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參數(shù)資料
| 型號： | L9216A |
| 英文描述： | CAP CER 270PF 3.15KVDC R3 RAD |
| 中文描述： | 短環(huán)振鈴用戶接口與地面開始 |
| 文件頁數(shù)： | 9/48頁 |
| 文件大小： | 1062K |
| 代理商： | L9216A |
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Preliminary Data Sheet
September 2001
Short-Loop Ringing SLIC with Ground Start
L9216A/G
Agere Systems Inc.
9
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.
Transmit ac Output Voltage.
Output of internal AAC amplifier.
This output is a voltage that is directly proportional to the differen-
tial ac tip/ring current.
Receive ac Signal Input (Noninverting).
This high-impedance
input controls the ac differential voltage on tip and ring. This node
is a floating input.
Receive ac Signal Input (Inverting).
This high-impedance input
controls the ac differential voltage on tip and ring. This node is a
floating input.
Power Ring Signal Input.
ac-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 propor-
tional to the absolute value of the differential tip/ring current. This
is used to set ring trip threshold.
Current-Limit Program Input.
Connect ground to this pin to set
current-limit to 25 mA, float to this pin to set current limit to 40 mA.
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 spuri-
ous responses. A single-pole filter is needed.
SLIC Internal Reference Voltage.
Output of internal 1.5 V refer-
ence 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
IN
I
6
6
DCOUT
O
7
7
V
PROG
I
8
9
10
9
CF2
CF1
RTFLT
—
—
—
10
12
11
13
V
REF
O
12
13
15
16
AGND
V
CC
GND
PWR
14
15
16
—
19
20
22
V
BAT1
V
BAT2
BGND
NC
PWR
PWR
GND
—
2, 3, 4, 5, 8,
11, 14, 17,
18, 21, 27,
28, 30, 32,
36, 37, 39,
42, 44, 46
23
17
RGDET
O
Ring Ground Detect.
When high, this open collector output indi-
cates the presence of a ring ground or a tip ground. This supervi-
sion output may be used in ground key, ground start or common-
mode fault detection applications.
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 filter 50/60 Hz. If unused, the pin is connected to
ground.
18
24
ICM
I
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