74HC_HCT240_3

© NXP B.V. 2007. All rights reserved.

Product data sheet

Rev. 03 — 2 August 2007

4 of 18

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 DIP20 packages: above 70

°C, P

For SO20 packages: above 70

°C, P

For SSOP20 and TSSOP20 packages: above 60

°C, P

For DHVQFN20 packages: above 60

2A0

17

data input

1Y0

18

bus output

2OE

19

output enable input (active LOW)

20

supply voltage

Table 2.

Symbol

Pin

Description

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

supply voltage

−0.5

+7

V

input clamping current

-

±20

mA

output clamping current

-

±20

mA

output current

-

±35

mA

supply current

-

70

mA

ground current

−70

-

mA

storage temperature

−65

+150

°C

total power dissipation

[1]

DIP20 package

-

750

mW

SO20, SSOP20, TSSOP20

and DHVQFN20 packages

-

500

mW