LTC4303
Info: : PRODUCTION
searchIcon
cartIcon

LTC4303

Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery

Show More showmore-icon

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $2.55
Features
  • Automatic Disconnect of SDA/SCL Lines when Bus is Stuck Low for ≥ 30ms
  • 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
  • Pin Compatible with LTC4300A-1
  • ±15kV Human Body Model ESD Protection
  • Isolates Input SDA and SCL Lines from Output
  • Compatible with I2C, 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 8-Pin and DFN (3mm × 3mm) Packages
Additional Details
show more Icon
The LTC4303 hot swappable 2-wire Bus Buffer allows I/O card insertion into a live backplane without corruption of the data and clock busses. When a connection is made, the LTC4303 provides bidirectional buffering, keeping the backplane and card capacitances isolated. If SDAOUT or SCLOUT is low for ≥ 30ms (typ), the LTC4303 automatically breaks the data and clock bus connection. At this time the LTC4303 automatically generates up to 16 clock pulses on SCLOUT in an attempt to free the bus. A connection will be enabled automatically when the bus becomes free.

Rise-time accelerator circuitry allows the use of larger pull-up resistors while still meeting rise-time requirements. During insertion, the SDA and SCL lines are precharged to 1V to minimize bus disturbances. When driven high, ENABLE allows the LTC4303 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.

Applications

  • Hot Board Insertion
  • Servers
  • Capacitance Buffer/Bus Extender
  • RAID Systems
Part Models 8
1ku List Price Starting From $2.55

close icon
Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4303CDD#PBF
  • HTML
  • HTML
LTC4303CDD#TRPBF
  • HTML
  • HTML
LTC4303CMS8#PBF
  • HTML
  • HTML
LTC4303CMS8#TRPBF
  • HTML
  • HTML
LTC4303IDD#PBF
  • HTML
  • HTML
LTC4303IDD#TRPBF
  • HTML
  • HTML
LTC4303IMS8#PBF
  • HTML
  • HTML
LTC4303IMS8#TRPBF
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Feb 3, 2020

- 20_0128

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LTC4303CMS8#PBF

PRODUCTION

LTC4303CMS8#TRPBF

PRODUCTION

LTC4303IMS8#PBF

PRODUCTION

LTC4303IMS8#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Feb 3, 2020

- 20_0128

arrow down

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LTC4303CMS8#PBF

PRODUCTION

LTC4303CMS8#TRPBF

PRODUCTION

LTC4303IMS8#PBF

PRODUCTION

LTC4303IMS8#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Tools & Simulations

Tools & Simulations 1

Recently Viewed