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LTC4303CMS8PBF Datasheet(PDF) 1 Page - Linear Dimensions Semiconductor |
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LTC4303CMS8PBF Datasheet(HTML) 1 Page - Linear Dimensions Semiconductor |
1 / 12 page LTC4303 1 4303fb FEATURES DESCRIPTIO TYPICAL APPLICATIO APPLICATIO S 10k 10k 5V BACK_SCL BACKPLANE CONNECTOR CARD BACK_SDA 3.3V 3.3V 100k ENABLE CARD_SCL CARD_SDA SCLOUT SCLIN SDAOUT SDAIN GND VCC LTC4303 READY 0.01 mF 4303 TA01 10k 10k STAGGERED CONNECTOR , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6356140, 6650174, 7032051. Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery The LTC®4303 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 resistance 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. ■ 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 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 8-Pin and DFN (3mm × 3mm) Packages ■ Hot Board Insertion ■ Servers ■ Capacitance Buffer/Bus Extender ■ RAID Systems Stuck Bus Resolved with Automatic Clocking SDAOUT 5V/DIV 200 ms/DIV STUCK LOW > 30ms AUTOMATIC CLOCKING DISCONNECT AT TIMEOUT RECOVERS 4303 TA01b SDAIN 5V/DIV SCLOUT 5V/DIV |
Similar Part No. - LTC4303CMS8PBF |
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Similar Description - LTC4303CMS8PBF |
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