Nexperia

74HC540; 74HCT540

Octal buffer/line driver; 3-state; inverting

5.2. Pin description

Table 2. Pin description

Symbol

Pin

Description

OE1

1

output enable input (active LOW)

A0 to A7

2, 3, 4, 5, 6, 7, 8, 9

data input

GND

10

ground (0 V)

Y0 to Y7

18, 17, 16, 15, 14, 13, 12, 11

data output

OE2

19

output enable input (active LOW)

VCC

20

supply voltage

6. Functional description

Table 3. Functional table

H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.

Control

Input

Output

OE1

OE2

An

Yn

L

L

L

H

L

L

H

L

X

H

X

Z

H

X

X

Z

7. Limiting values

Table 4. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).

Symbol Parameter

Conditions

Min

Max

Unit

VCC

supply voltage

-0.5

+7

V

IIK

input clamping current

VI < -0.5 V or VI > VCC + 0.5 V

[1]

-

±20

mA

IOK

output clamping current

VO < -0.5 V or VO > VCC + 0.5 V

[1]

-

±20

mA

IO

output current

-0.5 V < VO < VCC + 0.5 V

-

±35

mA

ICC

supply current

-

70

mA

IGND

ground current

-70

-

mA

Tstg

storage temperature

-65

+150

°C

Ptot

total power dissipation

[2]

-

500

mW

[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

[2] For SOT163-1 (SO20) package: Ptot derates linearly with 12.3 mW/K above 109 °C.

For SOT339-1 (SSOP20) package: Ptot derates linearly with 10.0 mW/K above 100 °C.

For SOT360-1 (TSSOP20) package: Ptot derates linearly with 10.0 mW/K above 100 °C.

74HC_HCT540

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 6 — 19 October 2021

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