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PDF ( 数据手册 , 数据表 ) NW6006

零件编号 NW6006
描述 ENHANCED TYPE II CALLER ID DECODER WITH STUTTER DIAL TONE DETECTOR
制造商 Integrated Device Technology
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NW6006 数据手册, 描述, 功能
ENHANCED TYPE II CALLER ID DECODER
WITH STUTTER DIAL TONE DETECTOR
NW6006
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.
FUNCTIONAL BLOCK DIAGRAM
OSCOUT OSCIN
CB0 CB1 CB2
VREF
IN1+
IN1-
GS1
IN2+
IN2-
GS2
Oscillator
Bias
Generator
PWDN
GS1EN
+
-
+
-
GS2EN
Control Bit Decoder
SDTEN
PWDN FSKEN GS1EN
CASEN MODE
GS2EN
Tone Alert
Detector
CASEN
FSK
Demodulator
FSKEN
Figure 1. Block Diagram
SDTEN
Stutter Dial Tone
Detector
Guard Time
Data/Timing Recovery
MODE
ST/GT
DR/STD
EST
CD/STRDT
DCLK
DATA
The IDT logo is a registered trademark of Integrated Device Technology, Inc
INDUSTRIAL TEMPERATURE RANGE
©2002 Integrated Device Technology, Inc.
JULY 2002
DSC-6049/3







NW6006 pdf, 数据表
NW6006 ENHANCED TYPE II CALLER ID DECODER
WITH STUTTER DIAL TONE DETECTOR
FSK CARRIER DETECTION
The carrier detector detects the presence of a signal of sufficient
amplitude at the output of the FSK bandpass filter. If the signal is
qualified by a digital algorithm, it set the CD output to low indicating a
successful carrier detection. NW6006 supplies a 10 ms hysteresis to
allow for momentary signal drop out once CD has been activated.
When there is no activity at the FSK bandpass filter output for 10 ms,
CD is released.
When CD is inactive (high), the raw output of the FSK
demodulator is ignored by the FSK data output interface. In mode‘0’,
the DATA pin is forced high. In mode ‘1’, the internal shift register is not
updated. If DCLK is clocked, DATA is undefined.
Since signals such as DT-AS, DTMF tones and speech are within
the FSK frequency band and thus may activate the carrier detector.
The NW6006 should be put into DT-AS or power down mode when
FSK is not expected to avoid false carrier detection and false
demodulation.
INDUSTRIAL TEMPERATURE RANGE
(a) Connection of One Device with Crystal Oscillator
NW6006
OSCIN OSCOUT
3.579545MHz
(b) Common Crystal Connection of Several Devices
Sharing One Timing Source
NW6006
NW6006
NW6006
OSCIN OSCOUT OSCIN OSCOUT OSCIN OSCOUT
3.579545MHz
to the next device
Figure 8. Applicaiton of Clock Driven Circuit
OTHER FUNCTIONS
APPLICATION NOTE
Power-down Mode
The device provides the power-down feature to reduce the power
consumption. Power-down can be activated by setting Control Bits 0-2
to ‘100’. Note that momentary transition of CB0-2 into the power-down
code won’t activate power-down but will reset the device.
CONTROL BITS PROGRAMMING
Functionality of the NW6006 can be selected by coding CB0-CB2,
as shown in Table 2.
Table 2. Control Bits Programming
In this mode, both input OP amps, reference voltage and the
Functionality Group
CB0 CB1 CB2
oscillator are non functional. When the device is in power-down, DATA, FSK Demodulation Mode 0
011
DR/STD, CD/STRDT are high; EST and ST/GT are low.
FSK Demodulation Mode 1
111
Hybrid DT-AS Detection with Stuttered 1 1 0
An intelligent Power-down feature is implemented to further reduce
the operating current. When FSK is selected, DT-AS detector and
Stuttered Dial Tone Detection are powered down. When DT-AS and
STRDT are selected, FSK demodulator is powered down. The Tip/
Dial Tone Detection
Hybrid DT-AS Detection Only
Tip/Ring DT-AS Detection with Stuttered
Dial Tone Detection
Tip/Ring DT-AS Detection Only
0
1
0
1
0
0
0
1
1
Ring and Hybrid input OP amps are not affected in the intelligent Power Down
100
Power-down.
Factory Test Only
000
Crystal Oscillator
A 3.579545 MHz crystal oscillator or other external clock source is
required for NW6005. The crystal can be directly connected between
OSCIN and OSCOUT pins without any external component. If an
external clock source is used, OSCIN pin should be driven by the
clock source and OSCOUT pin is left floating or is used to drive other
devices. Fig. 8 shows some applications.
HYBRID CONNECTION
To optimize the device’s talkdown and talkoff performance, Hybrid
connection is recommended. There are two Op Amps in NW6006
which bring convenience for Hybrid connection. When connected to
the Hybrid Op Amp, the Hybrid circuit will attenuate the speech signal
at least 9 dB from the microphone to the speaker, which leads a much
better performance of near-end talkdown and talkoff.
It is highly recommended to demodulate the FSK signal using the
Tip/Ring OP Amp and to detect the CAS signal using the Hybrid OP
Amp. This implementation brings not only optimized talkdown and
talkoff performance, but also the convenience to adjust FSK and CAS
sensitivity separately.
8







