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參數(shù)資料
| 型號： | CPC7582BC |
| 廠商： | CLARE INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO16 |
| 封裝： | ROHS COMPLIANT, SOIC-16 |
| 文件頁數(shù)： | 5/19頁 |
| 文件大?。?/td> | 566K |
| 代理商： | CPC7582BC |
CPC7582
R05
www.clare.com
13
2.2.1 Make-Before-Break Operation - All Versions
To use make-before-break operation, change the logic
inputs to the talk state immediately following the
ringing state. Application of the talk state opens the
ringing return switch (SW3) as the break switches
(SW1 and SW2) close. The ringing switch (SW4)
remains closed until the next zero-crossing of the
ringing supply current. While in the make-before-break
state, ringing potentials in excess of the CPC7582
protection circuitry trigger levels will be diverted to
ground.
2.2.2 Make-Before-Break Operation for All Versions (Ringing to Talk Transition)
2.2.3 Break-Before-Make Operation - CPC7582xA/B
Break-before-make operation of the CPC7582xA/B
can be achieved using two different techniques.
The first method uses manipulation of the INRINGING
and INTEST logic inputs as shown in
1.
At the end of the ringing state apply the all off
state (0, 0). This releases the ringing return
switch (SW3) while the ringing switch remains
on, waiting for the next zero current event.
2.
Hold the all off state for at least one-half of a
ringing cycle to assure that a zero crossing event
occurs and that the ringing switch (SW4) has
opened.
Break-before-make operation occurs when the ringing
switch opens before the break switches (SW1 and
SW2) close.
2.2.4 Break-Before-Make Operation CPC7582xA/B (Ringing to Talk Transition)
2.2.5 Break-Before-Make Operation - All Versions
The second break-before-make method for the
CPC7582xA/B is also the only method available for
the CPC7582xC. As shown in “CPC7582xA/B Truth
State
INRINGING
INTEST LATCH
TSD
Timing
Break
Switches
Ringing
Return
Switch
(SW3)
Ringing
Switch
(SW4)
Test
Switches
Ringing
1
0
Floating
-Off
On
Off
Make-
before-
break
00
SW4 waiting for next zero-current
crossing to turn off. Maximum time is
one-half of the ringing cycle. In this
transition state, current that is limited to
the dc break switch current limit value
will be sourced from the ring node of the
SLIC.
On
Off
On
Off
Talk
0
Zero-cross current has occurred
On
Off
State
INRINGING
INTEST LATCH
TSD
Timing
Break
Switches
Ringing
Return
Switch
(SW3)
Ringing
Switch
(SW4)
Test
Switches
Ringing
1
0
Floating
-Off
On
Off
All-Off
1
Hold this state for at least one-half of the
ringing cycle. SW4 waiting for zero
current to turn off.
Off
On
Off
Break-
Before-
Make
1
SW4 has opened
Off
Talk
0
Close Break Switches
On
Off
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