STMICROELECTRONICS STV6433

STV6433
®
Filtered Video Buffers for STB and DVD Devices
TARGET SPECIFICATION
FEATURES
■ Y, C Inputs with 7.1 MHz filters
■ 40 dB Stop Band Attenuation at 27 MHz
■ RF Signal with 14 dB Notch Filter at 4.5 MHz
for Sound Trap
■ RF Signal with -170 ns Differential Group
Delay between 400 kHz and 3.58 MHz
■ 6 dB Gain
■ Capabilities of Integrated Output Buffers:
Double-adapted Loads (75Ω) on CVBS
Output, Single-adapted Loads on Y and C
Outputs
■ AC-coupled Inputs
■ DC-coupled Outputs for Y, CVBS and RFOUT
■ DC- or AC-coupled Output for COUT
■ Bottom Clamp on Y, Bias Clamp on C
SO8
Order Code: STV6433
■ 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.
September 2003
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
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STV6433
Table of Contents
Chapter 1
Pin Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Chapter 2
General Information
Chapter 3
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.1
Absolute Maximum Ratings ................................................................................................ 5
3.2
Thermal Data ...................................................................................................................... 5
3.3
Electrical Characteristics ...................................................................................................... 5
Chapter 4
Package Mechanical Data
Chapter 5
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
STV6433
1
Pin Connections
Pin Connections
Figure 1: STV6433 Pinout
Y_ENC
1
8
YOUT
RF_MOD
2
7
VCC
GND
3
6
CVBSOUT
C_ENC
4
5
COUT
Table 1: STV6433 Pin List
Pin No.
Name
Description
1
Y_ENC
2
RF_MOD
3
GND
4
C_ENC
Chroma Input from Encoder
5
COUT
Chroma Output
6
CVBSOUT
CVBS Output
7
VCC
+5 V Supply
8
YOUT
Y Input from Encoder
CVBS Output for RF modulator
Y Output
3/10
General Information
2
STV6433
General Information
Figure 2: STV6433 Block Diagram
STV6433
C_ENC
7.1MHz
Av. Clamp
6 dB
Buffer
COUT
Digital Encoder
4th order
Buffer
6 dB
Sound Group
Delay
Trap
Y_ENC
7.1MHz
Bot. Clamp
6 dB
4th order
4/10
CVBSOUT
RFOUT
YOUT
Buffer
STV6433
Electrical Characteristics
3
Electrical Characteristics
3.1
Absolute Maximum Ratings
Symbol
VCC
Parameter
Powering
Vi
Voltage at Pin i to GND
VESD
Maximum ESD voltage allowed. 100 pF capacitor discharged through
1.5 kΩ serial resistor (Human Body Model)
TOPER
Ambient Operating Temperature
TSTG
Storage Temperature
3.2
Unit
6
V
-0.6, VCC
V
±4
k
0, +70
°C
-55, +150
°C
Value
Unit
140
°C/W
Thermal Data
Symbol
RthJA
3.3
Value
Parameter
Thermal Resistance (Junction-to-Ambient)
Electrical Characteristics
TAMB = 25°C, VCC = 5 V, RGENE = 75Ω, RLOAD (Y, C, CVBS) = 150Ω, RLOAD (RF) = 600Ω, unless
otherwise specified.
Symbol
Parameter
VCC
Operating Supply Voltage
ICC
Supply Current (VCC)
Test Conditions
Min.
Typ.
Max.
Unit
4.75
5
5.25
V
No Load
30
40
mA
2
V
2
mA
Y and CVBS Section
VDCIN
DC Input Level, Bottom Clamp Input
Bottom Level
ICLAMP
Clamping Current, Bottom Clamp
Input
at VDCIN - 400 mV
Input Leakage Current, Bottom
Clamp Input
VIN = VDCIN +1 V
ILEAK
1
1
10
µA
CIN
Input Capacitance
VIN
Maximum Input Signal
VCCV = 5 V
1.5
VPP
DYN
Dynamic Output Signal
VCCV = 5 V
3
VPP
YF1
-1 dB Bandwidth (Flatness) of Y1
and CVBS
1H Signal
YF3
-3 dB Bandwidth of Y1 and CVBS
YSBR
YOS
2
4.0
pF
4.5
MHz
1H Signal
7.1
MHz
Stopband Rejection
27 MHz / 100 kHz
- 40
dB
Peak Overshoot
2 Vpp Output pulse
5
%
5/10
Electrical Characteristics
Symbol
Flatness
Parameter
Spread of Gain in Video Bands
STV6433
Test Conditions
Min.
Typ.
VIN = 1 VPP
Max.
