nw6005 Integrated Device Technology, nw6005 Datasheet - Page 9

• Manufacturer Part Number: nw6005
• Description: Enhanced Type Ii Caller Id Decoder
• Manufacturer: Integrated Device Technology

APPLICATION INFORMATION
The microcontroller supplies read pulses (DCLK) to shift the register
contents serially out of the NW6005, onto the DATA pin. The DR pin is
also used to indicate the word boundary.
NW6005 ENHANCED TYPE II CALLER ID DECODER
In FSK mode 1, the received byte is stored in an on-chip register.
Note:
1. Resistors are 1%, 0.1Watt; Unless stated, capacitors are 5%, 6.3 V.
2. All diodes in the circuit are 1N4148 or equivalent.
3. Xtal is 3.579545 MHz, 0.1% crystal or ceramic resonator.
4. Tip/Ring op amp gain = 0 dB; Hybrid Receive op amp gain = -3 dB.
5. For 1000 Vrms, 60 Hz isolation from Tip to Earth and Ring to Earth:
6. For BT application, R3=R4= 422k;
R1, R2 = 430 k, 0.5 W, 5%, 500 V min.
For Bellcore application, R3=825k, R4=226k.
RING
TIP
Figure 9. Typical Application Circuit For Bellcore MEI Compatible Type II Telephone, 5 V Operation
FSK Interface Mode 1 is selected
C1, C2 = 2n2, 250 V min.
C2
C1
R2
B
R1
A
39k
GND
39k
Xtal
470k
TIP
RING
VREF
IN1+
IN1-
GS1
GND
OSCIN
OSCOUT
CB0
DCLK
DATA
9
VALID DT-AS EVALUATION
speech. In this way, valid DT-AS pulse evaluation becomes necessary.
The evaluation defines a minimum and maximum pulse duration,
and maximum drop out time within that pulse duration. See Figure 21
for reference.
DT-AS output will generate false detection if being interfered by
Telephone
NW6005
Hybrid
DR/STD
ST/GT
IN2+
VCC
GS2
CB2
CB1
IN2-
EST
Rx+
Tx+
Rx-
Tx-
CD
INDUSTRIAL TEMPERATURE RANGE
330k
R3
R4
To Microcontroller
From Microcontroller
470k
470k
VCC= 5V +/-10%
Microphone
2n2
2n2
Speaker