MAX489ESD

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MAX489ESD

+BOM

RS-485/RS-422 TRANSCVR

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Specifications

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Part Status Obsolete

Overview

Description

The MAX489ESD is a low-power, RS-485/RS-422 transceiver designed for data communication over long distances and in electrically noisy environments. It features both transmitter and receiver functions, allowing for full-duplex communication. The device operates from a single 5V power supply and supports data rates up to 250 kbps. It is engineered with enhanced electrostatic discharge (ESD) protection, making it robust against electrical surges and suitable for industrial applications.
Key features include a wide common-mode voltage range, thermal shutdown protection, and short-circuit protection to prevent damage from overload conditions. The MAX489ESD also incorporates a fail-safe receiver input, which ensures a stable logic-high output when the inputs are open or shorted. The device comes in small footprint packages, making it ideal for space-constrained applications.
Typical applications for the MAX489ESD include industrial automation, building automation systems, and any application requiring reliable data transmission in harsh environments. Its low power consumption and durable design make it a versatile choice for robust communication solutions.

Equivalent

The MAX489ESD is a low-power, TTL/RS-485/RS-422 transceiver. Equivalent products include:
1. Texas Instruments SN75176A
2. Texas Instruments MAX485
3. Texas Instruments SN65HVD485E
4. Analog Devices ADM485
5. STMicroelectronics ST485
These alternatives offer similar functionalities and can be used in applications requiring RS-485/RS-422 communication. Always check the specific datasheets to ensure compatibility with your requirements.

Features

The MAX489ESD is a low-power, RS-485/RS-422 transceiver designed for balanced data transmission. Key features include:
1. Low Power Consumption: It operates with minimal power, making it suitable for battery-powered and energy-efficient applications.
2. Wide Supply Voltage Range: It functions over a supply voltage range of 4.75V to 5.25V.
3. High Data Rate: Supports data transmission rates up to 250 kbps.
4. True Fail-Safe: The receiver output remains high when inputs are open, shorted, or terminated but undriven, providing a fail-safe mechanism.
5. Extended ESD Protection: Enhanced Electrostatic Discharge (ESD) protection ensures robust operation in harsh environments.
6. Short-Circuit Protection: Includes features that protect the device against short circuits.
7. Thermal Shutdown: Automatically disables the device when it overheats, preventing damage.
8. Half-Duplex Operation: Allows for two-way communication over a single pair of wires, reducing wiring complexity.
These features make the MAX489ESD suitable for various industrial and commercial communication systems.

Pinout

The MAX489ESD is a low-power, RS-485/RS-422 transceiver designed for data communication. It typically comes in an 8-pin package. The pin functions are as follows:
1. RO (Receiver Output): Outputs the received data from the bus.
2. RE̅ (Receiver Enable): Active-low input to enable or disable the receiver.
3. DE (Driver Enable): Controls the operation of the driver; high enables the driver.
4. DI (Driver Input): Input data for the driver to send onto the bus.
5. GND: Ground reference for the device.
6. A (Non-inverting Driver Output/Receiver Input): One of the differential bus lines.
7. B (Inverting Driver Output/Receiver Input): The other differential bus line.
8. VCC: Power supply input for the device, typically 5V.
The MAX489ESD is designed for low power consumption and can operate at up to 250 kbps, making it suitable for communication over long distances or in noisy environments.

Manufacturer

The MAX489ESD is manufactured by Maxim Integrated, which is a semiconductor company. Maxim Integrated specializes in designing, manufacturing, and selling analog and mixed-signal integrated circuits. These products are used in a wide range of applications, including consumer electronics, automotive, communications, computing, and industrial systems. Maxim Integrated focuses on providing highly integrated solutions to improve system performance and efficiency, often emphasizing power management, signal processing, and connectivity functions. In 2021, Maxim Integrated was acquired by Analog Devices, Inc., another prominent player in the semiconductor industry, expanding its reach and product offerings.

Application

The MAX489ESD is a low-power transceiver designed for RS-485 and RS-422 communication applications. Its application areas include industrial automation, remote meter reading, building automation, process control networks, and data acquisition systems. The device is ideal for use in environments that require robust communication over long distances and in the presence of electrical noise. Its electrostatic discharge (ESD) protection makes it suitable for applications where the device might be exposed to high static voltages, such as in industrial and infrastructure settings. Additionally, its low power consumption is advantageous for battery-powered and energy-efficient systems.

Package

The MAX489ESD is a RS-485/RS-422 transceiver and it is typically available in an 8-pin SOIC (Small Outline Integrated Circuit) package.

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