74ALS251N 데이터 시트보기 (PDF) - Philips Electronics
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74ALS251N Datasheet PDF : 8 Pages
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Philips Semiconductors
8-input multiplexer (3-State)
Product specification
74ALS251
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS1
LIMITS
MIN TYP2 MAX
UNIT
VOH
High-level output voltage
VCC±10%, VIL = MAX,
VIH = MIN
IOH = –0.4mA VCC – 2
IOH = –2.6mA
2.4
3.2
V
V
VOL
Low-level output voltage
VCC = MIN, VIL = MAX,
VIH = MIN
IOL = 12mA
IOL = 24mA
0.25 0.40
V
0.35 0.50
V
VIK
Input clamp voltage
VCC = MIN, II = IIK
–0.73 –1.5
V
II
Input current at maximum input voltage VCC = MAX, VI = 7.0V
0.1
mA
IIH
High-level input current
VCC = MAX, VI = 2.7V
20
µA
IIL
Low-level input current
VCC = MAX, VI = 0.4V
–0.1
mA
IOZH
Off-state output current,
High-level voltage applied
VCC = MAX, VI = 2.7V
20
µA
IOZL
Off-state output current,
Low-level voltage applied
VCC = MAX, VI = 0.4V
–20
µA
IO
Output current3
VCC = MAX, VO = 2.25V
–30
–112
mA
ICC
Supply current (total)
ICC
ICCZ VCC = MAX
7.0
10
mA
9.0
14
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 VCC = 5V, Tamb = 25°C.
3. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Propagation delay
In to Y
Propagation delay
In to Y
Propagation delay
Sn to Y
Propagation delay
Sn to Y
Propagation delay
OE to Y
Propagation delay
OE to Y
Propagation delay
OE to Y
Propagation delay
OE to Y
TEST CONDITION
Waveform 2
Waveform 1
Waveform 1, 2
Waveform 1, 2
Waveform 3
Waveform 4
Waveform 3
Waveform 4
Waveform 3
Waveform 4
Waveform 3
Waveform 4
LIMITS
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
MIN
MAX
4.0
12.0
4.0
12.0
3.0
10.0
6.0
15.0
5.0
15.0
7.0
16.0
8.0
17.0
5.0
15.0
2.0
8.0
3.0
9.0
2.0
8.0
1.0
7.0
2.0
8.0
3.0
9.0
2.0
8.0
1.0
7.0
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
1991 Feb 08
4
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