L9216B/H
High-Voltage Ringing SLIC with Ground Start
Preliminary Data Sheet
September 2001
Supervision
(continued)
Power Ring
(continued)
Square Wave Input Signal and Trapezoidal Power Ring Signal Output
(continued)
1
value.
1.36
1.35
1.34
1.33
1.32
CF
1.31
1.3
1.29
1.28
1.27
1.26
58
60
62
64
BAT V
12-3576F
66
68
70
72
Figure 19. Crest Factor vs. Battery Voltage
1.5
1.45
1.4
CF
1.35
1.3
1.25
10
10.5
11
11.5
12
R (kΩ)
12.5
13
13.5
14
12-3577F
Figure 20. Crest Factor vs. R (kΩ)
During nonring modes, the square wave input may be left on or removed from RING
IN
. Via the state table, the ring
signal will be removed from tip and ring even if the low-voltage input is still present at RING
IN
. 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 ]
