CPC7595 Datasheet, PDF (14/25 Pages) Clare, Inc. – Line Card Access Switch

CPC7595
1.10 Truth Tables
1.10.1 Truth Table for CPC7595xA and CPC7595xB
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
Off
Off
On
Off
Off
Test
Latched
X
X
X
1
Unchanged Unchanged Unchanged Unchanged Unchanged
1
0
1
0
Off
Off
Off
Off
All-Off
1
1
1
0
Off
Off
Off
Off
X
X
X
X
0
Off
Off
Off
Off
y _{1 Z = High Impedance. Because TSD has an internal pull up at this pin, it should be controlled with an open-collector or open-drain type device.}
r _{1.10.2 Truth Table for CPC7595xC}
ina ^State
IN_RINGING IN_TESTin IN_TESTout Latch
T_SD
TESTin
Switches
Break
Switches
Ringing
Test
Switches
Ringing
Switches
Off
Off
Off
TESTout
Switches
Talk
0
TESTout
0
TESTin
0
Simultaneous
TESTin and
0
TESTout
Ringing
1
Ringing
Generator
1
Test
Simultaneous
TESTout and
0
0
Off
0
1
Off
1
0
On
lim ¹
1
On
0
0
Off
0
Pre ¹
0
Z¹
Off
On
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
On
Off
Off
On
Off
On
Off
Off
Ringing
1
1
1
Off
Off
On
Off
On
Generator
Test
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. Because TSD has an internal pull up at this pin, it should be controlled with an open-collector or open-drain type device.}
14
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