SN54AHCT244, SN74AHCT244
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS228L 鈥?OCTOBER 1995 鈥?REVISED JULY 2003
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V
卤
0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
FROM
(INPUT)
A
TO
(OUTPUT)
Y
Y
Y
LOAD
CAPACITANCE
CL = 15 pF
CL = 15 pF
CL = 15 pF
CL = 50 pF
CL = 50 pF
CL = 50 pF
TA = 25掳C
MIN
TYP
MAX
5.4*
5.4*
7.7*
7.7*
5*
5*
5.9
5.9
8.2
8.2
8.8
8.8
7.4*
7.4*
10.4*
10.4*
9.4*
9.4*
8.4
8.4
11.4
11.4
11.4
11.4
1**
SN54AHCT244
MIN
1*
1*
1*
1*
1*
1*
1
1
1
1
1
1
MAX
8.5*
8.5*
12*
12*
10*
10*
9.5
9.5
13
13
13
13
SN74AHCT244
MIN
1
1
1
1
1
1
1
1
1
1
1
1
MAX
8.5
8.5
12
12
10
10
9.5
9.5
13
13
13
13
1
UNIT
ns
ns
ns
OE
OE
A
Y
Y
Y
ns
ns
ns
ns
OE
OE
tsk(o)
CL = 50 pF
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
** On products compliant to MIL-PRF-38535, this parameter does not apply.
noise characteristics, V
CC
= 5 V, C
L
= 50 pF, T
A
= 25掳C (see Note 4)
PARAMETER
VOH(V)
VIH(D)
Quiet output, minimum dynamic VOH
High-level dynamic input voltage
2
0.8
SN74AHCT244
MIN
TYP
4.1
MAX
UNIT
V
V
V
VIL(D)
Low-level dynamic input voltage
NOTE 4: Characteristics are for surface-mount packages only.
operating characteristics, V
CC
= 5 V, T
A
= 25掳C
PARAMETER
Cpd
Power dissipation capacitance
TEST CONDITIONS
No load,
f = 1 MHz
TYP
8.2
UNIT
pF
4
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
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