SP3221E Ver la hoja de datos (PDF) - Exar Corporation

Número de pieza

componentes Descripción

Fabricante

SP3221E

Intelligent +3.0V to +5.5V RS-232 Transceiver

Exar Corporation 

PIN DESCRIPTION

Name

EN

C1+

V+

C1-

C2+

C2-

V-

R1IN

R1OUT

STATUS

T1IN

ONLINE

T1OUT

GND

Vcc

SHUTDOWN

Function

Receiver Enable, apply logic LOW for normal operation. Apply logic HIGH to

disable receiver output (high-Z state).

Positive terminal of the voltage doubler charge-pump capacitor

Regulated +5.5V output generated by charge pump

Negative terminal of the voltage doubler charge-pump capacitor

Positive terminal of the inverting charge-pump capacitor

Negative terminal of the inverting charge-pump capacitor

Regulated -5.5V output generated by charge pump

RS-232 receiver input

TTL/CMOS receiver output

TTL/CMOS output indicating receiver signal activity

TTL/CMOS driver input

Apply logic HIGH to override AUTO ON-LINE ® circuitry keeping driver active

(SHUTDOWN must also be logic HIGH, refer to table 2)

RS-232 driver output

Ground

+3.0V to +5.5V supply voltage

Apply logic LOW to shut down drivers and charge pump. This overrides all

AUTO ON-LINE ® circuitry and ONLINE (refer to table 2).

Pin #

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

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

7

SP3221E_200_081816

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