Datasheet

SN54ALS541, SN74ALS540, SN74ALS541
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS025D – APRIL 1982 – REVISED MARCH 2002
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS
SN54ALS541
SN74ALS540
SN74ALS541
UNIT
MIN TYP
‡
MAX MIN TYP
‡
MAX
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 –1.2 V
V
CC
= 4.5 V to 5.5 V, I
OH
= –0.4 mA V
CC
–2 V
CC
–2
V
OH
I
OH
= –3 mA 2.4 3.2 2.4 3.2
V
V
OH
V
CC
= 4.5 V
I
OH
= –12 mA 2
V
I
OH
= –15 mA 2
I
OL
= 12 mA 0.25 0.4 0.25 0.4
V
OL
V
CC
= 4.5 V
I
OL
= 24 mA 0.35 0.5
V
I
OL
= 48 mA
†
0.35 0.5
I
OZH
V
CC
= 5.5 V, V
O
= 2.7 V 20 20 µA
I
OZL
V
CC
= 5.5 V, V
O
= 0.4 V –20 –20 µA
I
I
V
CC
= 5.5 V, V
I
= 7 V 0.1 0.1 mA
I
IH
V
CC
= 5.5 V, V
I
= 2.7 V 20 20 µA
I
IL
V
CC
= 5.5 V, V
I
= 0.4 V –0.2 –0.1 mA
I
O
§
V
CC
= 5.5 V, V
O
= 2.25 V –20 –112 –30 –112 mA
Outputs high 5 10
SN74ALS540 V
CC
= 5.5 V
Outputs low 13 22
I
CC
Outputs disabled 11 19
mA
I
CC
Outputs high 6 14 6 14
mA
’ALS541 V
CC
= 5.5 V
Outputs low 15 25 15 25
Outputs disabled 13.5 32 13.5 22
†
Applies only to the -1 version and only if V
CC
is between 4.75 V and 5.25 V
‡
All typical values are at V
CC
= 5 V, T
A
= 25°C.
§
The output conditions have been chosen to produce a current that closely approximates one-half of the true short-circuit output current, I
OS
.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 4.5 V to 5.5 V,
C
L
= 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
T
A
= MIN to MAX
¶
UNIT
SN54ALS541 SN74ALS540 SN74ALS541
MIN MAX MIN MAX MIN MAX
t
PLH
A
Y
4 17 2 12 4 14
ns
t
PHL
A
Y
2 14 2 9 2 10
ns
t
PZH
OE
Y
5 18 5 15 5 15
ns
t
PZL
OE
Y
8 28 8 20 8 20
ns
t
PHZ
OE
Y
1 12 1 10 1 10
ns
t
PLZ
OE
Y
2 14 2 12 2 12
ns
¶
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.