CPC7591 Datasheet, PDF (9/17 Pages) Clare, Inc. – Line Card Access Switch

INTEGRATED CIRCUITS DIVISION
CPC7591
1.9 Protection Circuitry Electrical Specifications
Parameter
Conditions
Symbol Minimum Typical Maximum
Unit
Protection Diode Bridge
Forward Voltage drop,
continuous current
(50/60 Hz)
Apply ± dc current limit of break
switches
V_F
-
2.1
3.0
V
Forward Voltage drop, Apply ± dynamic current limit of break
surge current
switches
V_F
-
5
-
Protection SCR (CPC7591xA)
Surge current
-
-
-
-
*
A
Trigger current:
SCR activates, +25 C
Current into V_BAT pin. _{SCR activates, +85 C}
I_TRIG
-
65
45
-
mA
Hold current: Current ^{SCR remains active, +25 C}
through protection SCR _{SCR remains active, +85 C}
-
195
I_HOLD
110
130
-
mA
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
-
0.2
1.0
A
On-state voltage
0.5 A, t = 0.5 s
2.0 A, t = 0.5 s
V_TBAT or
V_RBAT
-
-3
-5
-
V
Temperature Shutdown Specifications
Shutdown activation
temperature
Not production tested - limits are
T_{TSD_on}
110
125
150
C
guaranteed by design and Quality
Shutdown circuit
hysteresis
Control sampling audits.
T_{TSD_off}
10
-
25
C
*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.}
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.}
R06
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