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MC44BS374T1AD-R2 Datasheet(PDF) 4 Page - Freescale Semiconductor, Inc

No. de pieza MC44BS374T1AD-R2
Descripción Electrónicos  PLL Tuned UHF and VHF Audio/Video High Integration Modulator
PDF  34 Pages
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Fabricante Electrónico  FREESCALE [Freescale Semiconductor, Inc]
Página de inicio  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC44BS374T1AD-R2 Datasheet(HTML) 4 Page - Freescale Semiconductor, Inc

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MC44BS374T1/374T1A Advance Information
Functional Overview
4 Functional Overview
Figure 2 shows a simplified block diagram of the MC44BS374T1/374T1A device.
The MC44BS374T1/374T1A 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 modulate the
UHF/VHF carrier
An on-chip video test pattern generator with an audio test signal is included.
The MC44BS374T1/374T1A operates as a multi-standard modulator and can handle the following systems
using the same external circuit components: B/G, I, D/K, M/N.
High frequency BiCMOS technology allows integration of the UHF tank circuit and certain filtering
functions.
Figure 2. MC44BS374T1/374T1A Simplified Block Diagram
8
13
1
2
6
11
14
9
4
12
7
3
10
15
16
TVOVCC
TVOUT
LOP
VIDEO
SPLLFLT
AUDIO
VCCA
GND
PREEM
XTAL
PLLFLT
GNDD
VCCD
SCL
SDA
BUS SECTION
VCO and PLL SECTION
MODULATOR
SECTION
Clamp
Peak
White
31.25KHz
4MHz
XCO
Ref Divider
/128
Phase
Comp
PLL
Prog
Divider
Prescaler/8
VHF Dividers
Video
Modulator
LPF
LPF
RF Sound
Modulator
ALC
LPF
Prog
Divider
Audio
Amplifier
Sound
Oscillator
and FM
Modulator
Sound
PFD
High Speed
I2C Bus
Receiver
UHF OSC
I2C BUS
I2C BUS
75
Ω
5
GND
Clip
31.25
kHz
FM
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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