CPC7593 Datasheet, PDF (14/24 Pages) Clare, Inc. – Line Card Access Switch

CPC7593
1.10 Truth Tables
1.10.1 Truth Table for CPC7593xA and CPC7593xB
State
IN_RINGING IN_TESTin IN_TESTout Latch
T_SD
TESTin
Switches
Break
Switches
Ringing
Test
Switches
Ringing
Switches
TESTout
Switches
Talk
0
0
0
Off
On
Off
Off
Off
TESTout
0
0
1
Off
Off
Off
Off
On
TESTin
0
1
0
On
Off
Off
Off
Off
Simultaneous
TESTin and
0
1
1
0
TESTout
On
Off
Off
Off
On
Ringing
1
0
0
Z¹
Off
Off
Off
On
Off
Ringing
Generator
1
1
0
Test
Off
Off
On
Off
Off
Latched
X
X
X
1
Unchanged Unchanged Unchanged Unchanged Unchanged
1
0
1
0
Off
Off
Off
Off
Off
All-Off
1
1
1
0
Off
Off
Off
Off
Off
X
X
X
X
0
Off
Off
Off
Off
Off
1_{Z = High Impedance. The TSD pin has an internal pull-up resistor, and must be allowed to float for normal thermal shutdown operation. It should be controlled with an open-collector or an open-drain}
device.
1.10.2 Truth Table for CPC7593xC and CPC7593xD
State
IN_RINGING IN_TESTin IN_TESTout Latch
T_SD
TESTin
Switches
Break
Switches
Ringing
Test
Switches
Ringing
Switches
TESTout
Switches
Talk
0
0
0
Off
On
Off
Off
Off
TESTout
0
0
1
Off
Off
Off
Off
On
TESTin
0
1
0
On
Off
Off
Off
Off
Simultaneous
TESTin and
0
1
1
TESTout
On
Off
Off
Off
On
Ringing
1
0
0
Off
Off
Off
On
Off
Ringing
0
Generator
1
1
0
Z¹
Off
Off
On
Off
Off
Test
Simultaneous
TESTout and
Ringing
1
1
1
Generator
Test
Off
Off
On
Off
On
Latched
X
X
X
1
Unchanged Unchanged Unchanged Unchanged Unchanged
1
0
1
0
Off
Off
Off
Off
Off
All-Off
X
X
X
X
0
Off
Off
Off
Off
Off
1_{Z = High Impedance. The TSD pin has an internal pull-up resistor, and must be allowed to float for normal thermal shutdown operation. It should be controlled with an open-collector or an open-drain}
device.
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