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TEA1014 View Datasheet(PDF) - STMicroelectronics

Part Name
Description
Manufacturer
TEA1014 Datasheet PDF : 6 Pages
1 2 3 4 5 6
TEA1014
CIRCUIT DESCRIPTION
The main functions of the I.C. are following :
Video Switching
2 electronically switched inputs :
- one 2.5VPP input for internal video.
- one 1VPP input for signal coming from the peri-TV
plug.
2 outputs :
- 1VPP output (low impedance 75) for peri-TV
plug.
- 1VPP output low impedance for video section of
the TV set.
Each input and output is protected from ground
short-circuit. The 75output is protected through
a 75resistor.
Audio Switching
Two electronically switched inputs :
- 300mV rms input coming from internal audio.
- 100mV rms input coming from the peri-TV plug
one low impedance output 300mVRMS.
APPLICATION CIRCUIT
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
TV plug)
- Band III information
- Video recorder key.
External Video and Audio signals are selected in
two cases.
- When there is a voltage information coming from
peri-TV plug.
- When the video recorder key is selected (on TV
front panel) and programmed on band III.
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.
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