SN74BCT25642

25 Ω OCTAL BUS TRANSCEIVER

SCBS047C − DECEMBER 1989 − REVISED NOVEMBER 1993

2−3

POST OFFICE BOX 655303

POST OFFICE BOX 1443

recommended operating conditions (see Note 2)

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

VOH

High-level output voltage

A port

5.5

V

IIK

Input clamp current

−18

mA

IOH

High-level output current

B port

−3

mA

IOL

Low-level output current

A port

188

mA

IOL

Low-level output current

B port

24

mA

TA

Operating free-air temperature

0

70

°C

NOTE 2: Unused or floating pins (input or I/O) must be held high or low.

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

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = − 18 mA

−1.2

V

VOH

Any B

VCC = 4.75 V,

IOH = − 1 mA

2.7

V

VOH

Any B

VCC = 4.5 V,

IOH = − 3 mA

2.4

3.3

V

Any A

VCC = 4.5 V

IOL = 94 mA

0.42

0.55

VOL

Any A

VCC = 4.5 V

IOL = 188 mA

0.7

V

VOL

Any B

VCC = 4.5 V,

IOL = 24 mA

0.35

0.5

V

IOH

Any A

VCC = 4.5 V,

VOH = 5.5 V

0.1

mA

II

A and B

VCC = 5.5 V,

VI = 5.5 V

0.25

mA

II

DIR and OE

VCC = 5.5 V,

VI = 5.5 V

0.1

mA

IIH‡

A and B

VCC = 5.5 V,

VI = 2.7 V

70

A

IIH‡

DIR and OE

VCC = 5.5 V,

VI = 2.7 V

20

µA

IIL‡

A and B

VCC = 5.5 V,

VI = 0.5 V

− 0.6

mA

IIL‡

DIR and OE

VCC = 5.5 V,

VI = 0.5 V

− 0.6

mA

IOS§

Any B

VCC = 5.5 V,

VO = 0

−60

−150

mA

ICCL

A to B

VCC = 5.5 V

40

64

mA

ICCL

B to A

VCC = 5.5 V

78

125

mA

ICCH

A to B

VCC = 5.5 V

25

40

mA

ICCH

B to A

VCC = 5.5 V

34

55

mA

ICCZ

A to B

VCC = 5.5 V

7.6

13

mA

Ci

Control inputs

VCC = 5 V,

VO = 2.5 V or 0.5 V

8

pF

Cio

A port

VCC = 5 V,

VI = 2.5 V or 0.5 V

15

pF

Cio

B port

VCC = 5 V,

VI = 2.5 V or 0.5 V

8

pF

† All typical values are at VCC = 5 V, TA = 25°C.

‡ For I/O ports, the parameters IIH and IIL include the off-state output current.

§ Not more than one output should be shorted at a time, and the duration of the short-circuit should not exceed 10 ms.