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Texas Instruments TSB42AA9APZTR
- Part No.:
- TSB42AA9APZTR
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 100-TQFP
- Datasheet:
-
TSB42AA9APZTR.pdf
- Description:
- IC CONTROLLER LINK LAYER 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
TSB42AA9APZTR from Texas Instruments is a 1394 link-layer controller implementing IEEE 1394a/1394-1995 compliance, supporting 100/200/400 Mbps serial bus data rates, automated SBP-2 transport protocol engine, and native ATA/ATAPI command translation for external storage targets including HDDs, DVD-RAMs, and MO drives.
For engineers reviewing the TSB42AA9APZTR datasheet, TSB42AA9APZTR pinout, TSB42AA9APZTR application, or TSB42AA9APZTR equivalent, key selection considerations include SBP-2 target automation, integrated 8052 processor with 16K ROM, dual 576-byte FIFOs, 100-pin TQFP package, and external Flash PROM interface for firmware updates during prototyping.
Technical Context
The TSB42AA9APZTR implements hardware-accelerated SBP-2 management and command agents, eliminating host CPU involvement in DMA transaction setup between ATA/ATAPI devices and the 1394 bus. It embeds an 8052 processor executing firmware from internal ROM or external Flash to handle protocol translation and configuration ROM handling.
It features separate address/data buses for external Flash/EPROM (no latches required), a 2-wire serial interface for loading IEEE 1394 configuration ROM from EEPROM into internal parameter RAM, and automated 1394/SBP-2 header insertion/removal - all built on 0.18 µm CMOS with embedded RAM/ROM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Compliance | IEEE P1394a and IEEE Std 1394-1995 compliant - ensures interoperability with standard FireWire hosts and peripherals. |
| Serial Bus Data Rates | 100 / 200 / 400 Mbps - supports full backward compatibility and high-speed data streaming for storage targets. |
| ATA/ATAPI Support | PIO modes 0–4, DMA modes 0–2, Ultra DMA modes 0–4 - enables direct connection to legacy and modern storage interfaces without glue logic. |
| FIFO Depth | 576 byte transmit + 576 byte receive control FIFO (128 quadlets each) - buffers SBP-2 command/response traffic and reduces host interrupt load. |
| Internal Memory | 16K ROM program memory + internal parameter RAM - stores boot firmware and accelerates configuration ROM access for fast bus enumeration. |
| Process Technology | 0.18 µm CMOS with embedded RAM and ROM - delivers low-power operation and integration density suitable for compact external storage enclosures. |
| Package | 100-pin TQFP (PZT drawing), RoHS-compliant, MSL Level-4 - surface-mountable with standardized reflow profile for volume manufacturing. |
Pinout & Package
TSB42AA9APZTR uses a space-saving 100-pin Thin Quad Flat Package (TQFP) per drawing PZT, with 0.5 mm pitch, 14.0 × 14.0 mm body size, and JEDEC MS-026 compliance. Pin 1 located in Quadrant 2 (Q2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | 1394 PHY clock input | Accepts 49.152 MHz crystal or oscillator signal to synchronize 1394 physical layer timing. |
| RESET# | Active-low asynchronous reset | Hard-resets internal state machines, FIFOs, and processor core; requires ≥100 ns pulse width. |
| AS#, DS#, RD#, WR# | ATA/ATAPI bus control signals | Directly drive standard ATA timing sequences for PIO/DMA transfers without external logic. |
| SDA, SCL | 2-wire serial interface | Loads IEEE 1394 configuration ROM from external EEPROM into internal parameter RAM at power-up. |
| A[15:0], D[15:0] | ATA/ATAPI address/data bus | Provides native 16-bit parallel interface to ATA/ATAPI devices; no address latching required. |
| FLASH_A[15:0], FLASH_D[7:0] | External Flash PROM interface | Enables in-system firmware updates and custom functionality deployment without socketed EPROMs. |
Key Features
| Feature | Design Value |
|---|---|
| Automated SBP-2 transport protocol engine | Hardware-implemented management and command agents eliminate host CPU overhead for SBP-2 target operations. |
| Embedded 8052 processor with 16K ROM | Executes firmware for ATA/ATAPI command translation and configuration ROM handling without external microcontroller. |
