TARGET SPECIFICATION
STV6433
Filtered Video Buffers for STB and DVD Devices
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
September 2003
1/10
FEATURES
s
Y, C Inputs with 7.1 MHz filters
s
40 dB Stop Band Attenuation at 27 MHz
s
RF Signal with 14 dB Notch Filter at 4.5 MHz
for Sound Trap
s
RF Signal with -170 ns Differential Group
Delay between 400 kHz and 3.58 MHz
s
6 dB Gain
s
Capabilities of Integrated Output Buffers:
Double-adapted Loads (75
) on CVBS
Output, Single-adapted Loads on Y and C
Outputs
s
AC-coupled Inputs
s
DC-coupled Outputs for Y, CVBS and RFOUT
s
DC- or AC-coupled Output for COUT
s
Bottom Clamp on Y, Bias Clamp on C
s
Crosstalk: 55 dB (typical)
DESCRIPTION
The STV6433 is a filtered video output interface for DVD, Satellite and Cable Set-Top Box applications.
After removing D/A conversion noise using integrated low pass filters, the STV6433 adapts the Y and C
signals coming from the digital decoder in amplitude and impedance for transmission to the TV set and an
auxiliary device (VCR, DVD recorders, etc.) via adapted 75-ohm cables.
A Y+C adder with buffer for providing a CVBS signal to external loads and a pre-processing of a CVBS
signal for RF modulator (RFOUT) are included in STV6433.
This pre-processing is a notch filtering at 4.5 MHz (before the addition of the audio signal in the RF
modulator) and a 170 ns Y/C delay (to compensate the nominal distorsion in the TV IF filter).
The STV6433 is powered by a 5V voltage supply and is fully-compatible with STi55xx digital encoders.
Order Code: STV6433
SO8
STV6433
2/10
Table of Contents
Chapter 1
Pin Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Chapter 2
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Chapter 3
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.1
Absolute Maximum Ratings ................................................................................................ 5
3.2
Thermal Data ...................................................................................................................... 5
3.3
Electrical Characteristics ...................................................................................................... 5
Chapter 4
Package Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Chapter 5
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
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STV6433
Electrical Characteristics
3
Electrical Characteristics
3.1
Absolute Maximum Ratings
3.2
Thermal Data
3.3
Electrical Characteristics
T
AMB
= 25C, V
CC
= 5 V, R
GENE
= 75
, R
LOAD
(Y, C, CVBS) = 150
, R
LOAD
(RF) = 600
, unless
otherwise specified.
Symbol
Parameter
Value
Unit
V
CC
Powering
6
V
V
i
Voltage at Pin i to GND
-0.6, V
CC
V
V
ESD
Maximum ESD voltage allowed. 100 pF capacitor discharged through
1.5 k
serial resistor (Human Body Model)
4
k
T
OPER
Ambient Operating Temperature
0, +70
C
T
STG
Storage Temperature
-55, +150
C
Symbol
Parameter
Value
Unit
R
thJA
Thermal Resistance (Junction-to-Ambient)
140
C/W
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
CC
Operating Supply Voltage
4.75
5
5.25
V
I
CC
Supply Current (V
CC
)
No Load
30
40
mA
Y and CVBS Section
V
DCIN
DC Input Level, Bottom Clamp Input
Bottom Level
2
V
I
CLAMP
Clamping Current, Bottom Clamp
Input
at V
DCIN
- 400 mV
1
2
mA
I
LEAK
Input Leakage Current, Bottom
Clamp Input
V
IN
= V
DCIN
+1 V
1
10
A
C
IN
Input Capacitance
2
pF
V
IN
Maximum Input Signal
V
CCV
= 5 V
1.5
V
PP
DYN
Dynamic Output Signal
V
CCV
= 5 V
3
V
PP
YF1
-1 dB Bandwidth (Flatness) of Y1
and CVBS
1H Signal
4.0
4.5
MHz
YF3
-3 dB Bandwidth of Y1 and CVBS
1H Signal
7.1
MHz
YSBR
Stopband Rejection
27 MHz / 100 kHz
- 40
dB
YOS
Peak Overshoot
2 Vpp Output pulse
5
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