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LTC4308CMS8-PBF Datasheet(PDF) 6 Page - Linear Technology |
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LTC4308CMS8-PBF Datasheet(HTML) 6 Page - Linear Technology |
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6 / 16 page  LTC4308 6 4308f ENABLE (Pin 1): Connection Enable Input. This 0.6V nomi- nal threshold input pin enables or disables the LTC4308. For normal operation, pull or connect ENABLE high. Driving ENABLE below the 0.45V threshold isolates SDAIN from SDAOUT, SCLIN from SCLOUT, asserts READY low, and prohibits automatic clock and stop bit generation during a fault condition. A rising edge on ENABLE after a fault has occurred forces a connection between SDAIN, SDAOUT and SCLIN, SCLOUT. Connect to VCC if unused. SCLOUT (Pin 2): Serial Clock Output. Connect this pin to a SCL bus segment where bus stuck low recovery is desired. A pull-up resistor should be connected between this pin and a bus pull-up supply greater than or equal to VCC. SCLIN (Pin 3): Serial Clock Input. Connect this pin to a SCL bus segment where isolation from bus stuck low issues is desired. A pull-up resistor should be connected between this pin and a bus pull-up supply greater than 0.9V. GND (Pin 4): Device Ground. Connect this pin to a ground plane for best results. READY (Pin 5): Connection Ready Status Output. This open-drain N-channel MOSFET pin pulls low when ENABLE is low, when the startup and connection sequence described in the Operation section has not been completed, or when the LTC4308 disconnects the input and output pins due to a bus stuck low condition. READY goes high when ENABLE is high and connection is made between the input and output pins. Connect a pull-up resistor, typically 10k, from this pin to the bus pull-up supply. This pin can be left open if unused. SDAIN (Pin 6): Serial Data Input. Connect this pin to a SDA bus segment where isolation from bus stuck low issues is desired. A pull-up resistor should be connected between this pin and a bus pull-up supply greater than 0.9V. SDAOUT (Pin 7): Serial Data Output. Connect this pin to a SDA bus segment where bus stuck low recovery is desired. A pull-up resistor should be connected between this pin and a bus pull-up supply greater than or equal to VCC. VCC (Pin 8): Supply Voltage Input. Place a bypass capacitor of at least 0.01μF close to VCC for best results. Exposed Pad (Pin 9, DFN Package Only): Exposed Pad may be left open or connected to device ground. PIN FUNCTIONS |
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