TCA9546A

Name: TCA9546A
Brand: TI
SKU: TCA9546A
Price: 0.375 USD

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4-Kanal, 1,65- bis 5,5-V-I2C/SMBus-Schalter mit Reset und Spannungsumsetzung

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Datenblatt

document-pdfAcrobat TCA9546A Low Voltage 4-Channel I2C and SMBus Switch with Reset Function datasheet (Rev. B) (Englisch) PDF | HTML

TCA9546A

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Datenblatt

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Produktdetails

Addresses

8

Supply voltage (max) (V)

5.5

Supply voltage (min) (V)

1.65

Features

Reset pin

Rating

Catalog

Frequency (max) (MHz)

0.4

Operating temperature range (°C)

-40 to 85

Number of channels

4

Addresses

8

Supply voltage (max) (V)

5.5

Supply voltage (min) (V)

1.65

Features

Reset pin

Rating

Catalog

Frequency (max) (MHz)

0.4

Operating temperature range (°C)

-40 to 85

Number of channels

4

SOIC (D)

16

59.4 mm² 9.9 x 6

TSSOP (PW)

16

32 mm² 5 x 6.4

1-of-4 Bidirectional translating switches
I²C Bus and SMBus compatible
Active-low reset input
Three address pins, allowing up to eight TCA9546A devices on the I²C bus
Channel selection via I²C Bus, in any combination
Power-up with all switch channels deselected
Low R_ON switches
Allows voltage-level translation between
1.8-V, 2.5-V, 3.3-V, and 5-V buses
No glitch on power-up
Supports hot insertion
Low standby current
Operating power-supply voltage range of 1.65 V to 5.5 V
5.5 V Tolerant inputs
0 to 400-kHz Clock frequency
Latch-up performance exceeds 100 mA Per JESD 78
ESD Protection exceeds JESD 22
- 4000-V Human-body model (A114-A)
- 1500-V Charged-device model (C101)

1-of-4 Bidirectional translating switches
I²C Bus and SMBus compatible
Active-low reset input
Three address pins, allowing up to eight TCA9546A devices on the I²C bus
Channel selection via I²C Bus, in any combination
Power-up with all switch channels deselected
Low R_ON switches
Allows voltage-level translation between
1.8-V, 2.5-V, 3.3-V, and 5-V buses
No glitch on power-up
Supports hot insertion
Low standby current
Operating power-supply voltage range of 1.65 V to 5.5 V
5.5 V Tolerant inputs
0 to 400-kHz Clock frequency
Latch-up performance exceeds 100 mA Per JESD 78
ESD Protection exceeds JESD 22
- 4000-V Human-body model (A114-A)
- 1500-V Charged-device model (C101)

The TCA9546A 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.

An active-low reset (RESET) input allows the TCA9546A 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 pin can be used to limit the maximum high voltage, which will be passed by the TCA9546A. 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 pins are 5.5-V tolerant.

The TCA9546A 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.

An active-low reset (RESET) input allows the TCA9546A 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 pin can be used to limit the maximum high voltage, which will be passed by the TCA9546A. 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 pins are 5.5-V tolerant.

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	Typ	Titel		Datum
*	Data sheet	TCA9546A Low Voltage 4-Channel I2C and SMBus Switch with Reset Function datasheet (Rev. B)	PDF \| HTML	29 Okt 2019
	Application brief	Best Practices: I2C Devices on an I3C Shared Bus	PDF \| HTML	30 Mär 2023
	Application note	I2C Solutions for Hot Swap Applications (Rev. A)		31 Jan 2023
	Application note	I2C Dynamic Addressing		25 Apr 2019
	Application note	Choosing the Correct I2C Device for New Designs	PDF \| HTML	07 Sep 2016
	Selection guide	I2C Infographic Flyer		03 Dez 2015
	Application note	Understanding the I2C Bus	PDF \| HTML	30 Jun 2015
	Application note	Maximum Clock Frequency of I2C Bus Using Repeaters		15 Mai 2015
	Application note	I2C Bus Pull-Up Resistor Calculation	PDF \| HTML	13 Feb 2015

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Gehäuse	Pins	CAD-Symbole, Footprints und 3D-Modelle
SOIC (D)	16	Ultra Librarian
TSSOP (PW)	16	Ultra Librarian

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TCA9546A

4-Kanal, 1,65- bis 5,5-V-I2C/SMBus-Schalter mit Reset und Spannungsumsetzung

TCA9546A

Produktdetails

Technische Dokumentation

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TCA9548AEVM — Evaluierungsmodul für bidirektionalen Umsetzer von TCA9548A I2C 1 auf 8

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