SN74LS240 datasheet(3/8 Pages) ONSEMI

3 / 8 page

SN74LS240, SN74LS244

http://onsemi.com

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

VIH

Input HIGH Voltage

2.0

Guaranteed Input HIGH Voltage for

All Inputs

VIL

Input LOW Voltage

0.8

Guaranteed Input LOW Voltage for

All Inputs

VT+–VT–

Hysteresis

0.2

0.4

VCC = MIN

VIK

Input Clamp Diode Voltage

–0.65

–1.5

VCC = MIN, IIN = –18 mA

Output HIGH Voltage

2.4

3.4

VCC = MIN, IOH = –3.0 mA

VOH

Output HIGH Voltage

2.0

VCC = MIN, IOH = MAX

Output LOW Voltage

0.25

0.4

IOL = 12 mA

VCC = VCC MIN,

or V

VOL

Output LOW Voltage

0.35

0.5

IOL = 24 mA

VIN = VIL or VIH

per Truth Table

IOZH

Output Off Current HIGH

µA

VCC = MAX, VOUT = 2.7 V

IOZL

Output Off Current LOW

–20

µA

VCC = MAX, VOUT = 0.4 V

Input HIGH Current

µA

VCC = MAX, VIN = 2.7 V

IIH

Input HIGH Current

0.1

VCC = MAX, VIN = 7.0 V

IIL

Input LOW Current

–0.2

VCC = MAX, VIN = 0.4 V

IOS

Output Short Circuit Current (Note 1.)

–40

–225

VCC = MAX

Power Supply Current

Total, Output HIGH

Total, Output LOW

LS240

ICC

LS244

VCC = MAX

Total at HIGH Z

LS240

LS244

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

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

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

tPLH

tPHL

Propagation Delay, Data to Output

LS240

9.0

tPLH

tPHL

Propagation Delay, Data to Output

LS244

CL = 45 pF,

RL = 667 Ω

tPZH

Output Enable Time to HIGH Level

RL = 667 Ω

tPZL

Output Enable Time to LOW Level

tPLZ

Output Disable Time from LOW Level

CL = 5.0 pF,

tPHZ

Output Disable Time from HIGH Level

CL = 5.0 F,

RL = 667 Ω

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