Datasheet

SN54AHCT157, SN74AHCT157
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
SCLS347K – MAY 1996 – REVISED JULY 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
T
A
= 25°C SN54AHCT157 SN74AHCT157
UNIT
PARAMETER
TEST
CONDITIONS
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
V
I
OH
= –50 A
45V
4.4 4.5 4.4 4.4
V
V
OH
I
OH
= –8 mA
4
.
5
V
3.94 3.8 3.8
V
V
I
OL
= 50 A
45V
0.1 0.1 0.1
V
V
OL
I
OL
= 8 mA
4
.
5
V
0.36 0.44 0.44
V
I
I
V
I
= 5.5 V or GND 0 V to 5.5 V ±0.1 ±1* ±1 A
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 2 20 20 A
∆I
CC
†
One input at 3.4 V,
Other inputs at V
CC
or GND
5.5 V 1.35 1.5 1.5 A
C
i
V
I
= V
CC
or GND 5 V 2 10 10 pF
* On products compliant to MIL-PRF-38535, this parameter is not production tested at V
CC
= 0 V.
†
This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or V
CC
.
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 SN54AHCT157 SN74AHCT157
UNIT
PARAMETER
(INPUT) (OUTPUT) CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
AorB
Y
C
L
=15
p
F
4.1** 6.4** 1** 7.5** 1 7.5
ns
t
PHL
A
or
B
Y
C
L
=
15
pF
4.1** 6.4** 1** 7.5** 1 7.5
ns
t
PLH
A/B
Y
C
L
=15
p
F
5.3** 8.1** 1** 9.5** 1 9.5
ns
t
PHL
A/B
Y
C
L
=
15
pF
5.3** 8.1** 1** 9.5** 1 9.5
ns
t
PLH
G
Y
C
L
=15
p
F
5.6** 8.6** 1** 10** 1 10
ns
t
PHL
G
Y
C
L
=
15
pF
5.6** 8.6** 1** 10** 1 10
ns
t
PLH
AorB
Y
C
L
=50
p
F
5.6 8.7 1 10.8 1 9.8
ns
t
PHL
A
or
B
Y
C
L
=
50
pF
5.6 8.7 1 10.8 1 9.8
ns
t
PLH
A/B
Y
C
L
=50
p
F
6.8 10.4 1 13.2 1 12
ns
t
PLH
A/B
Y
C
L
=
50
pF
6.8 10.4 1 13.2 1 12
ns
t
PLH
G
Y
C
L
=50
p
F
7.1 11 1 13.5 1 12
ns
t
PHL
G
Y
C
L
=
50
pF
7.1 11 1 13.5 1 12
ns
** 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 (see Note 4)
PARAMETER
SN74AHCT157
UNIT
PARAMETER
MIN TYP MAX
UNIT
V
OL(P)
Quiet output, maximum dynamic V
OL
0.4 0.8 V
V
OL(V)
Quiet output, minimum dynamic V
OL
–0.4 –0.8 V
V
OH(V)
Quiet output, minimum dynamic V
OH
4.8 V
V
IH(D)
High-level dynamic input voltage 2 V
V
IL(D)
Low-level dynamic input voltage 0.8 V
NOTE 4: Characteristics are for surface-mount packages only.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.