19

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

SP3080E-SP3088E_100_062309

FUNCTION TABLES

Receiving

Inputs

Output

RE

DE

V

RO

0

X

≥ -40mV

1

0

X

≤-200mV

0

0

X

Open/shorted

1

1

1

X

High-Z

1

0

X

Shutdown

Transmitting

Inputs

Outputs

RE

DE

DI

Y

Z

X

1

1

1

0

X

1

0

0

1

0

0

X

High-Z

1

0

X

Shutdown

SP3080E, SP3083E, SP3086E (Full Duplex)

SP3081E SP3084E, SP3087E (Full Duplex)

Transmitting

Input

Outputs

DI

Y

Z

1

1

0

0

0

1

Open

1

0

Receiving

Inputs

Output

V

RO

≥ -40mV

1

≤-200mV

0

Open/shorted

1

SP3082E SP3085E, SP3088E (Half Duplex)

Transmitting

Inputs

Outputs

RE

DE

DI

A

B

X

1

1

1

0

X

1

0

0

1

0

0

X

High-Z

1

0

X

Shutdown

Receiving

Inputs

Output

RE

DE

V

RO

0

X

≥ -40mV

1

0

X

≤-200mV

0

0

X

Open/shorted

1

1

1

X

High-Z

1

0

X

Shutdown

Note: Receiver inputs -200mV < VA - VB < -40mV, should be considered indeterminate

PRODUCT SELECTOR GUIDE

Part

Number

Duplex

Data Rate

(Mbps)

Shut-down Receiver &

Driver Enable Trans on Bus Foot-print

pin-compatible

upgrade from:

SP3080E

Full

0.115

Yes

Yes

256

SN75180

MAX3080

SP3081E

Full

0.115

No

No

256

SN75179

MAX3081

SP3082E

Half

0.115

Yes

Yes

256

SN75176

SP483, MAX3082

SP3083E

Full

0.5

Yes

Yes

256

SN75180

MAX3083

SP3084E

Full

0.5

No

No

256

SN75179

MAX3084

SP3085E

Half

0.5

Yes

Yes

256

SN75176

MAX3085

SP3086E

Full

20

Yes

Yes

256

SN75180 SP1491, MAX3086

SP3087E

Full

20

No

No

256

SN75179 SP1490, MAX3087

SP3088E

Half

20

Yes

Yes

256

SN75176 SP1481, MAX3088