tda8708a NXP Semiconductors, tda8708a Datasheet - Page 3

• Manufacturer Part Number: tda8708a
• Description: Video Analog Input Interface
• Manufacturer: NXP Semiconductors

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Philips Semiconductors
BLOCK DIAGRAM
June 1994
Video analog input interface
peak level current
clamp capacitor
AGC capacitor
video input 0
video input 1
video input 2
resistor input
connection
connection
selection bit 0
video input
16
17
18
24
25
28
SELECTOR
sync pulse
sync level
INPUT
14
SELECTION
27
video input
selection bit 1
CLAMP
AGC &
LOGIC
MODE
15
&
black level
sync pulse
AMPLIFIER
26
VIDEO
voltage
analog
output
digital V CCD
Fig.1 Block diagram.
(+ 5 V)
19
6
ADC
input
DIGITAL COMPARATOR
DIGITAL COMPARATOR
DIGITAL COMPARATOR
20
TDA8708A
3
AMP.
BLACK LEVEL
PEAK LEVEL
SYNC LEVEL
ground
digital
8
clock
input
analog V CCA
5
8 - bit
ADC
(+ 5 V)
decoupling
input
22
21
analog
ground
OUTPUTS
TTL outputs
23
TTL
7
10
11
12
13
9
1
2
3
4
V CCO (+ 5 V)
MBB965
Product specification
output format/
(3-state input)
D7
D6
D5
D4
D3
D2
D1
D0
chip enable
TDA8708A