74AHC_AHCT244_5

Product data sheet

Rev. 05 — 20 December 2007

4 of 16

Nexperia

74AHC244; 74AHCT244

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

[2]

Ptot derates linearly with 8 mW/K above 70 °C.

[3]

Ptot derates linearly with 5.5 mW/K above 60 °C.

[4]

Ptot derates linearly with 4.5 mW/K above 60 °C.

Table 3.

Function table[1]

Control

Input

Output

nOE

nAn

nYn

LLL

HH

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

+7.0

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

SO20 package

[2] -

500

mW

TSSOP20 package

[3] -

500

mW

DHVQFN20 package

[4] -

500

mW

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