HD74HC294 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD74HC294

Programmable Frequency Divider/Digital Timer

Hitachi -> Renesas Electronics 

HD74HC292/HD74HC294

Programmable Frequency Divider/Digital Timer

Description

This device divides the incoming clock frequency by a number (a power of 2) that is preset by the

Programming inputs. It has two Clock inputs, either of which may be used as a clock inhibit. The device

also has an active-low Reset, which initializes the internal flip-flop states. Test Point outputs (TP1, TP2,

TP3) are provided with HD74HC292 to facilitate incoming inspections.

Test Point output is provided with HD74HC294 to facilitate incoming inspections.

Features

• High Speed Operation: tpd (Clock to Q) = 16 ns typ (CL = 50 pF)

• High Output Current: Fanout of 10 LSTTL Loads

• Wide Operating Voltage: VCC = 2 to 6 V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

Function Table

CLR

L

H

H

H

H

CLK1

X

L

H

X

CLK2

X

L

X

H

Q Output Mode

Cleared to L

Count

Count

Inhibit

Inhibit

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