MAX3241ECTJ+

Overview

The MAX3241ECTJ+ is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a +3.0V to +5.5V supply and features three drivers and five receivers. The device guarantees data rates up to 250kbps, with typical propagation delays of 0.15µs. Supply current is typically 1mA in normal operation and drops to 10µA or lower in shutdown mode. ESD protection on I/O pins reaches ±15kV (Human Body Model) and ±8kV (IEC Contact Discharge). It utilizes an internal dual charge pump requiring four 0.1µF external capacitors.

Feature Summary

• Integrated dual charge pump generates required voltage levels using only four small external capacitors.
• Enhanced electrostatic discharge protection on all transmitter outputs and receiver inputs.
• Shutdown mode significantly reduces power consumption while maintaining receiver activity for wake-up capabilities.

Applications

• Notebook, subnotebook, and palmtop computers
• Battery-powered equipment and hand-held devices
• Cell-phone data cables and peripherals

Procurement Notes

Verify the specific suffix 'ECTJ+' against the manufacturer's official documentation to confirm package type and temperature range. Confirm lead-free status and RoHS compliance through the datasheet ordering information section. Ensure compatibility with existing PCB footprints before procurement.

Selection Notes

Select this component when designing serial communication interfaces for portable systems requiring low power consumption. It is suitable for applications needing multiple receiver lines and robust ESD protection without external voltage generation components. Verify that the operating temperature range meets the environmental requirements of the target application.

Part Context

This part belongs to the MAX32xxE family of low-power RS-232 transceivers. These devices are designed to replace traditional higher-voltage interface chips in modern low-voltage digital systems. The MAX3241 variant specifically provides a complete serial port configuration with three drivers and five receivers.

Replacement Considerations

MAX3241EUI+T

FAQ

How does the shutdown mode affect receiver outputs?

In shutdown mode, the transmitters are disabled, but the receivers remain active to allow monitoring of external signals for wake-up purposes.

What external components are required for operation?

The device requires four small 0.1µF external capacitors to support the internal dual charge pump circuitry.

Is the complementary receiver output always active?

Yes, the R_OUTB pins on the MAX3241E are always active regardless of the enable or shutdown states, allowing detection of RS-232 activity even when the main system is powered down.