NW6006 equivalent, schematic
NW6006 ENHANCED TYPE II CALLER ID DECODER
WITH STUTTER DIAL TONE DETECTOR
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS (CONTINUED)
Parameter
IOL
Iin1
Iin2
IOZ1
VREF
RREF
VTGT
Pin
DCLK, DATA
DR/STD, CD
EST, ST/GT
IN1+, IN1-
IN2+, IN2-
DCLK
CB0, CB1, CB2
ST/GT
VREF
ST/GT
Description
Output Low Sinking
Current
Input Current
Input Current
Output High Impedance
Output Voltage
Output Resistance
Comparator Threshold
Voltage
Min Typ Max Units Test Conditions
2 mA VOL = 0.1VCC
0.5VCC-0.1
0.5VCC-0.05
1 µA
10 µA Vin = VCC to GND
5 µA Vout = VCC to GND
0.5VCC+0.1
V No Load
2 k
0.5VCC+0.05 V
AC ELECTRICAL CHARACTERISTICS
DUAL TONE ALERT SIGNAL DETECTION
Parameter
Description
Min Typ Max Units
Notes
FL Low Tone Frequency
FH High Tone Frequency
FDA Frequency Deviation Accept
2130
2750
1.1%
Hz Nominal frequency
Hz Nominal frequency
Within this range, tones are accepted.
FDR Frequency Deviation Reject
3.5%
Outside this range, tones are rejected.
SIGAC
Accept Signal Level per tone
-40
-2 dBV Input op amp configured to 0 dB gain for
SIGRJ
Reject Signal Level per tone
(VCC = 5 V ± 10%, 3 V ± 10%)
5 V operation, gain for 3 V operation is
-47 dBV TBD. Signal level is per tone.
TA Positive and Negative Twist Accept #
7 dB
SNR Signal to Noise Ratio ##
20
dB
STUTTER DIAL TONE SIGNAL DETECTION
Parameter
Description
Min Typ Max Units
Notes
FL Low Tone Frequency
FH High Tone Frequency
Frequency Deviation Accept
FDA High Tone
Low Tone
350
440
-7
-9
7
9
Hz Nominal frequency
Hz Nominal frequency
Hz Within this range, tones are accepted.
Frequency Deviation Reject
FDR High Tone
Low Tone
-13
-11
13 Outside this range, tones are rejected.
11
SIGAC
Accept Signal Level per tone
-31
-12 dBV Input op amp configured to 0 dB gain for
SIGRJ
TA
Reject Signal Level per tone
(VCC = 5 V ± 10%, 3 V ± 10%)
Positive and Negative Twist Accept #
-6
-36
dBV
5 V operation, gain for 3 V operation is
TBD. Signal level is per tone.
6 dB
SNR Signal to Noise Ratio ##
20
dB
# Twist = 20 |log ( fH amplitude / fL amplitude )|.
## Both tones have the same amplitude and at nominal frequencies. Band limited random noise 300-3400 Hz. Measurement valid only when tone is present.
16










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