SN74LS221 View Datasheet(PDF) - ON Semiconductor

Part Name

Description

MFG CO.

SN74LS221

Dual Monostable Multivibrators with Schmitt−Trigger Inputs

ON Semiconductor 

SN74LS221

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits

Symbol

VT+

Parameter

Positive-Going Threshold

Voltage at C Input

Min Typ Max Unit

Test Conditions

1.0

2.0

V

VCC = MIN

VT−

Negative-Going Threshold

0.7

0.8

Voltage at C Input

V

VCC = MIN

VT+

Positive-Going Threshold

Voltage at B Input

1.0

2.0

V

VCC = MIN

VT−

Negative-Going Threshold

0.8

0.9

Voltage at B Input

V

VCC = MIN

VIH

Input HIGH Voltage

2.0

V

Guaranteed Input HIGH Voltage for

A Input

VIL

Input LOW Voltage

0.8

V

Guaranteed Input LOW Voltage for

A Input

VIK

Input Clamp Voltage

VOH

Output HIGH Voltage

VOL

Output LOW Voltage

IIH

Input HIGH Current

Input LOW Current

IIL

Input A

Input B

Clear

− 1.5

V

VCC = MIN, IIN = − 18 mA

2.7

3.4

V

VCC = MIN, IOH = MAX

0.35 0.5

V

IOL = 8.0 mA

VCC = MIN

20

μA VCC = MAX, VIN = 2.7 V

0.1

mA VCC = MAX, VIN = 7.0 V

− 0.4

− 0.8

mA

VCC = MAX, VIN = 0.4 V

− 0.8

IOS

Short Circuit Current (Note 1)

− 20

− 100 mA VCC = MAX

Power Supply Current

ICC

Quiescent

Triggered

4.7

11

mA VCC = MAX

19

27

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

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