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Electrical Characteristics

Switching Characteristics

Operating Characteristics

SN74ACT244-EP

OCTAL BUFFER/DRIVER

WITH 3-STATE OUTPUTS

SCAS724B – OCTOBER 2003 – REVISED MARCH 2006

over recommended operating free-air temperature range (unless otherwise noted)

TA = 25°C

SN74ACT244M-EP

SN74ACT244I-EP

PARAMETER

TEST CONDITIONS

VCC

UNIT

MIN

TYP

MAX

MIN

MAX

MIN

MAX

4.5 V

4.4

4.49

4.4

4.4

IOH = –50 µA

5.5 V

5.4

5.49

5.4

5.4

VOH

4.5 V

3.86

3.7

3.76

V

IOH = –24 mA

5.5 V

4.86

4.7

4.76

IOH = –75 mA(1)

5.5 V

3.85

4.5 V

0.001

0.1

0.1

0.1

IOL = 50 µA

5.5 V

0.001

0.1

0.1

0.1

VOL

4.5 V

0.36

0.5

0.44

V

IOL = 24 mA

5.5 V

0.36

0.5

0.44

IOL = 75 mA(1)

5.5 V

1.65

IOZ

VO = VCC or GND

5.5 V

±0.25

±5

±2.5

µA

II

VI = VCC or GND

5.5 V

±0.1

±1

±1

µA

ICC

VI = VCC or GND,

IO = 0

5.5 V

4

80

40

µA

One input at 3.4 V,

∆I

CC

(2)

5.5 V

0.6

1.6

1.5

mA

Other inputs at GND or VCC

Ci

VI = VCC or GND

5 V

2.5

pF

Co

VI = VCC or GND

5 V

8

pF

(1)

Not more than one output should be tested at a time, and the duration of the test should not exceed 2 ms.

(2)

This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or VCC.

over recommended operating free-air temperature range, V

CC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)

TA = 25°C

SN74ACT244M-EP

SN74ACT244I-EP

FROM

TO

PARAMETER

UNIT

(INPUT)

(OUTPUT)

MIN

TYP

MAX

MIN

MAX

MIN

MAX

tPLH

2

6.5

9

1

10

1.5

10

A

Y

ns

tPHL

2

7

9

1

10

1.5

10

tPZH

1.5

7

8.5

1

9.5

1

9.5

OE

Y

ns

tPZL

2

7

9.5

1

11

1.5

10.5

tPHZ

2

8

9.5

1

11

1.5

10.5

OE

Y

ns

tPLZ

2.5

7.5

10

1

11.5

2

10.5

V

CC = 5 V, TA = 25°C

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance

CL = 50 pF,

f = 1 MHz

45

pF

3

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