TCA9543A

Slaves A , A ...A

0

1

N

Slaves B , B ...B

0

1

N

I2C or SMBus

Master

(e.g. Processor)

SDA

SCL

INT

SD0

SC0

INT0

Channel 0

Channel 1

RESET

SD1

SC1

INT1

VCC

A0

A1

GND

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Folder

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TCA9543A

SCPS206A – MARCH 2014 – REVISED FEBRUARY 2015

1 Features

2 Applications

1

•

1-of-2 Bidirectional Translating Switches

•

Servers

•

•

Routers (Telecom Switching Equipment)

•

Two Active-Low Interrupt Inputs

•

Factory Automation

•

Active-Low Interrupt Output

•

Multiple, Identical Temp Sensors)

•

Active-Low Reset Input

•

Two Address Pins Allowing up to Four TCA9543A

3 Description

The TCA9543A is a dual bidirectional translating

•

Combination

upstream pair fans out to two downstream pairs, or

•

Power-up With All Switch Channels Deselected

channels. Either individual SCn/SDn channel or both

channels

can

be

selected,

determined

by

the

•

contents of the programmable control register. Two

•

Allows Voltage-Level Translation Between

interrupt inputs (INT1–INT0), one for each of the

1.8-V, 2.5-V, 3.3-V, and 5-V Buses

downstream pairs, are provided. One interrupt output

•

No Glitch on Power-up

(INT) acts as an AND of the two interrupt inputs.

•

Supports Hot Insertion

An

active-low

reset

(RESET)

input

allows

the

•

Low Standby Current

TCA9543A to recover from a situation where one of

•

Operating Power-Supply Voltage Range of 1.65-V

to 5.5-V

causes both of the channels to be deselected, as

•

5.5-V Tolerant Inputs

does the internal power-on reset function.

•

0 to 400-kHz Clock Frequency

The pass gates of the switches are constructed such

•

Latch-Up Performance Exceeds 100-mA Per

that the VCC terminal can be used to limit the

JESD78

maximum high voltage, which will be passed by the

•

ESD Protection Exceeds JESD 22

TCA9543A. This allows the use of different bus

voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V

–

4000-V Human-Body Model (A114-A)

parts can communicate with 5-V parts without any

–

1500-V Charged-Device Model (C101)

additional protection. External pull-up resistors pull

the bus up to the desired voltage level for each

channel. All I/O terminals are 5.5-V tolerant.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TSSOP (14)

5.00 mm × 4.40 mm

TCA9543A

SOIC (14)

8.65 mm × 3.91 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

4 Simplified Application Diagram

1

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.