SN74LS148DR2 データシートの表示（PDF） - ON Semiconductor

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SN74LS148DR2

10-Line to 4-Line AND 8-Line to 3-Line Priority Encodeers

ON Semiconductor 

SN74LS147 SN74LS148

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

V

All Inputs

VIL

Input LOW Voltage

0.8

V

Guaranteed Input LOW Voltage for

All Inputs

VIK

Input Clamp Diode Voltage

VOH

Output HIGH Voltage

VOL

Output LOW Voltage

– 0.65 – 1.5

V

VCC = MIN, IIN = – 18 mA

2.7

3.5

V

VCC = MIN, IOH = MAX, VIN = VIH

or VIL per Truth Table

0.25 0.4

0.35 0.5

V

IOL = 4.0 mA

V

IOL = 8.0 mA

VCC = VCC MIN,

VIN = VIL or VIH

per Truth Table

Input HIGH Current

All Others

IIH

Inputs 1 – 7 (LS148)

All Others

Inputs 1 – 7 (LS148)

20

µA VCC = MAX, VIN = 2.7 V

40

0.1

0.2

mA VCC = MAX, VIN = 7.0 V

Input LOW Current

IIL

All Others

Inputs 1 – 7 (LS148)

– 0.4 mA VCC = MAX, VIN = 0.4 V

– 0.8

IOS

Short Circuit Current (Note 1)

– 20

– 100 mA VCC = MAX

ICCH

Power Supply Current Output HIGH

17

mA VCC = MAX, All Inputs = 4.5 V

ICCL

Output LOW

20

mA

VCC = MAX, Inputs 7 & E1 = GND

All Other Inputs = 4.5 V

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

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