參數(shù)資料
型號: MC44BS373CAFCR2
廠商: Freescale Semiconductor
文件頁數(shù): 45/52頁
文件大小: 0K
描述: IC MODULATOR AUD/VID U/V 20-QFN
標(biāo)準(zhǔn)包裝: 2,500
類型: NTSC/PAL 調(diào)制器
應(yīng)用: 音頻/視頻,VCR,機(jī)頂盒
安裝類型: 表面貼裝
封裝/外殼: 20-VQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 20-QFN 裸露焊盤(5x5)
包裝: 帶卷 (TR)
MC44BS373CA Data Sheet
MC44BS373CA Functional Overview
4 MC44BS373CA Functional Overview
Figure 2 shows a simplified block diagram of the MC44BS373CA.
Figure 2. MC44BS373CA Simplified Block Diagram
The MC44BS373CA device has three main sections:
A high-speed I2C-compatible bus section
A PLL section to synthesize the UHF /VHF output channel frequency (from an integrated UHF
oscillator, divided for VHF output)
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 MC44BS373CA operates as a multi-standard modulator and can handle the following systems using
the same external circuit components: B /G, I, D /K, L, M/N.
High-frequency BiCMOS technology allows integration of the UHF tank circuit and certain filtering
functions.
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
L/BG
31.25/62.5
31.25 kHz
4-MHz
XCO
Ref Divider
/128
Phase
Comp
PLL
Prog
Divider
Prescaler /8
VHF Dividers
Video
Modulator
LPF
RF Sound
Modulator
L/BG
FM
AM
ALC
LPF
Prog
Divider
AM Modulator
Audio
Amplifier
Sound
Oscillator
and FM
Modulator
Sound
PFD
kHz
High Speed
I2C Bus
Receiver
UHF OSC
I 2
C
B
US
I 2
C
B
U
S
I2C BUS
L/B
G
I 2
C
B
US
75
GND
Clip
AUXIN
CAS
(only in QFN 20)
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