MAX3089ECPD+

Overview

The MAX3089ECPD+ is a ±15kV ESD-protected, fail-safe, high-speed RS-485/RS-422 transceiver in a 14-pin Plastic DIP package. It operates from a single +5V supply (4.75V to 5.25V) and features one driver and one receiver. The device supports selectable data rates of 115kbps, 500kbps, and 10Mbps via the SRL pin. It allows configurable half-duplex or full-duplex operation through the H/F pin and includes independent phase control for transmitter (TXP) and receiver (RXP). Typical quiescent current is 375µA, with shutdown current at 1nA.

Feature Summary

• Pin-compatible with industry-standard 75180 devices while adding programmable functionality
• Configurable half-duplex and full-duplex communication modes via hardware selection
• Independent phase inversion controls for correcting twisted-pair cable reversals
• Enhanced noise immunity with fail-safe circuitry ensuring logic-high output on open inputs

Applications

• RS-422 and RS-485 serial communication networks
• Industrial-control local area networks
• Level translation applications requiring robust ESD protection
• Transceivers designed for environments sensitive to electromagnetic interference

Procurement Notes

Verify the specific suffix 'CPD+' corresponds to the 0°C to +70°C temperature range and 14-pin Plastic DIP package configuration. Confirm that the ordering information matches the manufacturer's latest datasheet revision to ensure compatibility with required slew-rate and duplex settings.

Selection Notes

Select this component when design requirements demand a single IC capable of switching between half-duplex and full-duplex modes without changing part numbers. It is suitable for systems needing adjustable transmission speeds to balance between EMI reduction and high-speed data throughput.

Part Context

This device belongs to the MAX3080E–MAX3089E family of high-speed transceivers. While other members of the series have fixed data rates or duplex modes, the MAX3089E provides unique flexibility by allowing users to program these parameters via external pins, bridging the gap between specialized fixed-function parts.

Replacement Considerations

The MAX3089E is pin-compatible with the standard 75180 transceiver. Designers replacing a 75180 should account for the additional programming pins (SRL, H/F, TXP, RXP) which must be properly terminated or driven to achieve desired performance characteristics.

FAQ

How is the data rate selected on the MAX3089E?

The data rate is determined by the state of the SRL pin: leave it unconnected for 115kbps, connect to VCC for 500kbps, or connect to GND for 10Mbps.

Can the MAX3089E operate in both half-duplex and full-duplex modes?

Yes, the mode is selected via the H/F pin; connecting it to GND enables full-duplex, while driving it high enables half-duplex.

What is the purpose of the TXP and RXP pins?

These pins allow independent phase inversion for the transmitter and receiver outputs, which corrects signal polarity if twisted-pair cables are connected backward.