MILITARYANDCOMMERCIALTEMPERATURERANGES

IDT54/74FCT821/A/B

HIGHPERFORMANCECMOSBUSINTERFACEREGISTER

3

NOTE:

1. H = HIGH Voltage Level

L = LOW Voltage Level

X = Don’t Care

Z = High Impedance

NC = No Change

↑ = LOW-to-HIGH transition

Inputs

Outputs

OE

Dx

CP

Yx

Function

HL

↑

Z

High Z

HH

↑

Z

H

X

X

Z

Clear

LX

X

L

H

X

X

Z

Hold

LX

X

N C

HL

↑

Z

Load

HH

↑

Z

LL

↑

L

LH

↑

H

NOTES:

1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.

3. Not more than one output should be tested at one time. Duration of the test should not exceed one second.

4. This parameter is guaranteed, but not tested.

Symbol

Parameter

Min.

Max.

Unit

Input HIGH Level

Guaranteed Logic HIGH Level

2

—

—

V

Input LOW Level

Guaranteed Logic LOW Level

—

—

0.8

V

Input HIGH Current

——

5

µA

—

—

Input LOW Current

—

—

µA

—

—

–5

Off State (High Impedance)

——

10

Output Current

—

—

µA

—

—

—

—

–10

Clamp Diode Voltage

—

–0.7

–1.2

V

Short Circuit Current

–75

–120

—

mA

Output HIGH Voltage

—

—V

2.4

4.3

—

2.4

4.3

—

OutputLOWVoltage

—

GND

—

GND

V

—

0.3

0.5

—

0.3

0.5

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

FollowingConditionsApplyUnlessOtherwiseSpecified: