74LS145 datasheet(4/8 Pages) ONSEMI

4 / 8 page

SN74LS145

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

VIK

Input Clamp Diode Voltage

– 0.65

– 1.5

VCC = MIN, IIN = – 18 mA

IOH

Output HIGH Current

250

µA

VCC = MIN, VOH = MAX

0.25

0.4

IOL = 12 mA

VCC = VCC MIN,

VOL

Output LOW Voltage

0.35

0.5

IOL = 24 mA

VCC = VCC MIN,

VIN = VIL or VIH

Th T bl

2.3

3.0

IOL = 80 mA

per Truth Table

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

– 0.4

VCC = MAX, VIN = 0.4 V

ICC

Power Supply Current

VCC = MAX, VIN = GND

AC CHARACTERISTICS (TA = 25°C)

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

tPHL

tPLH

Propagation Delay

Pn Input to Qn Output

VCC = 5.0 V

CL = 45 pF

AC WAVEFORMS

Figure 1.

Figure 2.

VIN

VOUT

1.3 V

tPHL

1.3 V

tPLH

1.3 V

VIN

VOUT

1.3 V

tPHL

1.3 V

tPLH

1.3 V

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