74HC251 查看數據表（PDF） - NXP Semiconductors.
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74HC251 Datasheet PDF : 18 Pages
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Nexperia
74HC251; 74HCT251
8-input multiplexer; 3-state
8. Recommended operating conditions
Table 5. Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol Parameter
Conditions
VCC
VI
VO
Tamb
t/V
supply voltage
input voltage
output voltage
ambient temperature
input transition rise and fall rate
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
9. Static characteristics
74HC251
Min Typ Max
2.0 5.0 6.0
0
-
VCC
0
-
VCC
40 +25 +125
-
-
625
-
1.67 139
-
-
83
74HCT251
Min Typ Max
4.5 5.0 5.5
0
-
VCC
0
-
VCC
40 +25 +125
-
-
-
-
1.67 139
-
-
-
Unit
V
V
V
C
ns/V
ns/V
ns/V
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
Tamb = 25 C
Tamb = 40 C to
+85 C
Min Typ Max Min Max
74HC251
VIH
HIGH-level
VCC = 2.0 V
input voltage VCC = 4.5 V
1.5 1.2 -
1.5
-
3.15 2.4 - 3.15
-
VCC = 6.0 V
4.2 3.2 -
4.2
-
VIL
LOW-level
VCC = 2.0 V
input voltage VCC = 4.5 V
- 0.8 0.5
-
0.5
- 2.1 1.35 -
1.35
VCC = 6.0 V
- 2.8 1.8
-
1.8
VOH
HIGH-level
VI = VIH or VIL
output voltage
IO = 20 A; VCC = 2.0 V 1.9 2.0
-
1.9
-
IO = 20 A; VCC = 4.5 V 4.4 4.5 -
4.4
-
IO = 20 A; VCC = 6.0 V 5.9 6.0 -
5.9
-
IO = 4.0 mA; VCC = 4.5 V 3.98 4.32 -
3.84
-
IO = 5.2 mA; VCC = 6.0 V 5.48 5.81 -
5.34
-
VOL
LOW-level
VI = VIH or VIL
output voltage
IO = 20 A; VCC = 2.0 V
-
0 0.1
-
0.1
IO = 20 A; VCC = 4.5 V
-
0 0.1
-
0.1
IO = 20 A; VCC = 6.0 V
-
0 0.1
-
0.1
IO = 4.0 mA; VCC = 4.5 V
- 0.15 0.26
-
0.33
IO = 5.2 mA; VCC = 6.0 V
- 0.16 0.26
-
0.33
II
input leakage VI = VCC or GND;
current
VCC = 6.0 V
-
- 0.1 -
1.0
IOZ
OFF-state
VI = VIH or VIL;
output current VO = VCC or GND;
VCC = 6.0 V
-
- 0.5 -
5.0
74HC_HCT251
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 1 February 2016
Tamb = 40 C to Unit
+125 C
Min
Max
1.5
-V
3.15
-V
4.2
-V
-
0.5 V
-
1.35 V
-
1.8 V
1.9
-V
4.4
-V
5.9
-V
3.7
-V
5.2
-V
-
0.1 V
-
0.1 V
-
0.1 V
-
0.4 V
-
0.4 V
-
1.0 A
-
10.0 A
.
5 of 18
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