HD74LV244A Datasheet, PDF (11/15 Pages) Hitachi Semiconductor – Octal Buffers / Drivers with 3-state Outputs

• Waveform – 1
Input A
tr
10%
90%
50% V_CC
t_PLH
tf
90%
50% V_CC
10 %
t_PHL
Output Y
50% V_CC
50% V_CC
HD74LV244A
V_CC
0V
V_OH
V_OL
• Waveform – 2
tf
tr
90%
90%
V_CC
Input OE
50% V_CC
50% V_CC
10%
10 %
0V
t_ZL
t_LZ
Waveform – A
Waveform – B
50% V_CC
t_ZH
50% V_CC
V_OL + 0.3 V
t_HZ
V_OH – 0.3 V
V_CC
V_OL
V_OH
0V
Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 3 ns, t_f ≤ 3 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..
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