Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP3070E-SP3078E_100_061109

16

Second, a thermal-shutdown circuit, forces

the driver outputs into a high-impedance

state if the die temperature becomes ex-

cessive.

lINE lENGTH

The RS-485/RS422 standard covers line

lengths up to 4000ft.

TyPICal aPPlICaTIONS

The SP3072E, SP3075E and SP3078E

transceivers are designed for bidirectional

data communications on multipoint bus

transmission lines.

DETaIlED DESCRIPTION

To minimize reflections, terminate the line at

both ends in its characteristic impedance,

and keep stub lengths off the main line as

short as possible. The slew-rate-limited

SP3070E - SP3075E are more tolerant of

imperfect termination.

PaRTS SElECTOR GuIDE

PART

NUMBER

Half/Full

Duplex

Datarate

Mbps

Shut-

down

Receiver

Driver Enable

Trans.

On Bus

Pin

Count

Industry Standard

Pinout

Pin

Compatible

Upgrade from:

SP3070E

Full

0.25

Yes

Yes

256

14

MAX3070E, 75180

SP3071E

Full

0.25

No

No

256

8

MAX 3071E, 75179

SP3493

SP3072E

Half

0.25

Yes

Yes

256

8

MAX 3072E, 75176

SP3483

SP3073E

Full

0.5

Yes

Yes

256

14

MAX 3073E, 75180

SP3074E

Full

0.5

No

No

256

8

MAX 3074E, 75179

SP3075E

Half

0.5

Yes

Yes

256

8

MAX 3075E, 75176

SP3494

SP3076E

Full

16

Yes

Yes

256

14

MAX 3076E, 75180

SP3491

SP3077E

Full

16

No

No

256

8

MAX3077E, 75179

SP3490

SP3078E

Half

16

Yes

Yes

256

8

MAX 3078E, 75176

SP3485,

SP3481