Datasheet

   
    
        
SDLS053B − OCTOBER 1976 − REVISED MAY 2004
9
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
SN54148, SN74148 switching characteristics, V
CC
= 5 V, T
A
= 255C (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
WAVEFORM
TEST
CONDITIONS
MIN TYP MAX UNIT
t
PLH
1–7
A0, A1, or A2
In-phase output
10 15
ns
t
PHL
1–7 A0, A1, or A2 In-phase output
9 14
ns
t
PLH
1–7
A0, A1, or A2
Out-of-phase output
13 19
ns
t
PHL
1–7 A0, A1, or A2 Out-of-phase output
12 19
ns
t
PLH
0–7
EO
Out-of-phase output
6 10
ns
t
PHL
0–7 EO Out-of-phase output
14 25
ns
t
PLH
0–7
GS
In-phase output
C
L
= 15 pF,
18 30
ns
t
PHL
0–7 GS In-phase output
C
L
= 15 pF,
R
L
= 400
14 25
ns
t
PLH
EI
A0, A1, or A2
In-phase output
R
L
= 400
10 15
ns
t
PHL
EI A0, A1, or A2 In-phase output
10 15
ns
t
PLH
EI
GS
In-phase output
8 12
ns
t
PHL
EI GS In-phase output
10 15
ns
t
PLH
EI
EO
In-phase output
10 15
ns
t
PHL
EI
EO
In-phase output
17 30
ns
t
PLH
= propagation delay time, low-to-high-level output.
t
PHL
= propagation delay time, high-to-low-level output.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
TEST CONDITIONS
SN54LS’ SN74LS’
UNIT
TEST CONDITIONS
MIN TYP
MAX MIN TYP
MAX
UNIT
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.7 0.8 V
V
IK
Input clamp voltage V
CC
= MIN, I
I
= −18 mA −1.5 −1.5 V
V
OH
High-level output voltage
V
CC
= MIN,
V
IL
= 0.8 V,
V
IH
= 2 V,
I
OH
= −400 µA
2.5 3.4 2.7 3.4 V
V
OL
Low-level output voltage
V
CC
= MIN,
V
IH
= 2 V,
I
OL
= 4 mA 0.25 0.4 0.25 0.4
V
V
OL
Low-level output voltage
CC
V
IH
= 2 V,
V
IL
= V
IL
MAX
I
OL
= 8 mA 0.35 0.5
V
I
I
Input current at
maximum input
’LS148 inputs 1–7
V
CC
= MAX,
V
I
= 7 V
0.2 0.2
mA
I
I
maximum input
voltage
All other inputs
V
CC
= MAX, V
I
= 7 V
0.1 0.1
mA
I
IH
High-level input
’LS148 inputs 1–7
V
CC
= MAX,
V
I
= 2.7 V
40 40
A
I
IH
High-level input
current
All other inputs
V
CC
= MAX, V
I
= 2.7 V
20 20
µA
I
IL
Low-level input
’LS148 inputs 1–7
V
CC
= MAX,
V
I
= 0.4 V
−0.8 −0.8
mA
I
IL
Low-level input
current
All other inputs
V
CC
= MAX, V
I
= 0.4 V
−0.4 −0.4
mA
I
OS
Short-circuit output current
§
V
CC
= MAX −20 −100 −20 −100 mA
I
CC
Supply current
V
CC
= MAX
Condition 1 12 20 12 20
mA
I
CC
Supply current
V
CC
= MAX
(See Note 6)
Condition 2 10 17 10 17
mA
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
All typical values are at V
CC
= 5 V, T
A
= 25°C.
§
Not more than one output should be shorted at a time.
NOTE 6: For ’LS147, I
CC
(Condition 1) is measured with input 7 grounded, other inputs and outputs open; I
CC
(Condition 2) is measured with
all inputs and outputs open. For ’LS148, I
CC
(Condition 1) is measured with inputs 7 and EI grounded, other inputs and outputs open;
I
CC
(Condition 2) is measured with all inputs and outputs open.