MAX3245CAI+

Overview

The MAX3245CAI+ is a single-supply RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates within a voltage range of +3.0V to +5.5V and supports data rates up to 1Mbps. The device integrates three drivers and five receivers, featuring AutoShutdown Plus technology that reduces supply current to 1µA during inactivity. It utilizes a dual charge pump requiring only four small capacitors for operation. The component is housed in a 28-pin SSOP package and is designed for industrial temperature ranges.

Feature Summary

• AutoShutdown Plus functionality automatically enters low-power shutdown mode when the RS-232 cable is disconnected or peripheral transmitters are inactive for over 30 seconds, waking upon valid signal transitions.
• MegaBaud operation guarantees 1Mbps data rates for high-speed applications such as ISDN modem communication.
• Proprietary low-dropout transmitter output stage enables true RS-232 performance from a single +3.0V to +5.5V supply using a dual charge pump.
• Includes an INVALID output that indicates receiver input conditions independent of shutdown states.

Applications

• Notebook, Subnotebook, and Palmtop Computers
• Cellular Phones
• Battery-Powered Equipment
• Handheld Equipment
• Peripherals

Procurement Notes

Verify the specific ordering suffix 'CAI+' against official manufacturer documentation to confirm lead-free/RoHS compliance and package type. Confirm availability status with authorized distributors as stock levels fluctuate. Ensure the selected variant matches the required operating temperature range and pin configuration for your PCB layout.

Selection Notes

Select the MAX3245CAI+ for applications requiring 1Mbps data rates and low power consumption. Compare with MAX3244 variants if 250kbps is sufficient, as they share similar features but differ in guaranteed speed. Consider package constraints; this model uses SSOP-28. Verify capacitor requirements based on the specific VCC voltage used in the design.

Part Context

The MAX3245 belongs to the MAX3224–MAX3227/MAX3244/MAX3245 family of RS-232 transceivers. This series is characterized by its 1µA supply current capability and AutoShutdown Plus feature. The MAX3245 specifically distinguishes itself within the group by supporting 1Mbps data rates, unlike the MAX3244 which is limited to 250kbps.

Replacement Considerations

Public confirmed substitute part numbers include MAX3245EAI+T and MAX3245EEAI+T. These variants offer similar electrical characteristics and functionality within the same product family.