Datasheet

6
SN54HCT244 , SN74HCT244
SCLS175E –MONTH 2003–REVISED AUGUST 2016 www.ti.com
Product Folder Links: SN54HCT244 SN74HCT244
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6.6 Switching Characteristics: C
L
= 50 pF
over recommended operating free-air temperature range, C
L
= 50 pF (unless otherwise noted) (see Figure 2 )
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
TEST
CONDITIONS
MIN TYP MAX UNIT
t
pd
A Y
4.5 V
T
A
= 25°C 15 28
ns
SN54HCT244 42
SN74HCT244 35
5.5 V
T
A
= 25°C 13 25
SN54HCT244 38
SN74HCT244 32
t
en
OE Y
4.5 V
T
A
= 25°C 21 35
ns
SN54HCT244 53
SN74HCT244 44
5.5 V
T
A
= 25°C 19 32
SN54HCT244 48
SN74HCT244 40
t
dis
OE Y
4.5 V
T
A
= 25°C 19 35
ns
SN54HCT244 53
SN74HCT244 44
5.5 V
T
A
= 25°C 18 32
SN54HCT244 48
SN74HCT244 40
t
t
Y
4.5 V
T
A
= 25°C 8 12
ns
SN54HCT244 18
SN74HCT244 15
5.5 V
T
A
= 25°C 7 11
SN54HCT244 16
SN74HCT244 14
6.7 Switching Characteristics: C
L
= 150 pF
over recommended operating free-air temperature range, C
L
= 150 pF (unless otherwise noted) (see Figure 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
TEST
CONDITIONS
MIN TYP MAX UNIT
t
pd
A Y
4.5 V
T
A
= 25°C 21 45
ns
SN54HCT244 68
SN74HCT244 56
5.5 V
T
A
= 25°C 18 40
SN54HCT244 61
SN74HCT244 51
t
en
OE Y
4.5 V
T
A
= 25°C 25 52
ns
SN54HCT244 79
SN74HCT244 65
5.5 V
T
A
= 25°C 22 47
SN54HCT244 71
SN74HCT244 59