CPC7583
1.8 Protection Circuitry Electrical Specifications
Parameter
Conditions
Symbol
Minimum
Typical
Maximum
Unit
Parameters Related to the Diodes in the Diode Bridge
Voltage drop at
Apply dc current limit of break
continuous current
switches
Forward
Voltage
-
-
2.8
5
3.5
-
(50/60 Hz)
V
Voltage drop at surge Apply dynamic current limit of break
switches
Forward
Voltage
current
Parameters Related to the Protection SCR (CPC7583xA and CPC7583xC)
Surge current
-
-
-
-
*
-
-
-
-
A
I
I
+25° C
+85° C
+25° C
+85° C
200
120
265
170
TRIG
TRIG
Trigger current
mA
I
I
HOLD
HOLD
Hold current
100
V
or
TBAT
§
V
-4
V
-2
Gate trigger voltage
Reverse leakage current
On-state voltage
-
V
I
= I
GATE TRIGGER
BAT
BAT
V
RBAT
V
= -48 V
I
-
1.0
μA
V
BAT
VBAT
-
0.5 A, t = 0.5 μs
2.0 A, t = 0.5 μs
V
or
-3
-5
-
-
TBAT
V
V
RBAT
*Passes GR1089 and ITU-T K.20 with appropriate secondary protection in place.
§
BAT
V
must be capable of sourcing I
for the internal SCR to activate.
TRIGGER
1.9 Truth Tables
1.9.1 Truth Table for CPC7583xA and CPC7583xB
Ringing
Test
Switches
TEST
TEST
Break
Switches
Ringing
Switches
IN
OUT
IN
IN
IN
T
SD
State
Latch
RINGING
TESTIN
TESTOUT
Switches
Switches
Talk
0
0
0
0
0
1
0
1
0
Off
Off
On
On
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
TESTout
TESTin
Simultaneous
TESTin and
TESTout
0
1
1
1
0
1
1
0
0
On
Off
Off
Off
Off
Off
Off
Off
On
Off
On
Off
On
Off
Off
0
1 or
Ringing
1
Floating
Ringing
Generator
Test
Latched
X
1
1
X
X
0
1
X
X
1
1
X
1
0
0
X
Unchanged Unchanged Unchanged Unchanged Unchanged
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
All Off
2
0
1
2
If T is tied high, thermal shutdown is disabled. If T is left floating, the thermal shutdown mechanism functions normally.
SD SD
Forcing T to ground overrides the logic input pins and forces an all off state.
SD
12
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