Overview
The MAX232CEASE+T, produced by Analog Devices Inc./Maxim Integrated, is a dual driver/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, which is widely used for converting TTL/CMOS logic levels to RS-232 levels and vice versa. The MAX232CEASE+T operates from a single 5V power supply and includes a capacitive voltage generator that eliminates the need for a bipolar ±12V supply, making it highly efficient and space-saving.
Key Specifications
| Parameter | Min | Typical | Max | Units |
|---|---|---|---|---|
| Supply Voltage | 4.75 | 5 | 5.25 | V |
| Supply Current | 8 | mA | ||
| RS-232 Input Voltage | -30 | 30 | V | |
| RS-232 Data Rate | 120 | kbit/s | ||
| ESD Protection (HBM) | ±15kV | |||
| ESD Protection (IEC61000-4-2 Contact Discharge) | ±8kV | |||
| ESD Protection (IEC61000-4-2 Air-Gap Discharge) | ±15kV | |||
| TTL/CMOS Output Voltage Low | 0.4 | V | ||
| TTL/CMOS Output Voltage High | 3.5 | V |
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.
- Two drivers and two receivers.
- Accepts ±30V input levels.
- Low supply current: 8mA typical.
- ESD protection exceeds JESD 22 – 2000V Human-body model 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 hysteresis of 0.5V.
- Outputs are protected against shorts to ground.
Applications
- TIA/EIA-232-F compliant systems.
- Battery-powered systems.
- Terminals and modems.
- Computers and other serial communication devices.
Q & A
- What is the primary function of the MAX232CEASE+T?
The MAX232CEASE+T is a dual driver/receiver that converts TTL/CMOS logic levels to RS-232 levels and vice versa.
- What is the operating voltage of the MAX232CEASE+T?
The device operates from a single 5V power supply.
- What is the maximum data rate supported by the MAX232CEASE+T?
The device supports up to 120 kbit/s data rate.
- What kind of ESD protection does the MAX232CEASE+T offer?
The device offers ESD protection up to ±15kV HBM, ±8kV IEC61000-4-2 contact discharge, and ±15kV IEC61000-4-2 air-gap discharge.
- How many drivers and receivers does the MAX232CEASE+T have?
The device has two drivers and two receivers.
- What is the typical supply current of the MAX232CEASE+T?
The typical supply current is 8mA.
- What are the input voltage levels accepted by the MAX232CEASE+T?
The device can accept ±30V input levels.
- How does the MAX232CEASE+T handle TTL/CMOS output voltages?
The device converts RS-232 inputs to 5V TTL/CMOS levels with a typical threshold of 1.3V and hysteresis of 0.5V.
- What are some common applications of the MAX232CEASE+T?
Common applications include TIA/EIA-232-F compliant systems, battery-powered systems, terminals, modems, and computers.
- How is the MAX232CEASE+T protected against shorts?
The outputs are protected against shorts to ground.
