HD74HC620_15 Datasheet, PDF (10/14 Pages) Renesas Technology Corp – Octal Bus Transceivers (with inverted 3-state outputs)

HD74HC620, HD74HC623
HD74HC623
• Waveform – 2
tf
tr
Enable Input
90 %
50 %
90 %
V_CC
50 %
GBA
10 %
10 %
0V
t_ZL
t_LZ
Waveform - A
50 %
t_ZH
10 %
t_HZ
V_OH
V_OL
Waveform - B
50 %
90 %
V_OH
V_OL
• Waveform – 3
tr
tf
Enable Input
90 %
50 %
90 %
50 %
V_CC
GAB
10 %
10 %
0V
t_ZL
t_LZ
Waveform - A
50 %
t_ZH
10 %
t_HZ
V_OH
V_OL
Waveform - B
50 %
90 %
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 8 of 11