74LVC244AD datasheet(9/17 Pages) PHILIPS

9 / 17 page

2003 Oct 30

Philips Semiconductors

Product speciﬁcation

Octal buffer/line driver with 5 V tolerant

inputs/outputs (3-state)

74LVC244A; 74LVCH244A

AC CHARACTERISTICS

GND = 0 V; tr =tf ≤ 2.5 ns.

Notes

1. All typical values are measured at VCC = 3.3 V and Tamb =25 °C.

2. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed

by design.

SYMBOL

PARAMETER

TEST CONDITIONS

MIN.

TYP.

MAX.

UNIT

WAVEFORMS

VCC (V)

Tamb = −40 to +85 °C

tPHL/tPLH

propagation delay 1An to 1Yn, 2An to 2Yn see Figs 6 and 8

1.2

−

17.0

−

2.7

1.5

3.3

6.9

3.0 to 3.6

1.5

2.8(1)

5.9

tPZH/tPZL

3-state output enable time 1OE to 1Yn,

2OE to 2Yn

see Figs 7 and 8

1.2

−

24.0

−

2.7

1.5

3.3

8.6

3.0 to 3.6

1.0

3.4(1)

7.6

tPHZ/tPLZ

3-state output disable time 1OE to 1Yn,

2OE to 2Yn

see Figs 7 and 8

1.2

−

9.0

−

2.7

1.5

3.2

6.8

3.0 to 3.6

1.5

2.9(1)

5.8

tsk(0)

skew

note 2

−−

1.0

Tamb = −40 to +125 °C

tPHL/tPLH

propagation delay 1An to 1Yn, 2An to 2Yn see Figs 6 and 8

1.2

−−−

2.7

1.5

−

9.0

3.0 to 3.6

1.5

−

7.5

tPZH/tPZL

3-state output enable time 1OE to 1Yn,

2OE to 2Yn

see Figs 7 and 8

1.2

−−−

2.7

1.5

−

3.0 to 3.6

1.0

−

9.5

tPHZ/tPLZ

3-state output disable time 1OE to 1Yn,

2OE to 2Yn

see Figs 7 and 8

1.2

−−−

2.7

1.5

−

8.5

3.0 to 3.6

1.5

−

7.5

tsk(0)

skew

note 2

−−

1.5

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