LTC4303

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 LiveBoard Insertion and Removal from Backplane Pin Compatible with LTC...

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SeekIC No. : 004402560 Detail

LTC4303: 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 ...

floor Price/Ceiling Price

Part Number:
LTC4303
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/21

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Product Details

Description



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 LiveBoard 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



Application

Hot Board Insertion
Servers
Capacitance Buffer/Bus Extender
RAID Systems



Pinout

  Connection Diagram


Specifications

VCC to GND ..........................................0.3V to 7V
SDAIN, SCLIN, SDAOUT, SCLOUT,
READY, ENABLE .....................................0.3V to 7V
Operating Temperature
LTC4303C .............................................. 0 to 70
LTC4303I ............................................40 to 85
SDAIN, SCLIN, SDAOUT, SCLOUT, READY
(Note 3) ..........................................................30mA
Storage Temperature Range
MSOP ................................................65 to 150
DFN ...................................................65 to 125
Lead Temperature (Soldering, 10sec)
MSOP .............................................................. 300



Description

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 pullup 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.




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