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PCA9540BD

Analog Multiplexer, 2:1, 1 Circuit, 31 ohm, 20 µA, 2.3V to 5.5V, SOIC-8

NXP PCA9540BD

Image is for illustrative purposes only. Please refer to product description.

Manufacturer:
NXP NXP
Manufacturer Part No:
PCA9540BD
Order Code:
2212115
Technical Datasheet:
PCA9540BD   Datasheet
See all Technical Docs

Product Overview

The PCA9540BD is a 2-channel I²C-bus Multiplexer controlled via the I²C-bus. The SCL/SDA upstream pair fans out to two SCx/SDx downstream pairs or channels. Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register. A power-on reset function puts the registers in their default state and initializes the I²C-bus state machine with no channels selected. The pass gates of the multiplexer are constructed such that the VDD pin can be used to limit the maximum high voltage that is passed by the multiplexer. This allows the use of different bus voltages on each SCx/SDx pair, so that 1.8/2.5/3.3V parts can communicate with 5V parts without any additional protection. External pull-up resistors can pull the bus up to the desired voltage level for this channel. All I/O pins are 5V tolerant.
  • Channel selection via I²C bus
  • Low RON switches
  • No glitch on power-up
  • Supports hot insertion
  • Low standby current

Applications

Industrial

Product Information

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:
2:1

:
1Circuits

:
31ohm

:
2.3V to 5.5V

:
SOIC

:
8Pins

:
-40°C

:
85°C

:
-

:
-

:
MSL 1 - Unlimited
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Technical Docs (4)

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