SN54HCT540, SN74HCT540

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SCLS008C – MARCH 1984 – REVISED MARCH 2003

3

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

SN54HCT540

SN74HCT540

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

VOH

VI =VIH or VIL

IOH = –20 µA

45 V

4.4

4.499

4.4

4.4

V

VOH

VI = VIH or VIL

IOH = –6 mA

4.5 V

3.98

4.3

3.7

3.84

V

VOL

VI =VIH or VIL

IOL = 20 µA

45 V

0.001

0.1

0.1

0.1

V

VOL

VI = VIH or VIL

IOL = 6 mA

4.5 V

0.17

0.26

0.4

0.33

V

II

VI = VCC or 0

5.5 V

±0.1

±100

±1000

±1000

nA

IOZ

VO = VCC or 0,

VI = VIH or VIL

5.5 V

±0.01

±0.5

±10

±5

µA

ICC

VI = VCC or 0,

IO = 0

5.5 V

8

160

80

µA

∆ICC†

One input at 0.5 V or 2.4 V,

Other inputs at 0 or VCC

5.5 V

1.4

2.4

3

2.9

mA

Ci

4.5 V

to 5.5 V

3

10

10

10

pF

† 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.

(unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

VCC

TA = 25°C

SN54HCT540

SN74HCT540

UNIT

PARAMETER

(INPUT)

(OUTPUT)

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

t d

A

Y

4.5 V

13

20

30

25

ns

tpd

A

Y

5.5 V

12

18

27

23

ns

t

OE

Y

4.5 V

20

30

45

38

ns

ten

OE

Y

5.5 V

18

27

41

34

ns

tdi

OE

Y

4.5 V

19

30

45

38

ns

tdis

OE

Y

5.5 V

18

27

41

34

ns

tt

Y

4.5 V

8

12

18

15

ns

tt

Y

5.5 V

7

11

16

14

ns

(unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

VCC

TA = 25°C

SN54HCT540

SN74HCT540

UNIT

PARAMETER

(INPUT)

(OUTPUT)

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

t d

A

Y

4.5 V

20

30

45

38

ns

tpd

A

Y

5.5 V

19

27

41

34

ns

t

OE

Y

4.5 V

26

40

60

50

ns

ten

OE

Y

5.5 V

25

36

54

45

ns

tt

Y

4.5 V

17

42

63

53

ns

tt

Y

5.5 V

14

38

57

48

ns

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance per buffer/driver

No load

35

pF