FMS6418B Datasheet, PDF (7/11 Pages) Fairchild Semiconductor – Triple Video Driver with Selectable HD/SD Video Filters for RGB, YUV or YPbPr Signals

General Description
The FMS6418B offers comprehensive filtering for set top box or
DVD applications. This part consists of a triple 6th order filter
with selectable 32MHz or 8MHz frequencies. A 2-to-1 multi-
plexer is provided on each filter. The filters are intended for
either YUV, RGB, or YPbPr signals. All channels accept DC cou-
pled ground-referenced 1V signals. The filters provide 2V_pp sig-
nals into AC coupled terminated loads. All channels provide
6dB gain, accept 1V ground referenced inputs, and drive AC
coupled loads. The low-pass filters are powered by 3.3V and the
output buffers are powered by 5.0V.
The FMS6418B is a next generation filter solution from Fairchild
Semiconductor addressing the expanding filtering needs for set
top boxes, and DVD players. The product provides selectable
filtering with cutoff frequencies of 32MHz or 8MHz on the RGB/
YUV/YPbPr channels. Thus, the FMS6418B addresses the
requirement for a single set top box to be compatible with a variety
of resolution standards. Multiplexers on the RGB channels provide
further flexibility. For DVD, set-top box, and TV applications, the
product provides filtering and output drive amplification for three
channels of outputs (RGB/YUV/YPbPr).
Applications
DC Levels
At any given time, the input signal’s DC levels must be between
0.0V and 1.3V to utilize the optimal headroom and to avoid clipping
on the outputs.
Single Supply +5V Operation
For low power consumption, the FMS6418B was designed to
operate off of 5V and 3.3V. V_CCA can be operated from 5V
instead of 3.3V and still meet specifications, except power con-
sumption. When the 3.3V supply is increased to 5V, the typical
current consumption increases by 5mA. The net effect is the
part dissipates an additional 22 percent of power.
Driving the Digital Pins with 3.3V or 5V Logic
Either is allowed as long as the V_IH and V_IL are adhered to.
FMS6418B Rev. 5G
7
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