Unit
+/-0.5
dB
Band = 15kHz -5MHz for Y and
CVBS
VCTo
Crosstalk Isolation of Y or CVBS
from C
ROUT
Output Resistance
GY
VIN = 0.5 VPP at 3.58 MHz,
on C_ENC, RLOAD = 150Ω
55
dB
5
10
W
6
6.5
dB
Gain on Y1, Y2 and CVBS channels
VIN = 1 VPP
DC Output Voltage (Y and CVBS)
Bottom sync pulse, at IC output
pins
0.6
Differential Phase
VIN = 1 VPP at 3.58 MHz
0.2
3
deg.
DG
Differential Gain
VIN = 1 VPP at 3.58 MHz
0.3
3
%
LNL
Luminance non-linearity
0.5
3
%
VSN
Video S/N Ratio: Y and CVBS
channels
Dtpd
Group delay variation from Flatness
DCYOUT
DPHI
5.5
NTC-7 weighting 4.4 MHz
lowpass
V
70
dB
9
nS
RFOUT Section
Tpd
Group Delay RFOUT
f = 3.58 MHz (ref. = 400 kHz)
-205
-170
-135
nS
TCLD
Chroma / Luminance delay
f = 3.58 MHz (ref. = 400 kHz)
-205
-170
-135
nS
DPHIRF
Differential Phase RFOUT
VIN Y,C = 1 VPP at 3.58 MHz
1
3
deg.
Differential Gain RFOUT
VIN Y,C = 1 VPP at 3.58 MHz
1.5
3
%
Gain Peaking
f = 2 MHz
0.5
0.75
dB
RFOS
Peak Overshoot
f = 3.58 MHz (ref. = 400 kHz)
-0.5
0.75
dB
AV45
Notch Attenuation
from 4.4 to 4.63 MHz (ref. =
400kHz)
-14
AV42
Notch Attenuation
at 4.2 MHz (ref. = 400 kHz)
RFSN
Video S/N Ratio: RF channel
NTC-7 weighting 4.4 MHz
lowpass
TPASS
Pass Delay, RFOUT
f = 200 kHz to 3 MHz
DGRF
pK
dB
-8
60
-50
dB
dB
+50
nS
Chroma Section
VDCIN
DC Input Level
3
V
50
kΩ
2
pF
RIN
Input Resistance
CIN
Input Capacitance
VIN
Max Input Signal
1
VPP
Dynamic Output Signal
2
VPP
DYN
DCCOUT
DC Output Voltage (COUT)
CF1
-1 dB Bandwidth (Flatness)
CF3
-3 dB Bandwidth
6/10
30
Without signal
4
1.6
V
4.5
MHz
7.1
MHz
STV6433
Symbol
Electrical Characteristics
Parameter
Test Conditions
CSBR
Stopband Rejection
f = 27 MHz to 100 MHz
COS
Peak Overshoot
CCTo
Crosstalk Isolation of C from Y and
CVBS Channels
ROUT
Output Resistance
GC
Gain on C Channel
VIN = 1 VPP
Chroma to Luma Delay, Y/C Source
VIN = 1 VPP @ 3.58 MHz,
CToYdel
Min.
Typ.
Max.
Unit
- 40
dB
2Vpp Output pulse
4
%
VIN = 1 VPP at 3.58 MHz, on Y or
CVBS inputs, RLOAD = 150Ω
55
dB
5.5
5
10
W
6
6.5
dB
20
ns
7/10
Package Mechanical Data
4
STV6433
Package Mechanical Data
Figure 3: 8-Pin Small Outline Package (SO8)
c1
L
a2
b
C
a3
A
S
e
a1
b1
E
e3
D
M
8
5
F
1
4
Table 2: SO8 Package Dimensions
mm
Inches
Dim.
Min.
A
a1
Typ.
Min.
Typ.
1.75
0.1
Max.
0.069
0.25
a2
0.004
0.010
1.65
0.065
a3
0.65
0.85
0.026
0.033
b
0.35
0.48
0.014
0.019
b1
0.19
0.25
0.007
0.010
C
0.25
0.50
0.010
0.020
c1
8/10
Max.
45°
45°
D
4.8
5.0
0.189
0.197
E
5.8
6.2
0.228
0.244
e
1.27
0.050
e3
3.81
0.150
F
3.8
4.0
0.15
0.157
L
0.40
1.27
0.016
0.050
M
0.60
0.024
S
8°
8°
STV6433
5
Revision History
Revision History
Table 3: Summary of Modifications
Revision
Main Changes
1.0
First Issue
1.1
Edit of FEATURES on page 1.
Date
March 2002
January 2003
9/10
Revision History
STV6433
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously
supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without
express written approval of STMicroelectronics.
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