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MC44BC374T1 Datasheet(PDF) 3 Page - Freescale Semiconductor, Inc

Part No. MC44BC374T1
Description  PLL Tuned PAL/NTSC UHF and VHF Audio/Video High Integration Modulator IC
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Maker  FREESCALE [Freescale Semiconductor, Inc]
Homepage  http://www.freescale.com
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MC44BC374T1 Datasheet(HTML) 3 Page - Freescale Semiconductor, Inc

 
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Device Overview
MC44BC374T1 Technical Data
2 Device Overview
Figure 2 shows a simplified block diagram of the MC44BC374T1device.
The MC44BC374T1 device has three main sections:
1. A high speed I2C-compatible bus section
2. A PLL section to synthesize the UHF/VHF output channel frequency (from an integrated
UHF oscillator, divided for VHF output)
3. A modulator section, which accepts audio and video inputs, then uses them to modulates
the UHF/VHF carrier
An on-chip video test pattern generator with an audio test signal is included. The MC44BC374T1 is
designed to operate as a B/G standard modulator. High frequency BiCMOS technology allows integration
of the UHF tank circuit and certain filtering functions.
Figure 2. MC44BC374T1 Simplified Block Diagram
8
13
1
2
6
11
14
9
4
12
7
3
10
15
16
TVOVCC
TVOUT
STBY
VIDEO
SPLLFLT
AUDIO
VCCA
GND
PREEM
XTAL
PLLFLT
GNDD
VCCD
SCL
SDA
BUS SECTION
VCO and PLL SECTION
MODULATOR
SECTION
Clamp
Peak
White
31.25
31.25KHz
4MHz
XCO
Ref Divider
/128
Phase
Comp
PLL
Prog
Divider
Prescaler/8
VHF Dividers
Video
Modulator
LPF
LPF
Sound
Modulator
FM
ALC
LPF
Prog
Divider
Audio
Amplifier
Sound
Oscillator
and FM
Modulator
Sound
PFD
kHz
High Speed
I2CBus
Receiver
UHF OSC
I2CBUS
I2CBUS
75
5
GND
Clip
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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