NXP Semiconductors PCA9541A
The PCA9541A 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. The failed master is isolated from the system and does not affect communication between the on-line master and the slave devices on the downstream I2C-bus.| Part No. | PCA9541A |
|---|---|
| Datasheet | PCA9541A Download |
| Manufacturer |  NXP Semiconductors |
| Description | 2-to-1 I2C-bus master selector |
| Buy | Stock & Price |
FEATURES AND BENEFITS
● 2-to-1 bidirectional master selector● I2C-bus interface logic; compatible with SMBus standards
● PCA9541A/01 powers up with Channel 0 selected
● PCA9541A/03 powers up with no channel selected and either master can take control of the bus
● Active LOW interrupt input
● 2 active LOW interrupt outputs
● Active LOW reset input
● 4 address pins allowing up to 16 devices on the I2C-bus
● Channel selection via I2C-bus
● Bus initialization/recovery function
● Bus traffic sensor
● Low Ron 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
● Software identical for both masters
● Low standby current
● Operating power supply voltage range of 2.3 V to 5.5 V
● 6.0 V tolerant inputs
● 0 Hz to 400 kHz clock frequency
● ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
● Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
● Packages offered: SO16, TSSOP16, HVQFN16 3.
