1FEATURES

2• 4-SDTV Video Amplifiers for CVBS, S-Video,

Y'P'BP'R 480i/576i, Y'U'V', or G'B'R' (R'G'B')

• Integrated Low-Pass Filters:

– 6th-Order 9.5-MHz (–3 dB) Butterworth

– –1 dB Passband Bandwidth at 8.2-MHz

– 54-dB Attenuation at 27-MHz

• 150-MHz (–3 dB) Filter Bypass Mode

• Versatile Input Biasing

– DC-Coupled with 300-mV Output Shift

– AC-Coupled with Sync-Tip Clamp

– AC-Coupled with Biasing Allowed

• Built-in 6-dB Gain (2 V/V)

• +3-V to +5-V Single-Supply Operation

• Rail-to-Rail Output:

– Output Swings Within 100 mV from the

Rails to Allow AC or DC Output Coupling

– Supports Driving 2 Lines per Channel

• Low 9.6-mA at 3.3-V Total Quiescent Current

• 0.1-mA Disabled Supply Current Function

• Low Differential Gain/Phase of 0.15%/0.3°

• Lead-Free and Green TSSOP-14 Package

APPLICATIONS

• Low-Cost SCART Systems

• Set Top Box Output Video Buffering

• Surveillance Systems

DESCRIPTION

Fabricated using the revolutionary complementary

Silicon-Germanium (SiGe) BiCom3X process, the

THS7374 is a low-power, single-supply 3 V to 5 V

four-channel integrated video buffer. It incorporates a sixth-order Butterworth filter (able to be bypassed)

which is useful as a digital-to-analog converter (DAC)

reconstruction filter or an analog-to-digital converter

(ADC) anti-aliasing filter. The 9.5-MHz filter is a

perfect choice for SDTV video that includes

composite (CVBS), s-video, Y'U'V', G'B'R' (R'G'B'),

and Y'P'BP'R 480i/576i.

As part of the THS7374 flexibility, the input can be

configured for either ac or dc-coupled inputs. The

300-mV output level shift allows for a full sync

dynamic range at the output with 0-V input. The

ac-coupled modes include a transparent sync-tip

clamp option for CVBS, Y', and G'B'R' signals with

sync. AC-coupled biasing for C'/P'B/P'R channels can

easily be achieved by adding an external resistor.

The THS7374 is the perfect choice for all video buffer

applications. Its rail-to-rail output stage with 6-dB gain allows for both ac and dc line driving. The ability to

drive two lines per channel, or 75-Ω loads, allows for

maximum flexibility as a video line driver. The 9.6-mA

total quiescent current at 3.3 V and 0.1-mA disabled

current makes it an excellent choice for portable or

other power-sensitive applications.

The THS7374 is available in a TSSOP-14 package

that is lead-free and green (RoHS) compliant.