The MAX3221EETE+T from Maxim Integrated is a high-performance, low-power, single-transmitter, single-receiver RS-232 and V.28 communications interface with an automatic shutdown/wakeup feature and a high data rate capability. Designed for applications that require efficient serial communication, this device is particularly suitable for battery-powered systems such as laptops, PDAs, and other handheld equipment.

Key Features

• Interface Type: RS-232
• Data Rate: Up to 250kbps
• Supply Voltage Range: 3.0V to 5.5V
• Low-Power Shutdown: Yes, with automatic shutdown and wakeup
• Number of Drivers/Receivers: 1/1
• Package Type: 16-TQFN-EP
• Operating Temperature Range: -40°C to +85°C
• ESD Protection: ±15kV Human Body Model

Product Description

The MAX3221EETE+T features a proprietary low-dropout transmitter output stage, enabling true RS-232 performance from a 3.0V to 5.5V supply with a dual charge pump. The charge pump requires only four small 0.1µF capacitors for operation, reducing the necessary board space and component cost.

This device is capable of running at data rates up to 250kbps while maintaining RS-232 output levels. The MAX3221EETE+T includes a shutdown feature that reduces the supply current to just 1µA, making it an ideal choice for power-sensitive applications. The automatic shutdown function occurs when the RS-232 cable is disconnected or when the transmitters of the connected peripherals are off, effectively minimizing power consumption without user intervention.

Additionally, the MAX3221EETE+T is equipped with a receiver that remains active during shutdown, allowing for the monitoring of incoming data for activity. The device also features ESD protection for the RS-232 I/O pins, safeguarding against electrostatic discharges up to ±15kV using the Human Body Model.

With its robust feature set and compact form factor, the MAX3221EETE+T from Maxim Integrated is an excellent choice for designers looking to implement reliable and efficient RS-232 communications in their systems.