1998 Apr 10

8

Philips Semiconductors

Product specification

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

3-state; inverting

74HC/HCT534

AC WAVEFORMS

Fig.6

transition times and the maximum clock pulse frequency.

dbook, full pagewidth

MGM959

tPHL

1/fmax

tPLH

tW

VM

(1)

VM

(1)

CP INPUT

Qn OUTPUT

tTHL

tTLH

Fig.7 Waveforms showing the 3-state enable and disable times.

andbook, full pagewidth

MGM961

tPLZ

tPHZ

outputs

disabled

outputs

enabled

90%

10%

outputs

enabled

OE INPUT

VM

(1)

tPZL

tPZH

VM

(1)

VM

(1)

Qn OUTPUT

LOW-to-OFF

OFF-to-LOW

Qn OUTPUT

HIGH-to-OFF

OFF-to-HIGH

tr

tf

90%

10%