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U4089B-PFNY Datasheet(PDF) 9 Page - ATMEL Corporation

Part # U4089B-PFNY
Description  Monolithic Integrated Feature Phone Circuit
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

U4089B-PFNY Datasheet(HTML) 9 Page - ATMEL Corporation

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9
4518C–CORD–10/05
U4089B-P
5.
Operating Range of Speaker Amplifier
The basic behavior is illustrated in Figure 5-1. Actual values of IL
ON/ILOFF vary slightly with the
adjustment of the DC characteristics and the selection of the internal line impedance.
Figure 5-1.
Threshold of Speaker Amplifier
Figure 5-2.
Comparator Thresholds Depend on DC Mask and Line Impedance
IL
SA
on
SA
off
IL
off
IL
on
3
4
5
6
7
10.0
12.0
14.0
16.0
18.0
20.0
I
L ( mA )
RDC = 68 k
RDC =
RDC = 130 k
= ILON at line impedance = 600 Ohm
= ILOFF at line impedance = 600 Ohm
= ILON at line impedance = 900 Ohm
= ILOFF at line impedance = 900 Ohm


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