MAX3233ECPP

Overview

The MAX3233ECPP is a dual RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single 3V to 3.6V power supply and supports full-duplex communication at data rates up to 250kbps. The device integrates charge pumps to generate the necessary voltages for RS-232 signaling, eliminating the need for external capacitors in some configurations, though typically four are required. It features a receiver hysteresis of 500 mV to improve noise immunity. The component is housed in a 20-pin Plastic Dual In-Line Package (PDIP) with a width of 0.300 inches (7.62mm). It is designed for through-hole mounting and operates within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Integrates dual drivers and dual receivers for complete RS-232 communication channels.
• Includes internal charge pump circuitry to support operation from a single low-voltage supply.
• Provides enhanced receiver input noise immunity through built-in hysteresis.
• Supports standard EIA/TIA-232 protocol specifications for serial data transmission.

Applications

• Industrial control systems requiring robust serial communication interfaces.
• Portable battery-powered equipment utilizing low-voltage logic levels.
• Modem and fax machine interface circuits.
• Point-of-sale terminals and barcode scanners.

Procurement Notes

Verify the specific suffix 'CPP' against the manufacturer's current datasheet to confirm package dimensions and pinout compatibility. Ensure the voltage supply range aligns with the 3V to 3.6V specification, as exceeding this limit may damage the device. Check for RoHS compliance status if environmental regulations apply to the end product. Confirm availability through authorized distributors, as older PDIP variants may have limited stock or be subject to obsolescence notices.

Selection Notes

Select this component when a through-hole DIP package is required for prototyping or high-reliability manual assembly. Compare against surface-mount variants like the ECWP if board space is constrained. Ensure the system voltage does not exceed 3.6V, as higher voltage versions require different part numbers. Verify that the 250kbps data rate meets the application's throughput requirements compared to faster transceivers.

Part Context

This part belongs to the MAX3233 family of dual RS-232 transceivers. It shares functional similarities with the MAX3232 but includes additional control pins for shutdown functionality. The 'E' grade indicates extended temperature capabilities relative to commercial grades, though this specific variant is rated for 0°C to 70°C. It is part of Maxim Integrated's legacy line of low-power interface ICs now managed by Analog Devices.

Replacement Considerations

Direct substitutes include other MAX3233 variants with different packages such as MAX3233ECWP (SOIC-20) or MAX3233ECPE (TSSOP-20), provided pinouts match. Cross-family replacements like the MAX3232 may require schematic adjustments due to missing shutdown pins. Always verify electrical parameters and physical footprint before substitution.