Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com

SP3203E_00_2080

6

PIN DESCRIPTION

Name

Function

Pin #

C+

Positive terminal of the voltage doubler charge-pump capacitor



V+

Regulated +5.5V output generated by charge pump

2

C-

Negative terminal of the voltage doubler charge-pump capacitor

3

C2+

Positive terminal of the inverting charge-pump capacitor

4

C2-

Negative terminal of the inverting charge-pump capacitor

5

V-

Regulated -5.5V output generated by charge pump

6

T

TTL/CMOS driver input

7

T

TTL/CMOS driver input

8

T

TTL/CMOS driver input

9

R

TTL/CMOS receiver output

0

R

TTL/CMOS receiver output



V

L

Logic-Level Supply Voltage Selection

2

R

RS-232 receiver input

3

R

RS-232 receiver input

4

T

RS-232 Driver output

5

T

RS-232 Driver output

6

T

RS-232 Driver output

7

GND

Ground

8

Vcc

+3.0V to +5.5V supply voltage

9

SHUTDOWN

Apply logic LOW to shut down drivers and charge pump.

20