SN74LS640DW Просмотр технического описания (PDF) - ON Semiconductor

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Компоненты Описание

производитель

SN74LS640DW

Octal Bus Transceivers

ON Semiconductor 

SN74LS640, SN74LS641, SN74LS642, SN74LS645

SN74LS641 • SN74LS642

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits

Symbol

VIH

Parameter

Input HIGH Voltage

Min Typ Max Unit

Test Conditions

2.0

V

Guaranteed Input HIGH Voltage for

All Inputs

VIL

Input LOW Voltage

0.6

V

Guaranteed Input LOW Voltage for

All Inputs

VIK

Input Clamp Diode Voltage

IOH

Output HIGH Current

VOL

Output LOW Voltage

IIH

Input HIGH Current

IIL

Input LOW Current

Power Supply Current

Total, Output HIGH

ICC

Total, Output LOW

−0.65 −1.5

V

VCC = MIN, IIN = − 18 mA

100

μA

VCC = MIN, VOH = MAX

0.25 0.4

0.35 0.5

V

IOL = 12 mA

V

IOL = 24 mA

VCC = VCC MIN,

VIN = VIL or VIH

per Truth Table

20

μA

VCC = MAX, VIN = 2.7 V

−0.1 mA VCC = MAX, VIN = 7.0 V

− 0.4 mA VCC = MAX, VIN = 0.4 V

70

90

mA VCC = MAX

Total at HIGH Z

95

AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)

Limits

LS641

LS642

Symbol

Parameter

Min Typ Max Min Typ Max Unit

tPLH

Propagation Delay,

tPHL

A to B

17 25

16 25

19

14

25

25

ns

tPLH

Propagation Delay,

tPHL

B to A

17 25

16 25

19

14

25

25

ns

tPLH

Propagation Delay,

tPHL

G, DIR to A

23 40

34 50

26

43

40

60

ns

tPLH

Propagation Delay,

tPHL

G, DIR to B

25 40

37 50

28

39

40

60

ns

Test Conditions

CL = 45 pF,

RL = 667 Ω

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