Overview
The MAX232D, produced by Texas Instruments, is a dual driver/receiver integrated circuit designed to facilitate communication between TTL/CMOS logic levels and RS-232 serial communication standards. This device is part of the MAX232 family and is known for its ability to operate from a single 5V power supply, utilizing a capacitive voltage generator to produce the necessary voltage levels for RS-232 communication.
The MAX232D is widely used in various applications requiring serial communication, including battery-powered systems, terminals, modems, and computers. It is notable for its low power consumption, high data rate capability, and robust ESD protection.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 4.5 to 5.5 | V |
| Operating Temperature Range | 0 to 70 | °C |
| Number of Drivers/Receivers | 2/2 | |
| Data Rate | Up to 120 | kbit/s |
| Input Levels | ±30 | V |
| Supply Current | 8 | mA (typical) |
| ESD Protection | ±2000V Human-body model (A114-A) | |
| Package Type | 16-SOIC | |
| Mounting Type | Surface Mount | |
| Receiver Hysteresis | 500 | mV |
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 data rates up to 120 kbit/s.
- Includes two drivers and two receivers.
- Accepts input levels up to ±30V.
- Low supply current: 8mA typical.
- ESD protection exceeds JESD 22 – 2000V Human-body model (A114-A).
- Upgrade with improved ESD (15kV HBM) and 0.1µF charge-pump capacitors available with the MAX202 device.
- Each receiver converts TIA/EIA-232-F inputs to 5V TTL/CMOS levels with a typical threshold of 1.3 V and hysteresis of 0.5 V.
Applications
- TIA/EIA-232-F compliant systems.
- Battery-powered systems.
- Terminals and terminal equipment.
- Modems and other serial communication devices.
- Computers and computer peripherals requiring RS-232 interfaces.
Q & A
- What is the MAX232D used for?
The MAX232D is used to convert TTL/CMOS logic levels to RS-232 serial communication standards and vice versa.
- What is the operating voltage range of the MAX232D?
The MAX232D operates from a supply voltage of 4.5V to 5.5V.
- How many drivers and receivers does the MAX232D have?
The MAX232D has two drivers and two receivers.
- What is the maximum data rate supported by the MAX232D?
The MAX232D supports data rates up to 120 kbit/s.
- What kind of ESD protection does the MAX232D offer?
The MAX232D offers ESD protection exceeding JESD 22 – 2000V Human-body model (A114-A).
- What type of package is the MAX232D available in?
The MAX232D is available in a 16-SOIC package.
- What is the typical supply current of the MAX232D?
The typical supply current of the MAX232D is 8mA.
- Can the MAX232D operate in battery-powered systems?
Yes, the MAX232D is suitable for battery-powered systems due to its low power consumption.
- What are the input voltage levels that the MAX232D can accept?
The MAX232D can accept input levels up to ±30V.
- Is the MAX232D RoHS compliant?
Yes, the MAX232D is RoHS compliant.
