Description:The ISL54225 is a single supply dual 2:1 multiplexer that can operate from a single 2.7V to 5.25V supply. It contains two Single Pole/Double Throw (SPDT) switches configured as a DPDT. The part was designed for switching or routing of USB High-Speed signals and/or USB Full-Speed signals in portable battery-powered products. The 6.5Ω switches were specifically designed to pass USB High-Speed/Full-Speed data signals. They have high bandwidth and low capacitance to pass USB High-Speed data signals with minimal
The recommended PCB layout for the ISL54225IRTZ involves keeping the analog and digital grounds separate, using a solid ground plane, and placing the device close to the signal sources. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and to minimize the length of the signal traces.
The ISL54225IRTZ requires a single 1.8V to 3.6V power supply. It's recommended to use a low-dropout linear regulator (LDO) or a switching regulator with a low output voltage ripple to power the device. The power sequencing requirements involve powering up the VCC pin before the EN pin, and ensuring that the VCC pin is stable before enabling the device.
The ISL54225IRTZ can support data rates up to 100Mbps. To ensure signal integrity, it's recommended to use a 50Ω transmission line, keep the signal traces short, and use a common mode filter or a ferrite bead to reduce electromagnetic interference (EMI).
The ISL54225IRTZ can be configured for different switch configurations by connecting the NC pins to the desired signal lines. For example, to configure the device as an SPDT switch, connect NC1 to the signal line and NC2 to GND. For an SP3T switch, connect NC1 to signal line 1, NC2 to signal line 2, and NC3 to signal line 3.
The ISL54225IRTZ has built-in ESD protection diodes on the signal pins, which can withstand up to ±8kV of ESD voltage. To prevent latch-up, it's recommended to use a series resistor on the signal lines and to ensure that the device is powered up and down slowly to prevent voltage spikes.
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ISL54225IRTZ Overview
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