MAX14840E Просмотр технического описания (PDF) - Maxim Integrated

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MAX14840E

40Mbps, +3.3V, RS-485 Half-Duplex Transceivers

Maxim Integrated 

40Mbps, +3.3V, RS-485 Half-Duplex

Transceivers

Test and Timing Diagrams (continued)

+1.5V

S3

R

S1

-1.5V

1kI

VID R RO

VCC

S2

CL

15pF

RE

GENERATOR

50I

RE

RO

RE

1.5V

tRHZ

RO

0.25V

VCC

1.5V

tRZH, tRZH(SHDN) 0

S1 OPEN

S2 CLOSED

S3 = +1.5V

VOH

VCC

2

0

VCC S1 OPEN

S2 CLOSED

S3 = +1.5V

0

VOH

0

Figure 8. Receiver Enable and Disable Times

RE

tRZL, tRZL(SHDN)

RO

1.5V

RE

tRLZ

RO

0.25V

VCC

S1 CLOSED

1.5V

S2 OPEN

0 S3 = -1.5V

VCC

VCC

2

VOL

VCC S1 CLOSED

S2 OPEN

S3 = -1.5V

0

VCC

VOL

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