MAX3380EEUP+

Overview

The MAX3380EEUP+ is a dual transmitter and dual receiver RS-232 transceiver manufactured by Analog Devices / Maxim Integrated. It operates within a supply voltage range of +2.35V to +5.5V, supporting data rates up to 460kbps. The device features AutoShutdown Plus technology that reduces supply current to 1µA when no signal transitions are detected for 30 seconds. All RS-232 inputs, outputs, and logic pins provide ±15kV ESD protection via the Human Body Model and IEC 1000-4-2 Air-Gap Discharge methods. It utilizes a proprietary low-dropout transmitter output stage and requires only four small capacitors for its dual charge pump. The component is housed in a 20-pin TSSOP package.

Feature Summary

• AutoShutdown Plus feature automatically enters a 1µA shutdown mode after 30 seconds of inactivity on receiver or transmitter inputs.
• Proprietary low-dropout transmitter output stage enables true RS-232 performance from +3.1V to +5.5V and compatible levels down to +2.35V.
• Enhanced electrostatic discharge (ESD) protection on all CMOS and RS-232 inputs and outputs, except INVALID pin.
• Unique VL pin allows interoperation in mixed-logic voltage systems down to +1.65V.

Applications

• Cell Phone Data Lump Cables
• PDA Data Lump Cables
• GPS Receivers
• Digital Cameras

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm temperature range and packaging details. Confirm RoHS compliance status through the datasheet or manufacturer certification. Ensure the procurement channel provides genuine components with traceable manufacturing history to prevent counterfeit parts.

Selection Notes

Select the MAX3380EEUP+ for applications requiring high data rates up to 460kbps and extended operating temperatures from -40°C to +85V. Consider the MAX3381E variant if lower slew rates are needed to minimize noise and EMI. Verify that the system logic supply voltage aligns with the VL pin requirements for proper interface compatibility.

Part Context

The MAX3380E/MAX3381E series are designed as low-power communication interfaces for portable devices. They maximize battery life by reducing current consumption at low battery levels through dynamic output voltage adjustment. The EEUP+ designation indicates an industrial temperature range (-40°C to +85°C) and a 20-pin TSSOP surface-mount package.

Replacement Considerations

The MAX3381EEUP+ is a direct functional substitute within the same family, offering identical pinouts and features but limited to a maximum data rate of 250kbps. Other members of the MAX3380E/MAX3381E series may differ in temperature ranges or packaging options.

FAQ

How does the AutoShutdown Plus feature function?

The AutoShutdown Plus feature monitors receiver and transmitter inputs. If no valid signal transition is detected for 30 seconds, the device shuts down the on-board power supply and drivers, reducing the supply current to 1µA. It wakes up upon detecting a valid edge.

What is the purpose of the VL pin?

The VL pin serves as the logic level supply input, setting the thresholds for transmitter inputs and the voltage levels for receiver and INVALID outputs. This allows the device to interface with mixed-logic voltage systems down to +1.65V.

How does the device handle low supply voltages?

When VCC drops below approximately +3.1V, the transmitter output levels reduce from ±5.5V to ±3.7V. This RS-232-compatible mode reduces supply current requirements while maintaining functionality down to +2.35V.