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參數(shù)資料
| 型號(hào)： | L7556 |
| 廠商： | Lineage Power |
| 英文描述： | Low-Power SLICs （electronic subscriber loop interface circuits ）with Battery Switch(帶電池開關(guān)的低功耗用戶環(huán)路接口電路（SLIC）) |
| 中文描述： | 低功耗SLIC組件（電子用戶環(huán)路接口電路）與電池開關(guān)（帶電池開關(guān)的低功耗用戶環(huán)路接口電路電路（SLIC）） |
| 文件頁數(shù)： | 6/28頁 |
| 文件大?。?/td> | 753K |
| 代理商： | L7556 |
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6
Lucent Technologies Inc.
Data Sheet
January 2000
with Battery Switch
L7556, L7557 Low-Power SLICs
Functional Description
Table 2. Input State Coding
Table 3. Supervision Coding
Absolute Maximum Ratings
(T
A
= 25 °C)
Stresses in excess of the Absolute Maximum Ratings can cause permanent damage to the device. These are
absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in
excess of those given in the operational sections of the data sheet. Exposure to Absolute Maximum Ratings for
extended periods can adversely affect device reliability
.
Note:
The IC can be damaged unless all ground connections are applied before, and removed after, all other connections. Furthermore, when
powering the device, the user must guarantee that no external potential creates a voltage on any pin of the device that exceeds the
device ratings. Some of the known examples of conditions that cause such potentials during powerup are the following:
1. An inductor connected to tip and ring can force an overvoltage on V
BAT
through the protection devices if the V
BAT
connections chatter.
2. Inductance in the V
BAT
leads could resonate with the V
BAT
filter capacitors to cause a destructive overvoltage.
B0
1
B1
1
BS
1
State/Definition
Powerup, Forward Battery.
Normal talk and battery feed state. Pin PT is positive with respect
to PR. On-hook transmission is enabled. V
BAT1
is applied to entire circuit.
Powerup, Forward Battery.
Normal talk and battery feed state. Pin PT is positive with respect
to PR. On-hook transmission is enabled.
For the L7556 only, V
BAT2
is applied to tip/ring drive amplifiers.
For the L7557 only, the device compares the magnitude of V
BAT2
to the voltage necessary to
maintain proper loop current. Then the device automatically applies V
BAT2
to tip/ring drive am-
plifiers when possible, not affecting the desired dc template.
2-Wire Wink.
Pins PT and PR are put at the same potential (near ground). V
BAT1
is applied to
entire circuit.
Disconnect.
The tip and ring amplifiers are turned off, and the SLIC goes to a high-impedance
state (>100 k
).V
BAT1
is applied to entire circuit.
1
1
0
1
0
1
0
0
1
Pin NLC
Pin NRDET
Pin RGDET
0 = off-hook
1 = on-hook
0 = ring trip
1 = no ring trip
1 = ring ground
0 = no ring ground
Parameter
Symbol
V
CC
V
BAT1
V
BAT2
—
—
T
J
T
stg
R
H
—
V
PT
, V
PR
V
PT
, V
PR
I
RTSP
, I
RTSN
Value
7.0
–63
–63
–0.5 to +7.0
–7.0 to +7.0
165
–40 to +125
5 to 95
±3
(V
BAT1
– 5) to +3
(V
BAT1
– 15) to +15
±240
Unit
V
V
V
V
V
°C
°C
%
V
V
V
μA
5 V Power Supply
Battery (Talking) Supply
Auxiliary Battery Supply
Logic Input Voltage
Analog Input Voltage
Maximum Junction Temperature
Storage Temperature Range
Relative Humidity Range
Ground Potential Difference (BGND to AGND)
PT or PR Fault Voltage (dc)
PT or PR Fault Voltage (10 x 1000 μs)
Current into Ring Trip Inputs
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L7557 | Low-Power SLICs （electronic subscriber loop interface circuits ）with Battery Switch(帶電池開關(guān)的低功耗用戶環(huán)路線接口電路（SLIC）) |
| L7581 | Ringing Access Switch(振鈴存取開關(guān)) |
| L7582 | Ring Access Switch(振鈴存取開關(guān)) |
| L7583B | Line Card Access Switch(線卡存取開關(guān)) |
| L7583C | Line Card Access Switch(線卡存取開關(guān)) |
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|---|---|
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| L755KEYBOARD | 制造商:MCM 功能描述:KEYBOARD L755-S5355 制造商:PREMIER FARNELL 功能描述:KEYBOARD L755-S5355 |
| L7560 | 制造商:HAMAMATSU 制造商全稱:Hamamatsu Corporation 功能描述:High-speed, high output power LED with mini-lens |
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