SA2532KB Ver la hoja de datos (PDF) - South African Micro Electronic Systems

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componentes Descripción

Fabricante

SA2532KB

SINGLE CHIP TELEPHONE FOR INDIA

South African Micro Electronic Systems 

sames

SA2532KA/B

SINGLE CHIP

TELEPHONE FOR INDIA

Key Features

• Speech Circuit, LD/MF Dialler and Tone Ringer

on one 28 pin CMOS chip

• Low Noise

• 31 digit Last Number Redial

• Line Loss Compensation selectable by pin

option

• 2 Timed Break Recall keys

• Moving Cursor protocol with comparison

• On chip MF filter (CEPT CS 203 compatible)

• Pause key for auto pause or wait function

• Power down mode

• Ring frequency discrimination

• Selectable Loop-Disconnect or DTMF dialling

modes

• Real or complex impedance programmable

• Soft Clipping to avoid harsh distortion

• Uses inexpensive 3.58MHz ceramic resonator

• Operating range from 13 to 100 mA

• 3 Tone melody generator

Block Diagram

General Description

The SA2532K is a CMOS integrated circuit that

contains all the functions needed to form a high

performance electronic telephone.

The device incorporates LD/MF repertory dialling,

melody generation, ring frequency discrimination

and a high quality speech circuit.

Soft switch into temporary MF mode using * when

LD mode is selected .Timed Break Recall will be

available in both LD and MF dialling modes.

A 31 digit Last Number Redial (LNR) memory, with

moving cursor protocol, activated by single key

depression.

Line Loss Compensation whereby send and receive

gains are adjusted (by 6dB) over the ranges

selected by the LLC pin.

DAT_SH02

+

+

LI

LS

STB

RI

CS

BJT

LINE

CURRENT

SENSE

VDD

VDD

VSS

SA2532K

SOFT

CLIP

AGND

RO1

RO2

+

M1

M2

MO

MELODY

TONE

SEQUENCER

GENERATOR

MUTE

R4

R3

DIALER

R2

FC1

RING

FREQUENCY

CONTROL

LOGIC

OSC RAM

R1

DISCRIMINATION

+

HS/DP MODE LLC OSC

MODE_OUT C1 C2 C3 C4

KEYPAD

+

PDS039-SA2532K-001 Rev. C 20-03-00

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