74VHCT257A(2004) 查看數據表（PDF） - STMicroelectronics

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74VHCT257A
(Rev.:2004)

QUAD 2 CHANNEL MULTIPLEXER (3-STATE)

STMicroelectronics 

74VHCT257A

Table 6: DC Specifications

Test Condition

Value

Symbol

Parameter

VIH

VIL

VOH

VOL

IOZ

II

ICC

+ICC

IOPD

High Level Input

Voltage

Low Level Input

Voltage

High Level Output

Voltage

Low Level Output

Voltage

High Impedance

Output Leakage

Current

Input Leakage

Current

Quiescent Supply

Current

Additional Worst

Case Supply

Current

Output Leakage

Current

VCC

(V)

4.5 to

5.5

4.5 to

5.5

4.5

4.5

4.5

4.5

5.5

0 to

5.5

IO=-50 µA

IO=-8 mA

IO=50 µA

IO=8 mA

VI = VIH or VIL

VO = 0V to 5.5V

VI = 5.5V or GND

5.5 VI = VCC or GND

One Input at 3.4V,

5.5 other input at VCC

or GND

0

VOUT = 5.5V

TA = 25°C

-40 to 85°C -55 to 125°C Unit

Min. Typ. Max. Min. Max. Min. Max.

2

2

2

V

0.8

0.8

0.8 V

4.4 4.5

4.4

4.4

V

3.94

3.8

3.7

0.0 0.1

0.36

0.1

0.44

0.1

V

0.55

±0.25

± 2.5

± 2.5 µA

± 0.1

4

± 1.0

40

± 1.0 µA

40 µA

1.35

1.5

1.5 mA

0.5

5.0

5.0 µA

Table 7: AC Electrical Characteristics (Input tr = tf = 3ns)

Symbol

Parameter

Test Condition

VCC (*) CL

(V) (pF)

tPLH Propagation Delay 5.0 15

tPHL Time A, B, to Y

5.0 50

tPLH Propagation Delay 5.0 15

tPHL Time SELECT to Y 5.0 50

tPZL Output Enable

tPZH Time

5.0 15

5.0 50

tPLZ Output Disable

tPHZ Time

5.0 50

(*) Voltage range is 5.0V ± 0.5V

Value

TA = 25°C

-40 to 85°C -55 to 125°C Unit

Min. Typ. Max. Min. Max. Min. Max.

4.8 7.0 1.0 8.0 1.0 8.0

ns

5.5 8.0 1.0 9.0 1.0 9.0

6.0 6.8 1.0 8.0 1.0 8.0

ns

7.0 8.8 1.0 10.0 1.0 10.0

5.8 6.8 1.0 8.0 1.0 8.0

ns

6.5 8.8 1.0 10.0 1.0 10.0

5.7 7.9 1.0 9.0 1.0 9.0 ns

4/13

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