TSH345ID

Overview

The TSH345ID is a triple single-supply video buffer manufactured by STMicroelectronics, designed for HD and SD video applications. It features an internal gain of 6 dB and selectable filtering for outputs on 75 Ω video lines. The device operates from a 4.5 V to 5.5 V supply with a maximum junction temperature of 150 °C. Key electrical parameters include a total supply current of 45 mA typical at +5 V, an output DC shift of 240 mV typical, and input bias current of 1.4 µA typical. Thermal resistance is 22 °C/W (junction-to-case) for the SO-14 package.

Feature Summary

• Triple matched amplifiers with selectable 6th order filtering for standard definition, progressive video, and high definition signals
• Internal input DC level shifter enables direct driving of video signals without requiring input capacitors
• Integrated multiplexer allows selection between two independent video sources for each channel

Applications

• High-end video systems
• High definition TV (HDTV)
• Broadcast and graphic video
• Multimedia products

Procurement Notes

Verify the specific suffix 'ID' corresponds to the SO-14 plastic package and -40°C to +85°C operating range as defined in the ordering information table. Confirm that the tube packing format matches the requirements for the manufacturing process. Ensure the component grade meets environmental compliance standards specified by the manufacturer.

Selection Notes

Select this component when designing circuits requiring three buffered video channels with integrated filtering and source switching. The internal DC level shifter simplifies board layout by eliminating external coupling capacitors. Verify that the load impedance is compatible with the specified 150 Ω testing conditions to ensure optimal linearity and distortion performance.

Part Context

The TSH345ID belongs to the TSH345 series of video buffers. This series includes variants such as the TSH345IDT and TSH345IPT, which differ primarily in packaging and shipping formats. The ID suffix specifically denotes the SO-14 surface-mount package configuration.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.