USB2244I-AEZG-06

Specialized Overview

The USB2244I-AEZG-06 is a USB 2.0 compliant, Hi-Speed bulk-only mass storage class peripheral controller designed for reading and writing to SD and MMC flash media. It operates within an industrial temperature range of -40°C to +85°C. The device integrates a single-chip solution with a 36-pin QFN (6x6 mm) package. It features an internal 8051 8-bit microprocessor running at 60 MHz with 64 KB ROM and 14 KB RAM. The controller supports Secure Digital 2.0 (HS-SD, SDHC) and MultiMediaCard 4.2 specifications. It utilizes a single external 3.3 V supply source, with internal regulators providing 1.8 V core voltage.

Specialized Feature Summary

• Hardware-controlled data flow architecture for self-mapped media and pipelined hardware support for non-self-mapped media access.
• Integrated on-board 24 MHz crystal driver circuit with optional external clock input capability.
• Built-in internal card power FET featuring fold-back short circuit protection for media power management.
• Supports customizable vendor-specific data and optimized low latency interrupt handling via software features.

Specialized Applications

• Flash media card readers and writers
• Desktop and mobile PCs
• Printers
• Consumer A/V and media players/viewers

Specialized Procurement Notes

Verify the specific ordering suffix '-06' against official Microchip documentation to confirm its exact meaning regarding tape-and-reel packaging or specific configuration options. Ensure the industrial temperature grade 'I' matches the operational environment requirements. Confirm RoHS compliance status as stated in the datasheet. Validate that the QFN-36 package dimensions align with the PCB footprint design. Check for any required external EEPROM for custom firmware configurations if default values are insufficient.

Specialized Selection Notes

Select this component when designing systems requiring dedicated SD/MMC interface support without xD-Picture Card compatibility. The industrial temperature rating makes it suitable for harsh environments compared to commercial variants. Consider the integrated 8051 processor for firmware customization needs. Evaluate the pin count and package size for space-constrained applications. Ensure the host system supports USB 2.0 High-Speed bulk-only transport protocols for optimal performance.

Specialized Part Context

This part belongs to the USB224x family of ultra-fast USB 2.0 multi-format flash media controllers. Unlike the USB2240/41 which support combo sockets including xD cards, the USB2244 variant is specifically optimized for SD and MMC media types. The 'I' suffix denotes the industrial temperature range extension. The 'AEZG' indicates the specific QFN-36 package type and RoHS compliance. This model represents a specialized subset within the broader USB224x series focused on standard memory card interfaces.

Specialized Replacement Considerations

USB2244-AEZG-06 is the commercial temperature version of this component. USB2241I-AEZG-06 supports SD and Memory Stick formats but lacks MMC support. USB2240I-AEZG-06 supports xD, SD, and Memory Stick formats with multiplexed interfaces. Verify pin compatibility and firmware differences before substitution.

Specialized FAQ

Does the USB2244I support xD-Picture Card media?

No, the USB2244 and USB2244I models do not support xD-Picture Card media. They are designed specifically for Secure Digital (SD) and MultiMediaCard (MMC) formats.

What is the function of the CRD_PWR pin?

The CRD_PWR pin serves as the card power drive output, capable of supplying 3.3 V at either 100 mA or 200 mA depending on the configuration.

How is the device clock generated?

The device includes an on-board 24 MHz crystal driver circuit. It can use an external 24 MHz crystal connected to XTAL1 and XTAL2 pins, or accept an external 24 MHz clock signal directly at the XTAL1 (CLKIN) pin.