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PCA9546A

Features: 1-of-4 bi-directional translating switches I2C-bus interface logic; compatible with SMBus standards ActiveLOW reset input 3 address pins allowing up to 8 devices on the I2C-bus Channel selection via I2C-bus, in any combination Power-up with all switch channels deselected Low Ronswitches...

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SeekIC No. : 004456304 Detail

PCA9546A: Features: 1-of-4 bi-directional translating switches I2C-bus interface logic; compatible with SMBus standards ActiveLOW reset input 3 address pins allowing up to 8 devices on the I2C-bus Channel se...

PCA9546A Data Sheet

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Part Number:
PCA9546A
Supply Ability:
5000

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  • 1~5000
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  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

 1-of-4 bi-directional translating switches
  I2C-bus interface logic; compatible with SMBus standards
  ActiveLOW reset input
  3 address pins allowing up to 8 devices on the I2C-bus
  Channel selection via I2C-bus, in any combination
 Power-up with all switch channels deselected
 Low Ron switches
 Allows voltage level translation between 1.8V, 2.5V, 3.3V and 5V buses
  No glitch on power-up
 Supports hot insertion
 Low stand-by current
 Operating power supply voltage range of 2.3V to 5.5V
 5V tolerant Inputs
  0kHz to 400kHz clock frequency
  ESD protection exceeds 2000V HBM per JESD22-A114, 200V MM per
 JESD22-A115, and 1000V CDM per JESD22-C101
 Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100mA
 Three packages offered: SO16, TSSOP16, and HVQFN16


Pinout

Connection Diagram


Description

The PCA9546A is a quad bi-directional translating switch controlled via the I2C-bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register.

Anactive LOW reset inpu tallows the PCA9546A to recover from as ituation where one of t he down streamI2C-buse sisstuck in a LOW state.Pull ing heRESET pin LOW resets the I2C-bus state machine and causes all the channels to be deselected as does the internal Power-OnReset (POR) function.

The pass gates of the switches are constructed suchth at theVDDpin canbe used to limit the maximum highvoltage which will be passed by the PCA9546A.This allows the use of different bus voltages one achpair,soth at1.8V or 2.5V or3.3V parts cancommuni cate with 5V 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 5V tolerant.




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