Texas Instruments PCA9544A
The PCA9544A is a 4-channel, bidirectional translating multiplexer controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels.| Part No. | PCA9544A |
|---|---|
| Datasheet | PCA9544A Download |
| Manufacturer |  Texas Instruments |
| Description | Low Voltage 4-Channel I2C and SMBus Multiplexer |
| Buy | Stock & Price |
FEATURES
●1 1-of-4 Bidirectional translating switches● I2C Bus and SMBus compatible
● Four active-low interrupt inputs
● Active-low interrupt output
● Three address pins, allowing up to eight devices on the I2C Bus
● Channel selection via I2C Bus
● Power up with all switch 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
● 5.5-V Tolerant inputs
● 0 to 400-kHz Clock frequency
● Latch-up performance exceeds 100 mA Per JESD 78
● ESD Protection exceeds JESD 22 – 2000-V Human-body model (A114-A) – 200-V Machine model (A115-A) – 1000-V Charged-device model (C101) 2
APPLICATIONS
● Servers● Routers (Telecom Switching Equipment)
● Factory Automation
● Products With I2C Slave Address Conflicts (For Example, Multiple, Identical Temp Sensors) 3
DESCRIPTION
One SCL/SDA pair can be selected at a time, and this is determined by the contents of the programmable control register.