| Dual 576-byte control FIFOs | Decouples 1394 packet processing from ATA/ATAPI burst transfers, enabling sustained 400 Mbps throughput. |
| Separate Flash address/data busses | Removes need for external latches or glue logic when connecting external PROM/EPROM for firmware development. |
| IEEE 1394 configuration ROM auto-response | Internal parameter RAM enables immediate response to quadlet/block read requests during bus enumeration. |
Applications
| External Hard Disk Enclosures | DVD/CD-RW Drive Adapters |
|---|---|
|
Use Scenario: Integrating 3.5" or 2.5" SATA/IDE HDDs into FireWire-enabled external enclosures for desktop backup and media transfer. IC Role / Device Role / Timing Role: Acts as native SBP-2 target controller bridging ATA/ATAPI commands to IEEE 1394 packets with hardware-accelerated DMA. Use Value: Eliminates need for external microcontroller and firmware development; supports Ultra DMA Mode 4 for up to 66 MB/s sustained throughput. |
Use Scenario: Converting legacy ATAPI CD-RW or DVD-ROM drives into plug-and-play FireWire peripherals for Mac OS X and Windows systems. IC Role / Device Role / Timing Role: Translates SBP-2 SCSI command set to ATAPI packet commands while managing media change detection and buffer underrun protection. Use Value: Enables full compliance with Apple's FireWire storage class driver and Microsoft's SBP-2 stack without custom INF files or drivers. |
| Magneto-Optical (MO) Storage Systems | ORB Drive Docking Stations |
|
Use Scenario: Enabling high-reliability MO drives used in archival and medical imaging systems to connect via FireWire for portable data migration. IC Role / Device Role / Timing Role: Provides deterministic latency control for MO seek and write-verify cycles using programmable ATA timing registers. Use Value: Supports PIO Mode 4 and Ultra DMA Mode 2 - critical for maintaining data integrity during long-duration MO write operations. |
Use Scenario: Supporting Iomega ORB removable disk drives in shared workstation environments requiring hot-swap FireWire connectivity. IC Role / Device Role / Timing Role: Manages ORB-specific ATAPI command extensions (e.g., cartridge presence detection, spin-up sequencing) via embedded firmware. Use Value: Delivers seamless media change notification and automatic re-enumeration after ORB cartridge swaps - no host driver reload required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 1394-to-ATA bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSB42AA9APZT | Same die and functionality; differs only in tape-and-reel quantity (90 pcs vs. 1000 pcs) and packaging moisture sensitivity level (MSL-4 vs. MSL-4, same peak temp) | Identical electrical and thermal behavior; suited for prototype builds or low-volume production where smaller reels are preferred | Select TSB42AA9APZT for engineering validation or pilot runs; TSB42AA9APZTR is optimized for high-volume manufacturing with larger reel count. |
| TSB42AA9APZTRG4 | Functionally identical; G4 suffix denotes TI's green RoHS-compliant finish (CU NIPDAU) with same MSL rating and package drawing | No operational difference; G4 variant meets stricter halogen-free requirements (Br/Sb < 0.1% wt) for regulated industrial markets | Choose TSB42AA9APZTRG4 when compliance with halogen-free standards (e.g., IEC 61249-2-21) is mandatory for end-product certification. |
Compared with TSB42AA9APZT and TSB42AA9APZTRG4, the TSB42AA9APZTR offers identical core functionality and pinout but is specifically configured for cost-optimized, high-volume production with 1000-unit reels and standard green RoHS finish - making it the default choice for OEM storage enclosure manufacturers.
Availability
TSB42AA9APZTR is available at Aetrix Electronics and suitable for external hard disk enclosures, DVD/CD-RW adapters, magneto-optical archival systems, and ORB docking stations requiring stable component supply and long-term manufacturability.
Supply support for TSB42AA9APZTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog, embedded processing, and connectivity solutions across industrial, automotive, and consumer markets.
The TSB42AA9A family was designed specifically as a single-chip 1394 link-layer controller for ATA/ATAPI storage targets - targeting high-volume PC peripheral applications requiring SBP-2 compliance and minimal system-level firmware overhead.
