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參數(shù)資料
| 型號： | L9500A |
| 英文描述： | High-Voltage Ringing SLIC for VolP Applications |
| 中文描述： | 高壓振鈴用戶接口應(yīng)用的福爾普 |
| 文件頁數(shù)： | 8/32頁 |
| 文件大?。?/td> | 616K |
| 代理商： | L9500A |
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Preliminary Data Sheet
September 2001
High-Voltage Ringing SLIC for VoIP Applications
L9500A
8
Agere Systems Inc.
Pin Information
(continued)
Table 1. Pin Descriptions
28-Pin
PLCC
1
48-Pin
MLCC
43
Symbol
Type
Name/Function
NSTAT
O
Loop Closure Detector Output—Ring Trip Detector Output.
When low, this logic output indicates that an off-hook condition
exists or ringing is tripped or a ring ground has occurred.
Transmit ac Output Voltage.
Output of internal AAC amplifier.
This output is a voltage that is directly proportional to the differ-
ential ac tip/ring current.
Receive ac Signal Input (Noninverting).
This high-impedance
input controls to ac differential voltage on tip and ring. This node
is a floating input.
Receive ac Signal Input (Inverting).
This high-impedance
input controls to ac differential voltage on tip and ring. This node
is a floating input.
Power Ring Signal Input.
Couple to a sine wave or lower crest
factor low-voltage ring signal. The input here is amplified to pro-
vide the full power ring signal at tip and ring. This signal may be
applied continuously, even during nonringing states.
Power Ring Signal Input.
Couple to a sine wave or lower crest
factor low-voltage ring signal. The input here is amplified to pro-
vide the full power ring signal at tip and ring. This signal may be
applied continuously, even during nonringing states.
dc Output Voltage.
This output is a voltage that is directly pro-
portional to the absolute value of the differential tip/ring current.
This is used to set ring trip threshold.
Filter Capacitor.
Connect a capacitor from this node to ground.
Filter Capacitor.
Connect a capacitor from this node to CF2.
Ring Trip Filter.
Connect this lead to DCOUT via a resistor and
to AGND with a capacitor to filter the ring trip circuit to prevent
spurious responses. A single-pole filter is needed.
SLIC Internal Reference Voltage.
Output of internal 1.5 V ref-
erence voltage.
Analog Signal Ground.
Analog Power Supply.
User choice of 5 V or 3.3 V nominal
power or supply.
Battery Supply 1.
High-voltage battery.
Battery Supply 2.
Lower-voltage battery.
Battery Ground.
Ground return for the battery supplies.
No Connection.
2
45
VITR
O
3
47
RCVP
I
4
48
RCVN
I
5
1
RING
INN
I
6
2
RING
INP
I
7
6
DCOUT
O
8
9
10
8
10
12
CF2
CF1
RTFLT
—
—
—
11
13
V
REF
O
12
13
15
16
AGND
V
CC
GND
PWR
14
15
16
17
19
21
23
V
BAT1
V
BAT2
BGND
NC
PWR
PWR
GND
—
3, 4, 5, 7, 9, 11,
14, 17, 18, 20,
22, 27, 29, 30,
32, 36, 37, 40,
42, 44, 46
24
18
V
PROG
I
Current-Limit Program Input.
Connect ground to this pin to set
current limit to 25 mA; leave this pin open to set current limit to
40 mA.
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