Date: 03-04-05

Programmable Dual RS-232/RS-485 Transceiver

© Copyright 2005 Sipex Corporation

4

Figure 2. Driver/Receiver Timing Test Circuit

Figure 3. Driver Timing Test Load #2 Circuit

Figure 1. Driver DC Test Load Circuit

15pF

RO

A

B

A

B

DI

A

B

R

R

500Ω

Output

Under

Test

TEST CIRCUITS

RECEIVER INPUT GRAPH

+1.0mA

–0.6mA

+12V

+6V

–3V

–7V

1 Unit Load

Maximum Input Current

versus Voltage

RS-485 RECEIVER