MAX221EAE+T

Overview

The MAX221EAE+T is a +5V-powered, single transmit/receive RS-232 and V.28 communications interface featuring AutoShutdown technology. It operates within a -40°C to +85°C temperature range in a 16-pin SSOP package. The device achieves a low 1µA supply current during shutdown and guarantees a 250kbps data rate. Electrical characteristics include a typical propagation delay of 0.15µs, an output voltage swing of ±5V to ±9V, and input thresholds of ±2.7V when the transmitter is enabled. It requires four 0.1µF external capacitors for its internal dual charge-pump voltage converter.

Feature Summary

• AutoShutdown technology reduces power consumption by entering a low-power mode when no valid RS-232 signal is detected
• Integrated dual charge-pump voltage converter generates positive and negative supplies from a single +5V source
• INVALID pin indicates the presence of active RS-232 signals at the receiver input

Applications

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

Procurement Notes

Verify the component matches the specific Analog Devices/Maxim Integrated part number MAX221EAE+T. Confirm the package type is 16-pin SSOP and the operating temperature range covers -40°C to +85°C. Ensure the datasheet revision aligns with the required specifications before procurement.

Selection Notes

Select this component for applications requiring a single-channel RS-232 transceiver with minimal standby power consumption. It is suitable for systems where BIOS or OS modifications are not permitted for power management. Verify that the system can accommodate the required four 0.1µF external capacitors for the charge pumps.

Part Context

The MAX221EAE+T belongs to the MAX221 series of single RS-232 transceivers. The 'E' suffix denotes an extended temperature range of -40°C to +85°C, while 'AE' specifies the 16-pin SSOP package. This variant provides enhanced ESD protection compared to standard versions.

Replacement Considerations

Refer to the MAX221E datasheet for equivalent RS-232 transceivers with enhanced ±15kV ESD protection. Other members of the MAX221 family may offer different package options or thermal ratings.