Datasheet
SN54AHC540, SN74AHC540
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS260J – DECEMBER 1995 – REVISED JULY 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range,
V
CC
= 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO LOAD
T
A
= 25°C SN54AHC540 SN74AHC540
UNIT
PARAMETER
(INPUT) (OUTPUT) CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
A
Y
C
L
=15
p
F
4.8* 7* 1* 8.5* 1 8.5
ns
t
PHL
A
Y
C
L
=
15
pF
4.8* 7* 1* 8.5* 1 8.5
ns
t
PZH
OE
Y
C
L
=15
p
F
6.8* 10.5* 1* 12.5* 1 12.5
ns
t
PZL
OE
Y
C
L
=
15
pF
6.8* 10.5* 1* 12.5* 1 12.5
ns
t
PHZ
OE
Y
C
L
=15
p
F
6.8* 10.5* 1* 12.5* 1 12.5
ns
t
PLZ
OE
Y
C
L
=
15
pF
6.8* 10.5* 1* 12.5* 1 12.5
ns
t
PLH
A
Y
C
L
=50
p
F
7.3 10.5 1 12 1 12
ns
t
PHL
A
Y
C
L
=
50
pF
7.3 10.5 1 12 1 12
ns
t
PZH
OE
Y
C
L
=50
p
F
8 14 1 16 1 16
ns
t
PZL
OE
Y
C
L
=
50
pF
8 14 1 16 1 16
ns
t
PHZ
OE
Y
C
L
=50
p
F
8 15.4 1 17.5 1 17.5
ns
t
PLZ
OE
Y
C
L
=
50
pF
8 15.4 1 17.5 1 17.5
ns
t
sk(o)
C
L
= 50 pF 1.5** 1.5 ns
∗
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.
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO LOAD
T
A
= 25°C SN54AHC540 SN74AHC540
UNIT
PARAMETER
(INPUT) (OUTPUT) CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
A
Y
C
L
=15
p
F
3.7* 5* 1* 6* 1 6
ns
t
PHL
A
Y
C
L
=
15
pF
3.7* 5* 1* 6* 1 6
ns
t
PZH
OE
Y
C
L
=15
p
F
4.7* 7.2* 1* 8.5* 1 8.5
ns
t
PZL
OE
Y
C
L
=
15
pF
4.7* 7.2* 1* 8.5* 1 8.5
ns
t
PHZ
OE
Y
C
L
=15
p
F
4.5* 6.8* 1* 8* 1 8
ns
t
PLZ
OE
Y
C
L
=
15
pF
4.5* 6.8* 1* 8* 1 8
ns
t
PLH
A
Y
C
L
=50
p
F
5.2 7 1 8 1 8
ns
t
PHL
A
Y
C
L
=
50
pF
5.2 7 1 8 1 8
ns
t
PZH
OE
Y
C
L
=50
p
F
6.2 9.2 1 10.5 1 10.5
ns
t
PZL
OE
Y
C
L
=
50
pF
6.2 9.2 1 10.5 1 10.5
ns
t
PHZ
OE
Y
C
L
=50
p
F
6 8.8 1 10 1 10
ns
t
PLZ
OE
Y
C
L
=
50
pF
6 8.8 1 10 1 10
ns
t
sk(o)
C
L
= 50 pF 1** 1 ns
∗
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.