MAX1489EESD

Drivers, Receivers, Transceivers Overview

The MAX1489EESD is a quad, low-power line receiver designed for EIA/TIA-232, EIA/TIA-562, and CCITT V.28 communications in harsh environments. It features ±15kV electrostatic discharge (ESD) protection on each input with a ±25V input voltage range. The device includes input hysteresis and time-domain filtering to eliminate external filtering requirements. Outputs are TTL and CMOS compatible, supporting a guaranteed data rate of 120kbps. Typical supply current is 350µA. It operates from a single +5V power supply within the -40°C to +85°C temperature range and is housed in a 14-pin SO package.

Drivers, Receivers, Transceivers Feature Summary

• Enhanced ESD protection withstands ±15kV Human Body Model and ±8kV IEC1000-4-2 contact discharge without latchup.
• Integrated input hysteresis and time-domain filtering provide stable thresholds and noise immunity without external components.
• Low power consumption with typical supply current of 350µA suitable for battery-operated systems.
• Pin-compatible with legacy MC1489, SN75189, and DS1489 devices for easy upgrades.

Drivers, Receivers, Transceivers Applications

• PC Motherboards
• Modems
• Interfacing Data Terminal Equipment (DTE) with Data Circuit-Terminating Equipment (DCE)
• Equipment requiring IEC1000-4-2 Level 4 ESD protection

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'ESD' corresponds to the 14-pin Small Outline package and industrial temperature range (-40°C to +85°C). Confirm RoHS compliance status through official manufacturer documentation or authorized distributors before procurement. Ensure ordering quantities match standard factory packaging configurations.

Drivers, Receivers, Transceivers Selection Notes

Select this component when designing RS-232 interfaces requiring robust ESD immunity in space-constrained applications. It serves as a direct drop-in replacement for older quad receivers like the MC1489 or SN75189. Consider the low supply current for power-sensitive designs and verify that the 120kbps data rate meets system timing requirements.

Drivers, Receivers, Transceivers Part Context

The MAX1489E belongs to Maxim Integrated's family of low-power RS-232 line receivers. This series focuses on providing enhanced reliability in noisy environments through integrated filtering and high ESD tolerance. The device simplifies board layout by removing the need for external RC filters typically required for noise suppression in standard receivers.

Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-compatible replacements include the MC1489, MC14C89, SN75189, SN75C189, DS1489, and DS14C89. Verify that substitute devices meet the same ESD protection levels and operating temperature ranges if used in harsh environments.

Drivers, Receivers, Transceivers FAQ

Does the MAX1489E require external filtering components?

No, the device features built-in input hysteresis and time-domain filtering, which eliminates the need for external filtering components.

What is the maximum ESD protection rating for the inputs?

The inputs are protected against ±15kV electrostatic discharge shocks using the Human Body Model and ±15kV via Air-Gap Discharge per IEC1000-4-2.

Is the MAX1489E latchup-free during ESD events?

Yes, the device is designed to be latchup-free during an ESD event, ensuring continued operation after exposure to static discharges.