MAX232AEUE+

Overview

The MAX232AEUE+ is a dual driver/receiver RS-232 transceiver from the MAX220–MAX249 family, designed for EIA/TIA-232E and V.28/V.24 interfaces. It operates on a single +5V supply (4.5V to 5.5V) using an internal charge pump to generate ±10V levels. The device features two drivers and two receivers with full-duplex communication. Key electrical parameters include a data rate of 120kbps, typical propagation delays of 3.5µs (transmitter) and 1µs (receiver), and a supply current of 10mA at no load. It supports TTL/CMOS logic levels and includes receiver input hysteresis of 0.5V. The component is rated for industrial temperatures (-40°C to +85°C) and housed in a 16-pin TSSOP package.

Feature Summary

• Integrates dual charge-pump circuitry to eliminate the need for external bipolar power supplies
• Provides full-duplex communication with independent transmitter and receiver channels
• Features integrated receiver input hysteresis to improve noise immunity
• Supports direct interface between TTL/CMOS logic and RS-232 serial ports

Applications

• Interface translation between microcontrollers and RS-232 peripherals
• Portable diagnostic equipment requiring low-power serial communication
• Multidrop RS-232 network nodes

Procurement Notes

Verify the specific suffix 'UE+' corresponds to the lead-free TSSOP-16 package variant when sourcing. Confirm that the ordering code matches the industrial temperature grade (-40°C to +85°C). Ensure the procurement documentation explicitly references the Analog Devices or Maxim Integrated datasheet for the MAX220-MAX249 family to validate pinout compatibility and electrical specifications against legacy versions.

Selection Notes

Select this component when board space is limited due to its integrated charge pump eliminating external capacitors for voltage inversion. Choose the AE suffix for industrial temperature range requirements over commercial grades. Verify that the required data rate does not exceed 120kbps and that the system can accommodate the standard 0.1µF external capacitors for the charge pump operation as specified in the typical operating circuit.

Part Context

This part belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family offers various configurations including single, dual, quad, and octal channel options. The MAX232 specifically provides two drivers and two receivers, making it suitable for standard point-to-point serial connections. The 'A' designation indicates the industrial temperature range, while 'E' denotes enhanced features like hysteresis.

Replacement Considerations

Direct functional replacements within the same family include MAX232EEUE+ and MAX232AESE+. Cross-family alternatives such as the MAX3232 series offer lower power consumption but may require different capacitor values or supply voltages. Verify pinout compatibility before substituting.