Overview
The MAX232EIDWR is a dual RS-232 driver and receiver integrated circuit produced by Texas Instruments. It is designed to meet or exceed the TIA/EIA-232-F and ITU recommendation V.28 standards. This device includes a capacitive voltage generator that allows it to supply RS-232-F compliant voltage levels from a single 5V power supply. The MAX232EIDWR is particularly useful in applications requiring reliable and efficient serial communication interfaces.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 4.5V to 5.5V | V |
| Operating Temperature Range | -40°C to 85°C | °C |
| Transmission Speed | Up to 250kbit/s | bit/s |
| Number of Drivers | 2 | - |
| Number of Receivers | 2 | - |
| Propagation Time | 500ns | ns |
| Input Levels | ±30V | V |
| Supply Current | 8mA (typical) | mA |
| ESD Protection | ±15kV HBM, ±8kV IEC61000-4-2 Contact Discharge, ±15kV IEC61000-4-2 Air-Gap Discharge | kV |
Key Features
- Meets or exceeds TIA/EIA-232-F and ITU recommendation V.28 standards.
- Operates from a single 5V power supply with 1µF charge-pump capacitors.
- Supports transmission speeds up to 250kbit/s.
- Includes two drivers and two receivers.
- Accepts ±30V input levels.
- Low supply current: 8mA typical.
- ESD protection: ±15kV HBM, ±8kV IEC61000-4-2 Contact Discharge, ±15kV IEC61000-4-2 Air-Gap Discharge.
- Each receiver converts RS-232 inputs to 5V TTL/CMOS levels with a typical threshold of 1.3V and hysteresis of 0.5V.
- Each driver converts TTL/CMOS input levels into TIA/EIA-232-F levels.
Applications
- TIA/EIA-232-F compliant systems.
- Battery-powered systems.
- Terminals and modems.
- Computers and other serial communication devices.
Q & A
- What is the MAX232EIDWR used for?
The MAX232EIDWR is used as a dual RS-232 driver and receiver to convert between TTL/CMOS logic levels and RS-232 voltage levels.
- What are the operating voltage and temperature ranges of the MAX232EIDWR?
The operating voltage range is 4.5V to 5.5V, and the operating temperature range is -40°C to 85°C.
- How many drivers and receivers does the MAX232EIDWR have?
The MAX232EIDWR has two drivers and two receivers.
- What is the maximum transmission speed supported by the MAX232EIDWR?
The MAX232EIDWR supports transmission speeds up to 250kbit/s.
- What kind of ESD protection does the MAX232EIDWR offer?
The MAX232EIDWR offers ±15kV HBM, ±8kV IEC61000-4-2 Contact Discharge, and ±15kV IEC61000-4-2 Air-Gap Discharge ESD protection.
- How does the MAX232EIDWR generate the necessary RS-232 voltage levels?
The MAX232EIDWR uses a capacitive voltage generator with four 1µF external capacitors to generate the necessary RS-232 voltage levels from a single 5V supply.
- What are the typical input threshold and hysteresis values for the receivers in the MAX232EIDWR?
The typical input threshold is 1.3V, and the typical hysteresis is 0.5V.
- Can the MAX232EIDWR handle high input voltages?
Yes, the MAX232EIDWR can accept input voltages up to ±30V.
- What is the typical supply current of the MAX232EIDWR?
The typical supply current is 8mA.
- What are some common applications of the MAX232EIDWR?
Common applications include TIA/EIA-232-F compliant systems, battery-powered systems, terminals, modems, and computers.
