Nexperia

74HC238; 74HCT238

3-to-8 line decoder/demultiplexer

6. Functional description

Table 3. Function table

H = HIGH voltage level; L = LOW voltage level; X = don’t care.

Inputs

Outputs

E1

E2

E3

A0

A1

A2

Y0

Y1

Y2

Y3

Y4

Y5

Y6

Y7

H

X

X

X

X

X

L

L

L

L

L

L

L

L

X

H

X

X

X

X

L

L

L

L

L

L

L

L

X

X

L

X

X

X

L

L

L

L

L

L

L

L

L

L

H

L

L

L

H

L

L

L

L

L

L

L

L

L

H

H

L

L

L

H

L

L

L

L

L

L

L

L

H

L

H

L

L

L

H

L

L

L

L

L

L

L

H

H

H

L

L

L

L

H

L

L

L

L

L

L

H

L

L

H

L

L

L

L

H

L

L

L

L

L

H

H

L

H

L

L

L

L

L

H

L

L

L

L

H

L

H

H

L

L

L

L

L

L

H

L

L

L

H

H

H

H

L

L

L

L

L

L

L

H

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

-

±25

mA

ICC

supply current

-

50

mA

IGND

ground current

-50

-

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 SOT109-1 (SO16) package: Ptot derates linearly with 12.4 mW/K above 110 °C.

For SOT403-1 (TSSOP16) package: Ptot derates linearly with 8.5 mW/K above 91 °C.

For SOT763-1 (DHVQFN16) package: Ptot derates linearly with 11.2 mW/K above 106 °C.

74HC_HCT238

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 7 — 2 September 2021

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