Overview
The MAX232EIDR from Texas Instruments is a dual RS-232 driver and receiver integrated circuit designed to meet or exceed the requirements of TIA/RS-232-F and ITU recommendation V.28. This device operates from a single 5V power supply and includes a capacitive voltage generator that uses four external 1µF capacitors to generate the necessary voltage levels for RS-232 communication. It features two drivers and two receivers, providing full-duplex communication capabilities.
The MAX232EIDR is notable for its robust ESD protection, offering ±15kV Human-body model (HBM) and ±8kV/±15kV IEC61000-4-2 contact and air-gap discharge protection, respectively. This makes it suitable for a wide range of applications where reliability and protection against electrical surges are critical.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 4.5 - 5.5 | V |
| Operating Temperature | -40 to 85 | °C |
| Data Rate | Up to 250 | kbit/s |
| Number of Drivers | 2 | |
| Number of Receivers | 2 | |
| ESD Protection | ±15kV HBM, ±8kV/±15kV IEC61000-4-2 | |
| Package Type | 16-SOIC | |
| Mounting Type | Surface Mount | |
| Supply Current | 10 mA (typical) | |
| Propagation Delay | 0.5 µs | |
| RoHS Compliance | Yes |
Key Features
- Meets or exceeds TIA/RS-232-F and ITU recommendation V.28 standards.
- Operates from a single 5V power supply with 1µF charge-pump capacitors.
- Includes two drivers and two receivers for full-duplex communication.
- Robust ESD protection: ±15kV HBM, ±8kV/±15kV IEC61000-4-2 contact and air-gap discharge.
- Low supply current: 10 mA typical.
- Each receiver converts RS-232 inputs to 5V TTL/CMOS levels with a typical threshold of 1.3V and hysteresis of 0.5V.
- Outputs are protected against shorts to ground.
- Supports data rates up to 250 kbit/s.
Applications
- Battery-powered systems.
- Terminals and modems.
- Computers and other serial communication devices.
- Any system requiring RS-232 communication with robust ESD protection.
Q & A
- What is the operating voltage range of the MAX232EIDR?
The MAX232EIDR operates from a supply voltage of 4.5V to 5.5V.
- What is the maximum data rate supported by the MAX232EIDR?
The MAX232EIDR supports data rates up to 250 kbit/s.
- How many drivers and receivers does the MAX232EIDR have?
The MAX232EIDR has two drivers and two receivers.
- What kind of ESD protection does the MAX232EIDR offer?
The MAX232EIDR offers ±15kV HBM and ±8kV/±15kV IEC61000-4-2 contact and air-gap discharge protection.
- What is the typical supply current of the MAX232EIDR?
The typical supply current of the MAX232EIDR is 10 mA.
- What is the package type of the MAX232EIDR?
The MAX232EIDR is packaged in a 16-SOIC.
- Is the MAX232EIDR RoHS compliant?
Yes, the MAX232EIDR is RoHS compliant.
- What is the operating temperature range of the MAX232EIDR?
The operating temperature range of the MAX232EIDR is -40°C to 85°C.
- How does the MAX232EIDR generate the necessary voltage levels for RS-232 communication?
The MAX232EIDR uses a capacitive voltage generator with four external 1µF capacitors to generate the necessary voltage levels from a single 5V supply.
- What kind of logic levels do the receivers convert RS-232 inputs to?
The receivers convert RS-232 inputs to 5V TTL/CMOS levels.
