MAX232AESE

Overview

The MAX232AESE is a dual driver/receiver RS-232 transceiver designed for EIA/TIA-232E and V.28/V.24 interfaces. It operates on a single +5V supply, utilizing an internal charge pump to generate ±10V levels without external bipolar supplies. The device features two drivers and two receivers supporting full-duplex communication at data rates up to 200 kbps. Electrical specifications include a typical propagation delay of 3.5 µs for transmitters and 1 µs for receivers. It functions within a supply voltage range of 4.5V to 5.5V with a maximum operating current of 10 mA. The component is housed in a 16-pin SO-Narrow package and supports industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Integrates dual charge-pump circuitry to convert a single +5V supply into the required ±10V voltages for RS-232 signaling.
• Provides bidirectional logic level translation between TTL/CMOS inputs and RS-232 output standards.
• Supports full-duplex data transmission through independent driver and receiver channels.

Applications

• Interface translation between microcontrollers and RS-232 serial ports
• Multidrop RS-232 network connections
• Portable diagnostics equipment

Procurement Notes

Verify that the ordering suffix 'ESE' corresponds to the specific 16-pin Narrow SOIC package variant. Confirm compliance with RoHS directives as indicated by the '+' designation. Ensure the procurement channel sources components from Analog Devices or Maxim Integrated to guarantee authenticity and adherence to the specified electrical characteristics.

Selection Notes

Select this component when designing systems requiring standard RS-232 communication without access to negative voltage rails. The integrated charge pump simplifies PCB layout by eliminating the need for external voltage inversion circuits. Verify that the 200 kbps data rate meets the application requirements and that the 16-pin narrow footprint fits the available board space constraints.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The MAX232A variant specifically offers improved performance over the original MAX232, including higher data rates and lower power consumption. The 'E' suffix denotes the extended industrial temperature range capability.

Replacement Considerations

Public confirmed substitute part numbers: MAX232AESE+T (tape and reel version), MAX232AEWE (wide SOIC package).

FAQ

Does the MAX232AESE require external capacitors for operation?

Yes, the datasheet specifies the use of four external capacitors (C1-C4) to support the internal charge pump circuitry for generating the necessary ±10V levels.

What is the input voltage tolerance for the receiver pins?

The receiver inputs (R1IN, R2IN) can withstand input voltages up to ±30V without damage.