參數(shù)資料
型號(hào)： L7583C
廠商： Lineage Power
英文描述： Line Card Access Switch(線卡存取開(kāi)關(guān))
中文描述： 線卡接入交換機(jī)（線卡存取開(kāi)關(guān)）
文件頁(yè)數(shù)： 17/20頁(yè)
文件大小： 404K
代理商： L7583C
Lucent Technologies Inc.
17
Data Sheet
November 1999
L7583A/B/C/D Line Card Access Switch
Application
(continued)
Table 17. Truth Table for L7583C/D
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Simultaneous TESTout—Ring Test state.
If T
SD
= 5 V, the thermal shutdown mechanism is disabled. If T
SD
is floating, the thermal shutdown mechanism is active.
Forcing T
SD
to ground overrides the logic input pins and forces an all OFF state.
Idle/Talk state.
TESTout state.
TESTin state.
Power ringing state.
Ringing generator test state.
Simultaneous TESTout and TESTin state.
All OFF state.
A parallel in/parallel out data latch is integrated into the L7583C/D. Operation of the data latch is controlled by the
logic level input pin LATCH. The data input to the latch is the INPUT pin of the L7583C/D and the output of the data
latch is an internal node used for state control.
When the LATCH control pin is at logic 0, the data latch is transparent and data control signals flow directly from
INPUT, through the data latch to state control. Any changes in INPUT will be reflected in the state of the switches.
When the LATCH control pin is at logic 1, the data latch is active; the L7583C/D will no longer react to changes at
the INPUT control pin. The state of the switches is now latched; that is, the state of the switches will remain as they
were when the LATCH input transitioned from logic 0 to logic 1. The switches will not respond to changes in INPUT
as long as LATCH is held high.
Note that the T
SD
input is not tied to the data latch. T
SD
is not affected by the LATCH input. T
SD
input will override
state control via INPUT and LATCH.
IN
RING
IN
TESTin
IN
TESTout
T
SD
TESTin
Switches
Off
Off
On
Off
Off
On
Off
Off
Off
Break
Switches
On
Off
Off
Off
Off
Off
Off
Off
Off
Ring Test
Switches
Off
Off
Off
Off
On
Off
Off
On
Off
Ring
Switches
Off
Off
Off
On
Off
Off
Off
Off
Off
TESTout
Switches
Off
3
On
4
Off
5
Off
6
Off
7
On
8
Off
9
On
10
Off
9
0 V
0 V
0 V
5 V
5 V
0 V
5 V
5 V
Don’t
Care
0 V
0 V
5 V
0 V
5 V
5 V
0 V
5 V
Don’t
Care
0 V
5 V
0 V
0 V
0 V
5 V
5 V
5 V
Don’t
Care
5 V/Float
1
5 V/Float
1
5 V/Float
1
5 V/Float
1
5 V/Float
1
5 V/Float
1
5 V/Float
1
5 V/Float
1
0 V
2
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