SP3221E 데이터 시트보기 (PDF) - Signal Processing Technologies

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SP3221E

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

Signal Processing Technologies 

NAME

EN

C1+

V+

C1-

C2+

FUNCTION

Receiver Enable. Apply logic HIGH for normal operation.

Apply logic LOW to disable the receiver outputs (high-Z

state).

Positive terminal of the voltage doubler charge-pump

capacitor.

Regulated +5.5V output generated by the charge pump.

Negative terminal of the voltage doubler charge-pump

capacitor.

Positive terminal of the inverting charge-pump capacitor.

PIN NO.

1

2

3

4

5

C2-

Negative terminal of the inverting charge-pump capacitor.

6

V-

Regulated -5.5V output generated by the charge pump.

7

R1IN

RS-232 receiver input.

8

R1OUT TTL/CMOS receiver output.

9

STATUS

TTL/CMOS Output indicating ONLINE and SHUTDOWN

status.

10

T1IN

TTL/CMOS driver input.

11

Apply logic HIGH to override Auto-Online circuitry keeping

ONLINE drivers active (SHUTDOWN must also be logic HIGH, refer

12

to Table 2).

T1OUT RS-232 driver output.

13

GND

Ground.

14

VCC

+3.0V to +5.5V supply voltage.

15

Apply logic LOW to shut down drivers and charge pump.

SHUTDOWN This overrides all Auto-Online circuitry and ONLINE (refer to

16

Table 2).

Table 1. Device Pin Description

Date: 7/21/04

SP3221E +3.0V to +5.5V RS-232 Transceiver

5

© Copyright 2004 Sipex Corporation

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