Overview
The MAX232ECDWRE4, produced by Texas Instruments, is a dual driver and receiver integrated circuit designed to meet or exceed the TIA/EIA-232-F and ITU recommendation V.28 standards. This device is part of the MAX232 family and is specifically enhanced with additional ESD protection. It operates from a single 5V power supply and includes a capacitive voltage generator to supply the necessary voltage levels for RS-232 communication.
The MAX232ECDWRE4 is particularly useful in applications requiring conversion between TTL/CMOS logic levels and RS-232 voltage levels, making it a versatile component for various communication systems.
Key Specifications
| Parameter | Minimum | Typical | Maximum | 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 |
| Receiver Input Voltage | -30 | - | 30 | V |
| Operating Free-Air Temperature | -40 | - | 85 | °C |
| Supply Current (ICC) | - | 8 | 10 | mA |
| Data Rate | - | - | 250 | kbit/s |
| ESD Protection (HBM) | - | - | ±15kV | - |
| ESD Protection (IEC61000-4-2) | - | - | ±8kV (Contact), ±15kV (Air-Gap) | - |
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.
- Includes two drivers and two receivers.
- Accepts ±30V input levels.
- Low supply current: 8mA typical.
- ESD protection exceeds JESD 22 – 2000V Human-body model (HBM) and up to ±15kV HBM, ±8kV IEC61000-4-2 contact discharge, and ±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 a typical hysteresis of 0.5V.
- Each driver converts TTL/CMOS input levels into RS-232-F levels.
Applications
- TIA/EIA-232-F compliant systems.
- Battery-powered systems.
- Terminals and terminals equipment.
- Modems.
- Computers and computer peripherals.
Q & A
- What is the primary function of the MAX232ECDWRE4?
The MAX232ECDWRE4 is a dual driver and receiver that converts between TTL/CMOS logic levels and RS-232 voltage levels.
- What is the operating voltage range for the MAX232ECDWRE4?
The device operates from a single 5V power supply with a voltage range of 4.5V to 5.5V.
- What is the maximum data rate supported by the MAX232ECDWRE4?
The MAX232ECDWRE4 supports data rates up to 250 kbit/s.
- What kind of ESD protection does the MAX232ECDWRE4 offer?
The device offers ESD protection exceeding ±15kV HBM, ±8kV IEC61000-4-2 contact discharge, and ±15kV IEC61000-4-2 air-gap discharge.
- What are the typical input and output voltage levels for the receivers?
The receivers convert RS-232 inputs to 5V TTL/CMOS levels with a typical threshold of 1.3V and a typical hysteresis of 0.5V.
- Can the MAX232ECDWRE4 operate in a wide temperature range?
Yes, the device can operate over a temperature range of -40°C to 85°C.
- What is the typical supply current of the MAX232ECDWRE4?
The typical supply current is 8mA.
- What are some common applications for the MAX232ECDWRE4?
Common applications include TIA/EIA-232-F compliant systems, battery-powered systems, terminals, modems, and computers.
- How many drivers and receivers are included in the MAX232ECDWRE4?
The device includes two drivers and two receivers.
- What is the significance of the charge-pump capacitors in the MAX232ECDWRE4?
The charge-pump capacitors (typically 1µF) are used to generate the necessary voltage levels for RS-232 communication from a single 5V supply.
