SN74AHCT240Q1

OCTAL BUFFER/DRIVER

WITH 3STATE OUTPUTS

SCLS582B − APRIL 2004 − REVISED APRIL 2008

3

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

MIN

MAX

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

UNIT

VOH

IOH = −50 mA

4.5 V

4.4

4.5

4.4

V

VOH

IOH = −8 mA

4.5 V

3.94

3.8

V

VOL

IOL = 50 mA

4.5 V

0.1

0.1

V

VOL

IOL = 8 mA

4.5 V

0.36

0.44

V

IOZ

VO = VCC or GND

5.5 V

±0.25

±2.5

mA

II

VI = 5.5 V or GND

0 V to 5.5 V

±0.1

±1

mA

ICC

VI = VCC or GND,

IO = 0

5.5 V

4

40

mA

∆ICC†

One input at 3.4 V,

Other inputs at VCC or GND

5.5 V

1.35

1.5

mA

Ci

VI = VCC or GND

5 V

2.5

10

10

pF

Co

VO = VCC or GND

5 V

3

pF

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

switching characteristics over recommended operating free-air temperature range,

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

PARAMETER

FROM

TO

LOAD

TA = 25°C

MIN

MAX

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

LOAD

CAPACITANCE

MIN

TYP

MAX

MIN

MAX

UNIT

tPLH

A

Y

CL = 15 pF

5.4

7.4

1

8.5

ns

tPHL

A

Y

CL = 15 pF

5.4

7.4

1

8.5

ns

tPZH

OE

Y

CL = 15 pF

7.7

10.4

1

12

ns

tPZL

OE

Y

CL = 15 pF

7.7

10.4

1

12

ns

tPHZ

OE

Y

CL = 15 pF

8.3

10.4

1

12

ns

tPLZ

OE

Y

CL = 15 pF

8.3

10.4

1

12

ns

tPLH

A

Y

CL = 50 pF

5.9

8.4

1

9.5

ns

tPHL

A

Y

CL = 50 pF

5.9

8.4

1

9.5

ns

tPZH

OE

Y

CL = 50 pF

8.2

11.4

1

13

ns

tPZL

OE

Y

CL = 50 pF

8.2

11.4

1

13

ns

tPHZ

OE

Y

CL = 50 pF

8.8

11.4

1

13

ns

tPLZ

OE

Y

CL = 50 pF

8.8

11.4

1

13

ns

tsk(o)

CL = 50 pF

1

1

ns

noise characteristics, VCC = 5 V, CL = 50 pF, TA = 25°C (see Note 4)

PARAMETER

MIN

TYP

MAX

UNIT

VOH(V)

Quiet output, minimum dynamic VOH

4.1

V

VIH(D)

High-level dynamic input voltage

2

V

VIL(D)

Low-level dynamic input voltage

0.8

V

NOTE 4: Characteristics are for surface-mount packages only.

operating characteristics, VCC = 5 V, TA = 25°C

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance

No load,

f = 1 MHz

10

pF