HD74LS642 データシートの表示（PDF） - Renesas Electronics

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HD74LS642

Octal Bus Transceivers (inverted open-collector outputs)

Renesas Electronics 

HD74LS642

Electrical Characteristics

Item

Input voltage

Hysteresis

Symbol

VIH

VIL

VT+ – VT–

min.

2.0

—

0.2

Output current

IOH

—

Output voltage

—

VOL

—

IIH

—

Input

current

A or B

DIR or G

IIL

—

—

II

—

Supply current**

ICCH

—

ICCL

—

ICCZ

—

Input clamp voltage

VIK

—

Notes: * VCC = 5 V, Ta = 25°C

** ICC is measured with all outputs open.

typ.*

—

—

—

—

—

—

—

—

—

—

48

62

64

—

max.

—

0.8

—

100

0.4

0.5

20

–400

0.1

0.1

70

90

95

–1.5

Unit

V

V

V

µA

V

µA

µA

mA

mA

mA

mA

mA

V

(Ta = –20 to +75 °C)

Condition

VCC = 4.75 V

VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,

VOH = 5.5 V

IOL = 12 mA VCC = 4.75 V,

IOL = 24 mA VIH = 2 V, VIL = 0.8 V

VCC = 5.25 V, VI = 2.7 V

VCC = 5.25 V, VI = 0.4 V

VI = 5.5 V

VI = 7 V

VCC = 5.25 V

VCC = 5.25 V

VCC = 4.75 V, IIN = –18 mA

Switching Characteristics

Item

Propagation delay time

Output enable time

(VCC = 5 V, Ta = 25°C)

Symbol Inputs Outputs min. typ. max. Unit Condition

A

tPLH

B

B

—

19

25

ns

A

—

19

25

ns

A

tPHL

B

G

tPLH

G

B

—

14

25

ns

A

—

14

25

ns CL = 45 pF,

A

—

26

40

ns

RL = 667 Ω

B

—

28

40

ns

G

tPHL

G

A

—

43

60

ns

B

—

39

60

ns

Rev.2.00, Feb.18.2005, page 3 of 6

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