MC44BS373CAEFR2 데이터 시트보기 (PDF) - Freescale Semiconductor
부품명
상세내역
제조사
MC44BS373CAEFR2 Datasheet PDF : 52 Pages
| |||
MC44BS373CA Functional Overview
4 MC44BS373CA Functional Overview
Figure 2 shows a simplified block diagram of the MC44BS373CA.
LOP
TVOVCC
TVOUT
75 Ω
CAS
BUS SECTION
(only in QFN 20)
SCL
SDA
High Speed
I2C Bus
Receiver
VCCD GNDD
VIDEO SPLLFLT
I2C BUS
Peak
White
Clip
Clamp
L / BG
Video
Modulator
31.25/62.5
kHz
Sound
LPF
PFD
MODULATOR
SECTION
Sound
Oscillator
and FM
Modulator
Audio
Amplifier
AUDIO
PREEM
Prog
Divider
LPF ALC
LPF
VCCA
GND
RF Sound
Modulator
FM
L / BG
AM
AM Modulator
VHF Dividers
VCO and PLL SECTION
GND
AUXIN
(only in QFN 20)
UHF OSC
PLL
Prescaler / 8
I2C BUS
Prog
Divider
Phase
Comp
Ref Divider
/ 128
31.25 kHz
PLLFLT
4-MHz
XCO
XTAL
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.
MC44BS373CA Data Sheet
Share Link: 