CPC7593MCTR IXYS, CPC7593MCTR Datasheet - Page 17

• Manufacturer Part Number: CPC7593MCTR
• Manufacturer: IXYS

Specifications of CPC7593MCTR

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Break-before-make operation of the CPC7593 can be
achieved using two different techniques.
The first method uses manipulation of the (IN
IN
“Break-Before-Make Operation Logic Table (Ringing to Talk
Transition)” on page
1. At the end of the ringing state apply the all-off
The second break-before-make method is also
available for use with all versions of the CPC7593. As
shown in
R02
* For the CPC7593xA/B versions the input pattern (1,1,1) may also be used for the all-off state.
Ringing
Ringing
Before-
Before-
All-off
Make
Break-
Make-
Break
State
State
TESTin
Talk
Talk
2.3.4 Make-Before-Break Operation Logic Table (Ringing to Talk Transition)
2.3.5 Break-Before-Make Operation
state (1,0,1). This releases the ringing return
switch (SW3) while the ringing switch remains on
waiting for the next zero current event.
2.3.6 Break-Before-Make Operation Logic Table (Ringing to Talk Transition)
2.3.7 Alternate Break-Before-Make Operation
*
*
, IN
“Truth Table for CPC7593xA and CPC7593xB” on
IN
IN
RINGING
RINGING
TESTout
1
0
0
1
1
1
0
) logic inputs as shown in
17.
IN
IN
TESTin
TESTin
0
0
0
0
0
0
0
IN
IN
TESTout
TESTout
0
0
0
0
1
1
0
Latch
Latch
0
0
RINGING
T
T
Z
Z
www.clare.com
SD
SD
,
off. Maximum time is one-half
transition state, current that is
sourced from the ring node of
limited to the break switch dc
SW4 waiting for zero current
zero-current crossing to turn
Zero current has occurred.
of the ringing cycle. In this
Hold this state for at least
current limit value will be
one-half of ringing cycle.
Zero-cross current has
Break switches close.
SW4 waiting for next
SW4 has opened
2. Hold the all-off state for at least one-half of a
3. Apply inputs for the next desired state. For the
Break-before-make operation occurs when the ringing
switch opens before the break switches SW1 and
SW2 close.
page 14
on page
of the CPC7593 switches when pulled to a logic low.
to turn off.
the SLIC.
occurred
Timing
Timing
ringing cycle to assure that a zero crossing event
occurs and that the ringing switch (SW4) has
opened.
talk state, the inputs would be (0,0,0).
-
-
and
14, the bi-directional T
“Truth Table for CPC7593xC and CPC7593xD”
Switches
Switches
Break
Break
Off
On
On
Off
Off
Off
On
Ringing
Ringing
Return
Switch
Return
Switch
(SW3)
(SW3)
SD
On
Off
Off
On
Off
Off
Off
interface disables all
Ringing
Ringing
Switch
Switch
(SW4)
(SW4)
On
On
Off
On
On
Off
Off
CPC7593
Switches
Switches
Test
Test
Off
Off
Off
Off
Off
Off
Off
17