MC44BS374CAEF Freescale Semiconductor, MC44BS374CAEF Datasheet - Page 4

• Manufacturer Part Number: MC44BS374CAEF
• Description: IC AUDIO/VIDEO MODULATOR 16-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC44BS374CAEF

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

MC44BS374CA Functional Overview
4 MC44BS374CA Functional Overview
Figure 2 shows a simplified block diagram of the MC44BS374CA device.
The MC44BS374CA device has three main sections:
An on-chip video test pattern generator with an audio test signal is included.
The MC44BS374CA 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.
TVOVCC
TVOUT
1. A high speed I
2. A PLL section to synthesize the UHF / VHF output channel frequency (from an integrated
3. A modulator section, which accepts audio and video inputs, then uses them to modulate the
SDA
SCL
UHF oscillator, divided for VHF output)
UHF/VHF carrier
13
12
1
2
VCCD
BUS SECTION
15
High Speed
75Ω
Receiver
LOP
I
2
3
C Bus
GNDD
2
C-compatible bus section
16
Figure 2. MC44BS374CA Simplified Block Diagram
Freescale Semiconductor, Inc.
For More Information On This Product,
I
2
C BUS
MC44BS374CA Technical data
Prescaler/8
I
2
C BUS
Go to: www.freescale.com
RF Sound
Modulator
Modulator
LPF
LPF
Video
VHF Dividers
UHF OSC
White
Peak
Clip
Divider
FM
Prog
31.25KHz
Sound
Divider
PFD
Prog
VIDEO
Clamp
PLLFLT
9
Phase
Comp
PLL
VCO and PLL SECTION
14
31.25KHz
LPF
Modulator
SPLLFLT
Oscillator
and FM
Sound
8
Ref Divider
ALC
/128
MODULATOR
SECTION
Amplifier
Audio
4MHz
XTAL
XCO
4
10
11
5
6
7
GND
AUDIO
PREEM
VCCA
GND