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Texas Instruments TSB42AA9APZT
- Part No.:
- TSB42AA9APZT
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 100-TQFP
- Datasheet:
-
TSB42AA9APZT.pdf
- Description:
- IC CONTROLLER LINK LAYER 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,567
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Product details
Overview
TSB42AA9APZT from Texas Instruments is a 1394 link-layer controller IC implementing IEEE 1394a/1394-1995 compliance, supporting 100/200/400 Mbps serial bus data rates, automating SBP-2 transport protocol, and bridging 1394 bus to ATA/ATAPI storage devices including HDDs, DVD-RAMs, and CD-R/Ws in external storage enclosures.
For engineers reviewing the TSB42AA9APZT datasheet, TSB42AA9APZT pinout, TSB42AA9APZT application, or TSB42AA9APZT equivalent, key selection criteria include native SBP-2 hardware acceleration, embedded 8052 processor with 16K ROM, dual 576-byte FIFOs, programmable ATA/ATAPI interface supporting Ultra DMA modes 0–4, and 100-pin TQFP packaging for compact external storage designs.
Technical Context
The TSB42AA9APZT integrates a dedicated hardware SBP-2 management agent and command agent, offloading full SBP-2 target controller functions from host software. It performs automated 1394 and SBP-2 header insertion/removal, ATA/ATAPI command translation via firmware-executed logic, and DMA transaction setup without processor intervention.
It features separate address/data buses for external flash PROM/EPROM, enabling in-system firmware updates without sockets; internal parameter RAM stores configuration ROM data for fast access and automatic response to IEEE 1394 configuration read requests; and uses 0.18 µm CMOS technology with embedded RAM and 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 all legacy and high-speed FireWire 1394a operation modes. |
| ATA/ATAPI Support | PIO modes 0–4, DMA modes 0–2, Ultra DMA modes 0–4 - enables full compatibility with ATA/ATAPI storage devices up to Ultra DMA/66. |
| FIFO Size | 576 byte transmit + 576 byte receive control FIFO (128 quadlets each) - buffers SBP-2 command/response traffic with minimal host overhead. |
| Embedded Processor | 8052 core executing firmware from 16K internal ROM - handles ATA/ATAPI translation and SBP-2 state machine without external CPU dependency. |
| Package | 100-pin TQFP (PZT), RoHS-compliant, MSL Level-4 - surface-mount compatible with industrial reflow profiles and space-constrained external storage PCBs. |
Pinout & Package
TSB42AA9APZT is housed in a 100-pin Thin Quad Flatpack (TQFP) package per drawing PZT, with 0.5 mm pitch, 14 mm × 14 mm body, and JEDEC MS-026 compliance. Pinout includes dedicated 1394 PHY interface (TPA/TPB/RPA/RPB), ATA/ATAPI bus signals (AD[15:0], DIOW#, DIOR#, RESET#, etc.), FIFO control (FIFOCLK, FIFOWR#, FIFORD#), and external memory interface (A[15:0], D[7:0], OE#, WE#).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TPA, TPB, RPA, RPB | 1394 Physical Layer Interface | Differential transmit/receive pairs for direct connection to 1394 PHY transceiver (e.g., TSB41AB2). |
| AD[15:0], DIOW#, DIOR#, RESET# | ATA/ATAPI Host Bus Interface | Direct parallel interface to ATA/ATAPI device - supports all PIO, DMA, and Ultra DMA timing modes without glue logic. |
| FIFOCLK, FIFOWR#, FIFORD# | FIFO Control Signals | Enable synchronous data transfer between TSB42AA9APZT and host microcontroller or FPGA for command/response buffering. |
| A[15:0], D[7:0], OE#, WE# | External Flash PROM/EPROM Interface | Allows in-system firmware update and custom feature loading - eliminates need for socketed EPROM during development or field upgrades. |
| SCL, SDA | 2-Wire Serial Configuration Interface | Loads IEEE 1394 configuration ROM from external EEPROM into internal parameter RAM for automatic host enumeration. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware SBP-2 Transport Engine | Full offload of SBP-2 management and command agents - eliminates host CPU involvement in SCSI command translation and status reporting. |
