w91030b Winbond Electronics Corp America, w91030b Datasheet - Page 12

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

Crystal Oscillator
The operation frequency of the W91030B is 3.579545 MHz. Crystal oscillators, ceramic resonators or
other clock sources can be used. A crystal oscillator or ceramic resonator can be directly connected
to the OSCI and OSCO pins without the need for external components. If other clock sources are
used, the OSCI pin should be driven by a clock source and the OSCO pin used to drive other external
clocked devices, or left open. Figure 7-9 shows some applications.
The crystal specification is as follows:
Bias Voltage Generator
The bias voltage generator provides a low impedance voltage source equal to V
bias the gain control op-amp. The voltage source is also used for internal circuits. A 0.1 F capacitor
had better be placed between the VREF pin and V
Frequency:
Frequency tolerance:
Resonance mode:
Load capacitance:
Maximum series resistance: 150
Maximum drive level (mV):
3.579545 MHz
(a) With crystal osscillator or ceramic resonator
(b) With other clock source
Oscillator
OSCO
Figure 7-9. Some Application of Clock Driven Circuit
3.579545 MHz
+/- 0.1 % (-40 C to +85 C)
Parallel
18 pF
2 mV
W91030B
OSCI
OSCO
3.579545 MHz
W91030B
OSCI
- 12 -
OSCO
SS
OSCI
W91030B
to reduce noise.
OSCO
Preliminary W91030B
OSCI
W91030B
OSCO
DD
/2 and is used to