SP3238E 데이터 시트보기 (PDF) - Exar Corporation

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SP3238E

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

Exar Corporation 

RECEIVER +2.7V

RS-232 INPUT 0V

VOLTAGES -2.7V

STATUS

VCC

0V

+5V

DRIVER

RS-232 OUTPUT 0V

VOLTAGES

-5V

Figure 16. AUTO ON-LINE® Timing Waveforms

tSTSL

S

H

U

T

D

O

W

N

tSTSH

tONLINE

Inactive Detection Block

RXINACT

RXIN

RS-232

Receiver Block

RXOUT

Figure 17. Stage I of AUTO ON-LINE® Circuitry

Delay

Stage

Delay

Stage

Delay

Stage

Delay

Stage

Delay

Stage

R1INACT

R2INACT

R3INACT

R4INACT

SHUTDOWN

R5INACT

Figure 18. Stage II of AUTO ON-LINE® Circuitry

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

13

STATUS

SP3238E_100_020111

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