Datasheet
SN54AHC245, SN74AHC245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS230I – OCTOBER 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 SN54AHC245 SN74AHC245
UNIT
PARAMETER
(INPUT) (OUTPUT) CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
AorB
BorA
C
L
=15
p
F
5.8** 8.4** 1** 10** 1 10
ns
t
PHL
A
or
B
B
or
A
C
L
=
15
pF
5.8** 8.4** 1** 10** 1 10
ns
t
PZH
OE
AorB
C
L
=15
p
F
8.5** 13.2** 1** 15.5** 1 15.5
ns
t
PZL
OE
A
or
B
C
L
=
15
pF
8.5** 13.2** 1** 15.5** 1 15.5
ns
t
PHZ
OE
AorB
C
L
=15
p
F
8.9** 12.5** 1** 15.5** 1 15.5
ns
t
PLZ
OE
A
or
B
C
L
=
15
pF
8.9** 12.5** 1** 15.5** 1 15.5
ns
t
PLH
AorB
BorA
C
L
=50
p
F
8.3 11.9 1 13.5 1 13.5
ns
t
PHL
A
or
B
B
or
A
C
L
=
50
pF
8.3 11.9 1 13.5 1 13.5
ns
t
PZH
OE
AorB
C
L
=50
p
F
11 16.7 1 19 1 19
ns
t
PZL
OE
A
or
B
C
L
=
50
pF
11 16.7 1 19 1 19
ns
t
PHZ
OE
AorB
C
L
=50
p
F
11.5 15.8 1 18 1 18
ns
t
PLZ
OE
A
or
B
C
L
=
50
pF
11.5 15.8 1 18 1 18
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 SN54AHC245 SN74AHC245
UNIT
PARAMETER
(INPUT) (OUTPUT) CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
AorB
BorA
C
L
=15
p
F
4* 5.5* 1* 6.5* 1 6.5
ns
t
PHL
A
or
B
B
or
A
C
L
=
15
pF
4* 5.5* 1* 6.5* 1 6.5
ns
t
PZH
OE
AorB
C
L
=15
p
F
5.8* 8.5* 1* 10* 1 10
ns
t
PZL
OE
A
or
B
C
L
=
15
pF
5.8* 8.5* 1* 10* 1 10
ns
t
PHZ
OE
AorB
C
L
=15
p
F
5.6* 7.8* 1* 9.2* 1 9.2
ns
t
PLZ
OE
A
or
B
C
L
=
15
pF
5.6* 7.8* 1* 9.2* 1 9.2
ns
t
PLH
AorB
BorA
C
L
=50
p
F
5.5 7.5 1 8.5 1 8.5
ns
t
PHL
A
or
B
B
or
A
C
L
=
50
pF
5.5 7.5 1 8.5 1 8.5
ns
t
PZH
OE
AorB
C
L
=50
p
F
7.3 10.6 1 12 1 12
ns
t
PZL
OE
A
or
B
C
L
=
50
pF
7.3 10.6 1 12 1 12
ns
t
PHZ
OE
AorB
C
L
=50
p
F
7 9.7 1 11 1 11
ns
t
PLZ
OE
A
or
B
C
L
=
50
pF
7 9.7 1 11 1 11
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.