LT6555CUF#TRPBF

Analog Switches - Special Purpose Overview

The LT6555CUF#TRPBF is a high-speed triple 2:1 video multiplexer manufactured by Analog Devices Inc. in a 24-lead QFN 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, drawing 9mA per amplifier. Key performance metrics include 72dB channel separation at 10MHz, 6.5ns settling time, and low harmonic distortion.

Analog Switches - Special Purpose Feature Summary

• Triple 2:1 analog multiplexer with integrated amplifiers featuring a fixed internal gain of 2
• High-speed signal processing capability with 650MHz small-signal bandwidth and 2200V/µs slew rate
• Independent power supply pins for each amplifier to maximize channel isolation
• Low-power shutdown mode with high-impedance outputs when disabled

Analog Switches - Special Purpose Applications

• RGB video multiplexing for LCD projectors
• UXGA resolution video signal routing
• High-speed line driver circuits

Analog Switches - Special Purpose Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging rather than tube packaging. Confirm the 'C' grade temperature range meets application requirements, as it is specified for 0°C to 70°C operation despite functional guarantees up to 85°C. Ensure the QFN exposed pad soldering process aligns with PCB assembly capabilities.

Analog Switches - Special Purpose Selection Notes

Select this component for applications requiring high-frequency video switching with precise gain control. The QFN package offers a compact footprint suitable for space-constrained designs. Consider the thermal characteristics of the QFN package if operating near maximum voltage limits. Verify that the input impedance and clamping requirements match the source signal levels.

Analog Switches - Special Purpose Part Context

This part belongs to the LT6555 family of video multiplexers. The CU designation identifies the commercial temperature grade, while the UF suffix specifies the 24-lead QFN package. The #TRPBF suffix denotes the tape and reel shipping format and lead-free compliance. Other variants include SSOP packages and industrial temperature grades.

Analog Switches - Special Purpose Replacement Considerations

LT6555IGN#TRPBF (Industrial grade, Tape & Reel)

Analog Switches - Special Purpose FAQ

How does the LT6555 handle unselected inputs?

The device uses input clamps referenced to the VREF pin to limit the voltage on unselected channels, preventing damage to the input stage.

What is the function of the DGND pin?

DGND serves as the digital ground reference for the Enable and Select pins. It must be connected appropriately to ensure correct logic thresholds and ESD protection diode biasing.

Can the LT6555 operate with a single supply?

Yes, it can operate with a single supply voltage ranging from 4.5V to 12V, although it is optimized for dual supply operation.