Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package / Case | Tube |
| Part Status | Active |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Full |
| Receiver Hysteresis | 70 mV |
| Data Rate | 250kbps |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Mounting Type | Through Hole |
Tổng quan
Description
The MAX488MJA is a low-power RS-485/RS-422 transceiver, designed for communication in multipoint systems. It is part of the MAX485 family, known for its low power consumption and high efficiency in data transmission. The device operates with a single 5V supply and is capable of data rates up to 250 kbps.
Key features include a wide common-mode voltage range, allowing it to function in noisy environments, and a current-limited output to protect against short circuits. The MAX488MJA offers a fail-safe feature, ensuring a default output when the bus is idle, open, or shorted. The device is also equipped with thermal shutdown protection.
The transceiver is housed in a plastic or ceramic DIP package, designed to meet stringent industrial and military standards, as indicated by the "MJA" suffix, suggesting extended temperature range and reliability. Its compact design and robust performance make it suitable for various applications, including industrial automation, networking, and remote sensing.
Key features include a wide common-mode voltage range, allowing it to function in noisy environments, and a current-limited output to protect against short circuits. The MAX488MJA offers a fail-safe feature, ensuring a default output when the bus is idle, open, or shorted. The device is also equipped with thermal shutdown protection.
The transceiver is housed in a plastic or ceramic DIP package, designed to meet stringent industrial and military standards, as indicated by the "MJA" suffix, suggesting extended temperature range and reliability. Its compact design and robust performance make it suitable for various applications, including industrial automation, networking, and remote sensing.
Equivalent
The MAX488MJA is a low-power RS-485/RS-422 transceiver. Equivalent products include:
1. TI SN75176: Similar functionality with RS-485/RS-422 standards.
2. Analog Devices ADM485: A compatible RS-485 transceiver.
3. Exar SP485: Offers similar performance and features.
4. ON Semiconductor AM26C31: Another option for similar data communication standards.
Ensure compatibility based on specific requirements like power supply range, data rate, and package type before substituting.
1. TI SN75176: Similar functionality with RS-485/RS-422 standards.
2. Analog Devices ADM485: A compatible RS-485 transceiver.
3. Exar SP485: Offers similar performance and features.
4. ON Semiconductor AM26C31: Another option for similar data communication standards.
Ensure compatibility based on specific requirements like power supply range, data rate, and package type before substituting.
Features
The MAX488MJA is a low-power transceiver for RS-485 and RS-422 communication protocols. Key features include:
1. Low Power Consumption: It operates with minimal power, making it suitable for battery-powered and energy-efficient applications.
2. High Data Rate: Supports data transmission rates up to 250 kbps.
3. Wide Operating Range: Functions in a supply voltage range of 4.75V to 5.25V, accommodating various system requirements.
4. Extended Temperature Range: Designed to operate in temperatures from -55°C to +125°C, suitable for industrial and military applications.
5. Short-Circuit Protection: Provides protection against short circuits, enhancing device reliability.
6. ESD Protection: Features electrostatic discharge protection for robust performance in harsh environments.
7. Fail-safe Operation: Ensures a known state on the receiver output when the bus is idle, open, or shorted.
8. Low-Voltage Logic Interface: Compatible with lower voltage systems, enhancing versatility.
These features make the MAX488MJA a reliable choice for robust serial communication in demanding conditions.
1. Low Power Consumption: It operates with minimal power, making it suitable for battery-powered and energy-efficient applications.
2. High Data Rate: Supports data transmission rates up to 250 kbps.
3. Wide Operating Range: Functions in a supply voltage range of 4.75V to 5.25V, accommodating various system requirements.
4. Extended Temperature Range: Designed to operate in temperatures from -55°C to +125°C, suitable for industrial and military applications.
5. Short-Circuit Protection: Provides protection against short circuits, enhancing device reliability.
6. ESD Protection: Features electrostatic discharge protection for robust performance in harsh environments.
7. Fail-safe Operation: Ensures a known state on the receiver output when the bus is idle, open, or shorted.
8. Low-Voltage Logic Interface: Compatible with lower voltage systems, enhancing versatility.
These features make the MAX488MJA a reliable choice for robust serial communication in demanding conditions.
Pinout
The MAX488MJA is an RS-485/RS-422 transceiver IC. It typically comes in an 8-pin package. Here's a brief overview of its pin functions:
1. RO (Pin 1): Receiver Output - Outputs the received data.
2. RE̅ (Pin 2): Receiver Enable - Active-low input to enable the receiver.
3. DE (Pin 3): Driver Enable - Controls the driver, active-high input.
4. DI (Pin 4): Driver Input - Input for the data that needs to be transmitted.
5. GND (Pin 5): Ground - The reference point for all signals.
6. A (Pin 6): Non-inverting Receiver Input/Driver Output.
7. B (Pin 7): Inverting Receiver Input/Driver Output.
8. VCC (Pin 8): Supply Voltage - Power supply input.
The MAX488 is designed for low power, high-speed communication in RS-485/RS-422 networks, supporting up to 32 transceivers on the bus.
1. RO (Pin 1): Receiver Output - Outputs the received data.
2. RE̅ (Pin 2): Receiver Enable - Active-low input to enable the receiver.
3. DE (Pin 3): Driver Enable - Controls the driver, active-high input.
4. DI (Pin 4): Driver Input - Input for the data that needs to be transmitted.
5. GND (Pin 5): Ground - The reference point for all signals.
6. A (Pin 6): Non-inverting Receiver Input/Driver Output.
7. B (Pin 7): Inverting Receiver Input/Driver Output.
8. VCC (Pin 8): Supply Voltage - Power supply input.
The MAX488 is designed for low power, high-speed communication in RS-485/RS-422 networks, supporting up to 32 transceivers on the bus.
Manufacturer
The MAX488MJA is manufactured by Analog Devices, Inc. They are a multinational semiconductor company that specializes in designing and manufacturing analog, mixed-signal, and digital signal processing (DSP) integrated circuits. The company serves a wide range of industries, including communications, healthcare, automotive, industrial, and consumer electronics.
Application
The MAX488MJA is a low-power, low-noise RS-485/RS-422 transceiver designed for robust communication in harsh environments. Its application areas include industrial automation systems, process control networks, and building automation systems where reliable long-distance data transmission is critical. Additionally, it can be used in security systems, access control, and energy management systems. The MAX488MJA is suitable for applications requiring balanced data transmission, such as data acquisition systems, remote sensors, and small computer networks. Its ability to operate in environments with significant electrical noise makes it ideal for use in factory floor automation and other industrial communication applications.
Package
The MAX488MJA is typically available in an 8-pin SOIC (Small Outline Integrated Circuit) package. This package type is compact and suitable for surface mounting on printed circuit boards (PCBs), providing ease of use in various electronic applications.