| Automated Header Handling | On-the-fly 1394 and SBP-2 header insertion/removal - reduces software stack complexity and latency in storage target implementations. |
| Programmable ATA/ATAPI Interface | Configurable timing and mode support across PIO 0–4, DMA 0–2, Ultra DMA 0–4 - accommodates diverse legacy and modern storage devices. |
| Internal Parameter RAM | Fast-access storage for configuration ROM and SBP-2 parameters - enables immediate response to host configuration reads without external memory access delay. |
| External Flash Interface | Dedicated address/data bus with OE#/WE# - supports in-field firmware updates and application-specific feature extensions without hardware redesign. |
Applications
| External Hard Disk Enclosures | DVD/CD-RW External Drives |
|---|---|
Use Scenario: Compact USB-to-FireWire bridgeless enclosure housing 2.5" or 3.5" SATA-to-ATA adapter and HDD. IC Role / Device Role / Timing Role: Native 1394-to-ATA bridge acting as SBP-2 target controller, managing all FireWire packetization and ATA command execution. Use Value: Eliminates need for external microcontroller; reduces BOM count and PCB area while maintaining full Ultra DMA/66 throughput over FireWire 400. |
Use Scenario: Portable FireWire-connected DVD-ROM or CD-R/W drive with front-panel controls and status LEDs. IC Role / Device Role / Timing Role: Link-layer controller handling SBP-2 command translation, media change detection, and ATAPI packet command routing. Use Value: Enables plug-and-play enumeration on Mac OS X and Windows with native driver support; supports ATAPI command set including eject, tray open/close, and media status polling. |
| Magneto-Optical (MO) Storage Systems | ORB Drive Docking Stations |
Use Scenario: Rack-mounted MO library subsystem with multiple drives sharing a single FireWire port via daisy chain. IC Role / Device Role / Timing Role: 1394 link-layer endpoint providing IEEE 1394a arbitration, isochronous resource allocation, and SBP-2 target addressing for multi-drive topology. Use Value: Supports concurrent access to multiple MO cartridges using FireWire's guaranteed bandwidth and cycle-time synchronization - critical for archival backup workflows. |
Use Scenario: Desktop docking station supporting hot-swappable ORB drives with power management and activity indication. IC Role / Device Role / Timing Role: SBP-2 target controller managing ORB-specific ATAPI commands (e.g., format, verify, defect scan) and drive spin-up sequencing. Use Value: Delivers deterministic command latency and error recovery per ORB specification - ensures reliable sector-level formatting and long-term data integrity verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 1394 link-layer controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSB42AA9APZTR | Same die, tape-and-reel packaging (1000-unit reel), identical electrical and thermal specs. | No functional difference; optimized for automated SMT assembly rather than sample evaluation. | Select TSB42AA9APZTR for volume production; TSB42AA9APZT is tray-packaged (90-unit) for prototyping and small-batch validation. |
| TSB42AA9APZTG4 | Identical functionality and pinout; Green (RoHS & no Sb/Br) finish with same MSL Level-4 rating. | No operational distinction; differs only in material composition per TI's eco-plan definition. | Choose TSB42AA9APZTG4 when full bromine/antimony-free compliance is mandated by end-equipment environmental policy. |
Compared with TSB42AA9APZT, the TSB42AA9APZTR offers identical performance in tape-and-reel form for high-volume manufacturing, while TSB42AA9APZTG4 provides identical functionality with enhanced halogen-free materials - both require no design changes but differ in packaging logistics and material compliance scope.
Availability
TSB42AA9APZT is available at Aetrix Electronics and suitable for external hard disk enclosures, DVD/CD-RW drives, magneto-optical storage systems, and ORB docking stations requiring stable component supply, long-lifecycle support, and RoHS-compliant 1394 link-layer integration.
