Overview
The MAX232BEAWE+T is a dual driver/receiver integrated circuit designed by Maxim Integrated, now part of Analog Devices Inc. This component is part of the MAX220–MAX249 family, which is intended for EIA/TIA-232E and V.28/V.24 communications interfaces. The MAX232BEAWE+T is notable for its ability to operate from a single 5V power supply, eliminating the need for a bipolar ±12V supply. It includes a capacitive voltage generator that uses four external capacitors to generate the necessary voltage levels for RS-232 communication.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Supply Voltage | +4.5V to +5.5V | Single 5V power supply operation |
| Supply Current | 8mA typical | Low power consumption |
| Data Rate | Up to 120kbps | Maximum data rate for RS-232 communication |
| Drivers/Receivers | Two drivers, two receivers | Dual driver/receiver configuration |
| Input Levels | ±30V | Acceptable input voltage range for receivers |
| Output Voltage Swing | ±5V to ±9V | Output voltage swing for drivers loaded with 3kΩ to ground |
| ESD Protection | ±15kV HBM, ±8kV IEC61000-4-2 contact discharge, ±15kV IEC61000-4-2 air-gap discharge | Robust ESD protection for RS-232 pins |
| Threshold and Hysteresis | Typical threshold: 1.3V, typical hysteresis: 0.5V | Receiver input threshold and hysteresis values |
Key Features
- Meets or exceeds TIA/EIA-232-F and ITU recommendation V.28 specifications
- Integrated charge pump circuitry for single 5V supply operation
- Low supply current: 8mA typical
- High ESD protection: ±15kV Human-body model (HBM), ±8kV IEC61000-4-2 contact discharge, ±15kV IEC61000-4-2 air-gap discharge
- Two drivers and two receivers
- Accepts ±30V input levels and converts to 5V TTL/CMOS levels
- Operates up to 120kbps data rate
- Fail-safe for shorted and open inputs
Applications
- TIA/EIA-232-F and V.28/V.24 communications interfaces
- Battery-powered systems
- Terminals and modems
- Computers and other RS-232 compatible devices
- Harsh environments where frequent RS-232 connection changes occur, such as in notebook computers
Q & A
- What is the MAX232BEAWE+T used for?
The MAX232BEAWE+T is used for RS-232 communication interfaces, converting TTL/CMOS levels to RS-232 levels and vice versa.
- What is the power supply requirement for the MAX232BEAWE+T?
The MAX232BEAWE+T operates from a single 5V power supply.
- What is the maximum data rate supported by the MAX232BEAWE+T?
The MAX232BEAWE+T supports data rates up to 120kbps.
- How many drivers and receivers does the MAX232BEAWE+T have?
The MAX232BEAWE+T has two drivers and two receivers.
- What level of ESD protection does the MAX232BEAWE+T offer?
The MAX232BEAWE+T offers ±15kV HBM, ±8kV IEC61000-4-2 contact discharge, and ±15kV IEC61000-4-2 air-gap discharge protection.
- What are the typical threshold and hysteresis values for the receivers in the MAX232BEAWE+T?
The typical threshold is 1.3V, and the typical hysteresis is 0.5V.
- Can the MAX232BEAWE+T handle high input voltages?
Yes, the MAX232BEAWE+T can accept input voltages up to ±30V.
- What types of applications benefit from using the MAX232BEAWE+T?
Applications include battery-powered systems, terminals, modems, computers, and harsh environments where frequent RS-232 connection changes occur.
- Does the MAX232BEAWE+T require external components for operation?
Yes, it requires four external capacitors for the charge pump circuitry.
- What is the typical supply current of the MAX232BEAWE+T?
The typical supply current is 8mA.
