參數(shù)資料
型號(hào): L9214A
廠商: Lineage Power
英文描述: Low-Cost Ringing SLIC(低價(jià)格振鈴用戶環(huán)路接口電路)
中文描述: 低成本振鈴用戶接口(低價(jià)格振鈴用戶環(huán)路接口電路)
文件頁數(shù): 10/44頁
文件大小: 964K
代理商: L9214A
Preliminary Data Sheet
October 2000
Low-Cost Ringing SLIC
L9214A/G
10
Lucent Technologies Inc.
Pin Information
(continued)
Table 1. Pin Descriptions
(continued)
28-Pin
SOG
16
32-Pin
PLCC
20
Symbol
Type
Name/Function
TRGDET
O
Tip/Ring Ground Detect.
When high, this open collector output indi-
cates 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.
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.
Polarity Reversal Slowdown Capacitor.
Connect a capacitor from
this node for controlling rate of battery reversal. Also used for ringing,
this pin cannot be left open.
Polarity Reversal Slowdown Capacitor.
Connect a capacitor from
this node for controlling rate of battery reversal. Also used for ringing,
this pin cannot be left open.
Protected Tip.
The input to the loop sensing circuit and output drive of
the tip amplifier. Connect to loop through overvoltage and overcurrent
protection.
Protected Ring.
The input to the loop sensing circuit and output drive
of the ring amplifier. Connect to loop through overvoltage and overcur-
rent protection.
State Control Input.
State Control Input.
State Control Input.
State Control Input.
Transmit Gain.
Input to AX amplifier. Connect a resistor from this
node to VTX to set transmit gain. Gain shaping for termination imped-
ance with a COMBO I codec is also achieved with a network from this
node to VTX.
ac/dc 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
capacitor from this pin to VTX.
17
21
ICM
I
18
22
FB2
19
23
FB1
20
24
PT
I/O
21
25
PR
I/O
22
23
24
25
26
26
27
28
29
30
B3
B2
B1
B0
ITR
I
I
I
I
I
27
31
VTX
O
28
32
TXI
I
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