feature

Three-channel video reconstruction filter, YUV/RGB filter 2:1 Mux input for multiple RGB/YUV inputs, selectable 8MHz or 30MHz 6th order filter for RGB (YUV) applications 8MHz 6th order Y,C filter, With compound summer, DC-coupled input, AC-coupled output All outputs can drive AC-coupled 150 Ω loads and provide 6dB gain, dual multiple inputs 0.6% differential gain, 0.2° differential phase 36dB/octave attenuation on all channels

application

Cable STB, Satellite STB, DVD Player, HDTV, Personal Video Recorder (PVR), Video on Demand (VOD)

illustrate

The FMS6419 provides full filtering or DVD applications for set-top boxes. This part consists of three 6th order filters with a frequency selectable 30MHz or 8MHz. A 2-to-1 multiplexer is provided on each filter channel. This triple filter works with YUV or RGB signals. All channels accept DC coupled ground referenced 1V signals. The filter supplies the 2Vpp signal to the AC-coupled termination load. The low pass filter is powered by 3.3V and the output is 5.0V.

Electrical Specifications (TC=25°C, Vi)

=1Vpp; VCCA=3.3V, VCCO=5.0V, all inputs AC coupled to 0.1µF, all outputs AC coupled to 150Ω with 220µF, referenced to 400kHz; unless otherwise noted)

Standard defines electrical specifications (TC=25°C, Vi)=1Vpp; VCCA=3.3V, VCCO=5.0V, FSEL=0, all inputs AC coupled 0.1µF, all outputs AC coupled with 220µF into 150Ω, referenced to 400kHz; unless otherwise stated)

notes:

1.100% tested at 25°C.

General note: The spike capacitor adds a nominal 0.7dB to the CV output at 4.2MHz.

High Definition Electrical Specifications (TC=25°C, Vi)=1Vpp; VCCA=3.3V, VCCO=5.0V, FSEL=1, all inputs AC coupled 0.1µF, all outputs AC coupled to 150Ω with 220µF, referenced to 400kHz; Unless otherwise indicated)

Standard defines typical performance characteristics (TC=25°C, Vi)=1Vpp; VCCA=3.3V, VCCO=5.0V, FSEL=0, all inputs AC coupling 0.1µF, all outputs AC coupled with 220µF to 150Ω, referenced to 400kHz; Unless otherwise indicated)

Standard defines typical performance characteristics (TC=25°C, Vi)=1Vpp; VCCA=3.3V, VCCO=5.0V, FSEL=0, all inputs AC coupling 0.1µF, all outputs AC coupled with 220µF to 150Ω, referenced to 400kHz; Unless otherwise indicated)

High Definition Typical Performance Characteristics (TC=25°C, Vi)=1Vpp; VCCA=3.3V, VCCO=5.0V, FSEL=1, all inputs AC coupled 0.1µF, all outputs AC coupled with 220µF to 150Ω, referenced to 400kHz ;Unless otherwise indicated)

General

The FMS6419 provides full filtering or DVD applications for set-top boxes. This part consists of three 6th order filters with selectable 30MHz or 8MHz frequency and a double filter for compounding and filtering Y,C. A 2-to-1 multiplexer on the triple filter provides an auxiliary input for the composite channel. This triple filter works with YUV or RGB signals. All channels accept DC-coupled ground-referenced 1V signals. The filter outputs the 2Vpp signal to the AC coupling to complete the loading. The low pass filter is powered by 3.3V and the output buffer is powered by 5.0V. The FMS6419 is from Fairchild Semiconductor addressing the need for extended filtering for set-top boxes and DVD players. Products are in RGB channels. Therefore, the FMS6419 meets the requirement or resolution standard that a single set-top box is compatible with multiple set-top boxes. In addition, the product offers additional filters for Y, C, and composite video (CV) outputs. Multiplexers on RGB and CV channels provide further flexibility. For DVD applications, the product provides filtering and 6-output driver amplification. These include R, G, B, Y, C and CV outputs. For set-top boxes, this product provides 2 channels of video to be filtered, as well as optional high-order filtering for flexible multi-resolution standards. Additional flexibility is provided by Y (Luma) and C (chroma) filters with composite sums. All channels provide 6dB gain, accept 1V ground referenced inputs, and drive AC-coupled loads. Filters for R, G, B, Y, C and CV channels are powered by a 3.3V supply as well as a 5V output.

application

DC Level The DC level of the input signal must be between 0.0V and 1.3V at any given time, taking advantage of optimal headroom and avoiding clipping of the output. The Y channel should nominally have the sync terminal on ground and be a 1V signal. The C channel should be around 0.5 volts. This testament ensures that the filter utilizes optimal headroom to avoid splicing. The DC-coupled output applies a 220µF capacitor coupled with a 150Ω termination to form a high pass filter that passes the video frequency and avoids tilt. Lower values, such as pin configuration 10 microF, can create problems. With AC coupling, the average DC level is zero. Therefore, the output voltages of all channels will be centered around zero. Alternatively, DC coupling allows the output of the FMS6419, but is not recommended. There are a few compromises: The average DC level at the output is 2V. Each output will consume an additional nominally 40 MW. The application will need to accommodate a 1V DC offset to the sync tip. Also, it is recommended to limit a 150Ω load per output. Drive digital pins or 5V logic with 3.3V as long as Vih and Vil stick.

Pin configuration

pin assignment