PBL3766N Ericsson Microelectronics, PBL3766N Datasheet

PBL3766N

Manufacturer Part Number

PBL3766N

Description

DIP-22

Manufacturer

Ericsson Microelectronics

Datasheet

1.PBL3766N.pdf (18 pages)

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Description

The PBL 3766 Subscriber Line Interface Circuit (SLIC) is a monolithic integrated

circuit, manufactured in 75 V bipolar technology. The PBL 3766 SLIC facilitates the

design of cost effective, high performance on-premises (ONS) analog line interface

cards for PABX systems and terminal adapters. Small package size and few

required external components result in a miniaturized design.

battery supply voltages between -24 V and -58 V.

ring relay driver.

i.e. the hybrid function, is provided by the SLIC in conjunction with either a conven-

tional or a programmable CODEC/filter.

j-leaded chip carrier (PLCC).

balance, output offset voltage, and insertion loss.

Figure 1. Block diagram. Pin numbers PLCC/DIP.

The PBL 3766 programmable, constant current loop feed system can operate with

The SLIC incorporates loop current and ring trip detection functions as well as a

The two- to four-wire and four- to two-wire voice frequency (vf) signal conversion,

The PBL 3766 package is a 22 pin, plastic dual-in-line (batwing) or a 28-pin, plastic

The differences between PBL 3766 and PBL 3766/6 are the specifications for

RINGX

VBAT

TIPX

GND

HPR

VCC

VEE

HPT

18/13

27/21

4/2

3, 6, 10, 17, 24/

5, 6, 17, 18

2/1

23/20

20/15

28/22

21/16

Two-wire

Interface

Transmission

Loop Current

Suppression

Longitudinal

Line Feed

VF Signal

Controller

Ring Trip

Detector

Signal

and

Decoder and

Input/Output

Ring Relay

Control

Driver

PBL 3766, PBL 3766/6

1 /

1 1

/ 4

1 /

3 /

9 /

7 /

8 /

1 1

4 /

RINGRLY

DET

RDC

RSG

VTX

RSN

Interface Circuit

Subscriber Line

Key Features

• Low cost

• Few external components

• Programmable, constant current loop

• Line feed characteristics independent

• -24 V to -58 V battery supply voltage

• Detectors

• Ring relay driver

• Hybrid function with conventional or

• Line terminating impedance, complex

• Idle noise typ. -83 dBmp, typ. 7 dBrnC

• Low on-hook power dissipation:

• Tip-ring open circuit state for

• On-hook transmission

feed

of battery supply variations

range

– programmable loop current detector

– ring trip detector

programmable CODEC/filters

or real, set by a simple external

network or controlled by a

programmable CODEC/filter

20 mW @ -28 V, 35 mW @ -48 V

subscriber loop power denial

September 1997

4-1

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