MAX3232CAE+T

Overview

The MAX3232CAE+T is a low-power, true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single 3.0V to 5.5V supply and features an internal dual charge pump requiring only four 0.1µF external capacitors. The device contains two drivers and two receivers, supporting data rates up to 235kbps with guaranteed ±5.0V output levels under worst-case loads. It provides bus-pin ESD protection exceeding ±15kV per the human-body model. The component is housed in a 16-pin SSOP package and is rated for operation within a temperature range of 0°C to +70°C.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Compatible with industry-standard MAX232 pinout and functionality
• Provides high ESD protection on RS-232 bus pins

Applications

• Battery-powered equipment
• Hand-held devices
• Peripherals
• Datacom equipment

Procurement Notes

Verify the specific suffix 'CAE' corresponds to the required 16-pin SSOP package and the commercial 0°C to +70°C temperature grade. Confirm that the '+T' designation indicates tape-and-reel packaging if reel quantity is required for assembly. Ensure the lead-free status aligns with environmental compliance requirements for the target market.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 standards using a single low-voltage supply. It serves as a direct drop-in replacement for the legacy MAX232 in designs requiring reduced power consumption or lower voltage operation. Verify that the maximum data rate requirement does not exceed 235kbps, as higher speeds require alternative models like the MAX3237.

Part Context

This part belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. The MAX3232 variant specifically offers two drivers and two receivers, distinguishing it from the single-channel MAX3222 and the multi-channel MAX3237/MAX3241. It maintains functional compatibility with older +5V-only transceivers while enabling operation from modern 3.3V systems.

Replacement Considerations

MAX3232CSE+T (Narrow SOIC)

FAQ

Does the MAX3232CAE+T include a shutdown mode?

No, the standard MAX3232 does not feature a shutdown control pin. Shutdown functionality is available in related family members such as the MAX3222 and MAX3237.

What is the minimum supply voltage for proper RS-232 operation?

The device operates from a single supply ranging from 3.0V to 5.5V. While transmitter outputs may meet EIA/TIA-562 levels at voltages as low as 2.7V, the guaranteed operating range starts at 3.0V.