74HC574 データシートの表示（PDF） - NXP Semiconductors.

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74HC574

Octal D-type flip-flop; positive edge-trigger; 3-state

NXP Semiconductors. 

Philips Semiconductors

Octal D-type flip-flop; positive edge-trigger;

3-state

AC WAVEFORMS

Product specification

74HC/HCT574

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.6

Waveforms showing the clock input (CP)

pulse width, the CP input to output (Qn)

propagation delays, the output transition

times and the maximum clock pulse

frequency.

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.7 Waveforms showing the 3-state enable and

disable times.

PACKAGE OUTLINES

See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.

The shaded areas indicate when the input is permitted

to change for predictable output performance.

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.8 Waveforms showing the data set-up and

hold times for Dn input to CP input.

December 1990

7

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