CPC7582BC Clare, CPC7582BC Datasheet - Page 14

• Manufacturer Part Number: CPC7582BC
• Description: SWITCH LINE CARD ACCESS 16-SOIC
• Manufacturer: Clare

Specifications of CPC7582BC

• Function: Line Card Access Switch
• Number Of Circuits: 1
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 1.3mA
• Power (watts): 10mW
• Operating Temperature: -40°C ~ 110°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Includes: Bounce-Free Switching, Switch Timing, Tertiary Protector
• Relay Type: Line Card
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -

CPC7582
the CPC7582 switches when pulled to a logic low.
Although logically disabled, if the ringing switch (SW4)
is active (closed), it will remain closed until the next
current zero crossing event.
As shown in the table “Break-Before-Make Operation
for all Version (Ringing to Talk Transition)” on page 14,
this operation is similar to the one shown in
“Break-Before-Make Operation - All Versions” on
page 13, except in the method used to select the all off
state, and in when the IN
are reconfigured for the talk state.
1. Pull T
2. Keep T
2.3 Data Latch
The CPC7582 has an integrated data latch. The latch
operation is controlled by logic-level input pin 11
(LATCH). The data input of the latch is pin 10
(IN
output of the data latch is an internal node used for
state control. When LATCH control pin is at logic 0, the
data latch is transparent and data control signals flow
directly through to state control. A change in input will
be reflected in the switch state. When LATCH control
pin is at logic 1, the data latch is active and a change
in input control will not affect switch state. The
switches will remain in the position they were in when
the LATCH changed from logic 0 to logic 1 and will not
respond to changes in input as long as the latch is at
logic 1. The T
Therefore, T
the T
14
Ringing
Before-
Break-
All-Off
State
Make
Talk
RINGING
This opens the ringing return switch (SW3) and
prevents any other switches from closing.
the ringing cycle period to allow sufficient time for
a zero crossing current event to occur and for the
2.2.6 Break-Before-Make Operation for all Version (Ringing to Talk Transition)
SD
input will override state control.
SD
IN
) and pin 9 (IN
SD
RINGING
SD
to a logic low to end the ringing state.
SD
1
0
0
0
low for at least one-half the duration of
is not affected by the LATCH input and
input is not tied to the data latch.
IN
TEST
0
0
0
0
RINGING
TEST
) of the device while the
LATCH
0
and IN
Floating
Floating
T
TEST
SD
0
inputs
Hold this state for at least one-half of the
ringing cycle. SW4 waiting for zero
current to turn off.
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Close Break Switches
SW4 has opened
Timing
3. During the T
4. Release T
When using T
states are 0 (overrides logic input pins and forces an
all off state) and float (allows switch control via logic
input pins and the thermal shutdown mechanism is
active). This requires the use of an open-collector type
buffer.
Forcing T
shutdown circuit and is therefore not recommended as
this could lead to device damage or destruction in the
presence of excessive tip or ring potentials.
2.4 Thermal Shutdown
Setting T
logic inputs. This setting, however, also disables the
thermal shutdown circuit and is therefore not
recommended. When using logic controls via the input
pins, pin 7 (T
result, the two recommended states when using pin 7
(T
all-off state, or float, which allows logic inputs to
remain active. This requires the use of an
open-collector type buffer.
2.5 Ringing Switch Zero-Cross Current Turn Off
After the application of a logic input to turn SW4 off,
the ringing switch is designed to delay the change in
state until the next zero-crossing. Once on, the switch
requires a zero-current cross to turn off, and therefore
should not be used to switch a pure DC signal. The
-
SD
circuit to enter the break before make state.
IN
activate the break switches.
) as a control are 0, which forces the device to the
TEST
SD
SD
inputs to the talk state (0, 0).
to +5 V allows switch control using the
to a logic high disables the thermal
SD
SD
SD
) should be allowed to float. As a
SD
, allowing the internal pull-up to
as an input, the two recommended
Switches
Break
low period, set the IN
Off
Off
Off
On
Ringing
Return
Switch
(SW3)
On
Off
Off
Off
Ringing
Switch
(SW4)
On
On
Off
Off
RINGING
Switches
Test
Off
Off
Off
Off
and
R05