AT43USB380E-AU

Overview

The AT43USB380E-AU is a USB 2.0 On-The-Go (OTG) Host/Function Processor manufactured by Atmel, now part of Microchip Technology. It serves as an upgrade to the AT43USB370, integrating on-chip OTG interface support for role determination via ID pin sensing. The device features a variable-width generic host processor interface configurable for 8, 16, or 32-bit data buses, allowing flexible integration with ARM-based systems. It supports full-speed USB connectivity and includes simplified system interfaces that eliminate specific handshaking signals required in previous generations.

Feature Summary

• Integrated USB 2.0 OTG interface supporting Host Negotiation Protocol (HNP) and Session Request Protocol (SRP)
• Configurable 8/16/32-bit generic host processor interface determined by firmware
• On-chip OTG signaling including ID, DISCHARGE, PUMP, and session validity detection
• Up to 16 GPIO pins available when host interface width is reduced from 32 bits

Applications

• USB On-The-Go mobile devices requiring dual host/function capability
• Embedded systems needing direct connection to USB peripherals without external protocol controllers
• Portable electronics utilizing ARM processors for USB host control

Procurement Notes

Verify component authenticity through authorized distributors. Confirm package integrity upon receipt. Ensure ESD-safe handling procedures are followed during storage and assembly. Check for lead-free compliance markings consistent with RoHS standards. Validate part marking against official datasheet specifications.

Selection Notes

Select this component when USB OTG functionality is required alongside a microcontroller. Compare with AT43USB370 if OTG features are unnecessary. Ensure the host processor supports the selected bus width configuration. Verify compatibility with external charge pump requirements for OTG operation.

Part Context

This device belongs to the AT43USB3xx series of USB processors. It succeeds the AT43USB370 by adding OTG capabilities while maintaining functional equivalence as a standard host/function processor. The 'E' suffix typically indicates environmental compliance, and 'AU' denotes the TQFP package type.

Replacement Considerations

The AT43USB370 is a compatible alternative if OTG functionality is not required. Pinout differences exist due to the additional OTG interface signals on the AT43USB380. Firmware migration requires updating APIs to utilize OTG-specific functions.