Overview
The MAX232BEASE+T is a dual driver/receiver integrated circuit produced by Analog Devices Inc./Maxim Integrated. This component is designed to facilitate communication between TTL/CMOS logic levels and RS-232 serial interface standards. It includes a capacitive voltage generator that enables the device to operate from a single 5V power supply, generating the necessary voltage levels for RS-232 communication.
The MAX232BEASE+T is widely used in various applications requiring serial communication, such as terminals, modems, and computers. It is known for its robust ESD protection and low power consumption, making it a reliable choice for battery-powered systems and other applications where power efficiency is crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 5V ± 0.5V | V |
| Supply Current | 8mA (typical) | mA |
| Data Rate | Up to 120kbit/s (MAX232), Up to 250kbit/s (MAX232E) | kbit/s |
| Input Threshold (Receiver) | 1.3V (typical) | V |
| Input Hysteresis (Receiver) | 0.5V (typical) | V |
| Input Levels (Receiver) | ±30V | V |
| Output Voltage (Driver) | ±7.5V (typical) | V |
| ESD Protection | ±15kV HBM, ±8kV IEC61000-4-2 contact discharge | kV |
| Package Type | 16-pin SOIC, PDIP, SOP | - |
| External Capacitors | Four 1µF capacitors | - |
Key Features
- Meets or exceeds TIA/EIA-232-F and ITU recommendation V.28 standards.
- Operates from a single 5V power supply using a charge pump with four external 1µF capacitors.
- Includes two drivers and two receivers.
- Robust ESD protection: ±15kV Human-body model (HBM), ±8kV IEC61000-4-2 contact discharge, and ±15kV IEC61000-4-2 air-gap discharge.
- Low supply current: 8mA typical.
- Receivers convert RS-232 inputs to 5V TTL/CMOS levels with a typical threshold of 1.3V and hysteresis of 0.5V.
- Drivers convert TTL/CMOS input levels to RS-232 levels.
- Outputs are protected against shorts to ground.
Applications
- TIA/EIA-232-F compliant systems.
- Battery-powered systems.
- Terminals and terminal servers.
- Modems and other serial communication devices.
- Computers and peripherals requiring RS-232 interfaces.
Q & A
- What is the primary function of the MAX232BEASE+T?
The MAX232BEASE+T is a dual driver/receiver that converts between TTL/CMOS logic levels and RS-232 serial interface standards.
- What is the operating voltage of the MAX232BEASE+T?
The device operates from a single 5V power supply.
- How many external capacitors are required for the MAX232BEASE+T?
Four external 1µF capacitors are required for the charge pump.
- What is the maximum data rate supported by the MAX232BEASE+T?
The MAX232 supports up to 120kbit/s, while the MAX232E supports up to 250kbit/s.
- What kind of ESD protection does the MAX232BEASE+T offer?
The device offers ±15kV HBM, ±8kV IEC61000-4-2 contact discharge, and ±15kV IEC61000-4-2 air-gap discharge protection.
- What are the typical input and output voltage levels for the receivers and drivers?
Receivers convert RS-232 inputs to 5V TTL/CMOS levels, while drivers convert TTL/CMOS inputs to RS-232 levels (typically ±7.5V).
- What types of applications is the MAX232BEASE+T commonly used in?
It is commonly used in battery-powered systems, terminals, modems, and computers requiring RS-232 interfaces.
- What is the typical supply current of the MAX232BEASE+T?
The typical supply current is 8mA.
- How do the receivers handle open or shorted inputs?
An open or shorted to ground input results in a high output on the receiver output (ROUT).
- What is the package type available for the MAX232BEASE+T?
The device is available in 16-pin SOIC, PDIP, and SOP packages.
