12

Am7953X Data Sheet

11. Tested with 0

Ω source impedance. 2 MΩ is specified for system design purposes only.

the group delay to less than 2

µs. The effect of group delay on linecard performance may be compensated for by using

QSLAC™ or DSLAC™ devices.

Note:

* For the Am79534 and Am79535, a logic Low on E0 disables the DET output into the open-collector state.

Table 1.

SLIC Decoding

DET Output (E0 = 1*)

State

C3 C2 C1

Two-Wire Status

E1 = 0

E1 = 1

0

0

0

1

Open Circuit

Ring trip

Ring trip

1

0

0

1

Ringing

Ring trip

Ring trip

2

0

1

0

Active

Loop detector

Ground key

3

0

1

1

On-hook TX (OHT)

Loop detector

Ground key

4

1

0

0

Tip Open

Loop detector

—

5

1

0

1

Reserved

Loop detector

—

6

1

1

0

Active Polarity Reversal

Loop detector

Ground key

7

1

1

1

OHT Polarity Reversal

Loop detector

Ground key