MAX3227EAE+T

Overview

The MAX3227EAE+T is a single-driver, single-receiver RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +3.0V to +5.5V supply and achieves a typical supply current of 1µA through AutoShutdown Plus technology. The device guarantees data rates up to 1Mbps with a propagation delay of 0.15µs. It features ±15kV ESD protection on I/O pins and includes logic-level outputs such as READY and INVALID for system status monitoring. The component is housed in a 16-pin SSOP package and supports full-duplex communication.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption when the interface is idle or disconnected.
• Integrated dual charge pump generates required internal voltages using only four small external capacitors.
• Logic-level outputs provide real-time status regarding charge pump regulation and valid signal detection.

Applications

• Notebook, subnotebook, and palmtop computers
• Cellular phones and handheld equipment
• Battery-powered peripherals and printers

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature range. Confirm RoHS compliance status and lead-free designation requirements prior to procurement. Ensure the selected variant matches the intended operating environment constraints.

Selection Notes

Select this component for applications requiring low-power standby modes and high-speed serial communication over short distances. Verify that the external capacitor values align with the specific supply voltage used in the design. Consider the SSOP package dimensions for PCB layout compatibility.

Part Context

This part belongs to the MAX3224–MAX3227 family of RS-232 transceivers designed for battery-powered systems. The MAX3227 specifically provides one driver and one receiver with 1Mbps capability. It shares core features like AutoShutdown Plus and UCSP packaging options with other members of the series.

Replacement Considerations

Compatible alternatives within the same family include the MAX3227EEAE+ (SSOP) and MAX3227ECTE+ (TQFN). Cross-reference pinouts and electrical characteristics carefully before substitution.

FAQ

How does the AutoShutdown Plus feature function?

It automatically shuts down the transmitters and charge pumps when no valid signal transitions are detected on any input for more than 30 seconds, reducing supply current to 1µA.

What is the purpose of the READY output?

The READY output asserts high when the internal charge pumps are regulating and the device is ready to begin transmitting RS-232 signals.

Can unused transmitter inputs be left floating?

No, unused transmitter inputs should be connected to GND or VCC to prevent undefined states.