CALL WAITING DECODER
AG8889 CALL WAITING DECODER
I.
GENERAL DESCRIPTION
This is a new version of Call Waiting service decoder on the teleph...
Description
AG8889 CALL WAITING DECODER
I.
GENERAL DESCRIPTION
This is a new version of Call Waiting service decoder on the telephone. Call Waiting service works by alerting a customer engaged in a telephone call to a new incoming call. This way the customer can still receive important calls while engaged in a current call. The Call Waiting decoder can detect dual tone (2130Hz and 2750Hz) alert signal and generate a valid signal on the data pins for micro controller.
II.
FEATURES
Compatible with Bellcore special report SR-TSV-002476 3.6V ~ 6.0V supply voltage Call-Waiting (2130Hz plus 2750Hz) Alert Signal Detector Good talkdown and talkoff performance Sensitivity compensated by adjusting input OP gain Package series --- 14-pin DIP or 16-pin SOP (150 mil) AG8889AP for 14-pin DIP AG8889N for 16-pin SOP (150 mil)
III. APPLICATION
Feature phones Cordless phones Adjunct unit (stand alone)
IV. PIN CONFIGURATION
AG8889AP
TIP RING OPO VREF NC PWD VSS
1 2 3 4 5 6 7 14 13 12 11
AG8889N
VDD DO NC NC NC OSCI OSCO TIP RING OPO VREF NC PWD VSS NC
1 2 3 4 5 6 7 8 16 15 14 13
VDD DO NC NC NC OSCI OSCO NC
10
9 8
12
11 10 9
* This specification are subject to be changed without notice.
8.8.2000
1
AG8889 CALL WAITING DECODER
V.
FUNCTIONAL BLOCK DIAGRAM
OPO
TIP RING
Tone Filter Detection Block
DO
VREF
Vdd/2
Voltage Reference
Clock Generator
OSCI OSCO
PWD
VI. PIN DESCRIPTIONS
Pin TIP RING OPO VREF PWD I/O I I O I Description Tip in should be connected with twisted...
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