TCA9545APWR - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

TCA9545APWR
Manufacturer

TI
ChipWorker Part#

CW27248604
Category

Logic Controller, Logic IC
Package

TSSOP-20
Description

4Channel I2C and SMBus Switch With Interrupt Logic and Reset Functions 20-TSSOP -40℃ to 85℃
Documentation

Datasheet

TCA9545APWR Global Supplier

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TCA9545APWR Specifications

Attribute	Attribute Value

Part Number	TCA9545APWR
Manufacturer	TI
ChipWorker Part#	CW27248604
Category	Logic Controller, Logic IC
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	20 Pin
Case/Package	TSSOP-20
Number of Bits	1 Bit
Propagation Delay Max (tpd)	1.00 ns
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
Power Dissipation (Max)	400 mW
Supply Voltage	1.65V ~ 5.5V
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Operating Temperature	-40℃ ~ 85℃
Product Lifecycle Status	Active
Packaging	Tape & Reel (TR)
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
ECCN Code	EAR99

Product Description

The TCA9545A is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. Four interrupt inputs (INT3–INT0), one for each of the downstream pairs, are provided. One interrupt (INT) output acts as an AND of the four interrupt inputs.
An active-low reset (RESET) input allows the TCA9545A to recover from a situation in which one of the downstream I2C buses is stuck in a low state. Pulling RESET low resets the I2C state machine and causes all the channels to be deselected, as does the internal power-on reset function.
The pass gates of the switches are constructed such that the VCC terminal can be used to limit the maximum high voltage, which will be passed by the TCA9545A. This allows the use of different bus voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts, without any 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.

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