HD74BC244A

Rev.3.00, Jul.16.2004, page 4 of 8

Electrical Characteristics (Ta = –40°C to +85°C)

Item

Symbol

V

Min

Max

Unit

Test Conditions

Input voltage

V

IH

2.0

—

V

V

IL

—0.8

V

Output voltage

V

OH

4.5

2.4

—

V

I

4.5

2.0

—

V

I

V

OL

4.5

—

0.5

V

I

4.5

—

0.55

V

I

Input diode voltage

V

IK

4.5

—

–1.2

V

I

Input current

I

I

5.5

—

–250

µA

V

5.5

—

1.0

µA

V

5.5

—

100

µA

V

Short circuit output current*

1

I

OS

5.5

–100

–225

mA

V

Off state output current

I

OZH

5.5

—

50

µA

V

I

OZL

5.5

—

–50

µA

V

Supply current

I

CCL

5.5

—

29.5

mA

V

All outputs is “L”

I

CCH

5.5

—

0.5

mA

V

All outputs is “H”

I

CCZ

5.5

—

2.5

mA

V

All outputs is “Z”

I

2

5.5

—

1.5

mA

V

Notes : 1. Not more than one output should be shorted at a time and duration of the short circuit should not exceed one

second.

2. When input by the TTL level, it shows I

Switching Test Method (C

Ta = 25°C

V

Ta = –40 to 85°C

V

Item

Symbol

Min

Max

Min

Max

Unit

Test Conditions

Propagation delay time

t

PLH

3.0

6.0

3.0

7.0

ns

See under figure

t

PHL

3.0

6.0

3.0

7.0

Output enable time

t

ZH

3.0

8.0

3.0

10.0

ns

t

ZL

3.0

8.0

3.0

10.0

Output disable time

t

HZ

3.0

7.0

3.0

9.0

ns

t

LZ

3.0

7.0

3.0

9.0

Input capacitanse

C

IN

3.0(Typ)

—

pF

V

Output capacitance

C

O

15.0(Typ)

—

pF

V