MAX221CAE

Overview

The MAX221CAE is a single RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates at a fixed +5V supply voltage and supports data rates up to 250 kb/s. The device integrates one driver and one receiver in full duplex mode. It features an auto-shutdown function that reduces power consumption during idle periods. The component is housed in a 16-pin SSOP package and is designed for surface mount installation. It functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrates a single driver and receiver for full-duplex RS-232 communication
• Includes auto-shutdown circuitry to minimize power usage when no signal activity is detected
• Provides ESD protection rated at 15 kV on all RS-232 pins

Applications

• Portable battery-powered equipment requiring low standby current
• Modems and fax machines utilizing RS-232 interfaces
• Point-of-sale (POS) terminals and handheld data collection devices

Procurement Notes

Verify the specific suffix 'CAE' against official manufacturer documentation to confirm the exact temperature grade and packaging configuration. Ensure compatibility with existing board layouts regarding the SSOP-16 footprint. Confirm RoHS compliance status through the latest datasheet revision before finalizing procurement plans.

Selection Notes

Select this component when a single-channel RS-232 interface is required with minimal external capacitance. The fixed +5V operation simplifies power design compared to dual-supply alternatives. Consider the commercial temperature range limits for environmental suitability. Verify that the 250 kb/s speed meets the application's baud rate requirements.

Part Context

This part belongs to the MAX221 series of single RS-232 transceivers. It shares functional similarities with other Maxim integrated RS-232 solutions but is distinguished by its specific pinout and auto-shutdown implementation. The series targets applications needing reduced component count and lower power consumption than traditional multi-capacitor RS-232 drivers.

Replacement Considerations

Consult official cross-reference tools for parametrically similar parts. Verify pin-to-pin compatibility and electrical specifications before substitution. Ensure any alternative maintains the same +5V supply requirement and SSOP-16 package dimensions.