PCA9544ARGYR

Specialized Overview

The PCA9544ARGYR is a quad bidirectional translating switch manufactured by Texas Instruments, designed for I2C and SMBus systems. It operates within a supply voltage range of 2.3 V to 5.5 V and supports a maximum power dissipation of 400 mW. The device features four switches with a maximum on-resistance of 45 ohms and a maximum supply current of 12 uA. It functions reliably across an operating temperature range from -40°C to +85°C. The component is housed in a VQFN-20 surface-mount package.

Specialized Feature Summary

• Provides one-of-four channel selection for upstream I2C/SMBus signals
• Supports bidirectional signal translation between different voltage domains
• Includes active-low interrupt inputs and output for system monitoring

Specialized Applications

• I2C bus extension in mixed-voltage environments
• SMBus system architecture requiring signal isolation
• Embedded systems utilizing multiple slave devices on shared buses

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure compliance with RoHS directives and check humidity sensitivity levels prior to storage and handling procedures.

Specialized Selection Notes

Select this component when a single upstream I2C or SMBus pair must be routed to exactly one of four downstream channels simultaneously. It is suitable for applications requiring low standby current and bidirectional level shifting capabilities within the specified voltage range.

Specialized Part Context

This part belongs to the PCA9544A series of bidirectional translating switches. It shares functional similarities with the PCA9545A but differs in channel control logic, allowing only one channel to be active at a time rather than multiple simultaneous selections.

Specialized Replacement Considerations

The PCA9545ARGYR is a related variant within the same family. Verify if multi-channel activation is required, as the PCA9545A allows any combination of channels to be selected, unlike the single-channel limitation of the PCA9544A.