SN54HC259, SN74HC259
8-BIT ADDRESSABLE LATCHES
SCLS134B – DECEMBER 1982 – REVISED MAY 1997
timing requirements over recommended operating free-air temperature range (unless otherwise
noted)
VCC
2V
CLR low
tw
Pulse duration
G low
4.5 V
6V
2V
4.5 V
6V
2V
tsu
Setup time, data or address before G↑
↑
4.5 V
6V
2V
th
Hold time, data or address after G↑
↑
4.5 V
6V
TA = 25°C
MIN
MAX
80
16
14
80
16
14
75
15
13
5
5
5
SN54HC259
MIN
120
24
20
120
24
20
115
23
20
5
5
5
MAX
SN74HC259
MIN
100
20
17
100
20
17
95
19
16
5
5
5
ns
ns
ns
MAX
UNIT
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
2V
tPHL
CLR
Any Q
4.5 V
6V
2V
Data
Any Q
4.5 V
6V
2V
tpd
Address
Any Q
4.5 V
6V
2V
G
Any Q
4.5 V
6V
2V
tt
Any
4.5 V
6V
TA = 25°C
MIN
TYP
MAX
60
18
14
56
17
13
74
21
17
66
20
16
28
8
6
150
30
26
130
26
22
200
40
34
170
34
29
75
15
13
SN54HC259
MIN
MAX
225
45
38
195
39
33
300
60
51
255
51
43
110
22
19
SN74HC259
MIN
MAX
190
38
32
165
33
28
250
50
43
215
43
37
95
19
16
ns
ns
ns
UNIT
operating characteristics, T
A
= 25°C
PARAMETER
Cpd
Power dissipation capacitance per latch
TEST CONDITIONS
No load
TYP
33
UNIT
pF
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
7
TI [ TEXAS INSTRUMENTS ]
