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

SP3070E-SP3078E_100_061109

PIN DESCRIPTION

FULL DUPLEX

DEVICES

HALF

DUPLEX

DEVICES

PIN

NAME

PIN FUNCTION

SP3070E SP3071E

SP3072E

SP3073E SP3074E

SP3075E

SP3076E SP3077E

SP3078E

PIN NUMBER

2

2

1

RO

Receiver Output. When RE is low and if (A – B) ≥

-50mV, RO is High. If (A – B) ≤ - 200mV, RO is low.

3

-

2

RE

Receiver Output Enable. When RE is low, RO is enabled.

When RE is high, RO is high impedance. RE should be

high and DE low to enter shutdown mode. RE is a hot-

swap input.

4

-

3

DE

Driver Output Enable. When DE is high, outputs are

enabled. When DE is low, outputs are high impedance. DE

should be low and RE high to enter shutdown mode. DE is

a hot-swap input.

5

3

4

DI

Driver Input. With DE high, a low level on DI forces

noninverting output low and inverting output high. Similarly,

a high level on DI forces noninverting output high and

inverting output low.

6, 7

4

5

GND Ground

9

5

-

Y

Noninverting Driver Output

10

6

-

Z

Inverting Driver Output

11

7

-

B

Inverting Receiver Input

-

-

7

B

Inverting Receiver Input and Inverting Driver Output

12

8

-

A

Noninverting Receiver Input

-

-

6

A

Noninverting Receiver Input and Noninverting Driver

Output

14

1

8

V

CC

Positive Supply V

capacitor.

1, 8, 13

-

-

NC

No Connect