MAX485 transceiver
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The MAX485 is a low-power transceiver for RS-485 and RS-422 communication. It features a half-duplex communication mode, which means that the transceiver can either transmit or receive data at a given time, but not both simultaneously. This transceiver is designed to operate with a single 5V power supply and provides robust performance for high-speed data transmission over long distances. The MAX485 is ideal for applications requiring minimal power consumption and reliable data transfer in electrically noisy environments.
Key Features:
- Low power consumption
- Half-duplex communication
- Meets RS-485 and RS-422 standards
- Data rates up to 2.5 Mbps
- Single 5V supply operation
- Short-circuit current limiting
- Thermal shutdown protection
- High receiver input impedance
- Allows up to 32 transceivers on the bus
- Available in 8-pin DIP and SOIC packages
- 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 DIP/SOIC
- Industrial Automation: Ensures reliable communication in factory automation and process control systems.
- Building Automation: Used in HVAC control, lighting control, and security systems.
- Embedded Systems: Provides robust data transfer in microcontroller-based projects.
- Networking Equipment: Enables data transmission over long distances in networking hardware.
- Telecommunications: Facilitates communication in telecom systems and devices.
- 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