This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
September 2003
1/15
STV6432
Audio/Video Output Buffers
for STB and DVD Devices
FEATURES
s
VIDEO SECTION
q
Y/C/CVBS Inputs
q
Y/C Outputs for TV
q
4 CVBS Outputs (for TV, VCR, Aux and RF
Modulator)
q
6 dB Gain with Fine Adjustment
q
Integrated 150
Buffers
q
Sync Bottom Clamp on all CVBS/Y And Bias
on C Inputs
q
Crosstalk: 50 dB (Typ.)
q
Bandwidth: 15 MHz
s
AUDIO SECTION
q
1 pair of Stereo Inputs
q
1 pair of Stereo Outputs (TV, VCR, AUX)
q
Stereo-to-Mono Capability (RF Mod output)
q
6 dB Gain
q
Crosstalk: 80 dB min.
DESCRIPTION
The STV6432 is an audio/video output interface for
US STB and DVD.
It adapts in amplitude and impedance the audio
and video signals coming from the digital decoder
to provide them to the TV set, VCR, Auxiliary and
RF modulator.
The video gains are adjustable from 5 dB to 8 dB in
steps of 1 dB.
SO28
ORDER CODE: STV6432
STV6432
2/15
TABLE OF CONTENTS
Chapter 1
PIN CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Chapter 2
ELECTRICAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.1
Absolute Maximum Ratings ................................................................................................ 5
2.2
Thermal Data ...................................................................................................................... 5
2.3
Supply Section ..................................................................................................................... 5
2.4
Audio Section ....................................................................................................................... 6
2.5
Video Section ....................................................................................................................... 7
2.6
Chroma Section ................................................................................................................... 8
Chapter 3
INPUT/OUTPUT GROUPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Chapter 4
APPLICATION DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Chapter 5
PACKAGE MECHANICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Chapter 6
REVISION HISTORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3/15
STV6432
PIN CONNECTIONS
1
PIN CONNECTIONS
Figure 1: Pin Connections on SO28 Package
Table 1: Pin List Description
Pin No.
Symbol
Description
1
CVBSOUT_VCR
CVBS Output to VCR
2
CVBSOUT_TV
CVBS Output to TV
3
V
CCB2
+5 V Video Output Buffers Supply
4
COUT_TV
Chroma Output to TV
5
V
CCB3
+5 V Video Output Buffers Supply
6
YOUT_TV
Y Output to TV
7
FINE_GAIN
Y/C/CVBS Output Gain Fine Adjustment
8
NC
9
GND
Ground
10
V
CCV
+5 V Video Supply
11
DECV
Video Decoupling Capacitor
12
CVBSIN_ENC
CVBS Input from Encoder
13
CIN_ENC
Chroma Input from Encoder
14
YIN_ENC
Y Input from Encoder
15
GND
Ground
16
RIN_ENC
Audio Right Input from Encoder
17
LIN_ENC
Audio Left Input from Encoder
18
DECA
Audio Decoupling Capacitor
19
GNDA
Audio Ground
20
V
CCA
+9 V Audio Supply or Audio Supply Decoupling
21
ROUT
Audio Right Output
22
LOUT
Audio Left Output
23
V
CC12
Audio Supply (+12V or +9V)
24
AOUT_RF
Audio (L+R) Output to RF Modulator
25
VOUT_RF
CVBS Video Output to RF Modulator
26
V
CCB1
+5 V Video Output Buffers Supply
27
CVBSOUT_AUX
CVBS Output to Auxiliary
28
GNDB
Video Buffer Ground
15
16
17
18
19
20
28
27
26
25
24
23
22
21
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CVBSOUT_VCR
CVBSOUT_TV
YIN_ENC
CIN_ENC
CVBSIN_ENC
DECV
V
CCV
GND
NC
FINE_GAIN
YOUT_TV
V
CCB3
COUT_TV
V
CCB2
GNDB
CVBSOUT_AUX
GND
RIN_ENC
LIN_ENC
DECA
GNDA
V
CCA
ROUT
LOUT
V
CC12
AOUT_RF
VOUT_RF
V
CCB1
PIN CONNECTIONS
STV6432
4/15
Figure 2: STV6432 Block Diagram
6 dB
Clamp
6 dB
Clamp
6 dB
Clamp
6 dB
6 dB
DAC
LPF
LPF
LPF
DI
G
I
T
A
L
D
E
CO
DE
R
STV 6432
LIN_ENC
RIN_ENC
CVBSIN_ENC
CIN_ENC
YIN_ENC
YOUT_TV
COUT_TV
CVBSOUT_TV
CVBSOUT_VCR
VOUT_RF
CVBSOUT_AUX
LOUT
AOUT_RF
ROUT
TV
VCR
RF Mod
AUX
FINE_GAIN
14
13
12
7
17
16
21
24
22
27
25
1
2
4
6
5/15
STV6432
ELECTRICAL CHARACTERISTICS
2
ELECTRICAL CHARACTERISTICS
2.1
Absolute Maximum Ratings
2.2
Thermal Data
2.3
Supply Section
T
AMB
= 25 C, V
CCV
= 5 V, V
CCB
= 5 V, V
CCA
= 9 V
R
GA
= 600
, R
LOUTA
= 10 k
, R
GV
= 75
, R
LOUTV
= 150
, unless otherwise specified.
Table 2: Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
V
CC12
Audio Section
13
V
V
CCA
Audio Section
10
V
V
CCV
,
V
CCB
Video Sections
6
V
V
I
Voltage at Pin 1 to GND
- Audio pins
- Video pins
0, V
CCA
or V
CC12
0, V
CCV
or V
CCB
V
V
ESD
Maximum ESD voltage allowed. 100 pF capacitor discharged through
1.5 k
serial resistor (Human Body Model)
4
kV
T
oper
Operating Ambient Temperature
0, +70
C
T
stg
Storage Temperature
0, +150
C
Table 3: Thermal Data
Symbol
Parameter
Value
Unit
R
th(j-a)
Junction-ambient Thermal Resistance
71 (Max.)
C/W
Table 4: Supply Data
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
CC12
Audio Operating Supply Voltage
Decoupling capacitor on V
CCA
11.5
12
12.5
V
V
CC12
Audio Operating Supply Voltage
V
CC12
connected to V
CCA
8.5
9
9.5
V
V
CCA
Audio Operating Supply Voltage
8.5
9
9.5
V
V
CCV
Video Operating Supply Voltage
4.5
5
5.5
V
V
CCB
Video Buffers Supply Voltage
4.5
5
5.5
V
I
CC12
Audio Output Supply Current
V
CC12
= 12 V, No load
5
mA
I
CCA
Audio Output Supply Current
V
CCA
= 9 V, No load
4
mA
I
CCV
Video Supply Current (V
CCV
)
V
CCV
= 5 V, No load
12
mA
I
CCB
Video Buffers Supply Current (V
CCB
)
V
CCB
= 5 V, No load
20
mA
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