CPC7581_1 Datasheet, PDF (9/17 Pages) Clare, Inc. – Line Card Access Switch

CPC7581
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
continuous current (50/
60 Hz)
Apply ± dc current limit of break
switches
Forward
Voltage
-
2.1
3
V
Voltage drop at surge Apply ± dynamic current limit of break
current
switches
Forward
Voltage
-
5
-
Parameters Related to the Protection SCR
Surge current
-
-
-
-
*
A
Trigger current
Hold current
T=+25°C
T=+85°C
T=+25°C
T=+85°C
60
(CPC7581xA)
70
(CPC7581xC)
I_TRIG
35
-
(CPC7581xA)
40
(CPC7581xC)
-
mA
110
(CPC7581xA)
135
I_HOLD
(CPC7581xC)
60
70
(CPC7581xA) (CPC7581xA)
110
115
(CPC7581xC) (CPC7581xC)
Gate trigger voltage I_GATE = I_TRIGGER**
V_TBAT or
V_RBAT
V_BAT -4
-
V_BAT -2
V
Reverse leakage current V_BAT = -48 V
I_VBAT
-
-
1.0
μA
On-state voltage
0.5 A, t = 0.5 μs
2.0 A, t = 0.5 μs
V_TBAT or
-
-3
-
V
V_RBAT-
-
-5
-
V
*Passes GR1089 and ITU-T K.20 with appropriate secondary protection in place.
**V_BAT must be capable of sourcing I_TRIGGER for the internal SCR to activate.
1.9 Truth Table
State
IN_RINGING
Latch
T_SD
Break
Switches
Ringing Switches
Talk
0
Ringing
1
On
Off
0
Z¹
Off
On
Latched
X
1
Unchanged
All-Off
X
X
0
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.}
R05
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