SP3495E 查看數據表（PDF） - Exar Corporation

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SP3495E

HIGH SPEED +3.3V RS-485/RS-422 TRANSCEIVERS WITH +/-15KV ESD PROTECTION AND ADVANCED FAILSAFE

Exar Corporation 

SP3495E-3497E

HIGH SPEED +3.3V RS-485/RS-422 TRANSCEIVERS WITH +/-15KV ESD PROTECTION AND ADVANCED FAILSAFE

REV. 1.0.0

FIGURE 14. RECEIVER ENABLE AND DISABLE TIMES TEST CIRCUIT

1.5V

-1.5V

S3

B

A

R

RE

GENERATOR

50Ω

1kΩ

CL= 15pF

S1

Vcc

S2

FIGURE 15. RECEIVER ENABLE AND DISABLE TIMING DIAGRAM 1

S1 is open, S2 is closed, S3 = 1.5V

3V

RE

1.5V

t t ZH, ZH(SHDN)

VOH

OUT

VOH /2

0V

FIGURE 16. RECEIVER ENABLE AND DISABLE TIMING DIAGRAM 2

S1 is closed, S2 is open, S3 = -1.5V

3V

RE

1.5V

0V

t t ZL, ZL(SHDN)

VCC

OUT

VOL= VCC /2

VOL

12

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