SP334CT Просмотр технического описания (PDF) - Signal Processing Technologies

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SP334CT

Programmable RS-232/RS-485 Transceiver

Signal Processing Technologies 

SWITCHING WAVEFORMS

+3V

DRIVER INPUT

0V

B

DRIVER

OUTPUT A

DIFFERENTIAL VO+

OUTPUT 0V

VA – VB VO–

tSKEW = |tDPLH - tDPHL|

f ≥ 1MHz; tR ≤ 10ns; tF ≤ 10ns

1.5V

1.5V

tPLH

tPHL

VO 1/2VO

tDPLH

tDPHL

tR

Figure 5. Driver Propagation Delays

1/2VO

tF

+3V

TxEN 0V

5V

A, B

VOL

VOH

A, B

0V

f = 1MHz; tR ≤ 10ns; tF ≤ 10ns

1.5V

tZL

2.3V Output normally LOW

2.3V

tZH

Output normally HIGH

1.5V

tLZ

0.5V

0.5V

tHZ

Figure 6. Driver Enable and Disable Times

V0D2+

A–B

V0D2–

VOH

RECEIVER OUT

VOL

tPHL

f = 1MHz; tR ≤ 10ns; tF ≤ 10ns

0V

INPUT

1.5V

OUTPUT

tPLH

0V

1.5V

Figure 7. Receiver Propagation Delays

SP334DS/10

Programmable RS-232/RS-485 Transceiver

5

© Copyright 2000 Sipex Corporation

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