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)

0 OR VCC DI D

A

S1

B

DE

GENERATOR

50I

VCC

RL = 110I

OUT

DE

tDZL, tDZL(SHDN)

VCC

OUT

1.5V

VOL

Figure 5. Driver Enable and Disable Times (tDLZ, tDZL)­­

1.5V

tDLZ

VCC

0

0.25V

ATE

VID

A

R

RECEIVER

OUTPUT

B

Figure 6. Receiver Propagation Delay Test Circuit

A

f = 1MHz, tLH P 3ns, tHL P 3ns

1V

B

VOH

RO

VOL

-1V

tRPHL

tRPLH

VCC

VCC

2

2

tRSKEW = tRPHL - tRPLH

Figure 7. Receiver Propagation Delays

6   _______________________________________________________________________________________

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