74HC259 Datasheet, PDF (9/11 Pages) NXP Semiconductors – 8-bit addressable latch

Philips Semiconductors
8-bit addressable latch
Product specification
74HC/HCT259
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
min.
+25
typ.
74HCT
−40 TO +85
max. min. max.
−40 TO +125
UNIT
V_CC
(V)
WAVEFORMS
min. max.
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL/ t_PLH
t_PHL
t_THL/ t_TLH
propagation delay
D to Q_n
propagation delay
A_n to Q_n
propagation delay
LE to Q_n
propagation delay
MR to Q_n
output transition time
23 39
49
25 41
51
22 38
48
23 39
49
7 15
19
59 ns 4.5 Fig.7
62 ns 4.5 Fig.8
57 ns 4.5 Fig.6
59 ns 4.5 Fig.9
22 ns 4.5 Figs 6 and 7
t_W
LE pulse width
LOW
t_W
MR pulse width
LOW
t_su
set-up time
D to LE
t_su
set-up time
A_n to LE
t_h
hold time
D to LE
t_h
hold time
A_n to LE
19 11
18 10
17 10
17 10
0 −8
0 −4
24
29
23
27
21
26
21
26
0
0
0
0
ns 4.5 Fig.6
ns 4.5 Fig.9
ns 4.5 Fig.10
ns 4.5 Fig.11
ns 4.5 Fig.10
ns 4.5 Fig.11
December 1990
9