MC44BS373CAEFR2 Freescale Semiconductor, MC44BS373CAEFR2 Datasheet - Page 5

• Manufacturer Part Number: MC44BS373CAEFR2
• Description: IC AUD/VID PAL MODULATOR 16-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC44BS373CAEFR2

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MC44BS373CAEFR2TR

4 MC44BS373CA Functional Overview
Figure 2 shows a simplified block diagram of the MC44BS373CA.
The MC44BS373CA device has three main sections:
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.
(only in QFN 20)
TVOVCC
•
•
•
TVOUT
SDA
CAS
SCL
A high-speed I
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
VCCD
BUS SECTION
75 Ω
High Speed
Receiver
LOP
I
2
C Bus
GNDD
2
C-compatible bus section
Figure 2. MC44BS373CA Simplified Block Diagram
I
2
C BUS
Prescaler/8
I
2
MC44BS373CA Data Sheet
C BUS
RF Sound
Modulator
Modulator
LPF
LPF
Video
VHF Dividers
UHF OSC
L /BG
White
Peak
Divider
Clip
Prog
FM
AM
31.25/62.5
kHz
Divider
Sound
PFD
Prog
VIDEO
Clamp
L/BG
PLLFLT
Phase
Comp
PLL
VCO and PLL SECTION
MC44BS373CA Functional Overview
31.25 kHz
LPF
Modulator
SPLLFLT
Oscillator
AM Modulator
and FM
Sound
Ref Divider
ALC
/128
MODULATOR
SECTION
Amplifier
Audio
4-MHz
XTAL
XCO
(only in QFN 20)
AUXIN
AUDIO
PREEM
GND
VCCA
GND