Datasheet

SN54HC244, SN74HC244
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SCLS130D – DECEMBER 1982 – REVISED AUGUST 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
V
CC
T
A
= 25°C SN54HC244 SN74HC244
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
A
Y
2 V 40 115 170 145
ns
t
pd
A
Y
4.5 V 13 23 34 29
ns
pd
6 V 11 20 29 25
t
OE
Y
2 V 75 150 225 190
ns
t
en
OE
Y
4.5 V 15 30 45 38
ns
en
6 V 13 26 38 32
t
OE
Y
2 V 75 150 225 190
ns
t
dis
OE
Y
4.5 V 15 30 45 38
ns
dis
6 V 13 26 38 32
t
Y
2 V 28 60 90 75
ns
t
t
Y
4.5 V 8 12 18 15
ns
t
6 V 6 10 15 13
switching characteristics over recommended operating free-air temperature range, C
L
= 150 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
V
CC
T
A
= 25°C SN54HC244 SN74HC244
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
A
Y
2 V 56 165 245 210
ns
t
pd
A
Y
4.5 V 18 33 49 42
ns
pd
6 V 15 28 42 35
t
OE
Y
2 V 100 200 300 250
ns
t
en
OE
Y
4.5 V 20 40 60 50
ns
en
6 V 17 34 51 43
t
Y
2 V 45 210 315 265
ns
t
t
Y
4.5 V 17 42 63 53
ns
t
6 V 13 36 53 45
operating characteristics, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance per buffer/driver No load 35 pF