HD74HCT540_15 Datasheet, PDF (7/11 Pages) Renesas Technology Corp – HD74HCT540

HD74HCT540, HD74HCT541
Waveforms
HD74HCT540
• Waveform – 1
t_r
Input A
10 %
90 %
1.3 V
t_PHL
t_f
90 %
1.3 V
10 %
t_PLH
Output Y
90 %
1.3 V
10 %
1.3 V
10 %
90 %
t_THL
t_TLH
V_CC
0V
V_OH
V_OL
• Waveform – 2
t_f
Input G
90 %
1.3 V
10 %
t_ZL
t_r
10 %
90 %
1.3 V
t_LZ
Waveform – A
Waveform – B
1.3 V
t_ZH
1.3 V
10 %
t_HZ
90 %
V_CC
0V
V_OH
V_OL
V_OH
V_OL
Notes : 1. Input waveform : PRR ≤ 1 MHz, duty cycle 50%, t_r ≤ 6 ns, t_f ≤ 6 ns
2. Waveform– A is for an output with internal conditions such that the
output is low except when disabled by the output control.
3. Waveform– B is for an output with internal conditions such that the
output is high except when disabled by the output control.
4. The output are measured one at a time with one transition per measurement.
Rev.2.00 Mar 30, 2006 page 5 of 8