L9216B/H
Preliminary Data Sheet
September 2001
High-Voltage Ringing SLIC with Ground Start
Supervision (continued)
Power Ring (continued)
Square Wave Input Signal and Trapezoidal Power Ring Signal Output (continued)
Figure 19 and Figure 20 provide some guidance to the relationship between crest factor, battery voltage, and R1
value.
1.36
1.35
1.34
1.33
1.32
1.31
1.3
1.29
1.28
1.27
1.26
58
60
62
64
66
68
70
72
BAT V
12-3576F
Figure 19. Crest Factor vs. Battery Voltage
1.5
1.45
1.4
1.35
1.3
1.25
10
10.5
11
11.5
12
12.5
13
13.5
14
R (kΩ)
12-3577F
Figure 20. Crest Factor vs. R (kΩ)
During nonring modes, the square wave input may be left on or removed from RINGIN. Via the state table, the ring
signal will be removed from tip and ring even if the low-voltage input is still present at RINGIN. However, removing
the waveform has certain advantages in terms of the timing of state. These advantages are detailed in the Switch-
ing Behavior of L9215/16 Ringing SLIC Application Note.
30
Agere Systems Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
