LT1675CGN#TR

Video Processing Overview

The LT1675CGN#TR is a high-speed RGB multiplexer with amplifiers housed in a 16-lead narrow body SSOP package. It features three SPDT switches and three current feedback amplifiers configured for a fixed gain of 2, designed to drive double-terminated 50Ω or 75Ω cables directly. The device operates on supply voltages between ±4V and ±6V, consuming 33mA at ±5V. Key electrical parameters include a 250MHz small-signal bandwidth, an 1100V/µs slew rate, and a channel switching time of 2.5ns.

Video Processing Feature Summary

• Integrates three SPDT switches and three current feedback amplifiers optimized for pixel switching and workstation graphics.
• Features internal fixed gain of 2, eliminating external resistors and stray capacitance on sensitive feedback nodes.
• Utilizes break-before-make switching architecture to minimize input feedthrough and crosstalk during transitions.
• Capable of toggling between sources at frequencies exceeding 100MHz with low switching transients.

Video Processing Applications

• Pixel switching for fast workstation graphics
• RGB video routing and signal switching
• Direct driving of 50Ω or 75Ω coaxial cables
• High-speed signal processing

Video Processing Procurement Notes

Verify the #TR suffix indicates tape and reel packaging when ordering. Confirm the GN package designation corresponds to the 16-lead SSOP form factor required for your PCB layout. Ensure power supply bypassing utilizes quality tantalum capacitors as specified in the datasheet to maintain performance stability.

Video Processing Selection Notes

Select this component for applications requiring simultaneous switching of Red, Green, and Blue channels with minimal glitch transients. The fixed gain configuration simplifies design by removing external gain-setting resistors. Consider the 16-pin SSOP footprint if board space is constrained compared to higher pin count alternatives.

Video Processing Part Context

This part belongs to the LT1675 family, which includes single-channel variants like the LT1675-1. While the LT1675 handles triple RGB signals, the -1 version supports single-channel applications such as video sync. Both share the same underlying high-speed bipolar process technology for consistent switching performance.

Video Processing Replacement Considerations

LT1675CGN (Tube Packaging)

Video Processing FAQ

How does the LT1675 handle switching transients?

The device uses fast current steering break-before-make SPDT switches. This architecture ensures the alternate channel connects only after the previous one opens, resulting in a small 50mV p-p transient lasting 5ns that is typically invisible on quality graphics terminals.

What is the purpose of the ENABLE pin?

Grounding the ENABLE pin allows normal operation. Taking it within 300mV of V+ or leaving it open shuts down the part, reducing supply current to approximately 100µA. This feature is also utilized for expanding inputs in router applications.