TEA1014 ST Microelectronics, Inc., TEA1014 Datasheet - Page 4

• Manufacturer Part Number: TEA1014
• Description: Video And Audio Signals Switchings For The Peri-television Plug
• Manufacturer: ST Microelectronics, Inc.

TEA1014
CIRCUIT DESCRIPTION
The main functions of the I.C. are following :
Video Switching
2 electronically switched inputs :
- one 2.5V
- one 1V
2 outputs :
- 1V
- 1V
Each input and output is protected from ground
short-circuit. The 75
a 75
Audio Switching
Two electronically switched inputs :
- 300mV rms input coming from internal audio.
- 100mV rms input coming from the peri-TV plug
APPLICATION CIRCUIT
4/6
plug.
plug.
the TV set.
one low impedance output 300mV
PP
PP
resistor.
output low impedance for video section of
output (low impedance 75 ) for peri-TV
PP
PP
input for signal coming from the peri-TV
input for internal video.
output is protected through
RMS
.
Inputs and outputs are also protected against
ground short-circuit.
Switching Logic
The logic takes into account the informations on 3
pins.
- Internal or external video and sound (pin 8 peri
- Band III information
- Video recorder key.
External Video and Audio signals are selected in
two cases.
- When there is a voltage information coming from
- When the video recorder key is selected (on TV
This I.C. includes an internal switch (open collector
transistor) which commutes the time constant of
the horizontal PLL circuit in case of video recorder
reception.
TV plug)
peri-TV plug.
front panel) and programmed on band III.