PBL 386 40/2

8

Pin Description

Figure 8. Pin configuration, 24-pin SOIC, 24-pin SSOP and 28 pin PLCC package, top view.

Refer to figure 8.

PLCC

Symbol

Description

1

PTG

Prog. Transmit Gain. Left open transmit gain = 0.0 dB, connected to AGND transmit gain = -6.02 dB.

2

RRLY

Ring Relay driver output. The relay coil may be connected to maximum +14V.

3

HP

Connection for High Pass filter capacitor, C

4NC

No internal Connection

5

RINGX

The TIPX and RINGX pins connect to the tip and ring leads of the two-wire interface via overvoltage

protection components and ring relay (and optional test relay).

6

BGND

Battery Ground, should be tied together with AGND.

7

TIPX

The TIPX and RINGX pins connect to the tip and ring leads of the two-wire interface via overvoltage

protection components and ring relay (and optional test relay).

8

VBAT

Battery supply Voltage. Negative with respect to AGND.

9

VBAT2

An optional second (2) Battery Voltage connects to this pin.

10

PSG

Programmable Saturation Guard. The resistive part of the DC Feed characteristic is programmed by a

resistor connected from this pin to VBAT.

11

NC

No internal Connection

12

LP

Connection for Low Pass filter capacitor, C

13

DT

Input to the ring trip comparator. With DR more positive than DT the detector output, DET, is at logic level

low, indicating off-hook condition. The external ring trip network connects to this input.

14

DR

Input to the ring trip comparator. With DR more positive than DT the detector output, DET, is at logic

level low, indicating off-hook condition. The external ring trip network connects to this input.

1

2

3

4

5

6

7

8

9

10

11

24

23

22

21

20

19

18

17

16

15

14

RRLY

PTG

HP

RINGX

BGND

TIPX

VBAT

LP

POV

VTX

AGND

C2

RSN

REF

PLD

VCC

C1

DT

PSG

PLC

VBAT2

DET

12

13

DR

C3

24-pin SOIC

and

24-pin SSOP

5

6

7

8

9

10

11

25

24

23

22

21

20

19

BGND

TIPX

VBAT

VBAT2

PSG

NC

NC

PLD

POV

PLC

REF

NC

VCC

RINGX

28-pin PLCC