Specifications
| Attribute | Value |
| Package | Tube |
| ProductStatus | Active |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| NumberofDrivers/Receivers | 1/1 |
| Duplex | Half |
| ReceiverHysteresis | 70 mV |
| DataRate | 2.5Mbps |
| Voltage-Supply | 4.75V ~ 5.25V |
| OperatingTemperature | -55°C ~ 125°C (TA) |
| MountingType | Through Hole |
| Package/Case | 8-CDIP (0.300, 7.62mm) |
Overview
Description
The MAX485MJA is a low-power, low-cost RS-485/RS-422 transceiver designed for multipoint communication on balanced bus transmission lines. It is capable of supporting data rates up to 2.5 Mbps and is used in systems requiring reliable data transfer over long distances in industrial and telecommunications applications.
Key features include a wide range of operating voltages (from 3.3V to 5V), low power consumption with a typical operating current of 300 µA, and a shutdown mode that reduces the current to 1 µA. The device supports up to 32 transceivers on the bus, making it suitable for complex networked environments.
The MAX485MJA provides full-duplex and half-duplex communication modes, ensuring flexibility in various applications. It also features a fail-safe receiver input for open-circuit, short-circuit, and idle-bus conditions, enhancing reliability. Furthermore, the transceiver includes thermal shutdown protection and allows for ±15 kV ESD protection, ensuring robustness in harsh environments.
Overall, the MAX485MJA is valued for its efficiency, affordability, and reliable performance in serial communication systems.
Key features include a wide range of operating voltages (from 3.3V to 5V), low power consumption with a typical operating current of 300 µA, and a shutdown mode that reduces the current to 1 µA. The device supports up to 32 transceivers on the bus, making it suitable for complex networked environments.
The MAX485MJA provides full-duplex and half-duplex communication modes, ensuring flexibility in various applications. It also features a fail-safe receiver input for open-circuit, short-circuit, and idle-bus conditions, enhancing reliability. Furthermore, the transceiver includes thermal shutdown protection and allows for ±15 kV ESD protection, ensuring robustness in harsh environments.
Overall, the MAX485MJA is valued for its efficiency, affordability, and reliable performance in serial communication systems.
Equivalent
The MAX485MJA is a low-power RS-485/RS-422 transceiver. Equivalent products include:
1. SN75176A by Texas Instruments
2. ADM485 by Analog Devices
3. LTC485 by Linear Technology
4. SP485 by Exar Corporation
5. AM26C31 by Texas Instruments
These alternatives offer similar functionalities, such as differential signaling for long-distance communication and low-power consumption, catering to similar industrial and commercial applications. Always verify compatibility based on specific requirements such as supply voltage, data rate, and temperature range.
1. SN75176A by Texas Instruments
2. ADM485 by Analog Devices
3. LTC485 by Linear Technology
4. SP485 by Exar Corporation
5. AM26C31 by Texas Instruments
These alternatives offer similar functionalities, such as differential signaling for long-distance communication and low-power consumption, catering to similar industrial and commercial applications. Always verify compatibility based on specific requirements such as supply voltage, data rate, and temperature range.
Features
The MAX485MJA is a low-power, low-slew rate transceiver designed for RS-485 and RS-422 communication. Key features include:
1. Low Power Consumption: It operates on a single 5V power supply and consumes minimal power, making it suitable for battery-powered applications.
2. ESD Protection: The transceiver provides robust electrostatic discharge (ESD) protection, ensuring resilience against static damage.
3. Data Transmission Rate: Supports data rates up to 2.5 Mbps, allowing for efficient high-speed data communication.
4. Reduced Slew Rate: Features slew-rate limiting to minimize electromagnetic interference in sensitive environments.
5. Half-Duplex Communication: Designed for half-duplex operations, enabling bidirectional data exchange on a single pair of twisted wires.
