L9217G Просмотр технического описания (PDF) - Agere -> LSI Corporation

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L9217G

Low-Cost Line Interface with Reverse Battery and PPM

Agere -> LSI Corporation 

L9217A/G Low-Cost Line Interface

with Reverse Battery and PPM

Pin Information

Data Sheet

November 2001

4

3

2

1

28 27 26

RCVP 5

25 VTX

RCVN 6

24 TXI

LCTH 7

23 VITR

DCOUT 8

28-PIN PLCC

22 NSTAT

VBAT

9

21 PPMIN

PR 10

20 RTSP

CF2 11

19 RTSN

12 13 14 15 16 17 18

Figure 2. 28-Pin PLCC

12-3558 (F).c

Table 1. Pin Descriptions

PLCC

1

2

3

4

5

6

Symbol

IPROG

FB2

FB1

VCC

RCVP

RCVN

Type

I

—

—

—

I

I

Description

Current-Limit Program Input. A resistor to DCOUT sets the dc current limit of the

device.

Polarity Reversal Slowdown. Connect a capacitor to ground to control the rate of bat-

tery reversal.

Polarity Reversal Slowdown. Connect a capacitor to ground to control the rate of bat-

tery reversal.

5 V Power Supply.

Receive ac Signal Input (Noninverting). This high-impedance input controls the ac

differential voltage on tip and ring.

Receive ac Signal Input (Inverting). This high-impedance input controls the ac differ-

ential voltage on tip and ring.

4

Agere Systems Inc.

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