74HC_HCT240

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© NXP Semiconductors N.V. 2016. All rights reserved.

Product data sheet

Rev. 4 — 25 February 2016

4 of 17

NXP Semiconductors

74HC240; 74HCT240

Octal buffer/line driver; 3-state; inverting

6.

Functional description

[1]

H = HIGH voltage level;

L = LOW voltage level;

X = don’t care;

Z = high-impedance OFF-state.

7.

Limiting values

[1]

For SO20 packages: above 70

C, P

tot derates linearly with 8 mW/K.

For SSOP20 and TSSOP20 packages: above 60

C, P

tot derates linearly with 5.5 mW/K.

For DHVQFN20 packages: above 60

C, P

tot derates linearly with 4.5 mW/K.

8.

Recommended operating conditions

Table 3.

Function table[1]

Input

Output

nOE

nAn

nYn

LLH

LH

L

HX

Z

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

-

20

mA

IOK

output clamping current

VO < 0.5 V or VO >VCC +0.5 V

-

20

mA

IO

output current

0.5 V < V

O < 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

SO20, SSOP20, TSSOP20 and

DHVQFN20 packages

[1]

-500

mW

Table 5.

Recommended operating conditions

Symbol Parameter

Conditions

74HC240

74HCT240

Unit

Min

Typ

Max

Min

Typ

Max

VCC

supply voltage

2.0

5.0

6.0

4.5

5.0

5.5

V

VI

input voltage

0

-

VCC

0-

VCC

V

VO

output voltage

0

-

VCC

0-

VCC

V

t/V

input transition rise and

fall rate

VCC = 2.0 V

-

-

625

-

-

-

ns/V

VCC = 4.5 V

-

1.67

139

-

1.67

139

ns/V

VCC =6.0 V

-

-

83

-

-

-

ns/V

Tamb

ambient temperature

40

+25

+125

40

+25

+125

C