TSB42AA9APZT

Controllers Overview

The TSB42AA9APZT is a StorageLynx IEEE 1394 link-layer controller designed to bridge the 1394 bus with ATA/ATAPI storage devices. It supports serial bus data rates of 100, 200, and 400 Mbps and complies with IEEE P1394a and IEEE Std 1394-1995 standards. The device features a 100-pin TQFP package and includes a 16K internal ROM program memory. It provides a 576-byte transmit control FIFO and a 576-byte receive control FIFO, supporting PIO modes 0–4, DMA modes 0–2, and Ultra DMA modes 0–4. An external flash PROM/EPROM interface allows for firmware updates.

Controllers Feature Summary

• Automates SBP-2 target controller functions by implementing management and command agents in hardware without processor assistance.
• Translates SBP-2 protocol commands to ATA/ATAPI commands using an embedded 8052 processor executing firmware.
• Includes a 2-wire serial bus interface to load configuration ROM information from a serial EEPROM into internal parameter RAM.
• Supports automated response to configuration ROM quadlet and block read requests from the system host.

Controllers Applications

• External hard disk drives (HDDs)
• CD-ROM, CD-R/W, DVD-ROM, and DVD-RAM drives
• ZIP drives and magneto-optical (MO) drives

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct packaging quantity and moisture sensitivity level ratings. Confirm that the component status remains active for new designs before finalizing procurement plans. Cross-reference the lead finish specifications to match soldering process requirements.

Controllers Selection Notes

Select this controller when designing high-volume PC applications requiring native bridging between IEEE 1394 buses and ATA/ATAPI storage interfaces. Ensure the design accommodates the 100-pin TQFP package constraints and utilizes the external flash interface if custom firmware functionality or in-system reprogrammability is required.

Controllers Part Context

This component belongs to the StorageLynx family of IEEE 1394 link-layer controllers. It is specifically engineered for data storage applications that support the Serial Bus Protocol 2 (SBP-2) transaction layer as a target device. The device integrates hardware-based data handling to offload processing tasks typically managed by a central processor.

Controllers Replacement Considerations

TSB42AA9APZTG4 is a verified equivalent offering identical functionality with RoHS-compliant manufacturing specifications.