PI3V724ZLEX

Analog Switches - Special Purpose Overview

The PI3V724ZLEX is a 7-channel video multiplexer/demultiplexer designed for switching between multiple VGA sources or endpoints. It supports full VGA signal paths including Red, Green, Blue, Horizontal Sync, Vertical Sync, DDC data, and DDC clock channels. The device features a typical -3dB bandwidth of 1.7GHz, low crosstalk of -38dB typ, and an on-state resistance (Ron) of 4 Ohm typ with flatness of 0.5 ohm typ. It operates on dual power supplies: VDD at 3.0V to 3.6V and VDD5_IN at 4.5V to 5.5V. The component provides ESD tolerance up to +/-4kV contact per IEC61000-4-2 and integrates monitor detection logic with hot plug output signaling. It is housed in a 32-contact TQFN package.

Analog Switches - Special Purpose Feature Summary

• Integrates automatic and manual port switching capabilities with independent monitor detection circuits for each output.
• Generates hot plug output signals to inform the system of monitor connection status without external microcontroller intervention.
• Includes integrated DDC level shifting from 5V to 3.3V and 5V H/V output buffers with high drive capability.
• Provides robust signal integrity through high bandwidth and low insertion loss suitable for long FR4 trace applications.

Analog Switches - Special Purpose Applications

• Notebook docking station video signal routing
• Multi-source VGA display switching systems
• Portable computer external monitor interfaces

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm packaging details such as tape and reel quantities. Ensure that the ZL package code corresponds to the required 32-contact TQFN footprint for PCB layout compatibility. Confirm RoHS compliance status and green material declarations prior to finalizing procurement orders.

Analog Switches - Special Purpose Selection Notes

Select this component when designing VGA signal paths requiring automatic monitor detection and hot plug notification. Ensure the design accommodates dual voltage rails of 3.3V and 5V. Verify that the application supports the required 1.7GHz bandwidth and that the 32-pin TQFN package fits within the available board space constraints.

Analog Switches - Special Purpose Part Context

This device belongs to the Pericom video switch family, now manufactured by Diodes Incorporated. It addresses the need for seamless video source switching in mobile computing environments where analog VGA signals traverse between portable devices and docking stations. The integration of detection logic simplifies system design compared to discrete switching solutions.

Analog Switches - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative 7-channel VGA mux/demux devices only if they match the pinout, voltage requirements, and functional specifications of the PI3V724 series.

Analog Switches - Special Purpose FAQ

How does the PI3V724 detect connected monitors automatically?

In automatic switching mode, the device sends a detection pulse through the Blue signal line every 1.6 seconds to check for termination. Upon detecting a monitor's termination impedance, it automatically switches to that port.

What is the function of the Rref pin?

The Rref pin allows the user to connect an external resistor to ground to define the application scheme (e.g., Case_75//75, Case_150//75, or Case_75), enabling the device to automatically determine the correct monitor configuration.

Can the PI3V724 operate in manual switching mode?

Yes, by setting the Mode Select (MS) pin high, the device enters manual switching mode. In this mode, the Priority/SEL pin determines which output port is active.