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Philips Semiconductors
Product specification
74F1240
Octal inverter buffer (3-State)
5
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS
1
LIMITS
UNIT
MIN
TYP
2
MAX
= 3mA
I
OH
= –3mA
±
10% V
CC
±
5% V
CC
±
10% V
CC
±
5% V
CC
2.4
V
V
OH
High level output voltage
High-level output voltage
V
CC
= MIN
V
IL
= MAX
V
IH
= MIN
2.7
3.3
V
= 15mA
I
OH
= –15mA
2.0
V
2.0
V
V
OL
Low level output voltage
Low-level output voltage
V
CC
= MIN
V
IL
= MAX
V
IH
= MIN
I
OL
= 48mA
±
10% V
CC
0.38
0.55
V
I
OL
= 64mA
±
5% V
CC
0.42
0.55
V
V
IK
I
I
I
IH
I
IL
Input clamp voltage
V
CC
= MIN, I
I
= I
IK
V
CC
= 0.0V, V
I
= 7.0V
V
CC
= MAX, V
I
= 2.7V
V
CC
= MAX, V
I
= 0.5V
–0.73
–1.2
V
Input current at maximum input voltage
100
μ
A
μ
A
μ
A
High-level input current
20
Low-level input current
–20
I
OZH
Off-state output current,
High-level voltage applied
V
CC
= MAX, V
O
= 2.7V
50
μ
A
I
OZL
Off-state output current,
Low-level voltage applied
Short-circuit output current
3
V
CC
= MAX, V
O
= 0.5V
–50
μ
A
I
OS
V
CC
= MAX
–100
–225
mA
I
CCH
I
CCL
I
CCZ
22
30
mA
I
CC
Supply current (total)
V
CC
= MAX
58
75
mA
44
58
mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
= 5V, T
= 25
°
C.
3. Not more than one output should be shorted at a time. For testing I
, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I
OS
tests should be performed last.
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST
CONDITION
T
amb
= +25
°
C
V
CC
= +5.0V
C
L
= 50pF, R
L
= 500
T
amb
= 0
°
C to +70
°
C
V
CC
= +5.0V
±
10%
C
L
= 50pF, R
L
= 500
UNIT
MIN
TYP
MAX
MIN
MAX
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation delay
Ian, Ibn, to Yn
Waveform 1
3.0
1.5
4.5
2.5
6.5
4.5
2.5
1.5
7.5
5.0
ns
ns
Output Enable time
to High or Low level
Waveform 3
Waveform 4
3.0
4.0
5.5
7.0
7.5
9.0
3.0
4.0
8.0
9.5
ns
ns
Output Disable time
to High or Low level
Waveform 3
Waveform 4
2.0
2.0
4.0
4.0
6.0
5.5
2.0
2.0
6.5
6.0
ns
ns
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