MAX232
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The MAX232 is a popular integrated circuit used for converting signals between RS-232 voltage levels and TTL (transistor-transistor logic) voltage levels. It includes two drivers and two receivers, making it suitable for interfacing microcontrollers and other TTL-level devices with RS-232 serial ports commonly found in computers and peripherals. The MAX232 eliminates the need for external components typically required for RS-232 communication, simplifying circuit design and reducing component count.
Key Features:
- Converts TTL voltage levels to RS-232 voltage levels and vice versa
- Integrated charge pump for voltage conversion
- Operates from a single +5V power supply
- Provides ±10V RS-232 compatible outputs
- Suitable for data rates up to 120 kbps
- Meets EIA/TIA-232-F standards
- Low power consumption
- Available in 16-pin DIP and SOIC packages
- Supply Voltage (VCC): +4.5V to +5.5V
- Data Rate: Up to 120 kbps
- Number of Drivers/Receivers: 2 drivers, 2 receivers
- Driver Output Voltage Swing (RS-232): ±5V (min)
- Driver Output Voltage Swing (TTL): 0V to VCC-1.5V
- Receiver Input Voltage Range (RS-232): ±30V
- Receiver Input Voltage Range (TTL): 0V to VCC
- Operating Temperature Range: -40°C to +85°C
- Package: 16-pin DIP/SOIC
- Serial Communication: Interfacing microcontrollers, UARTs, and TTL-level devices with RS-232 ports.
- Computer Peripherals: Connecting printers, modems, and terminals to computer systems.
- Embedded Systems: Serial communication in embedded applications requiring RS-232 compatibility.
- Industrial Control: Communication in industrial automation and control systems.
- Networking Equipment: RS-232 interface in networking devices.
- Consumer Electronics: Used in various consumer electronic devices requiring serial communication.
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