MAX233EPP

Overview

The MAX233EPP is a fully integrated, dual-channel RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply and utilizes an internal charge pump to generate the required ±10V levels for EIA/TIA-232E compliance without external components. The device features two drivers and two receivers in a 20-pin PDIP package. Electrical specifications include a data rate of 120kbps, a receiver input hysteresis of 500mV, and operation within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump circuitry eliminates the need for bipolar ±12V supplies or external capacitors.
• Enables single-supply operation from a standard +5V source.
• Provides full-duplex communication with two independent drivers and receivers.

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial ports
• Multidrop RS-232 network connections
• Portable diagnostic equipment requiring compact form factors

Procurement Notes

Verify the specific suffix against the manufacturer's current product status documentation. Suffixes may indicate variations in temperature ratings, lead finish, or RoHS compliance. Confirm that the ordering information matches the exact functional requirements and package dimensions specified in the official datasheet before procurement.

Selection Notes

Select this component when board space is critical due to the absence of external charge-pump capacitors. Ensure the application requires only two channels, as other family members offer different driver/receiver counts. Verify that the single +5V supply voltage aligns with the system power architecture and that the 120kbps data rate meets the communication speed requirements.

Part Context

The MAX233EPP belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. This family is designed to replace traditional dual-supply transceivers by integrating the voltage conversion circuitry directly onto the silicon die. The 'E' designation typically denotes the extended industrial temperature range variant within this product line.

Replacement Considerations

Public confirmed substitute part numbers: MAX233EPP+G36.