PCA9544A

Name: PCA9544A
Brand: TI
SKU: PCA9544A
Price: 0.886 USD

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4-Kanal, 2,3- bis 5,5-V I2C/SMBus-Multiplexer mit Interrupt und Spannungsumsetzung

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Datenblatt

document-pdfAcrobat PCA9544A Low Voltage 4-Channel I2C and SMBus Multiplexer With Interrupt Logic datasheet (Rev. G) (Englisch) PDF | HTML

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TCA9544A

AKTIV

4-Kanal, 1,65- bis 5,5-V I2C/SMBus-Multiplexer mit Interrupt und Spannungsumsetzung Performance enhancements for power-on reset and lower voltage operation.

PCA9544A

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Addresses

8

Supply voltage (max) (V)

5.5

Supply voltage (min) (V)

2.3

Features

Interrupt 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)

2.3

Features

Interrupt pin

Rating

Catalog

Frequency (max) (MHz)

0.4

Operating temperature range (°C)

-40 to 85

Number of channels

4

SOIC (DW)

20

131.84 mm² 12.8 x 10.3

TSSOP (PW)

20

41.6 mm² 6.5 x 6.4

TVSOP (DGV)

20

32 mm² 5 x 6.4

VQFN (RGY)

20

15.75 mm² 4.5 x 3.5

1-of-4 Bidirectional translating switches
I²C Bus and SMBus compatible
Four active-low interrupt inputs
Active-low interrupt output
Three address pins, allowing up to eight devices on the I²C Bus
Channel selection via I²C Bus
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 2.3 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
- 2000-V Human-body model (A114-A)
- 200-V Machine model (A115-A)
- 1000-V Charged-device model (C101)

1-of-4 Bidirectional translating switches
I²C Bus and SMBus compatible
Four active-low interrupt inputs
Active-low interrupt output
Three address pins, allowing up to eight devices on the I²C Bus
Channel selection via I²C Bus
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 2.3 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
- 2000-V Human-body model (A114-A)
- 200-V Machine model (A115-A)
- 1000-V Charged-device model (C101)

The PCA9544A is a 4-channel, bidirectional translating multiplexer controlled via the I²C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. One SCL/SDA pair can be selected at a time, and this is 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 output ( INT) acts as an AND of the four interrupt inputs.

A power-on reset function puts the registers in their default state and initializes the I²C state machine, with no channel selected.

The pass gates of the switches are constructed such that the V_CC pin can be used to limit the maximum high voltage, which will be passed by the PCA9544A. 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-V tolerant.

The PCA9544A is a 4-channel, bidirectional translating multiplexer controlled via the I²C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. One SCL/SDA pair can be selected at a time, and this is 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 output ( INT) acts as an AND of the four interrupt inputs.

A power-on reset function puts the registers in their default state and initializes the I²C state machine, with no channel selected.

The pass gates of the switches are constructed such that the V_CC pin can be used to limit the maximum high voltage, which will be passed by the PCA9544A. 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-V tolerant.

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Alle anzeigen 12

	Typ	Titel		Datum
*	Data sheet	PCA9544A Low Voltage 4-Channel I2C and SMBus Multiplexer With Interrupt Logic datasheet (Rev. G)	PDF \| HTML	11 Mär 2021
	Application note	I2C Solutions for Hot Swap Applications (Rev. A)		31 Jan 2023
	Application note	I2C Dynamic Addressing		25 Apr 2019
	Selection guide	Logic Guide (Rev. AB)		12 Jun 2017
	Application note	Choosing the Correct I2C Device for New Designs	PDF \| HTML	07 Sep 2016
	Application note	Understanding and Interpreting Standard-Logic Data Sheets (Rev. C)		02 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
	Application note	Troubleshooting I2C Bus Protocol		19 Okt 2009
	Application note	Programming Fun Lights With TI's TCA6507		30 Nov 2007
	Application note	Semiconductor Packing Material Electrostatic Discharge (ESD) Protection		08 Jul 2004

Design und Entwicklung

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Gehäuse	Pins	Herunterladen
SOIC (DW)	20	Optionen anzeigen
TSSOP (PW)	20	Optionen anzeigen
TVSOP (DGV)	20	Optionen anzeigen
VQFN (RGY)	20	Optionen anzeigen

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PCA9544A

4-Kanal, 2,3- bis 5,5-V I2C/SMBus-Multiplexer mit Interrupt und Spannungsumsetzung

Eine neuere Version dieses Produkts ist verfügbar

Drop-In-Ersatz mit verbesserter Funktionalität im Gegensatz zum verglichenen Baustein

PCA9544A

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PCA9544A IBIS Model

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