HEF4753 데이터 시트보기 (PDF) - Philips Electronics

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HEF4753

Universal timer module

Philips Electronics 

Philips Semiconductors

Universal timer module

Product specification

HEF4753B

LSI

2. Divider mode (LFC = LOW; Y = HIGH; Z = LOW)

In this mode the output OUT should be connected to input IN. If not, only one counter cycle starts after a transition at

input IN (see Fig.4 and note 1.).

A B C D E F G H W X LFC Y Z

L L H H H H HH L L L H L

Fig.4 Timing diagram for divider mode; t1 = delay until set of 8-bit counter; t2, t3 see Fig.3.

3. Delayed LOW to HIGH edge mode; see note 2. (LFC = HIGH; Y = HIGH; Z = LOW)

A B C D E F G H W X LFC Y Z

H L HHH H H H L L H H L

Fig.5 Timing diagram for delayed LOW to HIGH edge mode; t1 = delay until set of 8-bit counter; t2 = delay to

set 8-bit counter; t3 = predefined delay by programming; t4 = delay until next negative clock edge;

t5 = delay until next positive clock edge.

January 1995

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