Overview
The MAX232CPE is a dual driver/receiver integrated circuit designed for converting TTL/CMOS logic levels to RS232 logic levels and vice versa. It is manufactured by Maxim Integrated, which is now part of Analog Devices Inc. This IC is particularly useful for interfacing microcontrollers with computers or other devices that use RS232 communication standards.
The MAX232CPE operates from a single +5V supply and includes an integrated charge pump to generate the necessary RS232 voltage levels. This makes it a convenient and efficient solution for various communication applications.
Key Specifications
| Parameter | Description |
|---|---|
| Supply Voltage | +5V (typical), 4.5V to 5.5V range |
| Operating Speed | Up to 120 kbit/s |
| Input Levels | ±30V |
| Supply Current | 8mA (typical) |
| ESD Protection | Exceeds JESD 22 – 2000V Human-body model (A114-A), 15kV HBM for upgraded versions |
| Package Types | 16-pin PDIP, SO, SOIC, SOP |
| Charge Pump Capacitors | 1µF to 22µF (typically 1µF) |
Key Features
- TTL/CMOS to RS232 conversion and vice versa
- Dual drivers and receivers, supporting two conversions simultaneously
- Operates from a single +5V supply with integrated charge pump
- Easy setup and initialization
- Supports up to 120 kbit/s data rate
- ±30V input levels
- Low supply current: 8mA typical
- ESD protection exceeds JESD 22 – 2000V Human-body model
Applications
- Connecting microcontrollers with computers
- TTL/CMOS to RS232 logic conversion
- Used in RS232 cables and adapters
- Battery-powered systems
- Terminals and modems
- Computers and other RS232-compatible devices
Q & A
- What is the primary function of the MAX232CPE IC?
The primary function of the MAX232CPE IC is to convert TTL/CMOS logic levels to RS232 logic levels and vice versa.
- What is the operating supply voltage for the MAX232CPE?
The MAX232CPE operates from a single +5V supply, with a range of 4.5V to 5.5V.
- What is the maximum data rate supported by the MAX232CPE?
The MAX232CPE supports data rates up to 120 kbit/s.
- What type of ESD protection does the MAX232CPE offer?
The MAX232CPE offers ESD protection that exceeds JESD 22 – 2000V Human-body model (A114-A), and up to 15kV HBM for upgraded versions.
- What are the typical charge pump capacitors used with the MAX232CPE?
The typical charge pump capacitors used are 1µF, but they can range from 1µF to 22µF.
- What are the common package types for the MAX232CPE?
The MAX232CPE is available in 16-pin PDIP, SO, SOIC, and SOP packages.
- How does the MAX232CPE generate RS232 voltage levels from a +5V supply?
The MAX232CPE uses an integrated charge pump to generate the necessary RS232 voltage levels from a single +5V supply.
- What are some common applications of the MAX232CPE?
Common applications include connecting microcontrollers with computers, using in RS232 cables and adapters, battery-powered systems, terminals, modems, and computers.
- Can the MAX232CPE support multiple conversions simultaneously?
Yes, the MAX232CPE supports two conversions simultaneously with its dual drivers and receivers.
- What is the typical supply current of the MAX232CPE?
The typical supply current of the MAX232CPE is 8mA.
