DM74LS90 datasheet(5/10 Pages) NSC

5 / 10 page

’LS93 Electrical Characteristics

over recommended operating free air temperature range (unless otherwise noted) (Continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

(Note 1)

IIL

Low Level Input

VCC e Max VI e 04V

Reset

Current

IOS

Short Circuit

VCC e Max (Note 2)

100

Output Current

ICC

Supply Current

VCC e Max (Note 3)

Note 1

All typicals are at VCC e 5V TA e 25 C

Note 2

Not more than one output should be shorted at a time and the duration should not exceed one second

Note 3

ICC is measured with all outputs open both RO inputs grounded following momentary connection to 45V and all other inputs grounded

Note 4

QA outputs are tested at IOL e max plus the limit value of IIL for the B input This permits driving the B input while maintaining full fan-out capability

’LS93 Switching Characteristics

at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)

From (Input)

RL e 2kX

Symbol

Parameter

To (Output)

CL e 15 pF

CL e 50 pF

Units

Min

Max

Min

Max

fMAX

Maximum Clock

A to QA

MHz

Frequency

BtoQB

tPLH

Propagation Delay Time

AtoQA

Low to High Level Output

tPHL

Propagation Delay Time

AtoQA

High to Low Level Output

tPLH

Propagation Delay Time

AtoQD

Low to High Level Output

tPHL

Propagation Delay Time

AtoQD

High to Low Level Output

tPLH

Propagation Delay Time

BtoQB

Low to High Level Output

tPHL

Propagation Delay Time

BtoQB

High to Low Level Output

tPLH

Propagation Delay Time

BtoQC

Low to High Level Output

tPHL

Propagation Delay Time

BtoQC

High to Low Level Output

tPLH

Propagation Delay Time

BtoQD

Low to High Level Output

tPHL

Propagation Delay Time

BtoQD

High to Low Level Output

tPHL

Propagation Delay Time

SET-0 to

High to Low Level Output

Any Q

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