SN74LS259 Просмотр технического описания (PDF) - ON Semiconductor

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Компоненты Описание

производитель

SN74LS259

8-Bit Addressable Latch

ON Semiconductor 

SN74LS259

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits

Symbol

VIH

Parameter

Input HIGH Voltage

Min Typ Max Unit

Test Conditions

Guaranteed Input HIGH Voltage for

2.0

V

All Inputs

VIL

Input LOW Voltage

0.8

V

Guaranteed Input LOW Voltage for

All Inputs

VIK

Input Clamp Diode Voltage

–0.65 –1.5

V

VOH

Output HIGH Voltage

2.7

3.5

V

VOL

Output LOW Voltage

0.25 0.4

V

0.35 0.5

V

IIH

Input HIGH Current

20

µA

0.1

mA

IIL

Input LOW Current

–0.4 mA

IOS

Short Circuit Current (Note 2)

–20

–100 mA

ICC

Power Supply Current

36

mA

2. Not more than one output should be shorted at a time, nor for more than 1 second.

VCC = MIN, IIN = –18 mA

VCC = MIN, IOH = MAX, VIN = VIH

or VIL per Truth Table

IOL = 4.0 mA

IOL = 8.0 mA

VCC = VCC MIN,

VIN = VIL or VIH

per Truth Table

VCC = MAX, VIN = 2.7 V

VCC = MAX, VIN = 7.0 V

VCC = MAX, VIN = 0.4 V

VCC = MAX

VCC = MAX

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

Limits

Symbol

Parameter

Min Typ Max Unit

tPLH

tPHL

Turn-Off Delay, Enable to Output

Turn-On Delay, Enable to Output

22

35

ns

15

24

ns

tPLH

tPHL

Turn-Off Delay, Data to Output

Turn-On Delay, Data to Output

20

32

ns

13

21

ns

tPLH

tPHL

Turn-Off Delay, Address to Output

Turn-On Delay, Address to Output

24

38

ns

18

29

ns

tPHL

Turn-On Delay, Clear to Output

17

27

ns

Test Conditions

CL = 15 pF

AC SET-UP REQUIREMENTS (TA = 25°C, VCC = 5.0 V)

Symbol

ts

tW

th

th

Input Setup Time

Parameter

Pulse Width, Clear or Enable

Hold Time, Data

Hold Time, Address

Limits

Min

Typ

Max

Unit

20

ns

15

ns

5.0

ns

20

ns

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