UBA1702AT datasheet(2/24 Pages) PHILIPS

2 / 24 page

1997 Sep 29

Philips Semiconductors

Product speciﬁcation

Line interrupter driver and ringer

UBA1702; UBA1702A

FEATURES

Speech part

• Driver for the line interrupter that can be either a PMOST

when UBA1702 is used or a PNP when UBA1702A is

used

• Adjustable over-current protection

• Adjustable over-voltage protection for transmission

circuit

• Adjustable mute (dialling mode voltage; DMO or NSA)

• Adjustable current loop detection (hook switch status)

• Microcontroller supply

• Provision for electronic hook switch.

Ringer part

• Over-voltage protection

• Ringer frequency output for frequency discrimination

• Adjustable ringer threshold for piezo-driver enable

• Three bits ringer volume control

• Bridge-tied-load (BTL) output stage for piezo transducer

• Fast start-up microcontroller supply.

Miscellaneous

• Separated ground pins for transmission circuit interface

and control signals (e.g. for TEA1064A)

• Possibility to supply the microcontroller with an external

voltage source.

APPLICATIONS

• Telephone sets with software controlled ringer function

• Telephone sets with electronic hook switch.

GENERAL DESCRIPTION

The UBA1702; UBA1702A performs the high voltage

interface and ringer functions of the corded analog

telephone set in close cooperation with a microcontroller

and transmission circuit.

The UBA1702; UBA1702A incorporates several

protections, a driver for the line interrupter and a ringer.

Because of the practical division of functions between the

microcontroller, the transmission circuit and the UBA1702;

UBA1702A, it is possible to have a higher integration level

thereby reducing significantly the number of discrete

components in a telephone set.

ORDERING INFORMATION

TYPE NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

UBA1702

DIP28

plastic dual in-line package; 28 leads (600 mil)

SOT117-1

UBA1702A

DIP28

plastic dual in-line package; 28 leads (600 mil)

SOT117-1

UBA1702T

SO28

plastic small outline package; 28 leads; body width 7.5 mm

SOT136-1

UBA1702AT

SO28

plastic small outline package; 28 leads; body width 7.5 mm

SOT136-1

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