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What is STV0056A?

This electronic component, produced by the manufacturer "ST Microelectronics", performs the same function as "SATELLITE SOUND AND VIDEO PROCESSORS".


STV0056A Datasheet PDF - ST Microelectronics

Part Number STV0056A
Description SATELLITE SOUND AND VIDEO PROCESSORS
Manufacturers ST Microelectronics 
Logo ST Microelectronics Logo 


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STV0056A
SATELLITE SOUND AND VIDEO PROCESSOR
SOUND
. TWO INDEPENDENT SOUND DEMODULA-
TORS
. PLL DEMODULATION WITH 5-10MHz FRE-
QUENCY SYNTHESIS
. PROGRAMMABLE FM DEMODULATOR
BANDWIDTH ACCOMODATING FM DEVIA-
TIONS FROM ±30kHz TILL ±400kHz
. PROGRAMMABLE 50/75µs, J17 OR NO DE-
EMPHASIS
. WEGENER PANDA SYSTEM
. TWO AUXILIARY AUDIO INPUTS AND OUT-
PUTS
. GAIN CONTROLLED AND MUTEABLE
AUDIO OUTPUTS
. HIGH IMPEDANCE MODE AUDIO OUTPUTS
FOR TWIN TUNER APPLICATIONS
VIDEO
. COMPOSITE VIDEO 6-bit 0 to 12.7dB GAIN
CONTROL
. COMPOSITE VIDEO SELECTABLE IN-
VERTER
. TWO SELECTABLE VIDEO DE-EMPHASIS
NETWORKS
. 6 x 3 VIDEO MATRIX
. BLACK LEVEL ADJUSTABLE OUTPUT FOR
ON-BOARD VIDEOCRYPT DECODER
. HIGH IMPEDANCE MODE VIDEO OUTPUTS
FOR TWIN TUNER APPLICATIONS
MISCELLANEOUS
. 22kHz TONE GENERATION FOR LNB CON-
TROL
. I2C BUS CONTROL
CHIP ADDRESSES = 06HEX OR 46HEX
. LOW POWER STAND-BY MODE WITH AC-
TIVE AUDIO AND VIDEO MATRIXES
DESCRIPTION
The STV0056A BICMOS integrated circuit realizes
all the necessary signal processing from the tuner
to the Audio/Video input and output connectors
regardless the satellite system.
ADVANCE DATA
SHRINK56
(Plastic Package)
ORDER CODE : STV0056A
PIN CONNECTIONS
FC R
PK IN R
LEVEL R
S1 VID RTN
S3 VID RTN
VOL R
S3 VID OUT
S1 VID OUT
S2 VID OUT
VOL L
S2 VID RTN
S2 OUT L
CLAMP IN
S2 OUT R
UNCL DEEM
VIDEEM2/22kHz
V 12V
VIDEEM1
V GND
B-BAND IN
S2 RTN L
S2 RTN R
FM IN
S3 RTN L
S3 RTN R
AGC L
S3 OUT L
S3 OUT R
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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21
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23
24
25
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56 A GND R
55 FC L
54 PK IN L
53 LEVEL L
52 PK OUT L
51 PK OUT R
50 IREF
49 CPUMP R
48 U75 R
47 DET R
46 AMPLK R
45 A 12V
44 VREF
43 A GND L
42 AGC R
41 AMPLK L
40 U75 L
39 DET L
38 CPUMP L
37 GND 5V
36 VDD 5V
35 XTL
34 J17 L
33 J17 R
32 HA
31 SDA
30 SCL
29 I/O/22kHz
September 1996
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without no tice.
1/26

