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參數資料
| 型號： | L9215A |
| 英文描述： | CAP CER 2200PF 3.15KVDC R3 RAD |
| 中文描述： | 短回路正弦波振鈴用戶接口 |
| 文件頁數： | 10/50頁 |
| 文件大小： | 1115K |
| 代理商： | L9215A |
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Data Sheet
September 2001
Short-Loop Sine Wave Ringing SLIC
L9215A/G
10
Agere Systems Inc.
Pin Information
(continued)
Table 1. Pin Descriptions
(continued)
32-Pin
PLCC
15
16
48-Pin
MLCC
15
16
Symbol
Type
Name/Function
AGND
V
CC
GND
PWR
Analog Power Supply.
User choice of 5 V or 3.3 V nominal power or sup-
ply.
PWR
Battery Supply 1.
High-voltage battery.
PWR
Battery Supply 2.
Lower-voltage battery.
GND
Battery Ground.
Ground return for the battery supplies.
O
Tip/Ring Ground Detect.
When high, this open collector output indicates
the presence of a ring ground or a tip ground. This supervision output may
be used in ground key or common-mode fault detection applications.
I
Common-Mode Current Sense.
To program tip or ring ground sense
threshold, connect a resistor to V
CC
and connect a capacitor to AGND to fil-
ter 50/60 Hz. If unused, the pin is connected to ground.
—
Polarity Reversal Slowdown Capacitor.
Connect a capacitor from this
node for controlling rate of battery reversal. If ramped battery reversal is
not desired, this pin is left open.
—
Polarity Reversal Slowdown Capacitor.
Connect a capacitor from this
node for controlling rate of battery reversal. If ramped battery reversal is
not desired, this pin is left open.
I/O
Protected Tip.
The output drive of the tip amplifier and input to the loop
sensing circuit. Connect to loop through overvoltage and overcurrent pro-
tection.
I/O
Protected Ring.
The output drive of the ring amplifier and input to the loop
sensing circuit. Connect to loop through overvoltage and overcurrent pro-
tection.
I
u
State Control Input.
These pins have an internal 60 k
pull-up.
Analog Signal Ground.
17
18
19
20
19
20
22
23
V
BAT1
V
BAT2
BGND
TRGDET
21
24
ICM
22
25
FB2
23
26
FB1
24
29
PT
25
31
PR
26
27
28
29
30
33
34
35
36
38
B2
B1
B0
BR
ITR
I
Transmit Gain.
Input to AX amplifier. Connect a resistor from this node to
VTX to set transmit gain. Gain shaping for termination impedance with a
COMBO I codec is also achieved with a network from this node to VTX.
ac Output Voltage.
Output of internal AX amplifier. The voltage at this pin
is directly proportional to the differential tip/ring current.
ac/dc Separation.
Input to internal AAC amplifier. Connect a 0.1
μ
F capac-
itor from this pin to VTX.
31
40
VTX
O
32
41
TXI
I
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