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CF5029A-2

Divide-by-512 Frequency Output, Crystal Oscillator Module IC

Nippon Precision Circuits  

CF5029A

FUNCTIONAL DESCRIPTION

Standby Function

When INHN goes LOW, the device is in standby mode. The Q output becomes high impedance and the oscilla-

tor circuit stops.

INHN

HIGH (or open)

LOW

Q

f O /512

High impedance

Oscillator

Normal operation

Stopped

Power-saving Pull-up Resistor

The INHN pin pull-up resistance changes in response to the input level (HIGH or LOW). When INHN is tied

LOW, the pull-up resistance becomes large, reducing the current consumed by the resistance. When INHN is

open circuit, the pull-up resistance becomes small, decreasing the susceptibility to the effects of external noise.

SEIKO NPC CORPORATION —5

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