SM8706AV 查看數據表（PDF） - Nippon Precision Circuits

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SM8706AV

Clock Generator for DVD Players

Nippon Precision Circuits  

SM8706A

FUNCTIONAL DESCRIPTION

36.8640MHz Master Clock

The SM8706A 36.8640MHz master clock circuit is configured, as shown in Figure 3, with the crystal oscillator

element connected between XTI (pin 7) and XTO (pin 8).

Alternatively, the 36.8640MHz master clock can be supplied from an external master clock input on XTI, as

shown in Figure 4.

If an external input clock on XTI is used, it is recommended that the frequency be 36.8640MHz, with 50%

duty, and 3.3V voltage amplitude level.

Furthermore, when using an external clock input, the input signal voltage should not exceed the absolute max-

imum rating, otherwise damage may occur.

C1

XTI (Pin 7)

Oscillator

C2

XTO (Pin 8)

C1, C2 = 5 to 33pF

Control

Logic

Internal

Circuits

MO1 (Pin 3)

MO2 (Pin 4)

Figure 3. Crystal oscillator connection

External Clock

Open

XTI (Pin 7)

Oscillator

XTO (Pin 8)

Control

Logic

Internal

Circuits

MO1 (Pin 3)

MO2 (Pin 4)

Figure 4. External clock input

NIPPON PRECISION CIRCUITS—5

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