MAX490
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The MAX490 is a low-power, half-duplex RS-485/RS-422 transceiver designed for communication over long distances and in noisy environments. It features a robust design with enhanced noise immunity, making it ideal for industrial and commercial applications. The MAX490 is capable of data rates up to 2.5 Mbps and operates from a single 5V supply. It includes a driver and a receiver, with the driver featuring short-circuit current limiting and thermal shutdown for protection.
Key Features:
- Low power consumption
- ESD protection on RS-485 I/O pins
- Meets RS-485 and RS-422 standards
- Half-duplex communication
- Data rates up to 2.5 Mbps
- Operates from a single 5V supply
- Driver short-circuit current limit and thermal shutdown
- Robust noise immunity
- Standard 8-pin SOIC/DIP package
- Supply Voltage (VCC): 4.75V to 5.25V
- Driver Differential Output Voltage: ±1.5V (min)
- Receiver Input Sensitivity: ±200mV
- Receiver Input Resistance: 12kΩ (min)
- High-Level Input Voltage (VIH): 2V (min)
- Low-Level Input Voltage (VIL): 0.8V (max)
- High-Level Output Voltage (VOH): 3.5V (min) at Iout = -4mA
- Low-Level Output Voltage (VOL): 0.4V (max) at Iout = 4mA
- Data Rate: Up to 2.5 Mbps
- Operating Temperature Range: -40°C to +85°C
- Package: 8-pin SOIC/DIP
- Industrial Automation: Facilitates reliable communication in factory automation systems.
- Building Automation: Used in HVAC control systems and other building management applications.
- Embedded Systems: Provides robust communication in microcontroller and microprocessor-based projects.
- Networking Equipment: Enables long-distance data transfer in networking devices.
- Telecommunications: Ensures reliable data communication in telecommunication systems.
- Security Systems: Used in surveillance and access control systems for reliable data transfer.
Technical Specifications:
- Logic Family: CMOS
- Number of Channels: 3
- Switch Configuration: Single-Pole Double-Throw (SPDT)
- Supply Voltage Range: 3V to 15V
- “ON” Resistance (R_ON): 125Ω typical at V_DD = 10V
- “OFF” Leakage Current (I_OFF): ±100pA typical at V_DD = 10V
- Control Input Voltage (V_IH): 0.7 V_DD min, 0.3 V_DD max
- Maximum Operating Frequency: 40 MHz at V_DD = 10V
Applications:
- Signal routing and switching
- Analog and digital multiplexing
- Audio and video signal processing
- Data acquisition systems
- Test equipment