LT1205CS#PBF

Analog Switches - Special Purpose Overview

The LT1205CS#PBF is a dual high-speed video multiplexer manufactured by Analog Devices Inc. in a 16-lead narrow body SO package. It functions as a 4-input, 2-output multiplexer with a –3dB bandwidth of 150MHz and 0.1dB gain flatness up to 30MHz. The device features a high slew rate of 300V/μs, channel-to-channel switching time of 25ns, and output short-circuit protection. It operates on a wide supply range from ±5V to ±15V, drawing 28mA per MUX when enabled. Key performance metrics include greater than 90dB channel separation at 10MHz, 0.02% differential gain, and 0.02° differential phase.

Analog Switches - Special Purpose Feature Summary

• Dual SPDT configuration providing four analog inputs and two independent outputs for broadcast-quality routing
• High-speed complementary bipolar process enabling fast pixel switching and minimal signal distortion
• Internal logic buffer interfaces directly with TTL or CMOS control signals without external components
• Outputs can be tied together via the enable feature to form large crosspoint matrices with low shoot-through current

Analog Switches - Special Purpose Applications

• Broadcast quality video multiplexing and routing
• Picture-in-picture switching systems
• Computer graphics display drivers
• Video crosspoint matrices and routers

Analog Switches - Special Purpose Procurement Notes

Verify the component matches the specific 16-lead narrow body SOIC package format. Confirm that the ordering suffix corresponds to the standard commercial grade specifications provided in the datasheet. Ensure the supplier provides documentation confirming compliance with the RoHS directive associated with the PBF suffix.

Analog Switches - Special Purpose Selection Notes

Select this part for applications requiring dual independent video paths within a compact footprint. The LT1205 offers higher integration compared to the single-channel LT1203. Consider the thermal characteristics of the SO package if operating near maximum junction temperatures. Verify that the ±5V to ±15V supply range aligns with the system power architecture.

Analog Switches - Special Purpose Part Context

The LT1205 belongs to the LT1203/LT1205 family of wideband video multiplexers designed for pixel switching. While the LT1203 provides a single 2-input path, the LT1205 integrates two such channels into one package. Both utilize Linear Technology's proprietary complementary bipolar process to achieve high bandwidth and fast switching speeds suitable for professional video equipment.

Analog Switches - Special Purpose Replacement Considerations

LT1203CN8

Analog Switches - Special Purpose FAQ

How does the LT1205 handle multiple devices connected to the same output line?

The LT1205 allows multiple units to have their outputs shorted together to form large crosspoint arrays. When disabled, the output impedance rises to approximately 10MΩ, minimizing interference with active channels.

What is the magnitude of switching transients during channel selection?

The device generates very small switching transients of approximately 50mV peak-to-peak with a duration of about 25ns, preventing glitches from coupling to other video equipment sharing input lines.

Is the LT1205 compatible with standard digital logic levels?

Yes, an on-chip buffer interfaces directly to fast TTL or CMOS logic. Logic High is defined as ≥2V and Logic Low as ≤0.8V.