CPC7583

12

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R06

1.8 Protection Circuitry Electrical Specifications

1.9 Truth Tables

1.9.1 Truth Table for CPC7583xA and CPC7583xB

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

-2.8

3.5

V

Voltage drop at surge

current

Apply ± dynamic current limit of break

switches

Forward

Voltage

-5-

Parameters Related to the Protection SCR (CPC7583xA and CPC7583xC)

Surge current

-

-

-

*

A

Trigger current

+25° C

-

200

-

mA

+85° C

120

-

Hold current

+25° C

265

-

+85° C

100

170

-

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

Switches

Break

Switches

Ringing

Test

Switches

Ringing

Switches

Switches

Talk

000

0

1 or

Off

On

Off

Off

Off

TESTout

0

0

1

Off

Off

Off

Off

On

TESTin

010

On

Off

Off

Off

Off

Simultaneous

TESTin and

TESTout

011

On

Off

Off

Off

On

Ringing

1

0

0

Off

Off

Off

On

Off

Ringing

Generator

Test

110

Off

Off

On

Off

Off

Latched

X

X

X

1

Unchanged Unchanged Unchanged Unchanged Unchanged

All Off

1

0

1

0

Off

Off

Off

Off

Off

1

1

1

0

Off

Off

Off

Off

Off

XXX

X

Off

Off

Off

Off

Off