MAX221CUE+

Overview

The MAX221CUE+ is a single transmit/receive RS-232 transceiver powered by a +5V supply. It operates within a voltage range of +4.5V to +5.5V and features an ultra-low 1µA supply current in shutdown mode. The device guarantees a maximum data rate of 250kbps with propagation delays of 0.15µs for the receiver. It utilizes internal charge pumps requiring four 0.1µF capacitors to generate ±9V outputs. The component is housed in a 16-pin TSSOP package and supports an operating temperature range from 0°C to +70°C.

Feature Summary

• AutoShutdown technology reduces power consumption by disabling the transmitter when no valid signal is detected
• Integrated dual charge pump eliminates the need for external negative voltage supplies
• INVALID output pin indicates active communication link status

Applications

• Maintenance and diagnostic ports
• Industrial systems
• Telecommunications equipment
• Set-top boxes

Procurement Notes

Verify the specific suffix 'C' confirms the commercial temperature range (0°C to +70°C) and 'UE+' denotes the 16-pin TSSOP package with lead-free compliance. Confirm RoHS status directly with the manufacturer documentation as ordering suffixes define physical and environmental attributes rather than functional changes.

Selection Notes

Select this component for applications requiring minimal board space due to the compact TSSOP footprint. Ensure the system design accommodates the required four external 0.1µF capacitors for the internal charge pumps. Verify that the 250kbps data rate meets the interface requirements, as higher speeds are not supported.

Part Context

This device belongs to the MAX220–MAX249 family of +5V-powered RS-232 drivers and receivers. It serves as a low-power alternative to standard transceivers by incorporating automatic shutdown capabilities. The MAX221E variant offers extended temperature ranges and enhanced ESD protection compared to the MAX221C series.

Replacement Considerations

The MAX221EEUE+ provides equivalent functionality with extended temperature ratings (-40°C to +85°C) and enhanced ±15kV ESD protection.