LT6555CGN#PBF

Analog Switches - Special Purpose Overview

The LT6555CGN#PBF is a high-speed triple 2:1 video multiplexer manufactured by Analog Devices Inc. in a 24-lead SSOP package. It features an internally fixed gain of 2 and is optimized for driving double-terminated 75Ω video loads. The device provides a –3dB small-signal bandwidth of 650MHz, a large-signal bandwidth of 450MHz at 2V P-P, and a slew rate of 2200V/µs. It operates on dual supplies ranging from ±2.25V to ±6V or a single supply from 4.5V to 12V. Each amplifier draws 9mA with dual 5V supplies, achieving 72dB channel separation at 10MHz.

Analog Switches - Special Purpose Feature Summary

• Triple 2:1 video multiplexing architecture with internal fixed gain of 2
• Optimized performance for double-terminated 75Ω video loads
• Separate power supply pins for each amplifier to boost channel isolation
• Low supply current consumption with high-impedance outputs when disabled

Analog Switches - Special Purpose Applications

• RGB amplifiers
• UXGA video multiplexing
• LCD projectors

Analog Switches - Special Purpose Procurement Notes

Verify the specific suffix GN indicates the 24-lead plastic SSOP package configuration. Confirm that the #PBF designation ensures compliance with RoHS standards and absence of hazardous substances. Ensure the ordering part number matches the exact manufacturer specification to guarantee correct package type and environmental rating.

Analog Switches - Special Purpose Selection Notes

Select this component for applications requiring high-speed video signal routing with minimal external resistor requirements due to the fixed internal gain. Consider the 24-lead SSOP package constraints regarding thermal dissipation and PCB layout space. Evaluate the need for separate analog ground connections to maintain specified channel separation performance.

Analog Switches - Special Purpose Part Context

This component belongs to the LT6555 family of high-speed video multiplexers. The CGN variant specifically denotes the commercial temperature grade range and the narrow SSOP package style. It shares core electrical characteristics with other suffixes like CUF (QFN) but differs in physical footprint and thermal properties.

Analog Switches - Special Purpose Replacement Considerations

LT6555CUF#PBF

Analog Switches - Special Purpose FAQ

How does the LT6555 handle input signals exceeding the output swing limits?

The device utilizes input clamps referenced to the VREF pin to prevent damage. Inputs can be driven beyond the clipping point as long as input currents are limited to less than ±10mA.

What is the function of the DGND pin in relation to the EN and SEL pins?

DGND serves as the digital ground reference for the Enable and Select pins. Voltage constraints require that V+ minus VDGN must be at least 4.5V, while VEN and VSEL relative to DGND have maximum limits of 5.5V and 8V respectively.

Can the LT6555 operate with a single supply voltage?

Yes, while optimized for dual supplies, it can operate with a single supply ranging from 4.5V to 12V.