FAQ
What is the primary function of the TSB42AA9APZTR in a FireWire storage system?
The TSB42AA9APZTR serves as a native 1394-to-ATA/ATAPI bridge, implementing IEEE 1394a and SBP-2 protocol layers in hardware to enable external storage devices like HDDs and DVD drives to operate as plug-and-play FireWire peripherals. Its embedded 8052 processor executes firmware that translates SBP-2 SCSI commands into ATA/ATAPI operations, and the TSB42AA9APZTR handles DMA setup, header insertion/removal, and configuration ROM responses autonomously - eliminating host CPU involvement in data transfers.
Does the TSB42AA9APZTR require an external microcontroller to operate?
No, the TSB42AA9APZTR does not require an external microcontroller. It integrates an 8052-compatible processor core, 16K internal ROM for boot firmware, and internal parameter RAM for configuration data. All SBP-2 target functions - including command agent execution, ATA timing control, and 1394 packet assembly - are handled on-die. External firmware updates can be performed via its dedicated Flash PROM interface, but runtime operation is fully self-contained within the TSB42AA9APZTR.
What ATA/ATAPI transfer modes does the TSB42AA9APZTR support?
The TSB42AA9APZTR supports programmed I/O (PIO) Modes 0–4, direct memory access (DMA) Modes 0–2, and Ultra DMA Modes 0–4. This covers legacy IDE devices up to UDMA-66 (66 MB/s), ensuring compatibility with a wide range of HDDs, CD-RWs, DVD-ROMs, and MO drives. Timing parameters for each mode are programmable via internal registers, allowing fine-tuned optimization for specific device characteristics without hardware changes.
Can the TSB42AA9APZTR be used with modern operating systems like macOS and Windows 10?
Yes, the TSB42AA9APZTR is fully compatible with macOS (including legacy FireWire stacks) and Windows 10 via standard SBP-2 class drivers. Its IEEE 1394a compliance and automated configuration ROM response ensure proper enumeration as a mass-storage target. The TSB42AA9APZTR's adherence to SBP-2 specification T10 Project 1155D guarantees interoperability with host-side initiators, and no vendor-specific drivers are needed for basic read/write functionality.
What is the purpose of the 2-wire serial interface (SDA/SCL) on the TSB42AA9APZTR?
The 2-wire serial interface (SDA/SCL) on the TSB42AA9APZTR loads IEEE 1394 configuration ROM data from an external EEPROM into the device's internal parameter RAM at power-up. This enables fast, deterministic responses to configuration ROM read requests from the FireWire host during bus enumeration - a requirement of IEEE Std 1394-1995. The TSB42AA9APZTR uses this RAM to store vendor ID, model ID, and unit directories, ensuring reliable plug-and-play behavior without external processor intervention.
TSB42AA9APZTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-TQFP
- Programmable:
- Not Verified
- Protocol:
- IEEE 1394
- Function:
- Link Layer Controller
- Interface:
- Parallel
- Standards:
- IEEE 1394-1995, 1394a-2000
- Voltage - Supply:
- -
- Current - Supply:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 100-TQFP (14x14)
- Grade:
- -
- Qualification:
- -
TSB42AA9APZTR FAQ
1.How can I place an order for TSB42AA9APZTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TSB42AA9APZTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TSB42AA9APZTR reliable?
The price and inventory of TSB42AA9APZTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSB42AA9APZTR is usually 5 days.
3.What payment methods are accepted for TSB42AA9APZTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSB42AA9APZTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSB42AA9APZTR?
TSB42AA9APZTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSB42AA9APZTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TSB42AA9APZTR?
For technical support, including TSB42AA9APZTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSB42AA9APZTR requirements.
6.How does Aetrix verify that TSB42AA9APZTR is sourced from the original manufacturer or authorized distributors?
All TSB42AA9APZTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TSB42AA9APZTR meets industry standards.
7.What is the process for return or replacement of TSB42AA9APZTR?
All TSB42AA9APZTR units undergo pre-shipment inspection (PSI). If there is an issue with TSB42AA9APZTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TSB42AA9APZTR part is unused and in its original packaging.
Return procedure for TSB42AA9APZTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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