MAX485ESA+

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MAX485ESA+

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IC TRANSCEIVER HALF 1/1 8SOIC

  • Nhà sản xuấtAnalog Devices Inc./Maxim tích hợp

  • Ông. Phần #MAX485ESA+

  • Có sẵn6292

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Thông số kỹ thuật

thuộc tính Giá trị
Part Status Active
Base Product Number MAX485
Type Transceiver
Protocol RS422, RS485
Number of Drivers / Receivers 1/1
Duplex Half
Data Rate 2.5Mbps
Voltage - Supply 4.75V ~ 5.25V
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC
Packaging Tube
Receiver Hysteresis 70 mV

Tổng quan

Description

The MAX485ESA+ is a low-power transceiver for RS-485 and RS-422 communication protocols, designed by Maxim Integrated. It facilitates bidirectional data transmission over long distances, making it ideal for industrial automation and remote device communication. The device operates with a supply voltage range of 4.75V to 5.25V and features a low current drain, which conserves power in battery-operated applications.
Key features include a slew rate limited driver that minimizes electromagnetic interference (EMI) and reduces reflections caused by improperly terminated cables, supporting data rates up to 2.5 Mbps. The MAX485ESA+ is equipped with a fail-safe feature for open-circuit, short-circuit, and idle-bus conditions, ensuring reliable communication. It also offers a 1/8 unit load receiver input impedance, allowing up to 256 transceivers on the same bus.
The device comes in an 8-pin SOIC package and is designed for a temperature range of -40°C to +85°C, suitable for various industrial environments. Its robust design and reliable performance make the MAX485ESA+ a versatile choice for robust data communication systems.

Equivalent

The MAX485ESA+ is a low-power transceiver for RS-485 and RS-422 communications. Equivalent products include:
1. TI SN75176B
2. TI SN65HVD1785
3. Analog Devices ADM485
4. STMicroelectronics SP485E
5. NXP PCA82C250
These alternatives provide similar functionalities with slight variations in specifications and features. Always check the datasheet to ensure compatibility with your specific application requirements.

Features

The MAX485ESA+ is a low-power transceiver for RS-485 and RS-422 communication protocols. Key features include:
1. Low Power Consumption: Designed for low power use, drawing only 300 µA in standby mode.
2. Wide Supply Voltage: Operates on a single 5V supply.
3. ESD Protection: Provides electrostatic discharge protection up to ±15kV using the Human Body Model.
4. High Data Rate: Supports data transmission speeds up to 2.5 Mbps.
5. Fail-Safe Functionality: Ensures a known output state when the input is open, shorted, or terminated but undriven.
6. Extended Temperature Range: Operates over a temperature range of -40°C to +85°C.
7. Driver/Receiver Enable: Separate enables for the driver and receiver facilitate the creation of a half-duplex transceiver.
8. Slew-Rate Limiting: Provides reduced EMI and reflections in networked environments.
These features make the MAX485ESA+ ideal for applications requiring robust, efficient serial communication in industrial and commercial settings.

Pinout

The MAX485ESA+ is an RS-485/RS-422 transceiver IC designed for low-power communication applications. It comes in an 8-pin SOIC package. Below is the pin configuration and their functions:
1. RO (Receiver Output): Outputs the received data from the bus.
2. RE¯ (Receiver Enable): Active-low input to enable or disable the receiver.
3. DE (Driver Enable): Enables the driver when high.
4. DI (Driver Input): Input for the data to be sent on the bus.
5. GND: Ground reference for the device.
6. A (Non-Inverting Receiver Input/Driver Output): RS-485 bus line.
7. B (Inverting Receiver Input/Driver Output): RS-485 bus line.
8. VCC: Positive supply voltage input, typically +5V.
The MAX485ESA+ is used for differential communication and is capable of operating at data rates up to 2.5 Mbps. Its low-power standby mode makes it ideal for power-sensitive applications.

Manufacturer

The MAX485ESA+ is manufactured by Analog Devices, Inc. It was originally a product of Maxim Integrated, which merged with Analog Devices in 2021. Analog Devices is a multinational company that specializes in the design and manufacturing of analog, mixed-signal, and digital signal processing (DSP) integrated circuits used in electronic equipment. The company serves various industries, including industrial automation, healthcare, automotive, communications, and consumer electronics, providing components for applications like data conversion, signal processing, and power management.

Application

The MAX485ESA+ is a low-power transceiver for RS-485 and RS-422 communication protocols, used primarily in industrial and commercial applications. Key application areas include:
1. Industrial Automation: Facilitates reliable data transmission between equipment and control systems.
2. Building Automation: Supports communication in systems like HVAC, lighting, and security.
3. Telecommunications: Used in network infrastructure for high-speed data transfer.
4. Energy Management: Integral in smart grid and renewable energy systems for monitoring and control.
5. Security Systems: Enables robust communication in surveillance and access control systems.
6. Embedded Systems: Used in microcontroller-based applications requiring serial communication.
Its robust performance in harsh environments makes it ideal for these applications.

Package

The MAX485ESA+ is a low-power, RS-485/RS-422 transceiver. It comes in an 8-pin SOIC (Small Outline Integrated Circuit) package, which is surface-mounted. This package type is compact, making it suitable for applications requiring efficient use of PCB space.

Frequently Asked Questions


Q: What is the maximum data rate supported by the MAX485ESA+?
A: The MAX485ESA+ supports a data rate of up to 2.5 Mbps, suitable for high-speed RS-485/RS-422 communication.


Q: Can this transceiver operate with a 3.3V supply?
A: No, it requires a 4.75V to 5.25V supply; for 3.3V systems, consider a compatible low-voltage variant.


Q: Does the MAX485ESA+ support full-duplex communication?
A: No, it is a half-duplex transceiver, enabling bidirectional communication but not simultaneously.


Q: What is the receiver hysteresis value of this device?
A: The receiver hysteresis is 70 mV, providing noise immunity for reliable data reception in noisy environments.


Q: What is the operating temperature range for the MAX485ESA+?
A: It operates from -40°C to 85°C, making it suitable for industrial and harsh environment applications.


Q: How many drivers and receivers are integrated in this IC?
A: It integrates one driver and one receiver (1/1) for single-channel RS-485/RS-422 communication.


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