Texas Instruments TSB12LV26TPZEP

Overview

TSB12LV26TPZEP from Texas Instruments is a PCI-to-IEEE 1394a host controller IC implementing OHCI-Lynx architecture, supporting 100/200/400 Mbit/s serial bus data rates, compliant with PCI Local Bus Specification Rev 2.2 and IEEE Std 1394-1995/1394a-2000, and used in desktop PCs and digital video capture systems for FireWire interface bridging.

For engineers reviewing the TSB12LV26TPZEP datasheet, TSB12LV26TPZEP pinout, TSB12LV26TPZEP application, or TSB12LV26TPZEP equivalent, key selection considerations include PCI 33 MHz timing compliance, dual-power (3.3 V I/O / 1.8 V core) operation, physical write posting support, deep FIFO buffering for host latency tolerance, and SBP-2 protocol acceleration capability.

Technical Context

The TSB12LV26TPZEP integrates a PCI bus master interface with memory-mapped OHCI registers, enabling direct DMA transfers between IEEE 1394 devices and system memory without CPU intervention. Its internal arbitration supports multiple isochronous contexts and cacheline burst transfers.

It implements PHY/link interface control via bidirectional PHY_CTL0/PHY_CTL1 and eight PHY_DATA[0–7] lines, with external cycle timer synchronization and physical write posting buffers optimized for Serial Bus Protocol 2 (SBP-2) performance in storage applications.

Key Specifications

Pinout & Package

TSB12LV26TPZEP is packaged in a 100-terminal LQFP (PZ) with exposed thermal pad, pin-compatible with industry-standard PQFP footprint and RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSB12LV23TPZEP and VT6306-LE, the TSB12LV26TPZEP uniquely combines extended temperature operation, 5 V-tolerant PCI I/O, external cycle timer control, and dual GPIOs-making it the only option qualified for ruggedized machine vision and medical imaging platforms requiring deterministic timing and long-term supply stability.

Availability

TSB12LV26TPZEP is available at Aetrix Electronics and suitable for digital video capture systems, industrial machine vision interfaces, medical imaging data acquisition, and desktop PC FireWire expansion requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for TSB12LV26TPZEP 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 and communications ICs.

The TSB12LV26TPZEP belongs to TI's OHCI-Lynx 1394 host controller product line, designed specifically for high-reliability PCI-based FireWire bridging in industrial, medical, and broadcast video applications demanding deterministic timing and extended temperature operation.

FAQ

What is the operating temperature range supported by the TSB12LV26TPZEP?

The TSB12LV26TPZEP is qualified for operation from −40°C to +110°C, meeting JEDEC and PC 99 Design Guide requirements for extended temperature reliability. This makes the TSB12LV26TPZEP suitable for industrial enclosures and medical equipment where ambient temperatures exceed commercial-grade limits. The qualification includes HAST, temperature cycling, and electromigration testing per TI's Controlled Baseline program.

Does the TSB12LV26TPZEP support both 3.3 V and 5 V PCI bus signaling?

Yes, the TSB12LV26TPZEP supports 3.3 V PCI I/O with 5 V tolerance, enabling drop-in compatibility with legacy 5 V PCI slots without level-shifting circuitry. Its VCCP pins accept 3.3 V clamp voltage while maintaining safe operation under 5 V signaling transients-confirmed in Section 2.3 of the SGLS138B datasheet. This dual-voltage capability is retained in the TSB12LV26TPZEP variant.

How does the TSB12LV26TPZEP handle isochronous data transfers for real-time video?

The TSB12LV26TPZEP implements multiple independent isochronous transmit and receive contexts with dedicated command pointers and match registers, enabling concurrent AV streams without software arbitration. Its deep FIFOs absorb host memory latency, and the isochronous cycle timer register (Section 4.31) allows precise frame-aligned scheduling-critical for zero-drop DV capture. These features are fully implemented in the TSB12LV26TPZEP silicon.

What power management states does the TSB12LV26TPZEP support?

The TSB12LV26TPZEP supports D0 (fully active), D2 (low-power standby), and D3 (cold sleep) states per the PCI Bus Power Management Interface Specification. Wake events are signaled via PCI_PME and PHY_LPS terminals. The TSB12LV26TPZEP implements full register context retention in D2 and requires G_RST assertion to exit D3-details confirmed in Section 1.1 and Table 3-17 of the SGLS138B manual.

Is external ROM required for TSB12LV26TPZEP configuration?

No, the TSB12LV26TPZEP operates without external ROM; its default configuration is loaded from internal registers. However, a 2-wire serial ROM interface (SCL/SDA pins) is provided to load custom GUIDs, PHY parameters, or configuration overrides-optional per system design. The TSB12LV26TPZEP functions immediately after reset using factory-programmed defaults, as documented in Section 6 and Table 6-1 of SGLS138B.