Nexperia

74AHCT240

Octal buffer/line driver; inverting; 3-state

5.2. Pin description

Table 2. Pin description

Symbol

Pin

Description

1OE, 2OE

1, 19

output enable input (active LOW)

1A0, 1A1, 1A2, 1A3

2, 4, 6, 8

data input

2A0, 2A1, 2A2, 2A3

17, 15, 13, 11

data input

1Y0, 1Y1, 1Y2, 1Y3

18, 16, 14, 12

data output

2Y0, 2Y1, 2Y2, 2Y3

3, 5, 7, 9

data output

GND

10

ground (0 V)

VCC

20

power supply

6. Functional description

Table 3. Function table

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

Control

Input

Output

nOE

nAn

nYn

L

L

H

L

H

L

H

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

+7.0

V

VI

input voltage

-0.5

+7.0

V

IIK

input clamping current

VI < -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

VO = -0.5 V to (VCC + 0.5 V)

-

±25

mA

ICC

supply current

-

75

mA

IGND

ground current

-75

-

mA

Tstg

storage temperature

-65

+150

°C

Ptot

total power dissipation

Tamb = -40 °C to +125 °C

[2]

-

500

mW

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

For SOT764-1 (DHVQFN20) package: Ptot derates linearly with 12.9 mW/K above 111 °C.

74AHCT240

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© Nexperia B.V. 2020. All rights reserved

Product data sheet

Rev. 6 — 29 June 2020

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