HD74HC259 Datasheet, PDF (5/10 Pages) Hitachi Semiconductor – 8-bit Addressable Latch

HD74HC259
Waveforms
• Waveform – 1
tf
tr
90%
90%
Enable G
10%
10%
tf
tr
Clear
90%
50%
10%
10%
tw (Clear)
tPHL
90%
50%
Addressed
Output Q
90%
50%
10%
tTHL
Notes : 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. D = V_CC , Unaddressed Q = L
V_CC
0V
V_CC
0V
VOH
VOL
• Waveform – 2
Data
tr
tf
10%
90%
50%
90%
50%
10%
tPLH
tPHL
Output Q
50%
10%
90%
90%
50%
10%
tTLH
tTHL
Notes : 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. Other input : G = GND, Clear = Vcc, A to C = Address
V_CC
0V
VOH
VOL
Rev.2.00 Jan 31, 2006 page 5 of 9