| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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7,898 pcs
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7898 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The PCA9541BS/03,118 from NXP Semiconductors is a 2-to-1 I2C-bus master selector, engineered for high-reliability dual-master applications. This specialized interface IC allows for system operation even if one master fails or is removed for maintenance. It connects two masters on separate I2C-buses to the same downstream slave devices, enabling selection of one master at a time via I2C commands.
Key electrical specifications include a wide operating voltage range of 2.3V to 3.6V and 4.5V to 5.5V, with an I2C interface. The device features interrupt outputs to indicate master control and supports bus recovery/initialization sequences. An internal bus sensor can detect traffic and generate interrupts during channel switches.
The PCA9541BS/03,118 is supplied in a 16-HVQFN (4x4) package and is designed for surface mount applications. The package is available on tape and reel. This component is suitable for applications requiring robust I2C communication management and master failover capabilities.
| Qty | Low | High |
|---|---|---|
| 1+ | $6.39 | $6.39 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The voltage supply range is 2.3V to 3.6V and 4.5V to 5.5V.
The interface is I2C.
It is used as a 2-Channel I2C Multiplexer.
It is supplied in a 16-HVQFN (4x4) package and a 16-VQFN Exposed Pad package.
It is designed for surface mount.
The PCA9541 is a 2-to-1 I2C-bus master selector designed for high reliability dual master I2C-bus applications where system operation is required, even when one master fails or the controller card is removed for maintenance. The two masters (for example, primary and back-up) are located on separate I2C-buses that connect to the same downstream I2C-bus slave devices. I2C-bus commands are sent by either I2C-bus master and are used to select one master at a time. Either master at any time can gain control of the slave devices if the other master is disabled or removed from the system. The failed master is isolated from the system and will not affect communication between the on-line master and the slave devices on the downstream I2C-bus.
Yes, bus recovery/initialization sends nine clock pulses, a not acknowledge, and a STOP condition to set downstream I2C-bus devices to an initialized state before switching the channel to the selected master.