ENHANCED TYPE II CALLER ID DECODER

WITH STUTTER DIAL TONE DETECTOR

NW6006

The IDT logo is a registered trademark of Integrated Device Technology, Inc

INDUSTRIAL TEMPERATURE RANGE

JULY 2002

©2002 Integrated Device Technology, Inc.

DSC-6049/3

FEATURES

•

1200 baud Bell 202 and ITU-T V.23 Frequency Shift Keying

(FSK) Demodulation

•

Stutter dial tone detection

•

Compliant with following specifications:

Bellcore GR-30-CORE & SR-TSV-002476

TIA/EIA-716, TIA/EIA-777 Draft

TIA/EIA PN-4195 Draft

British Telecom (BT) SIN227 & SIN242

ETSI ETS 300 778-1 and -2

•

Bellcore “CPE Alerting Signal (CAS)”, British Telecom “Idle State

and Loop State Tone Alert Signal” and ETSI “Dual Tone Alerting

Signal (DT-AS)” detection

•

Two seperate OP amps with adjustable gain for Tip/Ring and

Telephone Hybrid connections

•

Monitoring of the stop bit for framing error check

•

Serial FSK data interface with selectable output of bit stream or 1

byte buffer

•

FSK carrier detection

•

3 V or 5 V operation

•

Low power CMOS with intelligent powerdown mode

•

Operating temperature range: -40 °C to +85 °C

•

Packages available:

NW6006-XS 20 pin SOIC

(where ‘X’ is the revision ID)

DESCRIPTION

The NW6006 device is a single-chip, 3/5 Volt CMOS caller ID with

call waiting detection circuit. It can receive signals following Bellcore

GR-30-CORE & SR-TSV-002476, BT SIN227 & SIN242, and ETSI

ETS 300 788-1/-2 specifications.

The NW6006 provides 1200 baud Bell 202 and ITU-T V.23 FSK

demodulation, detection in stutter dial tone mode and CAS/DT-AS

detection. Two seperate differential input amplifiers allow the device to

be connected with both Tip/Ring and Telephone Hybrid receive pair.

FSK demodulation is implemented only on Tip/Ring, while DT-AS(or

CAS) detection can be on either Tip/Ring or Hybrid Receive. In

addition, NW6006 provides a serial FSK data interface via which the

data can be selected to be processed as a bit stream or extracted

from a 1 byte built-in buffer. An on-chip Stutter Dial Tone Detector is

provided to support the voice mail applications.

The device can be used in feature or cordless phones with voice

mail for BT Calling Line Identity Presentation (CLIP), CCA CLIP and

Bellcore Calling Identity Delivery (CID) systems. It can also be used in

caller ID boxes, modem, fax machines, answering machines,

database query systems and Computer Telephony Integration (CTI)

systems.

VREF

IN1+

OSCOUT

OSCIN

CB0

CB1 CB2

ST/GT

DR/STD

IN2+

Oscillator

Control Bit Decoder

Bias

Generator

Guard Time

Tone Alert

Detector

FSK

Demodulator

Data/Timing Recovery

+

-

+

-

PWDN

PWDN

CASEN

CASEN

FSKEN

MODE

GS1EN

GS2EN

FSKEN

MODE

GS1EN

GS2EN

SDTEN

Stutter Dial Tone

Detector

SDTEN

Figure 1. Block Diagram

FUNCTIONAL BLOCK DIAGRAM

IN1-

GS1

IN2-

GS2

EST

CD/STRDT

DCLK

DATA