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LUCL9313AP

Line Interface and Line Access Circuit Full-Feature SLIC and Ringing Relay for TR-57 Applications

Agere -> LSI Corporation 

Data Sheet

September 2001

L9313 Line Interface and Line Access Circuit

Full-Feature SLIC and Ringing Relay for TR-57 Applications

Pin Information (continued)

Table 1. Pin Descriptions (continued)

Pin Symbol Type

Name/Function

8

FB1

— Polarity Reversal Slowdown Capacitor. Connect a capacitor from this node to ground

to control the rate of battery reversal. If controlled battery reversal is not desired, leave

pin is open.

9

LCF

— Loop Closure Filter Capacitor. PPM injection can cause false loop closure indication.

Connect a capacitor from this node to VCC to filter the loop closure detector. If loop clo-

sure filtering is not required, leave this node open.

10 BGND G Battery Ground. Ground return for the battery supply.

11 RPWR

P Auxiliary Battery. If a lower-voltage auxiliary battery is used, connect the auxiliary bat-

tery supply to this node. If a power control resistor is used, connect the power control

resistor from this node to VBAT1. If no power control technique is used, connect this node

to VBAT1.

12

VBAT1

P Office Battery Supply. Negative high-voltage power supply.

13

VBAT1

P Office Battery Supply. Negative high-voltage power supply.

14 BGND G Battery Ground. Ground return for the battery supply.

15 TIE B’ — Connect to VREF.

16 TIE A’ — Connect to VREF.

17

NC

18

38

— No Connect. May not be used as a tie point.

19 RTS

I Ring Trip Sense. Sense input for the ring trip detector.

20 RSW

O Ring Lead Ringing Access Switch. Ringing relay connects this pin to pin RRING.

Connect this pin to pin PR through a 400 Ω current-limiting resistor.

21 RRING

I Ringing Access. Input to solid-state ringing access switch. Connect to ringing genera-

tor.

22

PR

I/O Protected Ring. The output of the ring driver amplifier and input to loop sensing con-

nected through solid-state break switch. Connect to subscriber loop through overvolt-

age/current protection.

23

PT

I/O Protected Tip. The output of the tip driver amplifier and input to loop sensing con-

nected through solid-state break switch. Connect to subscriber loop through overvolt-

age/current protection.

24 TRING

O Tip Ringing Return. Ring relay connects this pin to PT. Connect to ringing supply

return.

25 NSTAT

O Loop Status. The output of the loop status detector (loop start detector wired-OR with

ring trip detector). This loop status supervision output is not controlled by the data latch.

26 DGND G Digital Ground.

27

B2

I Data Control Input. See Table 2, Control States for details.

28

B1

I Data Control Input. See Table 2, Control States for details.

29

B0

I Data Control Input. See Table 2, Control States for details.

30 RESET

I Reset. A logic low will override the B[0:3] and LATCH inputs and reset the state of the

SLIC to the disconnect state and the switch to the all-off state.

31 LATCH I Latch Control Input. Edge-level sensitive control for data latches.

32

VDD

P 5 V Digital Power Supply. 5 V supply for digital circuitry.

33 DGND G Digital Ground. Ground return for VDD current.

34 RGDET

O Ring Ground Detect. When high, this open collector output indicates the presence of a

ring ground or a tip ground. This supervision output may be used in ground start or

common-mode fault detection applications. It has an internal pull-up.

Agere Systems Inc.

9

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