Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package | Tube |
| ProductStatus | Obsolete |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| NumberofDrivers/Receivers | 1/1 |
| Duplex | Half |
| ReceiverHysteresis | 70 mV |
| DataRate | 250kbps |
| Voltage-Supply | 4.75V ~ 5.25V |
| OperatingTemperature | -40°C ~ 85°C |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
Tổng quan
Description
The MAX487ESA is a low-power transceiver designed for RS-485 and RS-422 communication networks. It is part of the MAX487 family, known for its ability to operate efficiently in harsh environments and over long distances. The device is capable of data transmission rates up to 250 kbps and can operate over a wide voltage range, typically from 4.75V to 5.25V.
Key features include a reduced supply current, typically 120 µA, making it suitable for battery-powered applications. The MAX487ESA is designed to handle up to 32 nodes on the network, ensuring robust communication in multi-drop configurations. It includes built-in short-circuit protection and thermal shutdown features to enhance reliability and safety.
The device comes in an 8-pin SOIC package, making it compact and easy to integrate into various designs. Additionally, the MAX487ESA features a fail-safe receiver input, ensuring a known output state when inputs are open or shorted. This transceiver is mainly used in industrial automation, building control systems, and any application requiring reliable data communication over long distances.
Key features include a reduced supply current, typically 120 µA, making it suitable for battery-powered applications. The MAX487ESA is designed to handle up to 32 nodes on the network, ensuring robust communication in multi-drop configurations. It includes built-in short-circuit protection and thermal shutdown features to enhance reliability and safety.
The device comes in an 8-pin SOIC package, making it compact and easy to integrate into various designs. Additionally, the MAX487ESA features a fail-safe receiver input, ensuring a known output state when inputs are open or shorted. This transceiver is mainly used in industrial automation, building control systems, and any application requiring reliable data communication over long distances.
Equivalent
The MAX487ESA is a low-power RS-485/RS-422 transceiver. Equivalent products include:
1. Texas Instruments SN75176A
2. TI THVD1450
3. Analog Devices ADM485
4. STMicroelectronics ST485
5. TI MAX3080
These alternatives share similar functionalities like half-duplex communication, low power consumption, and compatibility with RS-485/RS-422 standards. Always verify the specific application requirements before substituting components.
1. Texas Instruments SN75176A
2. TI THVD1450
3. Analog Devices ADM485
4. STMicroelectronics ST485
5. TI MAX3080
These alternatives share similar functionalities like half-duplex communication, low power consumption, and compatibility with RS-485/RS-422 standards. Always verify the specific application requirements before substituting components.
Features
The MAX487ESA is a half-duplex, low-power transceiver designed for RS-485 and RS-422 communication protocols. Key features include:
1. Low Power Consumption: It operates with reduced power demand, making it suitable for battery-powered applications.
2. Wide Supply Voltage Range: It functions efficiently over a voltage range of 3.3V to 5.5V.
3. High Data Rate: Supports data rates up to 250 kbps, facilitating fast communication in networked systems.
4. Extended ESD Protection: It offers enhanced electrostatic discharge protection to improve durability and reliability.
5. Low Current Shutdown Mode: Includes a shutdown mode that reduces supply current to 1µA.
6. Fail-safe Receiver: Ensures reliable operation by defaulting to a known state if the bus is idle, open, or shorted.
7. Small Package Size: Comes in a space-saving SO-8 package, ideal for compact designs.
8. Temperature Range: Operates over an extended temperature range, typically -40°C to +85°C.
These features make the MAX487ESA well-suited for industrial, commercial, and consumer applications requiring robust and efficient data communication.
1. Low Power Consumption: It operates with reduced power demand, making it suitable for battery-powered applications.
2. Wide Supply Voltage Range: It functions efficiently over a voltage range of 3.3V to 5.5V.
3. High Data Rate: Supports data rates up to 250 kbps, facilitating fast communication in networked systems.
4. Extended ESD Protection: It offers enhanced electrostatic discharge protection to improve durability and reliability.
5. Low Current Shutdown Mode: Includes a shutdown mode that reduces supply current to 1µA.
6. Fail-safe Receiver: Ensures reliable operation by defaulting to a known state if the bus is idle, open, or shorted.
7. Small Package Size: Comes in a space-saving SO-8 package, ideal for compact designs.
8. Temperature Range: Operates over an extended temperature range, typically -40°C to +85°C.
These features make the MAX487ESA well-suited for industrial, commercial, and consumer applications requiring robust and efficient data communication.
Pinout
The MAX487ESA is an 8-pin IC designed for RS-485/RS-422 communication networks. It is a low-power transceiver that allows for bidirectional data transmission over a differential pair of wires. The pin functions are typically as follows:
1. RO (Receiver Output): Outputs the received data.
2. RE̅ (Receiver Output Enable): An active-low input that enables/disables the receiver.
3. DE (Driver Enable): Controls the driver output, active-high.
4. DI (Driver Input): Accepts the data to be transmitted.
5. GND: Ground reference for the IC.
6. A (Non-inverting Receiver Input/Driver Output): Positive line for differential signals.
7. B (Inverting Receiver Input/Driver Output): Negative line for differential signals.
8. VCC: Positive supply voltage input.
The MAX487ESA is aimed at low-power applications with reduced slew rates for minimizing EMI and can operate at a data rate up to 250 kbps.
1. RO (Receiver Output): Outputs the received data.
2. RE̅ (Receiver Output Enable): An active-low input that enables/disables the receiver.
3. DE (Driver Enable): Controls the driver output, active-high.
4. DI (Driver Input): Accepts the data to be transmitted.
5. GND: Ground reference for the IC.
6. A (Non-inverting Receiver Input/Driver Output): Positive line for differential signals.
7. B (Inverting Receiver Input/Driver Output): Negative line for differential signals.
8. VCC: Positive supply voltage input.
The MAX487ESA is aimed at low-power applications with reduced slew rates for minimizing EMI and can operate at a data rate up to 250 kbps.
Manufacturer
The MAX487ESA is manufactured by Maxim Integrated, which is a company known for designing and producing analog and mixed-signal integrated circuits. Maxim Integrated, now part of Analog Devices, Inc. after its acquisition in 2021, specializes in developing a wide range of semiconductor products that are used in various applications, including consumer electronics, automotive, communications, and industrial sectors. The company is recognized for its expertise in power management, interface, analog signal processing, and digital processing solutions.
Application
The MAX487ESA is a low-power, RS-485/RS-422 transceiver commonly used in applications requiring robust serial communication. Key application areas include industrial automation, where it facilitates reliable data exchange over long distances and in noisy environments. It's ideal for use in building automation systems, such as HVAC and security systems, due to its ability to support multiple devices on the same bus. The MAX487ESA is also suitable for remote sensing and data acquisition systems, owing to its low power consumption and capability to operate over extended cable lengths. Additionally, it finds applications in embedded systems, networking equipment, and any setup requiring differential signaling for improved noise immunity.
Package
The MAX487ESA is a low-power RS-485/RS-422 transceiver in an 8-pin SOIC (Small Outline Integrated Circuit) package.
