PCA9546AZQNR

Part: PCA9546A from Texas Instruments

Type: I2C Switch/Multiplexer

Key Specs:

• Operating Power-Supply Voltage Range: 2.3 V to 5.5 V
• I2C Bus Clock Frequency: 0 to 400-kHz
• Number of Channels: 4
• Input Tolerance: 5.5-V
• ESD Protection (Human-Body Model): 2000-V
• ESD Protection (Machine Model): 200-V
• ESD Protection (Charged-Device Model): 1000-V
• Latch-Up Performance: Exceeds 100 mA

Features:

• 1-of-4 Bidirectional Translating Switches
• Supports Hot Insertion
• I2C Bus and SMBus Compatible
• Low Standby Current
• Three Address Pins, Allowing up to Eight Devices on the I2C Bus
• 5.5-V Tolerant Inputs
• Channel Selection Via I2C Bus
• Allows Voltage-Level Translation Between 1.8-V, 2.5-V, 3.3-V, and 5-V Buses
• No Glitch on Power Up
• Active-Low Reset Input
• Power Up With All Switch Channels Deselected
• Low RON Switches
• ESD Protection Exceeds JESD 22
• Latch-Up Performance Exceeds 100 mA Per JESD 78

Applications:

• null

Package:

• QFN – RGV
• QFN – RGY
• SOIC – DW
• TSSOP – PW
• TVSOP – DGV

• •1-of-4 Bidirectional Translating Switches • Supports Hot Insertion
• • I ²C Bus and SMBus Compatible • Low Standby Current
• •
• • Three Address Pins, Allowing up to Eight 2.3 ^V to 5.5 ^V Devices on the I ²C Bus • 5.5-V Tolerant Inputs
• •Channel Selection Via I
• •Deselected JESD 78
• •
• • Allows Voltage-Level Translation Between – 2000-V Human-Body Model (A114-A) 1.8-V, 2.5-V, 3.3-V, and 5-V Buses –
• •No Glitch on Power Up –

• Active-Low Reset Input Operating Power-Supply Voltage Range of

  • ²C Bus 0 to 400-kHz Clock Frequency
• Power Up With All Switch Channels Latch-Up Performance Exceeds 100 mA Per

• Low ^RON Switches ESD Protection Exceeds JESD ²²

  • 200-V Machine Model (A115-A)
  • 1000-V Charged-Device Model (C101)

over recommended operating free-air temperature range (unless otherwise noted)

(2) The power-on reset circuit resets the ^I2C bus logic with ^VCC ^< ^VPOR. ^VCC must be lowered to 0.2 ^V to reset the device.

(3) ^Cio(ON) depends on internal capacitance and external capacitance added to the SCn lines when channels(s) are ON.

SCPS148A–OCTOBER 2005–REVISED DECEMBER 2005

over operating free-air temperature range (unless otherwise noted)

(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.

(3) The package thermal impedance is calculated in accordance with JESD 51-7.

SCPS148A–OCTOBER 2005–REVISED DECEMBER 2005

Figure 12 shows an application in which the PCA9546A can be used.

A. Pin numbers shown are for the DGV, DW, PW, and RGY packages.

Figure 12. Typical Application

www.ti.com 13-Feb-2006