TARGET SPECIFICATION
STV6434
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
1/18
FEATURES
s
Y, C, CVBS Inputs with 7 MHz Filters
s
Y, Pr, Pb Inputs with 14 MHz Filters
s
6 dB Gains
s
Capabilities of Integrated Output Buffers:
Single Load (150
) for Y/Pr/Pb signals
Double Load (75
) for Y, C and CVBS signals
s
DC Coupled Outputs for CVBS and YPrPb
signals, DC or AC coupled output for Chroma
signal
s
Bottom Clamp on Y and CVBS, Bias Clamp
on C, Sync Clamps on Pr and Pb
s
Crosstalk: 55 dB (typ.)
s
Separate Stand-by Modes on Y/C/CVBS and
on Y/Pr/Pb signals
s
Switchable Y+C Adder for Decoders without
CVBS Outputs
DESCRIPTION
The STV6434 is a filtered video output interface for
STB and DVD applications.
After removing D/A conversion noises using
integrated low pass filters, the STV6434 adapts in
amplitude and impedance the video signals coming
from the digital decoder for transmission, via 75
adapted cables, to the TV set, VCR and auxiliary
devices.
The STV6434 is powered by a 5V supply.
The STV6434 is fully compatible with STi55xx
Digital Decoders.
The STV6434 is mounted in a SO24 package
(STV6434S) or in a DIP package (STV6434D).
Order Code: STV6434D
PDIP20
Order Code: STV6434S
SO24
STV6434
2/18
TABLE OF CONTENTS
Chapter 1
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1
I/O Pin Description ............................................................................................................. 4
Chapter 2
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.1
Absolute Maximum Ratings ................................................................................................ 6
2.2
Thermal Data ...................................................................................................................... 6
2.3
Electrical Characteristics ...................................................................................................... 6
Chapter 3
Input/Output Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Chapter 4
Application Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Chapter 5
Package Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Chapter 6
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
General Information
STV6434
4/18
1.1
I/O Pin Description
Table 1: Pin Description
STV6434S STV6434D
Name
Function
1
1
CVBS_ENC
CVBS Input from Encoder command internal CVBS switch
2
2
DEC
Decoupling Capacitor
3
3
C_ENC
Chroma Input from Encoder
4
4
GND
Ground
5
5
Y1_ENC
Y Input from Encoder
6
GND
Ground
7
GND
Ground
8
6
VCC
+5 V Supply
9
7
Y2_ENC
Large-band Y Input from Encoder
10
8
PR_ENC
Large-band Pr Input from Encoder
11
9
MUTE
4-State command for Mute
12
10
PB_ENC
Large-band Pb Input from Encoder
13
11
PBOUT
Pb Output
14
12
PROUT
Pr Output
15
13
VCCB1
+5 V Supply for Output Buffers
16
14
Y2OUT
Y2 Output
17
15
Y1OUT
Y1 Output
18
GND
Ground
19
GND
Ground
20
16
GNDB
Ground for Buffers
21
17
COUT
Chroma Output
22
18
VCCB2
+5 V Supply for Output Buffers
23
19
CVBSOUT
CVBS Output
24
20
VCCB3
+5 V Supply for Output Buffers
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