DG542AP

Analog Switches - Special Purpose Overview

The DG542AP is a high-performance monolithic wideband/video switch manufactured by Vishay Siliconix. It features four SPDT channels utilizing a proprietary 'T' switch configuration to achieve low crosstalk and high off-isolation. The device operates within a supply voltage range of -3 V to +15 V (V+ to V-) and supports an analog signal range from -5 V to +5 V. Key electrical parameters include a maximum on-resistance of 100 Ω, a bandwidth of 500 MHz, and turn-on/turn-off times up to 160 ns at full temperature range. It is housed in a 16-pin sidebraze DIP package with an extended operating temperature range of -55 °C to +125 °C.

Analog Switches - Special Purpose Feature Summary

• SPDT Configuration: Four independent single-pole double-throw switches allow flexible signal routing.
• T-Switch Architecture: Proprietary internal design ensures exceptionally low crosstalk and high off-isolation for RF and video signals.
• Bidirectional Conductance: Source and drain terminals are interchangeable, facilitating simplified circuit layout.
• Logic Compatibility: Built-in regulation maintains TTL input compatibility across the entire operating supply voltage range.

Analog Switches - Special Purpose Applications

• RF and Video Switching
• RGB Signal Routing
• Video Multiplexing
• Fast Data Acquisition Systems

Analog Switches - Special Purpose Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot traceability and adherence to MIL-STD-1835 specifications if required for military applications. Inspect packaging integrity to prevent moisture damage. Ensure ordering suffixes match specific package and temperature requirements.

Analog Switches - Special Purpose Selection Notes

Select the DG542AP when bidirectional switching and low insertion loss are critical. Compare against DG541DJ for SPST configurations requiring lower on-resistance. Verify that the 100 Ω maximum on-resistance meets system attenuation limits. Ensure the 16-pin sidebraze package fits the PCB footprint constraints.

Analog Switches - Special Purpose Part Context

The DG542AP belongs to the DG540/DG541/DG542 family of wideband switches. While the DG540 offers enhanced isolation via extra ground pins and the DG541 provides SPST channels, the DG542 specifically implements SPDT logic where channels operate in complementary pairs. All variants share the same D/CMOS process technology.

Analog Switches - Special Purpose Replacement Considerations

Public confirmed substitute part numbers: DG542AP/883, 5962-91555201MEA.

Analog Switches - Special Purpose FAQ

How does the DG542AP handle signal directionality?

The DG542AP conducts equally well in both directions when on, allowing the source and drain terminals to be interchangeable for easier board layout.

What is the logic control behavior of the DG542AP?

Channels 1 and 2 are active when Logic SW 1 is ON, while Channels 3 and 4 are active when Logic SW 2 is ON. A Logic '0' turns the respective channel pair OFF.

What is the typical off-isolation performance?

At 5 MHz with a 75 Ω load, the DG542AP typically achieves an off-isolation of -75 dB.