Texas Instruments TSB43AB23PGE

Overview

TSB43AB23PGE from Texas Instruments is a single-chip 1394a-2000 OHCI-compliant PHY/link-layer controller integrating PCI interface, three 1394 cable ports, and full IEEE 1394-1995/1394a-2000 protocol support. It operates at 33 MHz PCI clock, supports S100/S200/S400 data rates (100/200/400 Mbit/s), delivers up to 132 MB/s burst throughput, and implements hardware DV/MPEG timestamping for isochronous streams - used in digital video capture cards, camcorder docking stations, and professional audio interfaces.

For engineers reviewing the TSB43AB23PGE datasheet, TSB43AB23PGE pinout, TSB43AB23PGE application, or TSB43AB23PGE equivalent, key selection criteria include PCI bus master bursting capability, triple-port PHY arbitration logic, OHCI register mapping compliance, 24.576 MHz crystal reference requirement, and integrated power-down modes (D0–D3) with <2 ms wake latency from ultralow-power sleep.

Technical Context

The TSB43AB23PGE implements a tightly coupled PHY+LLC architecture where the physical layer handles differential TPBIAS-biased cable signaling (TPA/TPB pairs), line-state monitoring, and clock recovery, while the link-layer controller provides memory-mapped OHCI registers, multiple isochronous transmit/receive contexts, and SBP-2-optimized write posting buffers. Its internal PLL generates 393.216 MHz from a 24.576 MHz crystal, then derives 49.152 MHz for LLC synchronization and encoded strobe/data transmission at S100/S200/S400 rates.

PCI interface compliance includes full configuration space access (Vendor ID = 0x104C, Device ID = 0x8023), Command/Status register control, power management capability pointer (PMCAP), and D0–D3 state support per PC 2001 Design Guide. The device uses nonprefetchable memory-mapped I/O for OHCI registers and supports cacheline burst transfers, deep FIFO buffering, and hardware-accelerated CIP header stripping for received DV streams per IEC 61883-1.

Key Specifications

Pinout & Package

TSB43AB23PGE is housed in a 128-pin LQFP package (PGE suffix), measuring 14 mm × 14 mm × 1.4 mm, with 0.4 mm pitch and exposed thermal pad. Pin assignments follow JEDEC MO-220 standard and are validated per TI's SLLS450A datasheet Figure 2–2 and Table 2–2 (PGE Package Signals Sorted by Terminal Number).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1394 host controller applications.

Compared with TSB43AB23PGE, TSB43AB22PGE reduces port count and BOM cost but sacrifices topology flexibility, while VT6306-LE offers integrated bridging at the expense of OHCI software compatibility and DV-specific hardware acceleration - making TSB43AB23PGE the optimal choice for driver-standardized, multi-peripheral FireWire host designs requiring real-time video support.

Availability

TSB43AB23PGE is available at Aetrix Electronics and suitable for digital video capture cards, camcorder docking stations, professional audio interfaces, and industrial machine vision controllers requiring stable component supply, long-term lifecycle support, and verified 1394a interoperability.

Supply support for TSB43AB23PGE 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 leader specializing in analog, embedded processing, and connectivity solutions, with decades of leadership in interface ICs and industrial-grade mixed-signal design.

The TSB43AB23PGE belongs to TI's 1394 Host Controller Solutions product line, engineered specifically for PCI-based FireWire host implementations requiring full OHCI compliance, triple-port PHY integration, and hardware-accelerated isochronous streaming for digital video and audio applications.

FAQ

What is the primary function of the TSB43AB23PGE in a FireWire host system?

The TSB43AB23PGE serves as a fully integrated 1394a-2000 OHCI-compliant host controller, combining PCI interface logic, link-layer controller (LLC), and triple-port physical layer (PHY) in one chip. It manages bus enumeration, isochronous bandwidth allocation, cycle timer synchronization, and hardware-accelerated DV/MPEG timestamping - enabling direct connection of FireWire peripherals to PCI-based systems without external transceivers or glue logic. The TSB43AB23PGE is essential for building standards-compliant FireWire host adapters.

Does the TSB43AB23PGE require an external crystal, and what are the timing requirements?

Yes, the TSB43AB23PGE requires a 24.576 MHz fundamental-mode crystal connected to XI/XO pins, as specified in Section 8.2 of the SLLS450A datasheet. This crystal drives an internal PLL that generates the 393.216 MHz reference and 49.152 MHz system clock. Load capacitance must be 18 pF (±2 pF), and layout must follow TI's recommended crystal trace routing (Figure 8–5). An external 24.576 MHz clock may substitute the crystal, but jitter must remain below ±100 ps RMS to ensure reliable S400 operation. The TSB43AB23PGE will not function without this precise reference.

How does the TSB43AB23PGE handle power management for battery-operated devices?

The TSB43AB23PGE supports PCI D0–D3 power states per the PCI Bus Power Management Interface Specification 1.1 and Intel Mobile Power Guideline 2000. In D2/D3 states, it automatically enters ultralow-power sleep mode when all three ports are inactive (disconnected, disabled, or suspended), disabling internal clocks and reference circuits while retaining TPBIAS detection capability. Wake latency is under 2 ms after setting bit 19 (LPS) in the Host Controller Control Register (OHCI offset 50h/54h). This enables extended battery life in portable FireWire docks and capture devices - a core feature validated in IEEE 1394a-2000 power-down compliance testing.

What are the key differences between the TSB43AB23PGE and the TSB43AB22PGE?

The TSB43AB23PGE integrates three independent 1394 cable ports with separate TPBIAS outputs, while the TSB43AB22PGE provides only one port. Both share identical OHCI register mapping, PCI interface timing, and DV/MPEG timestamping capabilities. However, the TSB43AB23PGE supports daisy-chain topologies and concurrent multi-peripheral operation - critical for video editing workstations and docking stations. The TSB43AB22PGE lacks TPBIAS1/TPBIAS2 pins and associated port signal groups (TPA1/TPB1, TPA2/TPB2), making it unsuitable for applications requiring more than one physical connection. The TSB43AB23PGE is the only option for true multi-port FireWire host functionality.

Can the TSB43AB23PGE be used with standard OHCI drivers in Linux or Windows?

Yes, the TSB43AB23PGE is fully compliant with the 1394 Open Host Controller Interface Specification Release 1.1 and implements memory-mapped, nonprefetchable OHCI registers at standard PCI BAR offsets. It is supported out-of-the-box by Linux kernel modules (firewire-ohci) and Windows drivers (1394bus.sys) without modification. Vendor ID 0x104C and Device ID 0x8023 are recognized by both stacks. TI provides reference BIOS initialization code and register-level documentation (SLLS450A) to ensure seamless integration - confirming that TSB43AB23PGE delivers true plug-and-play OHCI compatibility across major OS platforms.