74HC259 Datasheet, PDF (7/11 Pages) NXP Semiconductors – 8-bit addressable latch

Philips Semiconductors
8-bit addressable latch
Product specification
74HC/HCT259
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
I_CC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF
T_amb (°C)
TEST CONDITIONS
SYMBOL PARAMETER
min.
+25
typ.
max.
74HC
−40 to +85
min. max.
−40 to +125
min. max.
UNIT _VCC WAVEFORMS
(V)
t_PHL/ t_PLH propagation delay
D to Q_n
t_PHL/ t_PLH propagation delay
A_n to Q_n
58 185
230
280 ns 2.0 Fig.7
21 37
46
56
4.5
17 31
39
48
6.0
58 185
230
280 ns 2.0 Fig.8
21 37
46
56
4.5
17 31
39
48
6.0
t_PHL/ t_PLH propagation delay
LE to Q_n
55 170
215
255 ns 2.0 Fig.6
20 34
43
51
4.5
16 29
37
43
6.0
t_PHL
propagation delay
MR to Q_n
t_THL/ t_TLH output transition time
50 155
195
235 ns 2.0 Fig.9
18 31
39
47
4.5
14 26
33
40
6.0
19 75
95
119 ns 2.0 Figs 6 and 7
7 15
19
22
4.5
6 13
16
19
6.0
t_W
LE pulse width
70 17
90
105
ns 2.0 Fig.6
HIGH or LOW
14 6
18
21
4.5
12 5
15
18
6.0
t_W
MR pulse width
LOW
t_su
set-up time
D, A_n to LE
t_h
hold time
D to LE
t_h
hold time
A_n to LE
70 17
14 6
12 5
80 19
16 7
14 6
0 −19
0 −6
0 −5
2 −11
2 −4
2 −3
90
105
18
21
15
18
100
120
20
24
17
20
0
0
0
0
0
0
2
2
2
2
2
2
ns 2.0 Fig.9
4.5
6.0
ns 2.0 Figs 10 and 11
4.5
6.0
ns 2.0 Fig.10
4.5
6.0
ns 2.0 Fig.11
4.5
6.0
December 1990
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