74HCT74D 参数 Datasheet PDF下载

Philips Semiconductors

Product specification

Dual D-type flip-flop with set and reset;

positive-edge trigger

AC WAVEFORMS

74HC74; 74HCT74

handbook, full pagewidth

VI

nD input

GND

th

t su

1/fmax

VI

nCP input

GND

tW

t PHL

VOH

nQ output

VOL

VOH

nQ output

VOL

t PLH

t PHL

VM

MNA422

VM

th

t su

VM

t PLH

VM

The shaded areas indicate when the input is permitted to change for predictable output performance.

74HC74: V

M

= 50%; V

I

= GND to V

CC

.

74HCT74: V

M

= 1.3 V; V

I

= GND to 3 V.

Fig.7

The clock (nCP) to output (nQ, nQ) propagation delays, the clock pulse width, the nD to nCP set-up,

the nCP to nD hold times, the output transition times and the maximum clock pulse frequency.

2003 Jul 10

13