HD74HC137 Datasheet, PDF (6/10 Pages) Hitachi Semiconductor – 3-to-8-line Decoder/Demultiplexer with Address Latch

HD74HC137
Waveforms
• Waveform – 1
6ns
6ns
Input
A,B,C
90%
10%
90%
50%
10%
tW
tPLH
90% 90%
50%
10% 10%
tW
tPHL
Output Y
10%
90%
50%
90%
50%
10%
tTLH
tTHL
V_CC
0V
VOH
VOL
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. The output are measured one at a time with one transition per measurement.
• Waveform – 2
6ns
G2
90%
50%
10%
6ns
10%
90%
50%
Output Y
tPHL
90%
50%
10%
tTHL
tPLH
10%
90%
50%
tTLH
V_CC
0V
VOH
VOL
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. The output are measured one at a time with one transition per measurement.
• Waveform – 3
6ns
G1
90%
50%
10%
6ns
90%
50%
10%
Output Y
tPHL
90%
50%
10%
tTHL
tPLH
10%
90%
50%
tTLH
V_CC
0V
VOH
VOL
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. The output are measured one at a time with one transition per measurement.
Rev.2.00, Oct 11, 2005 page 6 of 9