SN54HC640, SN74HC640

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCLS303A – JANUARY 1996 – REVISED MAY 1997

4

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

SN54HC640

SN74HC640

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

2 V

1.9

1.998

1.9

1.9

IOH = –20 µA

4.5 V

4.4

4.499

4.4

4.4

VOH

VI = VIH or VIL

6 V

5.9

5.999

5.9

5.9

V

IOH = –6 mA

4.5 V

3.98

4.3

3.7

3.84

IOH = –7.8 mA

6 V

5.48

5.8

5.2

5.34

2 V

0.002

0.1

0.1

0.1

IOL = 20 µA

4.5 V

0.001

0.1

0.1

0.1

VOL

VI = VIH or VIL

6 V

0.001

0.1

0.1

0.1

V

IOL = 6 mA

4.5 V

0.17

0.26

0.4

0.33

IOL = 7.8 mA

6 V

0.15

0.26

0.4

0.33

II

DIR or OE

VI = VCC or 0

6 V

±0.1

±100

±1000

±1000

nA

IOZ

A or B

VO = VCC or 0

6 V

±0.01

±0.5

±10

±5

µA

ICC

VI = VCC or 0,

IO = 0

6 V

8

160

80

µA

Ci

DIR or OE

2 V to 6 V

3

10

10

10

pF

(unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

VCC

TA = 25°C

SN54HC640

SN74HC640

UNIT

PARAMETER

(INPUT)

(OUTPUT)

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

2 V

29

105

160

130

tpd

A or B

B or A

4.5 V

10

21

32

26

ns

6 V

8

18

27

22

2 V

109

230

340

290

ten

OE

A or B

4.5 V

27

46

68

58

ns

6 V

20

39

58

49

2 V

40

150

225

190

tdis

OE

A or B

4.5 V

18

30

45

38

ns

6 V

16

26

38

32

2 V

20

60

90

75

tt

A or B

4.5 V

8

12

18

15

ns

6 V

6

10

15

13