Supply support for TSB42AA9APZT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer applications.
The TSB42AA9APZT belongs to TI's StorageLynx family of 1394 link-layer controllers, designed specifically to enable cost-effective, high-integration FireWire-based external storage products with native SBP-2 target functionality.
FAQ
What is the primary function of the TSB42AA9APZT in a FireWire storage system?
The TSB42AA9APZT serves as a native 1394 link-layer controller that bridges the FireWire (IEEE 1394) bus to ATA/ATAPI storage devices. It implements hardware-accelerated SBP-2 transport protocol, translates SBP-2 commands to ATA/ATAPI instructions, manages DMA transactions, and handles 1394 packet framing - all without requiring an external microcontroller. This makes the TSB42AA9APZT ideal for self-contained external storage enclosures where minimal BOM and deterministic latency are essential.
Does the TSB42AA9APZT support Ultra DMA modes, and which ones?
Yes, the TSB42AA9APZT supports Ultra DMA modes 0 through 4 (UDMA/16 to UDMA/66). Its programmable ATA/ATAPI interface meets the timing requirements for all five modes, enabling full throughput compatibility with high-performance 2.5" and 3.5" ATA hard drives used in FireWire external enclosures. This capability is confirmed in the official TSB42AA9A datasheet (SLLA219) and applies directly to the TSB42AA9APZT variant.
Can the TSB42AA9APZT operate without external firmware memory?
Yes, the TSB42AA9APZT can operate fully using its internal 16K ROM containing the base firmware for SBP-2 and ATA/ATAPI translation. External flash PROM/EPROM is optional and used only for custom firmware extensions, in-system updates, or prototyping flexibility. The device boots and enumerates correctly on the 1394 bus using internal ROM alone - no external memory is required for standard SBP-2 target operation.
What package type and lead finish does the TSB42AA9APZT use?
The TSB42AA9APZT uses a 100-pin TQFP package (drawing PZT) with 0.5 mm pitch, 14 mm × 14 mm body, and JEDEC MS-026 compliance. Its lead finish is CU NIPDAU (copper with nickel-palladium-gold), classified as Green (RoHS & no Sb/Br), and rated MSL Level-4 (260°C peak, 72-hour floor life). This matches TI's official packaging information for the TSB42AA9APZT orderable device.
Is the TSB42AA9APZT pin-compatible with other variants like TSB42AA9APZTR?
Yes, the TSB42AA9APZT is pin-compatible and functionally identical to TSB42AA9APZTR and TSB42AA9APZTG4. All share the same die, pinout, electrical characteristics, and thermal profile. The differences are strictly in packaging format (tray vs. tape-and-reel) and material compliance labeling (Green vs. standard RoHS); no PCB layout or schematic changes are needed when substituting among these variants.
TSB42AA9APZT 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:
- -
TSB42AA9APZT FAQ
1.How can I place an order for TSB42AA9APZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSB42AA9APZT 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 TSB42AA9APZT reliable?
The price and inventory of TSB42AA9APZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSB42AA9APZT is usually 5 days.
3.What payment methods are accepted for TSB42AA9APZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSB42AA9APZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSB42AA9APZT?
TSB42AA9APZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSB42AA9APZT 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 TSB42AA9APZT?
For technical support, including TSB42AA9APZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSB42AA9APZT requirements.
6.How does Aetrix verify that TSB42AA9APZT is sourced from the original manufacturer or authorized distributors?
All TSB42AA9APZT 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 TSB42AA9APZT meets industry standards.
7.What is the process for return or replacement of TSB42AA9APZT?
All TSB42AA9APZT units undergo pre-shipment inspection (PSI). If there is an issue with TSB42AA9APZT, 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 TSB42AA9APZT part is unused and in its original packaging.
Return procedure for TSB42AA9APZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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