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Details for TCA4311D by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs
IC HOT SWAP I2C BUS BUFF 8-SOIC
TCA4311D image

TCA4311D by Texas Instruments

IC HOT SWAP I2C BUS BUFF 8-SOIC
Part Information
TCA4311D image
RoHS Compliant
Description
The TCA4311 is a hot swappable I2C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock busses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. When the connection is made, this device provides bidirectional buffering, keeping the backplane and card capacitances isolated. During insertion, the SDA and SCL lines are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip. When the I2C bus is idle, the TCA4311 can be put into shutdown mode by setting the EN pin low. When EN is high, the TCA4311 resumes normal operation. It also includes an open drain READY output pin, which indicates that the backplane and card sides are connected together. When READY is high, the SDAIN and SCLIN are connected to SDAOUT and SCLOUT. When the two sides are disconnected, READY is low. Both the backplane and card may be powered with supply voltages ranging from 2.7 V to 5.5 V, with no restrictions on which supply voltage is higher. The TCA4311 has standard open-drain I/Os. The size of the pullup resistors to the I/Os depends on the system, but each side of this buffer must have a pullup resistor. The device is designed to work with Standard Mode and Fast Mode I2C devices in addition to SMBus devices. Standard Mode I2C devices only specify 3 mA in a generic I2C system where Standard Mode devices and multiple masters are possible. Under certain conditions, high termination currents can be used.
Specifications
IC Interface Type:
I2C
Interface Applications:
Hot Board Insertion Bus Extension
Supply Voltage Min:
2.7V
Supply Voltage Max:
5.5V
Interface Case Style:
SOIC
No. of Pins:
8Pins
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (27-Jun-2018)
RoHS Phthalates Compliant:
Yes
Operating Temperature Range:
-40°C to +85°C
Supply Voltage Range:
2.7V to 5.5V
Termination Type:
Surface Mount Device
Alternate Descriptions
Hot Swap Controller 5.5V 8-Pin SOIC Tube Avnet America
Hot Swap Controller 5.5V 8-Pin SOIC Tube Avnet Europe