Overview
The MAX232EJE is a dual RS-232 driver and receiver integrated circuit produced by Analog Devices Inc./Maxim Integrated. Although the MAX232EJE is now obsolete and no longer manufactured, it was designed to provide a compact and efficient solution for RS-232 communication interfaces. This IC includes a capacitive voltage generator, enabling it to operate from a single 5V power supply and generate the necessary voltage levels for RS-232 communication without the need for a bipolar ±12V supply.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Supply Voltage (VCC) | –0.3 to 6 | V |
| Positive Output Supply Voltage (VS+) | VCC – 0.3 to 15 | V |
| Negative Output Supply Voltage (VS–) | –0.3 to –15 | V |
| Input Voltage (Driver) | –0.3 to VCC + 0.3 | V |
| Input Voltage (Receiver) | ±30 | V |
| Output Voltage (DOUT) | VS– – 0.3 to VS+ + 0.3 | V |
| Operating Virtual Junction Temperature | 150 | °C |
| Storage Temperature | –65 to 150 | °C |
| Data Rate | Up to 250 kbit/s | |
| ESD Protection | ±15kV HBM, ±8kV IEC61000-4-2 Contact Discharge, ±15kV IEC61000-4-2 Air-Gap Discharge |
Key Features
- Operates from a single 5V power supply with integrated charge pump circuitry, eliminating the need for a bipolar ±12V supply.
- Meets or exceeds TIA/RS-232-F and ITU recommendation V.28 standards.
- Includes two drivers and two receivers.
- ESD protection for RS-232 bus pins: ±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.
- Receivers can accept up to ±30V inputs and decode inputs as low as ±3 V.
Applications
- Battery-powered systems.
- Terminals.
- Modems.
- Computers.
- Any system requiring RS-232 communication interface.
Q & A
- What is the MAX232EJE?
The MAX232EJE is a dual RS-232 driver and receiver integrated circuit designed for RS-232 communication interfaces.
- Why is the MAX232EJE obsolete?
The MAX232EJE is no longer manufactured and has been replaced by newer models or alternatives.
- What power supply does the MAX232EJE require?
The MAX232EJE operates from a single 5V power supply.
- What are the key features of the MAX232EJE?
It includes integrated charge pump circuitry, meets TIA/RS-232-F standards, has ESD protection, and operates with low supply current.
- What is the data rate capability of the MAX232EJE?
The MAX232EJE can operate up to 250 kbit/s.
- What kind of ESD protection does the MAX232EJE have?
The MAX232EJE has ±15kV HBM, ±8kV IEC61000-4-2 Contact discharge, and ±15kV IEC61000-4-2 Air-gap discharge ESD protection.
- How many drivers and receivers does the MAX232EJE have?
The MAX232EJE includes two drivers and two receivers.
- What are the typical threshold and hysteresis values for the receivers?
The receivers have a typical threshold of 1.3V and hysteresis of 0.5V.
- What is the maximum input voltage the receivers can handle?
The receivers can handle up to ±30V inputs.
- In what types of systems is the MAX232EJE typically used?
The MAX232EJE is used in battery-powered systems, terminals, modems, computers, and any system requiring RS-232 communication interfaces.
