nw6003 Integrated Device Technology, nw6003 Datasheet - Page 9

• Manufacturer Part Number: nw6003
• Description: Type Ii Caller Id Decoder
• Manufacturer: Integrated Device Technology

NW6003 TYPE II CALLER ID DECODER
APPLICATION INFORMATION
APPLICATION CIRCUITS
operation, the gain ratio of the op amp is set to unity to optimize the
electrical characteristics. As the power supply voltage drops, the
threshold of tone and FSK detectors will be lower. To meet the BT and
Bellcore tone reject level requirements, the gain of the op amp should
be adjusted according to the graph in Figure 12.
on the tip and ring interface will be falsely detected. One way to avoid
such false detection is to use the photo-coupler LED between the
diode bridge and TRIGIN pin.
BELLCORE/BT/CCA APPLICATIONS
Figure 13 shows the timing diagram of Bellcore on-hook data
transmission, and Figure 14 shows Bellcore off-hook data
transmission. The BT operations are shown in Figure 15 and Figure
16, and the CCA operation in Figure 17.
Figure 11 shows the typical NW6003 application circuit. For 5 V
It should be noted that the glitch with sufficient amplitude appears
The NW6003 supports three specifications: Bellcore, BT and CCA.
Tip/A
Ring/B
For VCC = 5V 10%, R1 = R1’ = 430 k , R4 = R4’ = 34 k
For VCC = 3V 10%, R1 = R1’ = 620 k , R4 = R4’ = 63 k
For BT application, C = 0.1 F 5%, R2 = R3 = 422K 1%.
For Bellcore application, C = 0.1 F 5%, R2 = 266K 1%,
Resistor tolerance 5% and capacitor tolerance 10% unless
otherwise specified.
Crystal frequency 3.579545 MHz with 0.1%tolerance.
R3= 825K 1%.
22 nF 5%
22 nF 5%
0.1 F 5%
0.1 F 5%
R1' 1%
R1 1%
500K
500K
VCC
VCC
R4' 1%
R4 1%
VCC
200K
300K
Figure 11. Typical Application Circuit
53K6
1%
VCC
60K4
330K
1%
0.22 F
0.1 F
9
464K 1%
Figure 12. Gain Ratio as a Function of Nominal VCC
0.678
1.0
0.8
0.7
0.6
0.5
0.9
IN+
IN-
GS
VREF
CAP
TRIGIN
TRIGRC
TRIGOUT
OSCOUT
MODE
OSCIN
GND
2
Gain Ratio of op amp
NW6003
3
Nominal VCC(Volts)
FSKEN
PWDN
ST/GT
INDUSTRIAL TEMPERATURE RANGE
DCLK
DATA
VCC
EST
STD
4
INT
TM
CD
DR
=
5
C
VCC
R3
464k
R1 + R4
6
R2
VCC
0.1 F
100K
7