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* This specification are subject to be changed without notice.
AG8889
CALL WAITING DECODER
8.8.2000
APPLICATION NOTE
1. VDD, GND
To reduce noise effects, separate the analog and digital systems close to the device. For both the digital and
analog VDD pins, use a ceramic capacitor of about 0.1uF set as close as possible to the pin to bypass to the
respective GND's.
2. PWD pin
By connecting PWD pin to GND, normal mode is obtained. In the normal mode, the oscillator is activated then
ready to decode CAS signal and the chip consumes operating current. By connecting PWD pin to VDD, the
chip is on power down mode and the chip consumes just stand-by current.
3. OPO pin
This pin is the gain adjustment of internal OP Amp.
4. XIN, XOUT pins
If the resonator is used, two capacitors about 33pF and 1M( resistor have to be connected for frequency
accuracy.