w91030b Winbond Electronics Corp America, w91030b Datasheet - Page 21

• Manufacturer Part Number: w91030b
• Description: Calling Line Identifier
• Manufacturer: Winbond Electronics Corp America

APPLICATION INFORMATION
Application Circuit
Analog Interface
The application circuit of the W91030B in Figure 9-1 shows the device being used within a typical
CPE system. Note that only the circuit between the W91030B and the line interface is shown. The
gain control op-amp is set to unity gain to allow the electrical characteristics to be met in this
application circuit. It should also be noted that if a glitch with sufficient amplitude appears on the tip
and ring interface, this will be detected as a ringing input by this circuit.
Another application circuit for the W91030B, which provides common mode rejection of ringing circuit
signals, is shown in Figure 9-2. When the AC voltage between the tip and ring is greater than the
zener diode breakdown voltage, the photo-coupler LED will turn on, driving RNGDI high and thus
detecting a ringing signal. Note however in this case, a glitch on the tip and ring interface is not able
to turn on the photo-coupler and therefore will not be detected as a ringing signal.
Tip/A
Ring/B
Crystal is 3.579545MHz with 0.1% frequency tolerance.
0.1uF
0.1uF
22nF
22nF
Resistor must have 1% tolerance.
Resistor may have 5% tolerance.
470K
430K
430K
470K
+5V
+5V
+5V
34K
34K
0.1uF
200K
300K
53K6
(This net must as short as possible)
Figure 9-1 Application Circuit
+5V
60K4
150K
0.22uF
- 21 -
464K
R1, R2 must calculated according to the formula of Fig. 7-6 (a)
for Bellcore or BT application.
FSK 3-wire interface Mode 0 selected.
INP
INN
GCFB
VREF
CAP
RNGDI
RNGRC
RNGON
MODE
OSCI
OSCO
VSS
Preliminary W91030B
W91030B
Publication Release Date: March 2000
ALGRC
SLEEP/
RESET
ALGO
DATA
ALGR
DCLK
FCDN
FDRN
INTN
FSKE
TEST
VDD
+5V
R1
Must rest by
microcontroller
or by RC pulse.
+5V
0.1uF
R2
Revision A1
+5V
10K