Table 1. Device Pin Description

NAME

FUNCTION

PIN NUMBER

SP3222EB

SP3232EB

SOIC

SSOP

TSSOP

SSOP

TSSOP

NSOIC

WSOIC

QFN

EN

Receiver Enable. Apply Logic LOW for normal operation.

Apply logic HIGH to disable the receiver outputs (high-Z state)

1

1

-

-

C1+

Positive terminal of the voltage doubler charge-pump capacitor

2

2

1

15

V+

+5.5V output generated by the charge pump

3

3

2

16

C1-

Negative terminal of the voltage doubler charge-pump capacitor

4

4

3

1

C2+

Positive terminal of the inverting charge-pump capacitor

5

5

4

2

C2-

Negative terminal of the inverting charge-pump capacitor

6

6

5

3

V-

-5.5V output generated by the charge pump

7

7

6

4

T

RS-232 driver output.

15

17

14

12

T

RS-232 driver output.

8

8

7

5

R

RS-232 receiver input

14

16

13

11

R

RS-232 receiver input

9

9

8

6

R

TTL/CMOS receiver output

13

15

12

10

R

TTL/CMOS receiver output

10

10

9

7

T

TTL/CMOS driver input

12

13

11

9

T

TTL/CMOS driver input

11

12

10

8

GND

Ground.

16

18

15

13

V

CC

+3.0V to +5.5V supply voltage

17

19

16

14

SHDN

Shutdown Control Input. Drive HIGH for normal device opera-

tion. Drive LOW to shutdown the drivers (high-Z output) and

the on-board power supply

18

20

-

-

N.C.

No Connect

-

11, 14

-

-

PIN FUNCTION

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7000• www.exar.com

SP3222EB/SP3232EB_106_022316

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