TSH120ICT

Overview

The TSH120ICT is a single-channel video buffer manufactured by STMicroelectronics, designed for operation with supply voltages ranging from +2.2V to +5.5V. It features an internal voltage gain of 6dB and includes a rail-to-rail output stage capable of driving standard 150Ω loads. The device incorporates an internal input DC level shifter and SAG correction circuitry to optimize signal positioning without clamping. An integrated third-order low-pass reconstruction filter attenuates parasitic frequencies, specifically targeting the 27MHz clock frequency from video DACs. The component operates within a temperature range of -40°C to +85°C and is housed in a compact SC70-6 (SOT323-6) surface-mount package.

Feature Summary

• Includes an internal power-down function that enables an ultra-low consumption standby mode via the EN pin.
• Features an internal third-order reconstruction filter designed to suppress parasitic signals generated by video DAC sampling clocks.
• Provides SAG correction capability to minimize external output capacitance requirements while maintaining low-frequency response.

Applications

• Camera phones
• Digital still cameras
• Digital video cameras
• Set-top boxes
• DVD video outputs

Procurement Notes

Verify current availability status as this component may be classified as obsolete or not recommended for new designs. Confirm exact ordering suffixes match required packaging specifications. Ensure compatibility with existing PCB footprints for the SC70-6 package. Review latest datasheet revisions for any updates to electrical characteristics or application notes before finalizing procurement plans.

Selection Notes

Select this component for applications requiring space-saving solutions due to its tiny SC70-6 plastic package. Consider its low quiescent current and dedicated standby mode for battery-powered portable devices. Evaluate its performance at specific operating temperatures and supply voltages against system requirements. Verify that the internal 6dB gain aligns with the desired signal amplification levels without requiring additional external components.

Part Context

The TSH120 belongs to a family of video buffers optimized for consumer electronics. It shares functional similarities with other single-supply video amplifiers but distinguishes itself through integrated SAG correction and reconstruction filtering. This integration reduces the bill of materials and simplifies layout compared to discrete solutions. The device targets high-volume consumer markets where size and power efficiency are critical design constraints.

Replacement Considerations

Check for direct cross-references within the manufacturer's portfolio. Verify if alternative models offer similar gain, bandwidth, and package dimensions. Assess pin-to-pin compatibility to facilitate board upgrades. Review updated datasheets for changes in electrical parameters or thermal performance.

FAQ

How does the TSH120 handle the parasitic frequency from video DACs?

It utilizes an internal third-order low-pass reconstruction filter to attenuate the parasitic frequency, typically at 27MHz, generated by the video DAC clock.

What is the purpose of the SAG correction feature?

SAG correction allows the reduction of the external output capacitor value while maintaining a very low frequency pole, enabling direct connection to video lines in some configurations.

Can the TSH120 operate in a low-power state?

Yes, it features a power-down function accessible via the EN pin, which switches the device to a sleep mode with ultra-low consumption.