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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
+
-
+
-
Mux
PWDN
CASEN
FSKEN
MODE
GS1EN
GS2EN
FSKEN
MODE
GS1EN
GS2EN
SDTEN
Stutter Dial Tone
Detector
SDTEN
Mux
Figure 1. Block Diagram
FUNCTIONAL BLOCK DIAGRAM
IN1-
GS1
IN2-
GS2
EST
CD/STRDT
DCLK
DATA
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