CPC7591 Datasheet, PDF (9/19 Pages) Clare, Inc. – Line Card Access Switch

1.9 Protection Circuitry Electrical Specifications
Parameter
Conditions
Protection Diode Bridge
Forward Voltage drop,
continuous current
(50/60 Hz)
Apply ± dc current limit of break
switches
Forward Voltage drop, Apply ± dynamic current limit of break
surge current
switches
Protection SCR (CPC7591xA)
Surge current
-
Trigger current:
SCR activates, +25° C
Current into V_BAT pin. _{SCR activates, +85° C}
Hold current: Current ^{SCR remains active, +25° C}
through protection SCR _{SCR remains active, +85° C}
Gate trigger voltage I_GATE = I_TRIGGER§
Reverse leakage current V_BAT = -48 V
On-state voltage
0.5 A, t = 0.5 μs
2.0 A, t = 0.5 μs
Temperature Shutdown Specifications
Shutdown activation
temperature
Shutdown circuit
hysteresis
Not production tested - limits are
guaranteed by design and Quality
Control sampling audits.
*Passes GR1089 and ITU-T K.20 with appropriate secondary protection in place.
§_{VBAT must be capable of sourcing ITRIGGER for the internal SCR to activate.}
Symbol
V_F
V_F
-
I_TRIG
I_HOLD
V_TBAT or
V_RBAT
I_VBAT
V_TBAT or
V_RBAT
T_{TSD_on}
T_{TSD_off}
Minimum
-
-
-
-
-
110
V_BAT -4
-
-
110
10
Typical
2.1
5
-
65
45
195
130
-
0.2
-3
-5
125
-
CPC7591
Maximum
Unit
3.0
V
-
*
A
-
mA
-
mA
V_BAT -2
V
1.0
μA
-
V
150
°C
25
°C
1.10 Truth Table
State
IN_RINGING
Latch
T_SD
Break
Switches
Ringing Switches
Talk
0
Ringing
1
Latched
X
On
Off
0
Z¹
Off
On
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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