MAX3245CAI-T

Overview

The MAX3245CAI-T is a low-power RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features three drivers and five receivers, supporting data rates up to 1Mbps. The device operates from a single 3.0V to 5.5V supply with a typical quiescent current of 1mA. It includes AutoShutdown Plus functionality for power management in portable applications. The component is housed in a 28-pin SSOP package and is rated for an operating temperature range of 0°C to 70°C.

Feature Summary

• AutoShutdown Plus circuitry automatically places the receiver in a low-power state when no valid signal is present on the RS-232 line.
• Integrated charge pump generates required voltage swings for RS-232 communication without external components.
• Designed for high noise immunity with Schmitt-trigger inputs on receivers.

Applications

• Portable computers and notebook systems requiring low standby power.
• Battery-powered industrial instruments and handheld terminals.
• Modems and communication equipment utilizing RS-232 interfaces.

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration against official distributor catalogs. Confirm the 'CAI' designation corresponds to the commercial temperature grade (0°C to 70°C) and SSOP-28 package variant. Ensure compatibility with existing PCB footprints for the 28-SSOP form factor before procurement.

Selection Notes

Select this component when a multi-driver, multi-receiver RS-232 interface is needed with minimal active power consumption. The AutoShutdown feature makes it suitable for battery-operated devices where line idle states must trigger sleep modes. Verify that the 1Mbps speed meets system requirements and that the 3V to 5.5V supply range aligns with the target platform's voltage rails.

Part Context

This part belongs to the MAX3245E family of RS-232 transceivers known for low power and high performance. The CAI variant specifies the commercial temperature range and plastic shrink small-outline package. It serves as a bridge between microprocessor logic levels and RS-232 serial communication standards in embedded systems.

Replacement Considerations

The MAX3245ECWI+T is a verified equivalent offering identical electrical specifications in a wider SOIC-28 package. Designers must verify pin-to-pin compatibility and ensure the alternative package fits the mechanical constraints of the enclosure.