September 1993

18

Philips Semiconductors

Product specification

5-Bit x 64-word FIFO register; 3-state

74HC/HCT7404

Shift-out operation; high-speed burst mode

Note to Fig.13

In the high-speed mode, the burst-out rate is determined by the minimum shift-out HIGH and shift-out LOW

specifications. The DOR flag is a don't care condition and an SO pulse can be applied without regard to the flag.

Fig.13 Waveforms showing SO minimum pulse width and maximum pulse frequency, in high-speed shift-out

burst mode.

handbook, full pagewidth

MGA663

VM

(1)

SO INPUT

Qn OUTPUT

1/f max

tW

DOR OUTPUT

(1) HC

:

HCT :