CPC7581

R05

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9

1.8 Protection Circuitry Electrical Specifications

1.9 Truth Table

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

current

Apply ± dynamic current limit of break

switches

Forward

Voltage

-5-

Parameters Related to the Protection SCR

Surge current

-

-

-

-

*

A

Trigger current

T=+25°C

-

60

(CPC7581xA)

70

(CPC7581xC)

-mA

T=+85°C

35

(CPC7581xA)

40

(CPC7581xC)

Hold current

T=+25°C

110

(CPC7581xA)

135

(CPC7581xC)

T=+85°C

60

(CPC7581xA)

110

(CPC7581xC)

70

(CPC7581xA)

115

(CPC7581xC)

Gate trigger voltage

-

V

--

1.0

μA

On-state voltage

0.5 A, t = 0.5

μsV

--3-

V

2.0 A, t = 0.5

μs-

-5

-

V

*Passes GR1089 and ITU-T K.20 with appropriate secondary protection in place.

State

Latch

Break

Switches

Ringing Switches

Talk

0

0

On

Off

Ringing

1

Off

On

Latched

X

1

Unchanged

All-Off

X

X

0

Off

Off