Overview
The MAX232NSR is a dual EIA-232 driver/receiver integrated circuit produced by Texas Instruments. It is designed to convert TTL/CMOS logic levels to EIA-232-F (formerly known as RS-232) voltage levels and vice versa, enabling communication between devices that operate at different voltage levels. The MAX232NSR includes a capacitive voltage generator that allows it to operate from a single 5V power supply, making it suitable for a variety of applications including battery-powered systems, terminals, modems, and computers.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 4.5 to 5.5 | V |
| Supply Current | 8 | mA (typical) |
| Data Rate | Up to 120 | kbit/s |
| Input Levels | ±30 | V |
| Driver Slew Rate | 30 | V/μs |
| High-Level Output Voltage (VOH) | 3.5 | V (at IOH = -1 mA) |
| Low-Level Output Voltage (VOL) | 0.4 | V (at IOL = 3.2 mA) |
| ESD Protection | 2000V Human-Body Model (A114-A) | |
| Package Types | SOIC (16), PDIP (16), SOP (16) | |
| Operating Temperature Range | 0°C to 70°C |
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 (A114-A).
- Each receiver converts EIA-232-F 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 EIA-232-F levels.
Applications
- TIA/EIA-232-F interfaces.
- Battery-powered systems.
- Terminals.
- Modems.
- Computers.
Q & A
- What is the MAX232NSR used for?
The MAX232NSR is used to convert TTL/CMOS logic levels to EIA-232-F voltage levels and vice versa, enabling communication between devices that operate at different voltage levels.
- What is the operating voltage range of the MAX232NSR?
The MAX232NSR 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 MAX232NSR?
The MAX232NSR supports data rates up to 120 kbit/s.
- What kind of ESD protection does the MAX232NSR offer?
The MAX232NSR offers ESD protection that exceeds JESD 22 – 2000V Human-body model (A114-A).
- What are the typical supply current and input levels of the MAX232NSR?
The typical supply current is 8mA, and it can accept input levels of ±30V.
- What are the package types available for the MAX232NSR?
The MAX232NSR is available in SOIC (16), PDIP (16), and SOP (16) packages.
- What is the operating temperature range of the MAX232NSR?
The operating temperature range is 0°C to 70°C.
- Does the MAX232NSR meet any specific standards?
Yes, it meets or exceeds TIA/EIA-232-F and ITU recommendation V.28 standards.
- How many drivers and receivers does the MAX232NSR include?
The MAX232NSR includes two drivers and two receivers.
- What is the purpose of the charge-pump capacitors in the MAX232NSR?
The charge-pump capacitors are used to generate the necessary voltage levels for EIA-232-F operation from a single 5V power supply.