6. Extended Temperature Range: Operates over a wide temperature range, making it suitable for industrial applications.
7. Fail-Safe Operation: Includes fail-safe circuitry to ensure reliable operation even when the bus is idle or open.
8. Compact Package: Available in a small package, aiding in space-constrained designs.
These features make the MAX485MJA a reliable choice for robust and efficient serial communication in various applications.
1. Low Power Consumption: It operates on a single 5V power supply and consumes minimal power, making it suitable for battery-powered applications.
2. ESD Protection: The transceiver provides robust electrostatic discharge (ESD) protection, ensuring resilience against static damage.
3. Data Transmission Rate: Supports data rates up to 2.5 Mbps, allowing for efficient high-speed data communication.
4. Reduced Slew Rate: Features slew-rate limiting to minimize electromagnetic interference in sensitive environments.
5. Half-Duplex Communication: Designed for half-duplex operations, enabling bidirectional data exchange on a single pair of twisted wires.
6. Extended Temperature Range: Operates over a wide temperature range, making it suitable for industrial applications.
7. Fail-Safe Operation: Includes fail-safe circuitry to ensure reliable operation even when the bus is idle or open.
8. Compact Package: Available in a small package, aiding in space-constrained designs.
These features make the MAX485MJA a reliable choice for robust and efficient serial communication in various applications.
Pinout
The MAX485MJA is an integrated circuit used for RS-485 and RS-422 communication protocols. It features an 8-pin configuration, each serving a specific function:
1. RO (Receiver Output): Outputs the received data.
2. RE̅ (Receiver Enable): Active low input to enable the receiver.
3. DE (Driver Enable): Active high input to enable the driver.
4. DI (Driver Input): Inputs the data to be transmitted.
5. GND (Ground): Circuit ground reference.
6. A (Non-Inverting Driver Output/Receiver Input): Positive data line for differential signals.
7. B (Inverting Driver Output/Receiver Input): Negative data line for differential signals.
8. VCC (Supply Voltage): Power supply input, typically 5V.
The MAX485MJA enables differential data transmission over long distances and in noisy environments, making it suitable for industrial and telecommunications applications. It is designed for low power consumption and can operate at data rates up to 2.5 Mbps.
1. RO (Receiver Output): Outputs the received data.
2. RE̅ (Receiver Enable): Active low input to enable the receiver.
3. DE (Driver Enable): Active high input to enable the driver.
4. DI (Driver Input): Inputs the data to be transmitted.
5. GND (Ground): Circuit ground reference.
6. A (Non-Inverting Driver Output/Receiver Input): Positive data line for differential signals.
7. B (Inverting Driver Output/Receiver Input): Negative data line for differential signals.
8. VCC (Supply Voltage): Power supply input, typically 5V.
The MAX485MJA enables differential data transmission over long distances and in noisy environments, making it suitable for industrial and telecommunications applications. It is designed for low power consumption and can operate at data rates up to 2.5 Mbps.
Manufacturer
The MAX485MJA is manufactured by Analog Devices, Inc., a leading global technology company specializing in the design and production of analog, mixed-signal, and digital signal processing integrated circuits. Analog Devices provides high-performance solutions for a wide range of applications in various industries, including communications, automotive, industrial, healthcare, and consumer electronics. The company is known for its innovation and quality in creating products that enable efficient and reliable electronic systems.
Application
The MAX485MJA is a low-power, RS-485/RS-422 transceiver designed for communication networks. Its application areas include industrial automation, building automation systems, and process control systems, where robust and reliable data transmission is critical. It is also used in point-of-sale (POS) systems, networked sensors, and remote metering due to its ability to support long-distance communication and noise immunity. Additionally, the device is suitable for interfacing between microcontrollers or other digital systems and RS-485 communication networks, making it ideal for use in multi-drop and data acquisition systems. Its low power consumption and wide temperature range make it suited for portable and harsh environment applications.
Package
The MAX485MJA is typically available in an 8-pin SOIC package. It is a low-power transceiver for RS-485 and RS-422 communication, designed for multipoint transmission on long communication links.
