Texas Instruments TSB82AA2GGW

Overview

TSB82AA2GGW from Texas Instruments is a discrete IEEE 1394b OHCI-Lynx link-layer controller IC that bridges 33-MHz PCI (32-/64-bit) and 1394b physical layer devices. It supports serial data rates up to 800 Mbits/s (S800), features 5K asynchronous + 2K isochronous transmit FIFOs and 2K+2K receive FIFOs, operates from a single 3.3-V supply with internal 1.8-V core, and implements D0–D3 power states with PME support - enabling high-throughput, low-latency digital video/audio transfer in PC-based peripherals.

For engineers reviewing the TSB82AA2GGW datasheet, TSB82AA2GGW pinout, TSB82AA2GGW application, or TSB82AA2GGW equivalent, key selection criteria include S800-capable 1394b link-layer compliance, deep dual-mode FIFO buffering for sustained isochronous payloads, PCI power management (PCI 2.2/PMI 1.1), TI's MicroStar BGA-176 package footprint, and hardware-accelerated CIP timestamp handling for DV/MPEG streams.

Technical Context

The TSB82AA2GGW implements a full OHCI-compliant memory-mapped register interface per IEEE 1394a–2000 and draft 1394b, with non-prefetchable BARs and standard PCI configuration space. It supports both 32-bit and 64-bit PCI transfers at 33 MHz, delivering up to 264 MB/s (64-bit) or 132 MB/s (32-bit) peak throughput to system memory.

Its link-layer logic includes out-of-order pipelining for asynchronous transmit requests, physical write posting for up to three outstanding transactions, and hardware-assisted isochronous dual-buffer mode with TI extension register A80h for DV timestamp insertion and CIP header stripping - all optimized for SBP-2, IEC 61883-1, and real-time AV streaming.

Key Specifications

Pinout & Package

TSB82AA2GGW is housed in a 176-ball MicroStar BGA (package code GGW), measuring 15 mm × 15 mm with 1.0-mm ball pitch and RoHS-compliant SNPB finish (MSL Level-3). The package supports automated optical inspection and fine-pitch PCB assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1394b link-layer controller applications.

Compared with TSB82AA2PGE and TSB82AA2ZGW, the TSB82AA2GGW offers legacy-compatible SNPB solder finish and MSL-3 reliability for high-volume PC motherboard integration - making it optimal for OEMs prioritizing mature process stability and broad BIOS/driver support over halogen-free or hand-solderable packaging.

Availability

TSB82AA2GGW is available at Aetrix Electronics and suitable for digital video capture systems, RAID storage controllers, professional audio interfaces, and medical imaging data links requiring stable component supply, long-term lifecycle assurance, and TI-qualified industrial-grade sourcing.

Supply support for TSB82AA2GGW 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, designing analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The TSB82AA2GGW belongs to TI's 1394 OHCI-Lynx product line - engineered specifically for high-throughput, low-power IEEE 1394b link-layer bridging in PC and peripheral applications demanding S800 performance and robust power management.

FAQ

What is the primary function of the TSB82AA2GGW in a system architecture?

The TSB82AA2GGW serves as a discrete IEEE 1394b OHCI-compliant link-layer controller, acting as the dedicated bridge between a 33-MHz PCI bus (32- or 64-bit) and a 1394b physical-layer device such as the TSB81BA3. It handles packet assembly/disassembly, isochronous scheduling, DMA arbitration, and OHCI register mapping - offloading 1394 protocol processing from the host CPU and enabling direct memory access for high-bandwidth streaming applications like digital video capture and RAID storage.

Does the TSB82AA2GGW support S800 (800 Mbits/s) operation, and what PHY compatibility is required?

Yes, the TSB82AA2GGW fully supports IEEE 1394b S800 operation at 786.432 Mbits/s. It requires pairing with a compatible 1394b PHY capable of S800 signaling - such as the TSB81BA3 - connected via the 8-bit parallel PHY_DATA[7:0] interface. The device automatically negotiates speed and ensures link-layer compliance with draft 1394b, including backward compatibility with S100/S200/S400 modes.

How does the TSB82AA2GGW manage power in low-activity states?

The TSB82AA2GGW implements full PCI Power Management Interface Specification compliance, supporting D0 (active), D1/D2 (intermediate sleep), and D3hot/cold (deep sleep) states with PME wake capability. Its internal 3.3-V-to-1.8-V regulator dynamically scales core voltage, and hardware autonomously gates clocks during idle periods - achieving sub-100 µA D3cold current while maintaining register context and fast wake latency for responsive system resumption.

What is the role of the MFUNC1 pin on the TSB82AA2GGW, and how is it configured?

The MFUNC1 pin on the TSB82AA2GGW is a multifunction terminal configurable via strap pins or software registers. It can be assigned as CYCLEIN/CYCLEOUT for precise external cycle timer synchronization - critical for DV/MPEG timestamp alignment - or repurposed as general-purpose I/O. Configuration occurs at power-up via GPIO strapping or runtime through OHCI register writes, enabling flexible timing integration without external logic.

Is the TSB82AA2GGW pin-compatible with other variants in the TSB82AA2 family?

Yes, the TSB82AA2GGW shares identical pin functionality and signal definitions with other TSB82AA2 variants (e.g., TSB82AA2PGE, TSB82AA2ZGW), though mechanical package differs: GGW uses 176-ball BGA, while PGE uses 144-pin LQFP. Signal mapping, register layout, power sequencing, and timing specifications are fully consistent across all variants - allowing direct substitution where board layout and thermal constraints permit.