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Details for TCA4311ADGKR by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs
TCA4311ADGKR image

TCA4311ADGKR by Texas Instruments

1-V Precharge on all SDA and SCL Lines Prevents Corruption During Live Board Insertion and Removal From Backplane
Accommodates Standard Mode and Fast Mode I2 C Devices
Applications Include Hot Board Insertion and Bus Extension
ESD Protection Exceeds JESD 22
Improved Noise Immunity
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
Low ICC Chip Disable of < 1 u03bcA
Open-Drain I2 C Pins
Operating Power-Supply Voltage Range of 2.7 V to 5.5 V
Powered-Off High-Impedance I2 C Pins
READY Open-Drain Output
SDA and SCL Input Lines are Isolated From Outputs
SDA and SCL Lines are Buffered Which Increases Fanout
Supports Bidirectional Data Transfer of I2 C Bus Signals
Supports Clock Stretching, Arbitration, and Synchronization
Part Information
TCA4311ADGKR image
RoHS Compliant
The TCA4311A 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 pre-charged to 1 V to minimize the current required to charge the parasitic capacitance of the chip. When the I2C bus is idle, the TCA4311A can be put into shutdown mode by setting the EN pin low. When EN is high, the TCA4311A 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 TCA4311A has standard open-drain I/Os. The size of the pull-up resistors to the I/Os depends on the system, but each side of this buffer must have a pull-up 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.
IC Interface Type:
Interface Applications:
Servers Routers Base Stations Industrial Automation
Supply Voltage Min:
Supply Voltage Max:
Interface Case Style:
No. of Pins:
Operating Temperature Min:
Operating Temperature Max:
Product Range:
Automotive Qualification Standard:
MSL 1 - Unlimited
No SVHC (27-Jun-2018)
RoHS Phthalates Compliant:
Alternate Descriptions
HOT SWAPPABLE I2C BUS BUFFER, VSSOP-8; IC Interface Type:I2C; Interface Applications:Servers, Routers, Base Stations, Industrial Automation; Supply Voltage Min:2.7V; Supply Voltage Max:5.5V; Interface Case Style:VSSOP RoHS Compliant: Yes Newark Electronics
Hot Swap Controller 1-CH 5.5V 8-Pin VSSOP T/R Avnet America
Hot Swap Controller 1-CH 5.5V 8-Pin VSSOP T/R Avnet Europe