HD74LS243

Rev.3.00, Jul.15.2005, page 5 of 6

Waveforms 2

3 V

0 V

3 V

0 V

~

~ 4.5 V

~

~ 1.5 V

~

~ 1.5 V

~

~ 0 V

3 V

0 V

3 V

0 V

1.3 V

0.5 V

0.5 V

1.3 V

1.3 V

1.3 V

10 %

GAB

GBA

Waveform-a

Waveform-b

10 %

90 %

1.3 V

1.3 V

90 %

Notes:

1.

≤ 15 ns, t

THL

≤ 6 ns, PRR = 1 MHz, duty cycle 50%

2.

Waveform a is an output by internal conditions like "L" except for the case where an output is

disabled by output control.

3.

Waveform b is an output by internal conditions like "H" except for the case where an output is

disabled by output control.