MC44CC375AV Datasheet, PDF (1/16 Pages) Freescale Semiconductor, Inc – PLL Tuned VHF (Channel 3 / 4)Audio / Video Modulator

Freescale Semiconductor
Document Number: MC44CC375AV
Rev 1, 11/2008
PLL Tuned VHF (Channel 3 / 4)
Audio / Video Modulator
MC44CC375AV
The MC44CC375 CMOS RF modulator is the latest generation of the legacy
MC44BC375 products.
The MC44CC375AV is an audio/video RF modulator for use in VCRs, set-top
boxes, and similar devices. It is designed for applications requiring US broad-
cast, channel 3 or channel 4, RF outputs.
A programmable Phase-Locked Loop (PLL) tunes the modulator, and the de-
sired channel 3 or 4 frequency is selected using the external package pin, Chan-
nel Selection (CHS). No external tank circuit components are required, reducing
the sensitivity of the PCB design and the need for external adjustments. The PLL
obtains its reference from a 4.0 MHz crystal oscillator.
The sound oscillator can be turned ON and OFF by the external package pin
Sound Oscillator Control (SOC). A fixed Picture to Sound ratio of 12 dB and
4.5 MHz sound subcarrier are used for MC44CC375AV. A low-power standby
mode is selectable via the pin, Power Save (PSAVE), which turns off all internal
VCOs and mixers.
Also included in this new generation CMOS RF modulator is the Sound Auxil-
iary Input, pin AUX, which bypasses the sound FM modulator. This direct sound
RF modulator has found more and more applications in BTSC stereo systems.
• U.S. broadcast frequency for Channel 3 or 4 operation is selected by CHS pin
PLL TUNED VHF
(CHANNEL 3/4)
AUDIO/VIDEO MODULATOR
EF SUFFIX
SOIC 16 PACKAGE
CASE 751B-05
• Sound Oscillator ON/OFF control selectable by pin SOC
• Picture to Sound ratio set to 12 dB
• Sound subcarrier frequency set to 4.5 MHz
• Low-power standby mode selectable by pin PSAVE
• Direct RF sound carrier input pin AUX (FM modulator bypassed for stereo sound applications)
• ESD protection up to 2 kV
• Peak White Clip enabled
• Transient output inhibit during PLL Lock-up at power-ON
• Available in Pb-free, RoHS compliant, narrow body SOIC 16 package.
ORDERING INFORMATION
Device
Temp. Range
MC44CC375AVEF, R2
0°C to +70°C
Note: For tape and reel, add the R2 suffix.
RoHS
Yes
Video In
Crystal
MC44CC375AV
Clamp
Clip
VCO
Mixer
Σ
TVOUT
Audio In
FM
Audio
Mixer
Control
AUX
Channel 3/4
This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2008. All rights reserved.