MAX3097EEEE+T

Overview

The MAX3097EEEE+T is a triple RS-422/RS-485 receiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3V to +5.5V supply and supports data rates up to 32Mbps. The device features ±15kV ESD protection (Human Body Model, IEC 1000-4-2 Air-Gap) and an extended common-mode range of -10V to +13.2V. It includes fault-detection circuitry with independent outputs for open-circuit, short-circuit, low differential voltage, and common-mode violations. A capacitor-programmable delay prevents erroneous alarms at slow edge rates. It is housed in a 16-pin QSOP package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Triple high-speed RS-422/RS-485 receivers with integrated fault detection
• Independent alarm outputs for open-circuit, short-circuit, low signal, and common-mode faults
• Capacitor-programmable delayed fault output to prevent false alarms during slow transitions
• Robust ±15kV ESD protection on all receiver inputs

Applications

• Motor-shaft encoder interfaces
• High-speed industrial communication systems
• Telecommunications equipment
• Embedded control systems

Procurement Notes

Verify the specific ordering suffix 'EEEE' corresponds to the required -40°C to +85°C temperature range and 16-pin QSOP package configuration. Confirm that the '+T' designation aligns with the intended reel or cut-tape packaging requirements for your assembly process. Cross-reference the manufacturer's current production status to ensure availability.

Selection Notes

Select this component when three independent RS-485 channels are required alongside comprehensive fault monitoring capabilities. It is suitable for applications demanding high ESD immunity and operation across wide common-mode voltage ranges. Ensure the system design accommodates the external capacitor needed for the programmable delay function on the ALARMD pin.

Part Context

This part belongs to the MAX3097E/MAX3098E family of robust interface receivers. These devices were specifically engineered for motor-control feedback loops where signal integrity is critical. The family differentiates between variants based on temperature grades and package types, providing flexibility for various industrial enclosure and environmental constraints.

Replacement Considerations

Direct functional substitutes include other Maxim Integrated triple RS-485 receivers with fault detection, such as the MAX3098 series. Verify compatibility regarding the specific fault threshold voltages and the pinout arrangement of the DELAY and ALARM pins before substitution.

FAQ

How is the delayed fault output time determined?

The delay time for the ALARMD output is set by connecting an external capacitor from the DELAY pin to GND. The duration depends on the supply voltage and the capacitance value.

What fault conditions trigger the individual alarm outputs?

Individual alarm outputs (ALARMA, ALARMB, ALARMZ) trigger for open-circuit conditions, short-circuit conditions, low differential input voltage, and common-mode voltage range violations.

Does the device require pull-up resistors for the fault outputs?

No, the fault outputs are active push-pull and do not require external pull-up resistors to function correctly.