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STV0056A equivalent
STV0056A
PIN DESCRIPTION (continued)
VIDEO PROCESSING
B-BAND IN
AC-coupled video input from a tuner.
ZIN > 10k±25%. This drives an on-chip video
amplifier. The other input of this amp is AC
grounded by being connected to an internal VREF.
The video amplifier has selectable gain from 0dB
to 12.7dB in 63 steps and its output signal can be
selected normal or inverted.
UNCL DEEM
Deemphasized still unclamped output. It is also an
input of the video matrix.
VIDEEM1
Connected to an external de-emphasis network
(for instance 625 lines PAL de-emphasis).
VIDEEM2 / 22kHz
Connected to an external de-emphasis network
(for instance 525 lines NTSC or other video de-em-
phasis). Alternatively a precise 22kHz tone may be
output by I2C bus control.
CLAMP IN
This pin clamps the most negative extreme of the
input (the sync tips) to 2.7VDC (or appropriate volt-
age). The video at the clamp input is only 1VPP.
This clamped video which is de-emphasised, fil-
tered and clamped (energy dispersal removed) is
normal, negative syncs, video. This signal drives
the Video Matrix input called Normal Video.
It has a weak (1.0µA ±15 %) stable current source
pulling the input towards GND. Otherwise the input
impedance is very high at DC to 1kHz ZIN > 2M.
Video bandwidth through this is -1dB at 5.5MHz.
The CLAMP input DC restore voltage is then used
as a means for getting the correct DC voltage on
the SCART outputs.
S3 VID RTN
This input can be driven for instance by the de-
coder. This input has a DC restoration clamp on its
input. The clamp sink current is 1µA ±15% with the
buffer ZIN > 1M.
S2 VID RTN, S1 VID RTN
External video input 1.0Vpp ACcoupled 75source
impedance. This input has a DC restoration clamp
on its input. The clamp sink current is 1µA ±15%
with the buffer ZIN > 1M. This signal is an input to
the Video Matrix.
S1 VID OUT, S2 VID OUT
Video drivers for SCART 1 and SCART 2. An
external emitter follower buffer is required to drive
a 150load. The average DC voltage to be 1.5V
on the O/P. The signal is video 2.0VPP 5.5MHz BW
with sync tip = 1.2V. These pins get signals from
the Video Matrix. The signal selected from the
Video Matrix for output on this pin is controlled by
a control register. This output also feature a high
impedance mode for parallel connection.
S3 VID OUT
This output can drive for instance a decoder. Also
it is able to pass 10MHz ; ZOUT < 75. Video on
this pin will be 2VPP. The black level of the ouput
video signal can be adjusted through I2C bus con-
trol to easily interface with on-board Videocrypt
decoder. This output feature an high impedance
mode for parallel connection.
V 12V
+ 12V double bonded : ESD+guard rings and video
circuit power.
V GND
Doubled bonded. Clean VID IN GND. Strategically
placed video power ground connection to reduce
video currents getting into the rest of the circuit.
CONTROL BLOCK
GND 5V
The main power ground connection for the control
logic, registers, the I2C bus interface, synthesizer
& watchdog and XTLOSC.
VDD 5V
Digital +5V power supply.
SCL
This is the I2C busclock line. Clock = DC to 100kHz.
Requires external pull up eg. 10kto 5V.
SDA
This is the I2C bus data line. Requires external pull
up eg. 10kto 5V.
I/O / 22kHz
General purpose input output pin or 22kHz output.
XTL
This pin allows for the on-chip oscillator to be either
used with a crystal to ground of 4MHz or 8MHz, or
to be driven by an external clock source. The
external source can be either 4MHz or 8MHz. A
programmablebit in the control block removes a ÷2
block when the 4MHz option is selected.
HA
Hardware address with internal 135µA pull down.
Chip address is 06 when this pin is grouded and
chip address is 46 when connected to VDD.
5/26


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Featured Datasheets

Part NumberDescriptionMFRS
STV0056AThe function is SATELLITE SOUND AND VIDEO PROCESSORS. ST MicroelectronicsST Microelectronics
STV0056AFThe function is SATELLITE SOUND AND VIDEO PROCESSORS. ST MicroelectronicsST Microelectronics

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