1 Features

signals

• Operating power-supply voltage range of 2.3 V to

5.5 V

-40 °C to 125 °C

• Stuck bus recovery featuring automatic bus

recovery

• 1-V Precharge on all SDA and SCL lines prevents

corruption during live insertion

devices

• Supports clock stretching, arbitration and

synchronization

2 Applications

• Servers

• Enterprise Switching

• Telecom switching equipment

• Base stations

• Industrial automation equipment

3 Description

supports I/O card insertion into a live backplane

without corruption of the data and clock lines. Control

until a stop command or bus idle condition 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 device.

The TCA4307 has stuck bus recovery, which

automatically disconnects the bus if it detects either

SDAOUT or SCLOUT are low for about 40 ms. Once

the bus is disconnected, the device automatically

generates up to 16 pulses on SCLOUT to attempt to

reset the device which is holding the bus low.

shutdown mode by setting the EN pin low, reducing

power consumption. When EN is pulled high, the

TCA4307 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.

Device Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

TCA4307

VSSOP (8)

3.00 mm × 3.00 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

GND

READY

ENABLE

SDAIN

SCLIN

SDAOUT

SCLOUT

VCC

1

6

3

8

2

7

5

4

Simplified Schematic

www.ti.com

TCA4307

SCPS270 – AUGUST 2020

Copyright © 2020 Texas Instruments Incorporated

Submit Document Feedback

1

Product Folder Links: TCA4307

TCA4307

SCPS270 – AUGUST 2020

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.