AG8889N ELAN Microelectronics Corp, AG8889N Datasheet

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AG8889N

Manufacturer Part Number
AG8889N
Description
CALL waiting decoder
Manufacturer
ELAN Microelectronics Corp
Datasheet

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I.
II.
III. APPLICATION
IV. PIN CONFIGURATION
* This specification are subject to be changed without notice.
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.
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)
• Feature phones
• Cordless phones
• Adjunct unit (stand alone)
AG8889AP for 14-pin DIP
AG8889N for 16-pin SOP (150 mil)
VREF
RING
PWD
OPO
VSS
TIP
NC
AG8889AP
1
2
3
4
5
6
7
10
14
13
12
11
9
8
VDD
DO
NC
NC
NC
OSCI
OSCO
VREF
RING
PWD
OPO
VSS
TIP
NC
NC
AG8889N
1
2
3
4
5
6
7
8
12
16
15
14
13
11
10
9
VDD
DO
NC
NC
NC
OSCI
OSCO
NC
CALL WAITING DECODER
8.8.2000
AG8889
1

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AG8889N Summary of contents

Page 1

... 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 ...

Page 2

V. FUNCTIONAL BLOCK DIAGRAM TIP RING Vdd/2 VREF VI. PIN DESCRIPTIONS Pin I/O TIP I Tip in should be connected with twisted pair RING I Ring in should be connected with twisted pair OPO O Output of OP Amp VREF ...

Page 3

DC CHARACTERISTIC VDD=5V, Vss=0V, Ta=25 C, fOSC=3.58MHz Sym. Description VDD operating supply voltage IDD operating supply current VIL low level input voltage VIH high level input voltage VOL low level output voltage VOH high level output voltage Note: 1.both tones ...

Page 4

WAVE FORM TIMING DO timing: line event normal on hook CAS Tvd=Tfvd+Tdvd Tinvd=Tfinvd+Tdinvd OSC timing: Power on/off PWD OSCI (OSCO) Sym. Description Tfvd filter output signal valid delay Tfinvd filter output signal invalid delay Tdvd digital delay of valid signal ...

Page 5

APPLICATION CIRCUIT 1 When PWD pin (pin 6) is controlled by MCU or external hook detect circuit, the users can use the following application. (pin6 is connected to control pin of MCU or hook detect output) 0.01u 250V TIP RING ...

Page 6

APPLICATION CIRCUIT 2 In some application, the call waiting decoder is always powered on , the PWD pin (pin 6) can not be directly connected to the ground, the users have to use the following application. (pin6 is connected with ...

Page 7

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 ...

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