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Спецификации
| Атрибут | Ценность |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Active |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| NumberofDrivers/Receivers | 1/1 |
| Duplex | Full |
| ReceiverHysteresis | 70 mV |
| DataRate | 2.5Mbps |
| Voltage-Supply | 4.75V ~ 5.25V |
| OperatingTemperature | -40°C ~ 85°C |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
Обзор
Description
The MAX490ESA+T is a low-power transceiver designed for RS-485 and RS-422 communication applications. It is part of the MAX490 family and is often used for data transmission over long distances in industrial and commercial environments. This device operates from a single 5V power supply and is capable of full-duplex communication, meaning it can send and receive data simultaneously.
Key features include a fail-safe receiver, which ensures a known output state when the bus is idle, shorted, or open. The MAX490ESA+T also has a wide common-mode voltage range and is protected against excessive power dissipation by a thermal shutdown feature. Additionally, it has a slew-rate limited driver to minimize electromagnetic interference (EMI), making it suitable for environments sensitive to noise.
The ESA denotes the package type, an 8-pin SOIC, and the +T indicates that it is a tape-and-reel packaging option, typically used for automated manufacturing processes. This transceiver is widely used in networking, industrial control systems, and other communication applications.
Key features include a fail-safe receiver, which ensures a known output state when the bus is idle, shorted, or open. The MAX490ESA+T also has a wide common-mode voltage range and is protected against excessive power dissipation by a thermal shutdown feature. Additionally, it has a slew-rate limited driver to minimize electromagnetic interference (EMI), making it suitable for environments sensitive to noise.
The ESA denotes the package type, an 8-pin SOIC, and the +T indicates that it is a tape-and-reel packaging option, typically used for automated manufacturing processes. This transceiver is widely used in networking, industrial control systems, and other communication applications.
Equivalent
The MAX490ESA+T is a low-power RS-485/RS-422 transceiver. Equivalent products include:
1. Texas Instruments SN75176A
2. Texas Instruments THVD1450
3. Analog Devices ADM485
4. STMicroelectronics ST485E
5. ON Semiconductor NCS485
These alternatives might have different performance characteristics, so it’s essential to check their datasheets to ensure compatibility with your specific application requirements.
1. Texas Instruments SN75176A
2. Texas Instruments THVD1450
3. Analog Devices ADM485
4. STMicroelectronics ST485E
5. ON Semiconductor NCS485
These alternatives might have different performance characteristics, so it’s essential to check their datasheets to ensure compatibility with your specific application requirements.
Features
The MAX490ESA+T is a low-power, RS-485/RS-422 transceiver designed for multipoint communication on balanced bus transmission lines. Key features include:
1. Low Power Consumption: It operates with low power requirements, ideal for energy-efficient applications.
2. Wide Operating Voltage: It functions over a broad voltage range, typically up to 5.25V.
3. High Data Rate: Supports data rates up to 2.5Mbps, suitable for high-speed communication needs.
4. Enhanced ESD Protection: Offers robust electrostatic discharge protection for reliable performance in various environments.
5. Fail-Safe Operation: Ensures a known output state when inputs are open, shorted, or terminated but undriven.
6. Short-Circuit Protection: Protects against line faults, ensuring durability and longevity.
7. Thermal Shutdown: Built-in thermal shutdown feature to protect against overheating.
8. Industry Standard Pinout: Compatible with other similar RS-485 devices for seamless integration.
These features make the MAX490ESA+T suitable for applications in industrial automation, HVAC systems, and building control networks, where reliable and efficient communication is essential.
1. Low Power Consumption: It operates with low power requirements, ideal for energy-efficient applications.
2. Wide Operating Voltage: It functions over a broad voltage range, typically up to 5.25V.
3. High Data Rate: Supports data rates up to 2.5Mbps, suitable for high-speed communication needs.
4. Enhanced ESD Protection: Offers robust electrostatic discharge protection for reliable performance in various environments.
5. Fail-Safe Operation: Ensures a known output state when inputs are open, shorted, or terminated but undriven.
6. Short-Circuit Protection: Protects against line faults, ensuring durability and longevity.
7. Thermal Shutdown: Built-in thermal shutdown feature to protect against overheating.
8. Industry Standard Pinout: Compatible with other similar RS-485 devices for seamless integration.
These features make the MAX490ESA+T suitable for applications in industrial automation, HVAC systems, and building control networks, where reliable and efficient communication is essential.
Pinout
The MAX490ESA+T is an 8-pin SOIC (Small Outline Integrated Circuit) device. It is a low-power transceiver designed for RS-485 and RS-422 communication standards. Here are the pin functions:
1. RO (Receiver Output): Outputs the received data from the bus.
2. RE̅ (Receiver Enable, active low): Enables the receiver when low; when high, the receiver is disabled, and RO is high impedance.
3. DE (Driver Enable): Enables the driver outputs (A and B) when high; when low, the driver outputs are high impedance.
4. DI (Driver Input): Accepts data to be transmitted on the bus.
5. GND: Ground connection.
6. A (Non-inverting Driver Output/Receiver Input): Connects to the bus line.
7. B (Inverting Driver Output/Receiver Input): Connects to the bus line.
8. VCC: Power supply input.
The MAX490ESA+T is designed for bidirectional data communication on multipoint bus transmission lines, and has features like low power consumption, a fail-safe receiver, and a wide common-mode range, suitable for industrial applications.
1. RO (Receiver Output): Outputs the received data from the bus.
2. RE̅ (Receiver Enable, active low): Enables the receiver when low; when high, the receiver is disabled, and RO is high impedance.
3. DE (Driver Enable): Enables the driver outputs (A and B) when high; when low, the driver outputs are high impedance.
4. DI (Driver Input): Accepts data to be transmitted on the bus.
5. GND: Ground connection.
6. A (Non-inverting Driver Output/Receiver Input): Connects to the bus line.
7. B (Inverting Driver Output/Receiver Input): Connects to the bus line.
8. VCC: Power supply input.
The MAX490ESA+T is designed for bidirectional data communication on multipoint bus transmission lines, and has features like low power consumption, a fail-safe receiver, and a wide common-mode range, suitable for industrial applications.
Manufacturer
The MAX490ESA+T is manufactured by Analog Devices, Inc. Analog Devices is a multinational semiconductor company specializing in the design and manufacturing of analog, mixed-signal, and digital signal processing (DSP) integrated circuits. The company provides solutions for a wide range of industries, including automotive, communication, consumer electronics, healthcare, and industrial automation. Analog Devices is known for its innovative products in areas such as data conversion, signal processing, power management, and RF (radio frequency) technologies. They play a significant role in enabling technologies for a variety of applications, focusing on high performance and reliability.
Application
The MAX490ESA+T is a low-power RS-485/RS-422 transceiver designed for communication over long distances and in electrically noisy environments. It is commonly used in industrial automation systems, process control networks, and building automation systems due to its ability to support multipoint data transmission. Additionally, it's utilized in energy metering systems, telecommunications, and networked security systems. The transceiver is suitable for applications requiring high data integrity and robust performance in harsh conditions, such as HVAC systems, factory floors, and outdoor installations. Its low power consumption and fail-safe features make it ideal for battery-powered and remote applications.
Package
The MAX490ESA+T is in an 8-pin SOIC (Small Outline Integrated Circuit) package. The "+T" indicates it is supplied in a tape and reel format for automated assembly. This package type is commonly used for surface-mount applications.
