TCA4311ADGKR Semiconductors - ICs by Texas Instruments

HOT SWAPPABLE I2C BUS BUFFER VSSOP-8

Status: Unknown
Series: -
RoHS: Unknown
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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.

Prices starting from US$0.65


Distributor Starting From Stock
Logo for Texas Instruments Texas Instruments US$0.65
8,092
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Logo for Newark Electronics Newark Electronics US$2.34
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Logo for element14 element14 US$2.48
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Specifications

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
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

Alternative Descriptions

2-bit bidirectional 2.7- to 5.5-V hot swappable 400-kHz I2C/SMBus buffer | Texas Instruments
Hot Swappable I2C Bus Buffer, Vssop-8 | Newark Electronics


Frequently Asked Questions

Where can I find additional details, specifications and documents for a TCA4311ADGKR?

Additional datasheets, footprints and schematics for TCA4311ADGKR are listed on our Part Details page. You can also find images and similar parts to TCA4311ADGKR on this page.

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What category does TCA4311ADGKR fall under?

The TCA4311ADGKR is listed under Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs.

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Is the TCA4311ADGKR RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Texas Instruments, Newark Electronics, element14 and Farnell have stock available or on a lead time for TCA4311ADGKR.

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