HD74HC259 Datasheet, PDF (6/10 Pages) Hitachi Semiconductor – 8-bit Addressable Latch

HD74HC259
• Waveform – 3
V_CC
Data
0V
t_f
t_r
90 %
90 %
V_CC
Address
50 %
50 %
50 %
(A to C)
10 %10 %
0V
t_PLH
t_PHL
Addressed
90 %
90 %
V_OH
Output Q
50 %
50 %
10 %
10 %
V_OL
t_TLH
Addressed
Output Q
t_THL
V_OH
V_OL
Notes : 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns
2. Other input : G = GND, Clear = V_CC, A to C = Address
• Waveform – 4
Data
50%
50%
50%
tsu(H)
th(H)
tf
tr
tsu(L)
th(L)
90%
90%
G
50%
50%
50%
50%
10% 10%
tw(G)
tPLH
tPHL
90%
90%
Qn
50%
50%
10%
10%
tTLH
tTHL
Notes : 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. Other input : Clear = V_CC, A to C = Address
V_CC
0V
V_CC
0V
VOH
VOL
Rev.2.00 Jan 31, 2006 page 6 of 9