MC44BS374CAEF Freescale Semiconductor, MC44BS374CAEF Datasheet - Page 22

• Manufacturer Part Number: MC44BS374CAEF
• Description: IC AUDIO/VIDEO MODULATOR 16-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC44BS374CAEF

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MC44BS374CA Modes of Operation
15.8 Video Section - Peak White Clip
The MC44BS374CA requires the following for proper video functionality:
This signal is AC-coupled to the video input where the sync tip level is clamped.
The video signal is then passed to a Peak White Clip (PWC) circuit. The PWC circuit function soft-clips
the top of the video waveform, if the sync tip amplitude to peak white clip goes too high. This avoids
carrier over-modulation by the video. Clipping can be disabled by software.
15.9 Test Pattern Generator
The I
easily tune to the modulator output. The pattern consists of two white vertical bars on a black background
and a 976 Hz audio test signal.
• A composite video input with negative going sync pulses
• A nominal level of 1 Vpp
2
C generates a simple test pattern, which can be switched under bus control to permit a TV receiver to
0
TE1
Freescale Semiconductor, Inc.
For More Information On This Product,
TE2
10
Figure 7. Test Pattern Generator
MC44BS374CA Technical data
Go to: www.freescale.com
20
24 28
30
TIME IN µS.
40
44
7/10
50
3/10
60
64