Overview
The MAX232ECDR is a dual RS-232 driver and receiver integrated circuit manufactured by Texas Instruments. This device is designed to convert TTL/CMOS logic levels to RS-232 levels and vice versa, making it an essential component for interfacing microcontrollers or other TTL/CMOS devices with RS-232 compatible systems such as computers and modems.
The MAX232ECDR operates from a single 5V power supply and uses a capacitive voltage generator to produce the necessary RS-232 voltage levels. It includes two drivers and two receivers, each capable of handling RS-232 signals. The device also features robust ESD protection, ensuring reliability in various operating environments.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage) | 4.5 | 5 | 5.5 | V |
| VIH (High-Level Input Voltage) | - | - | 2 | V |
| VIL (Low-Level Input Voltage) | 0.8 | - | - | V |
| Input Voltage (Receiver) | -30 | - | 30 | V |
| Operating Temperature | -40 | - | 85 | °C |
| ESD Protection (HBM) | - | - | ±15kV | - |
| ESD Protection (IEC61000-4-2 Contact Discharge) | - | - | ±8kV | - |
| ESD Protection (IEC61000-4-2 Air-Gap Discharge) | - | - | ±15kV | - |
| Supply Current | - | 8 | - | mA |
| Data Rate | - | - | 250kbit/s | - |
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 bidirectional communication.
- 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.
- Accepts ±30V input levels and converts them to 5V TTL/CMOS levels.
- Shorted and open fail-safe receivers.
- Available in 16-pin PDIP, SO, and SOIC packages.
Applications
- TIA/RS-232-F compliant systems.
- Battery-powered systems.
- Terminals and modems.
- Computers and peripherals.
- Interfacing microcontrollers with RS-232 compatible devices.
- RS-232 cables and adapters.
Q & A
- What is the MAX232ECDR used for?
The MAX232ECDR is used for converting TTL/CMOS logic levels to RS-232 levels and vice versa, enabling communication between microcontrollers or other TTL/CMOS devices and RS-232 compatible systems.
- What is the operating voltage of the MAX232ECDR?
The MAX232ECDR operates from a single 5V power supply.
- How many drivers and receivers does the MAX232ECDR have?
The MAX232ECDR includes two drivers and two receivers.
- What is the data rate supported by the MAX232ECDR?
The MAX232ECDR supports data rates up to 250kbit/s.
- What kind of ESD protection does the MAX232ECDR offer?
The MAX232ECDR offers ±15kV Human-body model (HBM), ±8kV IEC61000-4-2 contact discharge, and ±15kV IEC61000-4-2 air-gap discharge ESD protection.
- What are the typical supply current requirements of the MAX232ECDR?
The typical supply current is 8mA.
- What are the input voltage levels that the MAX232ECDR can handle?
The MAX232ECDR can handle input voltage levels up to ±30V.
- In what packages is the MAX232ECDR available?
The MAX232ECDR is available in 16-pin PDIP, SO, and SOIC packages.
- Is the MAX232ECDR recommended for new designs?
No, the MAX232ECDR is not recommended for new designs as it has been announced for discontinuation by Texas Instruments.
- How does the MAX232ECDR generate RS-232 voltage levels from a 5V supply?
The MAX232ECDR uses a capacitive voltage generator (charge pump) that requires four external capacitors to generate the necessary RS-232 voltage levels from a single 5V supply.
