USB3740B-AI9-TR

Controllers Overview

The USB3740B-AI9-TR is a USB 2.0 compliant High Speed switch integrating robust ESD protection in a compact package. It features flexPWR technology with 30nA active/standby current, suitable for battery-powered applications. The device supports control inputs from 1.8V to 5V and tolerates up to 5.5V on DP/DM lines. Operating temperature range is -40°C to +85°C. It utilizes a 10-pin QFN package (1.6mm x 2.1mm x 0.55mm height, 0.5mm pitch). Electrical specifications include an on-resistance of 2 ohms typical, bandwidth of 1GHz, and 8kV HBM ESD rating.

Controllers Feature Summary

• High Speed USB Mux for multiplexing USB lanes between different functions
• Integrated USB Port ESD Protection (DP/DM) rated at 8kV HBM
• flexPWR Technology providing extremely low power design ideal for battery powered applications
• Control inputs accommodate 1.8V to 5V inputs

Controllers Applications

• Multiplexing USB lanes between different functions
• Switching the USB connector between two different functions
• Battery powered applications requiring low standby current

Controllers Procurement Notes

Verify the specific ordering suffix 'AI9' corresponds to the 10-pin QFN package dimensions of 1.6mm x 2.1mm x 0.55mm height with a 0.5mm pitch as defined in the Product Identification System. Confirm the 'TR' suffix indicates Tape and Reel packaging with a reel size of 3,000 units. Ensure compatibility with the -40°C to +85°C operating temperature range required for the application environment.

Controllers Selection Notes

Select this component when a USB 2.0 High Speed switch with integrated ESD protection is needed to save board space and reduce bill of materials cost by eliminating external protection devices. Consider the 1.6mm x 2.1mm QFN package if the 0.5mm pitch layout is preferred over the 0.4mm pitch option. Verify that the 30nA standby current meets the strict power consumption requirements of the target portable or battery-operated system.

Controllers Part Context

The USB3740B is part of Microchip's family of high-speed USB switches designed for mobile and portable applications. It replaces discrete switch and ESD protection components, consolidating functionality into a single ultra-thin package. The AI9 variant specifically denotes the larger 10-pin QFN footprint compared to the AI2 version, offering flexibility in PCB layout constraints while maintaining identical electrical performance characteristics.

Controllers Replacement Considerations

The USB3740B-AI2-TR serves as a direct functional substitute using the smaller 1.3mm x 1.8mm QFN package with 0.4mm pitch. Both variants share identical electrical specifications and pinout configurations relative to their respective package footprints. Designers must ensure the PCB land pattern matches the selected package dimensions when swapping between AI2 and AI9 versions.

Controllers FAQ

What is the maximum input voltage tolerance for the DP and DM pins?

The DP and DM pins can tolerate up to 5.5V.

How does the USB3740B handle ESD events without external components?

It provides integrated ESD protection rated at 8kV HBM, eliminating the need for external ESD protection devices.

What are the control signal requirements for switching states?

The switch is controlled by OE_N and S digital inputs. OE_N is active low, and S selects between Input 1 or Input 2. When OE_N is high, the device enters Standby mode with both paths disconnected.