74LCX540 查看數據表（PDF） - STMicroelectronics

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74LCX540

LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS

STMicroelectronics 

74LCX540

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

PIN No

1, 19

2, 3, 4, 5, 6,

7, 8, 9

18, 17, 16,

15, 14, 13,

12, 11

10

20

SYMBOL

G1, G2

A1 to A8

NAME AND FUNCTION

Output Enable Inputs

Data Inputs

Y1 to Y8 Data Outputs

GND

VCC

Ground (0V)

Positive Supply Voltage

INPUT

G1

G2

H

X

X

H

L

L

L

L

X : Don’t Care

Z : High Impedance

OUTPUT

An

Yn

X

Z

X

Z

H

L

L

H

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

VCC Supply Voltage

-0.5 to +7.0

V

VI

DC Input Voltage

-0.5 to +7.0

V

VO

DC Output Voltage (OFF State)

-0.5 to +7.0

V

VO

DC Output Voltage (High or Low State) (note 1)

-0.5 to VCC + 0.5

V

IIK

DC Input Diode Current

- 50

mA

IOK

DC Output Diode Current (note 2)

- 50

mA

IO

DC Output Current

± 50

mA

ICC

DC Supply Current per Supply Pin

± 100

mA

IGND DC Ground Current per Supply Pin

± 100

mA

Tstg Storage Temperature

-65 to +150

°C

TL

Lead Temperature (10 sec)

300

°C

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is

not implied

1) IO absolute maximum rating must be observed

2) VO < GND

2/9

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