HD74HC299 Datasheet, PDF (7/9 Pages) Hitachi Semiconductor – 8-bit Universal Shift/Storage Register (with 3-state outputs)

HD74HC299
• Waveform – 2
t_r
t_f
90 % 90 %
V_CC
Clock
50 %
10 %
10 %
0V
t_r
t_f
90 % 90 %
V_CC
S₀, S₁
50 %
50 %
50 %
50 %
10 %
10 %
0V
t_su t_h
V_IH
A to H
50 %
50 %
V_IL
Q_A to Q_H
V_OH
V_OL
A to H enabled A to H disabled A to H enabled A to H disabled
Q_A to Q_H disabled Q_A to Q_H enabled Q_A to Q_H disabled Q_A to Q_H enabled
Note : 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, t_f ≤ 6 ns
• Waveform – 3
tf
tr
90 %
90 %
V_CC
G₁, G₂
50 %
50 %
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 Jan 31, 2006 page 7 of 8