Datasheet

SN54AHC138, SN74AHC138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SCLS258L − DECEMBER 1995 − 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
T
A
= 25°C SN54AHC138 SN74AHC138
UNIT
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
2 V 1.9 2 1.9 1.9
I
OH
= −50 mA
3 V 2.9 3 2.9 2.9
V
OH
I
OH
50
mA
4.5 V 4.4 4.5 4.4 4.4
V
V
OH
I
OH
= −4 mA
3 V 2.58 2.48 2.48
V
I
OH
= −8 mA
4.5 V 3.94 3.8 3.8
2 V 0.1 0.1 0.1
I
OL
= 50 mA
3 V 0.1 0.1 0.1
V
OL
I
OL
50
mA
4.5 V 0.1 0.1 0.1
V
V
OL
I
OL
= 4 mA
3 V 0.36 0.5 0.44
V
I
OL
= 8 mA
4.5 V 0.36 0.5 0.44
I
I
V
I
= 5.5 V or GND 0 V to 5.5 V ±0.1 ±1* ±1 mA
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 4 40 40 m 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.
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 SN54AHC138 SN74AHC138
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
LOAD
CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
ABC
Any Y
C 15 pF
8.2** 11.4** 1** 13** 1 13
ns
t
PHL
A, B, C Any Y C
L
= 15 pF
8.2** 11.4** 1** 13** 1 13
ns
t
PLH
G1
Any Y
C 15 pF
8.1** 12.8** 1** 15** 1 15
ns
t
PHL
G1 Any Y C
L
= 15 pF
8.1** 12.8** 1** 15** 1 15
ns
t
PLH
G2A G2B
Any Y
C 15 pF
8.2** 11.4** 1** 13.5** 1 13.5
ns
t
PHL
G2A, G2B
Any Y C
L
= 15 pF
8.2** 11.4** 1** 13.5** 1 13.5
ns
t
PLH
ABC
Any Y
C 50 pF
10 15.8 1 18 1 18
ns
t
PHL
A, B, C Any Y C
L
= 50 pF
10 15.8 1 18 1 18
ns
t
PLH
G1
Any Y
C 50 pF
10.6 16.3 1 18.5 1 18.5
ns
t
PHL
G1 Any Y C
L
= 50 pF
10.6 16.3 1 18.5 1 18.5
ns
t
PLH
G2A G2B
Any Y
C =50pF
10.7 14.9 1 17 1 17
ns
t
PHL
G2A, G2B
Any Y C
L
= 50 pF
10.7 14.9 1 17 1 17
ns
** On products compliant to MIL-PRF-38535, this parameter is not production tested.