W91031 查看數據表（PDF） - Winbond

零件编号

产品描述 (功能)

生产厂家

W91031

CALLING LINE IDENTIFIER

Winbond 

Preliminary W91031

Crystal Oscillator

The operation frequency of the W91031 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:

Frequency:

3.579545 MHz

Frequency tolerance:

+/- 0.1 % (-40° C to +85° C)

Resonance mode:

Parallel

Load capacitance:

18 pF

Maximum series resistance: 150 Ω

Maximum drive level (mV): 2 mV

(a) W ith crystal osscillator or ceram ic

W91031

OSCI OSCO

3.579545 MHz

(b) W ith other clock

W91031

OSCI OSCO

Oscillator

OSCO

3.579545 MHz

W91031

OSCI OSCO

W91031

OSCI OSCO

Figure 7-9. Some Application of Clock Driven Circuit

Bias Voltage Generator

The bias voltage generator provides a low impedance voltage source equal to VDD/2 and is used to

bias the gain control op-amp. The voltage source is also used for internal circuits. A 0.1 µF capacitor

should be placed between the VREF pin and VSS to reduce noise.

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Publication Release Date: August 2000

Revision A1

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