MAX3301EETJ+

Overview

The MAX3301EETJ+ is a fully integrated USB On-the-Go (OTG) transceiver and charge pump housed in a 32-pin TQFN package. It supports full-speed (12Mbps) and low-speed (1.5Mbps) data rates compliant with USB 2.0 specifications. The device operates on a VCC supply of +3V to +4.5V and interfaces with logic levels ranging from +1.65V to +3.6V via an internal level shifter. It integrates a VBUS charge pump capable of sourcing over 8mA, a linear regulator for internal circuitry, and an I2C-compatible serial interface. Built-in comparators monitor VBUS voltage states, while the ID_IN pin detects device role. The component provides ±15kV ESD protection on critical terminals and functions within an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrates USB OTG transceiver, VBUS charge pump, and linear regulator for dual-role mobile device connectivity
• Supports Session Request Protocol (SRP) and Host Negotiation Protocol (HNP) for dynamic host/peripheral switching
• Features internal switchable pullup/pulldown resistors and built-in VBUS/ID comparators for automated role detection
• Includes I2C-compatible serial interface with command registers for flexible system control and status monitoring

Applications

• Mobile phones requiring direct peripheral connection without a host PC
• PDAs and digital cameras interfacing with external storage or printers
• Embedded host systems connecting to USB peripherals like keyboards or hard drives
• MP3 players enabling direct communication with other USB devices

Procurement Notes

Verify the specific suffix ETJ corresponds to the 32-pin TQFN package configuration before ordering. Confirm that the lead-free designation (+) meets environmental compliance requirements for the target assembly process. Ensure the I2C address settings align with the system's bus architecture to prevent conflicts. Validate that the power supply voltages remain within the specified operational limits during all operating modes.

Selection Notes

Select this component when designing mobile devices that require true USB On-the-Go functionality without an external host controller. It is suitable for applications needing integrated VBUS signaling and charge pumping capabilities. Consider the 32-pin TQFN package if board space allows for larger footprints compared to UCSP options. Ensure the system logic voltage supports the required 1.65V to 3.6V input range for proper interface compatibility.

Part Context

This part belongs to the MAX3301E/MAX3302E family of USB OTG transceivers. While the MAX3302E powers up in an operational state, the MAX3301E variant defaults to shutdown mode, requiring explicit initialization via the I2C interface. Both share identical electrical characteristics and pinouts but differ in their default power-up states and I2C register addressing schemes for special-function registers.

Replacement Considerations

The MAX3302EETJ+ serves as a functional alternative within the same family, differing primarily in its power-up state and I2C address mapping. Verify that the target application can accommodate the operational startup behavior of the replacement part. Ensure that any software drivers are updated to handle the specific register configurations and interrupt sources unique to the substitute component.