Datasheet Details
| Part number | PCA9540B |
|---|---|
| Manufacturer | NXP Semiconductors |
| File Size | 346.64 KB |
| Description | 2-channel I2C-bus multiplexer |
| Datasheet |
 PCA9540B Datasheet
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General Description
The PCA9540B is a 1-of-2 bidirectional translating 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.
Key Features
- 1-of-2 bidirectional translating multiplexer.
- I2C-bus interface logic; compatible with SMBus standards.
- Channel selection via I2C-bus.
- Power-up with all multiplexer channels deselected.
- 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.
- Low standby current.
- Operating power supply voltage range of 2.3 V to 5.5 V.
- 5 V tolerant inputs.
- 0 Hz to 400 kH.