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LTC1334

Single 5V RS232/RS485 Multiprotocol Transceiver

Linear Technology 

LTC1334

U

W

SWITCHI G WAVEFOR S

3V

DE

0V

5V

Y, Z

VOL

VOH

Z, Y

0V

VOD2

B–A

–VOD2

VOH

R

VOL

3V

D

0V

VO

Y, Z

–VO

VIH

A, B

VIL

VOH

R

VOL

1.5V

f = 1MHz: tr ≤ 10ns: tf ≤ 10ns

1.5V

tZL

tLZ

2.3V

OUTPUT NORMALLY LOW

0.5V

tZH

tHZ

OUTPUT NORMALLY HIGH

0.5V

2.3V

Figure 7. RS485 Driver Enable and Disable Times

LTC1334 • F07

0V f = 1MHz: tr ≤ 10ns: tf ≤ 10ns INPUT

0V

tPLH

1.5V

OUTPUT

tPHL

1.5V

Figure 8. RS485 Receiver Propagation Delays

LTC1334 • F08

1.5V

tPHL

0V

1.5V

tPLH

0V

Figure 9. RS232 Driver Propagation Delays

LTC1334 • F09

1.3V

tPHL

0.8V

1.7V

tPLH

2.4V

LTC1334 • F10

Figure 10. RS232 Receiver Propagation Delays

10

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