74LVC_LVCH244A_6

© NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 06 — 13 August 2009

5 of 18

NXP Semiconductors

74LVC244A; 74LVCH244A

Octal buffer/line driver; 3-state

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]

The minimum input voltage ratings may be exceeded if the input current ratings are observed.

[2]

The output voltage ratings may be exceeded if the output current ratings are observed.

[3]

For SO20 packages: above 70

°C derate linearly with 8 mW/K.

For (T)SSOP20 packages: above 60

°C derate linearly with 5.5 mW/K.

For DHVQFN20 and DHXQFN20U packages: above 60

°C derate linearly with 4.5 mW/K.

Table 3.

Function table [1]

Control

Input

Output

nOE

nAn

nYn

LLL

LH

H

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

+6.5

V

input clamping current

−50

-

mA

input voltage

[1]

−0.5

+6.5

V

output clamping current

-

±50

mA

output voltage

output HIGH or LOW

[2]

−0.5

V

output 3-state

[2]

−0.5

+6.5

V

output current

-

±50

mA

supply current

-

100

mA

ground current

−100

-

mA

storage temperature

−65

+150

°C

total power dissipation

[3] -

500

mW