DFN-6C$2.21$1.60
LTC4311CDC#TRPBF2x2 DFN-6C$2.21$1.55
LTC4311CSC6#PBFSC-70C$2.21
LTC4311CSC6#TRMPBFSC-70C$2.21$1.60
LTC4311CSC6#TRPBFSC-70C$2.21$1.55
LTC4311IDC#PBF2x2 DFN-6I$2.66
LTC4311IDC#TRMPBF2x2 DFN-6I$2.66$1.91
LTC4311IDC#TRPBF2x2 DFN-6I$2.66$1.86
LTC4311ISC6#PBFSC-70I$2.66
LTC4311ISC6#TRMPBFSC-70I$2.66$1.91
LTC4311ISC6#TRPBFSC-70I$2.66$1.86
Datasheet
Reliability Data
Product Selector Card
LT Journal
Press Release
CAD Symbol
Related Products
LTC4311 - Low Voltage I2C/SMBus Accelerator
LTC4311 - 400kHz 上升时间加速器改善了重负载 I2C/SMBus 系统可靠性
R527 Reliability Data
I2C Muxes, Address Translators, Buffers & Accelerators
I2C Quick Guide
Mar 2008 - Increase I2C or SMBus Data Rate and Reduce Power Consumption with Low Power Bus Accelerator
400kHz Rise Time Accelerator Improves Heavily Loaded I2C/SMBus System Reliability
LTC4311 Footprints and Symbols