Application Note 1593

3

Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is

cautioned to verify that the Application Note or Technical Brief is current before proceeding.

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AN1593.0

February 1, 2011

Intersil Full-Failsafe Transceiver

Families

Intersil offers a wide range of full-failsafe RS-485/RS-422

transceiver families, and receiver only ICs, as shown in Table 1.

Most of the transceiver families include half and full duplex

configurations, and a variety of data rates including slew rate

limited versions for low data rate applications.

Conclusion

A Loss-of-Signal (LOS) indicator may be useful for

communication systems, but a standard RS-485 transceiver is ill

suited to detect the LOS condition. If the RS-485 network utilizes

transceivers with full-failsafe receivers, then additional circuitry

can be added to implement the LOS detector.

TABLE 1. INTERSIL RS-422/RS-485 FULL-FAILSAFE RECEIVER FAMILIES

PART NUMBER

TYPE

(V)

ESD LEVEL

ISL83080E-88E

Transceivers

5

15kV HBM

ISL83070E-78E

Transceivers

3.3

15kV HBM

ISL3150E-59E

Transceivers

5

15kV IEC

ISL3170E-79E

Transceivers

3.3

15kV IEC

ISL32470E-78E

ISL32490E-98E

±60V Fault Protected

Transceivers

5

16.5kV HBM

ISL3280E-84E

Receiver Only

3.3, 5

16.5kV IEC

ISL32173E-77E

ISL32273E-77E

Quad Receivers

3.3, 5

16.5kV IEC