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| 型號(hào)： | L9313 |
| 英文描述： | Line Interface and Line Access Circuit Full-Feature SLIC and Ringing for TR-57 Applications |
| 中文描述： | 線路接口和線路接入電路全功能SLIC和敲響訓(xùn)練班- 57應(yīng)用 |
| 文件頁(yè)數(shù)： | 10/40頁(yè) |
| 文件大小： | 746K |
| 代理商： | L9313 |
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Data Sheet
September 2001
Full-Feature SLIC and Ringing Relay for TR-57 Applications
L9313 Line Interface and Line Access Circuit
10
Agere Systems Inc.
Pin Information
(continued)
Table 1. Pin Descriptions
(continued)
Operating States
Input State Coding
Data control is via a parallel latched data control scheme. Data latches are edge-level sensitive. Data is latched in
when the LATCH control input goes low. Data must be set up 200 ns before LATCH goes low and held 50 ns after
LATCH goes high. While LATCH is low, the user should not change the data control inputs at B0, B1, and B2. The
data control inputs at B0, B1, and B2 may only be changed when LATCH is high. NSTAT supervision output is not
controlled by the LATCH control input.
Table 2. Control States
Pin
35
Symbol Type
ICM
Name/Function
I
Common-Mode Current Sense.
To program tip or ring ground sense threshold, connect
a resistor to ground and connect a capacitor to AGND to filter 50 Hz/60 Hz. If unused, the
pin is connected to ground.
Tip/Ring Voltage Output.
This output is a voltage that is directly proportional to the differ-
ential tip/ring current. A resistor from this node to ITR sets the device transimpedance.
Gain shaping for termination impedance with a COMBO I codec is also achieved with a
network from this node to ITR.
Transmit Gain.
A current output which is proportional to the differential current flowing
from tip to ring. Input to AX amplifier. Connect a resistor from this node to VITR to set
transmit gain to 300
. Gain shaping for termination impedance with a COMBO I codec is
also achieved with a network from this node to VITR.
Transmit ac Input (Noninverting).
Connect a 0.1
μ
F capacitor from this pin to VTX for dc
blocking.
Transmit ac Output Voltage.
The output is a voltage that is directly proportional to the dif-
ferential ac tip/ring current. This output is connected via a proper interface network to the
codec.
Receive ac Signal Input (Noninverting).
This high-impedance input controls the ac dif-
ferential voltage on tip and ring.
Receive ac Signal Input (Inverting).
This high-impedance input controls the ac differen-
tial voltage on tip and ring.
Analog Ground.
Ground return for V
CC
current.
5 V Analog Power Supply.
5 V supply for analog circuitry.
36
VTX
O
37
ITR
I
39
TXI
I
40
VITR
O
41
RCVP
I
42
RCVN
I
43
44
AGND
V
CC
G
P
B2
0
0
0
0
1
1
1
1
X
B1
0
0
1
1
0
0
1
1
X
B0
0
1
0
1
0
1
0
1
X
RESET
1
1
1
1
1
1
1
1
0
State
Scan
Powerup, forward battery
Powerup, reverse battery
Unassigned
Ring
Tip amp
Ring amp
Disconnect, break before make
Disconnect, break before make
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