74HC257 查看數據表（PDF） - NXP Semiconductors.
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74HC257 Datasheet PDF : 17 Pages
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NXP Semiconductors
74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
9. Static characteristics
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
25 °C
−40 °C to −40 °C to Unit
+85 °C
+125 °C
Min Typ Max Min Max Min Max
74HC257
VIH
HIGH-level
input voltage
VIL
LOW-level
input voltage
VOH
HIGH-level
output voltage
VOL
LOW-level
output voltage
II
input leakage current
IOZ
OFF-state
output current
ICC
supply current
Ci
input capacitance
74HCT257
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
VI = VIH or VIL
IO = −20 μA; VCC = 2.0 V
IO = −20 μA; VCC = 4.5 V
IO = −20 μA; VCC = 6.0 V
IO = −6.0 mA; VCC = 4.5 V
IO = −7.8 mA; VCC = 6.0 V
VI = VIH or VIL
IO = 20 μA; VCC = 2.0 V
IO = 20 μA; VCC = 4.5 V
IO = 20 μA; VCC = 6.0 V
IO = 6.0 mA; VCC = 4.5 V
IO = 7.8 mA; VCC = 6.0 V
VI = VCC or GND; VCC = 6.0 V
VI = VIH or VIL;
VO = VCC or GND;
VCC = 6.0 V
VI = VCC or GND; IO = 0 A;
VCC = 6.0 V
1.5 1.2 - 1.5 - 1.5 - V
3.15 2.4 - 3.15 - 3.15 - V
4.2 3.2 - 4.2 - 4.2 - V
- 0.8 0.5 - 0.5 - 0.5 V
- 2.1 1.35 - 1.35 - 1.35 V
- 2.8 1.8 - 1.8 - 1.8 V
1.9 2.0 - 1.9 - 1.9 - V
4.4 4.5 - 4.4 - 4.4 - V
5.9 6.0 - 5.9 - 5.9 - V
3.98 4.32 - 3.84 - 3.7 - V
5.48 5.81 - 5.34 - 5.2 - V
-
0 0.1 - 0.1 -
0.1 V
-
0 0.1 - 0.1 -
0.1 V
-
0 0.1 - 0.1 -
0.1 V
- 0.15 0.26 - 0.33 - 0.4 V
- 0.16 0.26 - 0.33 - 0.4 V
-
- ±0.1 - ±1.0 ±1.0 ±1.0 μA
-
- ±0.5 - ±5.0 ±10.0 ±10.0 μA
-
- 8.0 - 80 160 160 μA
- 3.5 -
pF
VIH
HIGH-level
input voltage
VCC = 4.5 V to 5.5 V
2.0 1.6 - 2.0 - 2.0 - V
VIL
LOW-level
input voltage
VCC = 4.5 V to 5.5 V
- 1.2 0.8 - 0.8 - 0.8 V
VOH
HIGH-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = −20 μA
IO = −6 mA
VOL
LOW-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 20 μA
IO = 6.0 mA
II
input leakage current VI = VCC or GND; VCC = 5.5 V
4.4 4.5 - 4.4 - 4.4 - V
3.98 4.32 - 3.84 - 3.7 - V
- 0.1 - 0.1
-
0 0.1 - 0.33 -
0.4 V
- 0.15 0.26 - ±1.0 - ±1.0 V
-
- ±0.1 - ±5.0 - ±10 μA
74HC_HCT257_5
Product data sheet
Rev. 05 — 13 January 2010
© NXP B.V. 2010. All rights reserved.
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