Datasheet

SN54AHC157
SN74AHC157
www.ti.com SCLS345J –MAY 1996–REVISED JUNE 2013
SWITCHING CHARACTERISTICS
over recommended operating free-air temperature range, V
CC
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
T
A
= –40°C TO
T
A
= –55°C TO T
A
= –40°C TO
125°C
125°C 85°C
T
A
= 25°C
FROM TO LOAD
Recommended
PARAMETER UNIT
(INPUT) (OUTPUT) CAPACITANCE
SN54AHC157 SN74AHC157 SN74AHC157
TYP MAX MIN MAX MIN MAX MIN MAX
t
PLH
4.1
(1)
6.4
(1)
1
(1)
7.5
(1)
1 7.5 1 7.5
A or B Y C
L
= 15 pF ns
t
PHL
4.1
(1)
6.4
(1)
1
(1)
7.5
(1)
1 7.5 1 7.5
t
PLH
5.3
(1)
8.1
(1)
1
(1)
9.5
(1)
1 9.5 1 9.5
A/B Y C
L
= 15 pF ns
t
PHL
5.3
(1)
8.1
(1)
1
(1)
9.5
(1)
1 9.5 1 9.5
t
PLH
5.6
(1)
8.6
(1)
1
(1)
10
(1)
1 10 1 10
G Y C
L
= 15 pF ns
t
PHL
5.6
(1)
8.6
(1)
1
(1)
10
(1)
1 10 1 10
t
PLH
5.6
(1)
8.4
(1)
1
(1)
9.5
(1)
1 9.5 1 9.5
A or B Y C
L
= 50 pF ns
t
PHL
5.6
(1)
8.4
(1)
1
(1)
9.5
(1)
1 9.5 1 9.5
t
PLH
6.8
(1)
10.1
(1)
1
(1)
11.5
(1)
1 11.5 1 11.5
A/B Y C
L
= 50 pF ns
t
PHL
6.8
(1)
10.1
(1)
1
(1)
11.5
(1)
1 11.5 1 11.5
t
PLH
7.1
(1)
10.6
(1)
1
(1)
12
(1)
1 12 1 12
G Y C
L
= 50 pF ns
t
PHL
7.1
(1)
10.6
(1)
1
(1)
12
(1)
1 12 1 12
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested.
NOISE CHARACTERISTICS
V
CC
= 5 V, C
L
= 50 pF, T
A
= 25°C
(1)
SN74AHC157 UNIT
PARAMETER
MIN TYP MAX
V
OL(P)
Quiet output, maximum dynamic V
OL
0.8 V
V
OL(V)
Quiet output, minimum dynamic V
OL
–0.8 V
V
OH(V)
Quiet output, minimum dynamic V
OH
4.8 V
V
IH(D)
High-level dynamic input voltage 3.5 V
V
IL(D)
Low-level dynamic input voltage 1.5 V
(1) Characteristics are for surface-mount packages only.
OPERATING CHARACTERISTICS
V
CC
= 5 V, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance No load, f = 1 MHz 11 pF
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