MC44BS374T1AEF Freescale, MC44BS374T1AEF Datasheet - Page 4

• Manufacturer Part Number: MC44BS374T1AEF
• Manufacturer: Freescale

Specifications of MC44BS374T1AEF

• Lead Free Status / RoHS Status: Compliant

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:
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.
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
Figure 2. MC44BS374T1/374T1A Simplified Block Diagram
GNDD
2
C-compatible bus section
16
Freescale Semiconductor, Inc.
MC44BS374T1/374T1A Advance Information
For More Information On This Product,
I
2
C BUS
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
Prog
FM
31.25
kHz
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