TEA2130 ST Microelectronics, Inc., TEA2130 Datasheet - Page 3

• Manufacturer Part Number: TEA2130
• Description: H/v Deflection With Automatic VCR Switching
• Manufacturer: ST Microelectronics, Inc.

ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
Frame Synchronization
Frame synchronization is fully integrated (no exter-
nal capacitor required).
The frame timing identification logic permits auto-
matic adaptation to 50-60Hz standards or non-in-
terlaced video.
An automatic synchronization window width sys-
tem provides:
- Fast frame capture (7.3ms wide window)
- Good noise immunity (0.4ms narrow window)
The internal generator starts the discharge of the
sawtooth generator capacitor, so that it is not dis-
turbed by line flyback effects.
Thanks to the logic control, the beginning of the
charge phase does not depend on any disturbing
effect of the line flyback. A 32 s timing is automat-
ically applied on standardized transmissions for
perfect interlacing.
In VCR mode, the discharge time is controlled by
an internal monostable independent of the line
frequency and gives a direct frame synchroniza-
tion.
Horizontal Scanning
The horizontal scanning frequency is obtained from
the 500kHz VCO.
The circuit uses two PLL:
- The first one controls the frequency
- The second one controls the relative phase of the
The output pulse has a constant duration of 29 s,
independent of V
off the scanning transistor.
Supersandcastle Generator
This output delivers a 3 level synchronization sig-
nal:
- Burst level
- Line blanking level
- Frame blanking level
In the event of vertical scanning failure, the frame
blanking level goes high to protect the tube.
Symbol
Symbol
output line pulse and the line flyback signals.
R
T
V
V
th(j-a)
I
I
AMB
11
13
CC
16
Supply Voltage
Pulse/Frame Sawtooth Generator Voltage
Output Current
Input Current
Operating Ambient Temperature
Junction-ambient Thermal Resistance
CC
and of any delay in switching-
Parameter
Parameter
Frame Scanning
The current to charge the frame sawtooth gener-
ator is automatically switched to 60Hz operation to
maintain constant amplitude.
Automatic VCR Mode Recognition for Time
Constant Switching
- A third phase comparator is used to detect VCR
- A noise level measurement is realized on the
- VCR signals are detected if peak to peak signal
This threshold is depending on the noise level. So
with a no noisy video signal, the auto VCR switch
sensitivity is maximum, and it decreases when the
noise increases.
- The sensitivity of the noise gate and the auto VCR
- Long and short time constants can be selected
Digital Video Identification
A digital circuit controls the identification signal.
When identification signal is low, the line oscillator
is set on a reference frequency. When identification
signal is high, 1 is locked and the catching phase
can start. So that, the TEA2130 allowed on screen
displays in a steady way even without video signal
(during tuner research for example).
Identification Output
The identification function provides three different
levels :
- 0V : No video identification
- 6V : 60Hz video identification
- 12V : 50Hz video identification
This information may be used for timing research
in the case of frequency or voltage synthetizer type
receivers and for audio muting.
signals and to switch the 1 short time constant.
video synchronization pulse to inhibit the short
time constant if the noise level is superior to an
adjustable threshold.
on pin 2 is superior to an internal threshold.
switch is adjustable by external resistance.
manually by Pin 20.
0 , + 70
V
Value
Value
13.5
CC
40
80
5
- 3
TEA2130
o
Unit
Unit
C/W
mA
mA
o
V
V
C
3/8