6

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

SP3220E_EB_EU_101_060311

Table 1. Device Pin Description

NAME

FUNCTION

PIN NUMBER

EN

Receiver Enable. Apply Logic LOW for normal operation.

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

1

C1+

Positive terminal of the voltage doubler charge-pump capacitor

2

V+

+5.5V output generated by the charge pump

3

C1-

Negative terminal of the voltage doubler charge-pump capacitor

4

C2+

Positive terminal of the inverting charge-pump capacitor

5

C2-

Negative terminal of the inverting charge-pump capacitor

6

V-

-5.5V output generated by the charge pump

7

R

RS-232 receiver input

8

R

TTL/CMOS receiver output

9

T

TTL/CMOS driver input

11

T

RS-232 driver output.

13

GND

Ground

14

V

CC

+3.0V to +5.5V supply voltage

15

SHDN

Shutdown Control Input. Drive HIGH for normal device operation.

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

board power supply

16

N.C.

No Connect

10, 12

PIN FUNCTION