MAX3245ECTX+T

Overview

The MAX3245ECTX+T is a single-supply 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 on a +3.0V to +5.5V supply with a typical operating current of 1mA. It incorporates AutoShutdown Plus technology, reducing supply current to 1μA during inactivity. ESD protection is rated at ±15kV for air discharge and ±8kV for contact discharge. The component is housed in a 36-pin TQFN package with an exposed pad and supports an industrial temperature range from -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption when the interface is idle or disconnected.
• Integrated dual charge pump generates internal voltage rails without requiring external inductors.
• Enhanced electrostatic discharge protection ensures robustness against high-voltage static events.
• Dedicated INVALID output pin indicates the presence of valid RS-232 signal levels.

Applications

• Notebook, subnotebook, and palmtop computers
• Cellular phones and battery-powered equipment
• Hand-held devices and peripherals such as printers

Procurement Notes

Verify the specific suffix 'TX' confirms the tape-and-reel packaging format required for automated surface-mount assembly. Confirm that the '+T' designation aligns with lead-free and RoHS compliance standards mandated by your procurement specifications. Ensure the ordering information matches the exact 36-TQFN variant to avoid pinout discrepancies.

Selection Notes

Select this component when designing systems requiring three transmit and five receive channels within a compact footprint. The 1Mbps data rate capability makes it suitable for high-speed applications like ISDN modem communication. Verify that the system power budget accommodates the 1mA active current while leveraging the 1μA shutdown mode for extended battery life.

Part Context

This part belongs to the MAX3245E series, which provides enhanced ESD protection and low-power operation compared to legacy RS-232 transceivers. The MAX3245E specifically offers higher data rates than the MAX3244E. The family utilizes Maxim's proprietary charge pump architecture to achieve true RS-232 performance from a single low-voltage supply.

Replacement Considerations

The MAX3244E serves as a functional substitute but guarantees only 250kbps operation instead of 1Mbps. Other members of the MAX3224E/MAX3225E/MAX3226E/MAX3227E/MAX3244E/MAX3245E family share similar electrical characteristics but differ in driver/receiver counts and guaranteed data rates.