Philips Semiconductors
Signal-sources switch
APPLICATION NOTES
Input protection circuit and indication
Product specification
TDA1029
Fig.7 Circuit diagram showing input protection and indication.
Unused signal inputs
Any unused inputs must be connected to a d.c. (bias) voltage, which is within the d.c. input voltage range; e.g. unused
inputs can be connected directly to pin 10.
Circuits with standby operation
The control inputs (pins 11, 12 and 13) are high-ohmic at VSH ≤ 20 V (ISH ≤ 1 µA), as well as, when the supply voltage
(pin 14) is switched off.
January 1980
10