LTC4304 - Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery

During insertion, the SDA and SCL lines are precharged to 1V to minimize bus disturbances. When driven high, ENABLE allows the LTC4304 to connect after a stop bit or bus idle occurs. Driving ENABLE low breaks the connection between SDAIN and SDAOUT, SCLIN and SCLOUT. READY is an open drain output that indicates when the backplane and card sides are connected together.

Features
  • Automatic Disconnect of SDA/SCL Lines when Bus is Stuck Low for ≥30ms
  • Fault Flag for Stuck Bus
  • Recovers Stuck Busses with Automatic Clocking*
  • Bidirectional Buffer* for SDA and SCL Lines Increases Fanout
  • Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane
  • Allows Bus Pullup Voltages Above and Below VCC
  • ±15kV Human Body Model ESD Protection
  • Isolates Input SDA and SCL Lines from Output
  • Compatible with I2CTM, I2C Fast-Mode and SMBus Standards (Up to 400kHz Operation)
  • READY Open Drain Output
  • 1V Precharge on All SDA and SCL Lines
  • High Impedance SDA, SCL Pins for VCC = 0V
  • ENABLE Gates Connection from Input to Output
  • MSOP 10-Pin and DFN (3mm × 3mm) Packages
Typical Application
LTC4304 Typical Application
LTC4304 Typical Application
Applications
  • Hot Board Insertion
  • Servers
  • Capacitance Buffer/Bus Extender
  • RAID Systems
Packaging
LTC4304 Package Drawing
LTC4304 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC4304CDD#PBF3x3 DFN-10C$3.21$2.25
LTC4304CDD#TRPBF3x3 DFN-10C$2.31
LTC4304CMS#PBFMS-10C$3.14$2.20
LTC4304CMS#TRPBFMS-10C$2.26
LTC4304IDD#PBF3x3 DFN-10I$3.86$2.70
LTC4304IDD#TRPBF3x3 DFN-10I$2.76
LTC4304IMS#PBFMS-10I$3.77$2.64
LTC4304IMS#TRPBFMS-10I$2.70
Datasheet
Reliability Data
Product Selector Card
LT Journal
Press Release
Software and Simulation
CAD Symbol
Related Products
LTC4304 - Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery
LTC4303/LTC4304 - 可恢复阻塞总线的 I2C/SMBus 缓冲器
R410 Reliability Data
I2C Muxes, Address Translators, Buffers & Accelerators
I2C Quick Guide
Mar 2006 I2C Bus Buffer Resolves Stuck Buses, Eliminates Heavy Load Limitations and Provides Level Translation
I2C/SMBus Buffers Recover Stuck Bus
LTC4304 IBIS Model
LTC4304 Footprints and Symbols