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參數(shù)資料
| 型號： | L9214A |
| 英文描述： | CAP CER 220PF 3.15KVDC R3 RAD |
| 中文描述： | 低成本振鈴用戶接口 |
| 文件頁數(shù)： | 10/46頁 |
| 文件大?。?/td> | 790K |
| 代理商： | L9214A |
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Preliminary Data Sheet
October 2001
Low-Cost Ringing SLIC
L9214A/G
10
Agere Systems Inc.
Pin Information
(continued)
Table 1. Pin Descriptions
28-Pin
SOG
1
32-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.
No Connection.
May be used as a tie point.
—
—
5, 14, 18,
28, 32, 39,
42, 44
1
—
4, 8,
11, 17, 21,
27, 30, 37,
46
45
NC
—
—
2, 6, 7, 8
NC
—
No Connection.
May not be used as a tie point.
2
3
VITR
O
Transmit ac Output Voltage.
Output of internal AAC
amplifier. This output is a voltage that is directly propor-
tional to the differential 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-imped-
ance input controls to ac differential voltage on tip and
ring. This node is a floating input.
dc Output Voltage.
This output is a voltage that is
directly proportional to the absolute value of the differen-
tial tip/ring current. This is used to set the dc current limit
and the ring trip threshold.
Current-Limit Program Input.
A resistor is connected
from this pin to DCOUT to program the dc current limit for
the device.
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 resis-
tor and to AGND with a capacitor or a resistor capacitor
combination, depending on the ringing type, to filter the
ring trip circuit to prevent spurious responses.
SLIC Internal Reference Current.
Connect a resistor
between this pin and AGND to generate an internal refer-
ence current.
Analog Signal Ground.
Analog Power Supply.
User choice of 5 V or 3.3 V nom-
inal power supply.
Battery Supply 1.
High-voltage battery.
Battery Supply 2.
Low-voltage battery or power control
resistor.
Battery Ground.
Ground return for the battery supplies.
3
4
47
RCVP
I
4
5
48
RCVN
I
5
9
6
DCOUT
O
6
10
7
I
PROG
I
7
11
9
CF2
—
8
12
10
CF1
—
9
13
12
RTFLT
—
10
14
13
I
REF
I
11
12
15
16
15
16
AGND
V
CC
GND
PWR
13
14
17
18
19
20
V
BAT1
V
BAT2
PWR
PWR
15
19
22
BGND
GND
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