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参数资料
| 型号： | LUCL9219GAR-D |
| 英文描述： | Low-Cost Line Interface with Reverse Battery and Dual Current Limit |
| 中文描述： | 低成本线接口，具有反向电池和双电流限制 |
| 文件页数： | 26/30页 |
| 文件大小： | 397K |
| 代理商： | LUCL9219GAR-D |
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Agere Systems Inc.
5
Data Sheet
November 2001
with Reverse Battery and Dual Current Limit
L9219A/G Low-Cost Line Interface
Pin Information (continued)
Table 1. Pin Descriptions (continued)
PLCC
Symbol
Type
Description
7
LCTH
I
Loop Closure Threshold Input. Connect a resistor to DCOUT to set off-hook
threshold.
8
DCOUT
O
dc Output Voltage. This output is a voltage that is directly proportional to the abso-
lute value of the differential tip/ring current.
9
VBAT
—
Battery Supply. Negative high-voltage power supply.
10
PR
I/O
Protected Ring. The output of the ring driver amplifier and input to loop sensing cir-
cuitry. Connect to the loop through overvoltage protection.
11
CF2
—
Filter Capacitor 2. Connect a 0.1
F capacitor from this pin to AGND.
12
CF1
—
Filter Capacitor 1. Connect a 0.47
F capacitor from this pin to pin CF2.
13
B2
I
State Control Input. B0, B1, and B2 determine the state of the SLIC. See Table 2.
Pin B2 has internal pull-down.
14
B1
I
State Control Input. B0, B1, and B2 determine the state of the SLIC. See Table 2.
Pin B1 has internal pull-down.
15
B0
I
State Control Input. B0, B1, and B2 determine the state of the SLIC. See Table 2.
Pin B0 has internal pull-down.
16
AGND
—
Analog Signal Ground.
17
BGND
—
Battery Ground. Ground return for the battery supply.
18
PT
I/O
Protected Tip. The output of the tip driver amplifier and input to loop sensing cir-
cuitry. Connect to loop through overvoltage protection.
19
RTSN
I
Ring Trip Sense Negative. Connect this pin to the ringing generator signal through a
high-value resistor.
20
RTSP
I
Ring Trip Sense Positive. Connect this pin to the ring relay and the ringer series
resistor through a high-value resistor.
21
NC
—
No Connect.
22
NSTAT
O
Ring Trip Detector Output/Loop Detector Output. When low, this logic output indi-
cates that ringing is tripped or that an off-hook condition exists.
23
VITR
O
ac Output Voltage. The voltage at this point is directly proportional to the differential
tip/ring current.
24
TXI
I
ac/dc Separation. Connect a 0.1
F capacitor from this point to VTX.
25
VTX
O
ac and dc Output Voltage. This output is a voltage that is directly proportional to the
differential tip/ring current.
26
TG
—
Transmit Gain. Connect an 8.06 k
from TG to VTX to set the transmit gain of the
SLIC.
27
TSD
O
Thermal Shutdown. When high, this logic output indicates the device is in thermal
shutdown.
28
NC
—
No Connect.
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| LUCL9219GAR-DT | 制造商:AGERE 制造商全称:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and Dual Current Limit |
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