Texas Instruments TSB42AB4PDT

Overview

TSB42AB4PDT from Texas Instruments is an IEEE 1394a Link Layer Controller IC supporting DVB MPEG2, DirecTV™, and DV program streams per IEC 61883-2/4, with 8-Kbyte configurable FIFO, DTCP content protection hardware (dual M6 ciphers), and 16-bit Motorola 68000-style microprocessor interface. It operates from a single 3.3-V supply and interfaces directly to TI's TSB41LV0X/TSB41AXX PHY devices in consumer audio/video systems.

For engineers reviewing the TSB42AB4PDT datasheet, TSB42AB4PDT pinout, TSB42AB4PDT application, or TSB42AB4PDT equivalent, key selection criteria include IEEE 1394a compliance, dual-HSDI port support, hardware-accelerated DTCP (M6 cipher + SHA-1 + RNG), PID filtering for MPEG2 transport streams, and TQFP-128 package compatibility with industrial CE reference designs.

Technical Context

The TSB42AB4PDT implements full-duplex IEEE 1394a link-layer functionality with integrated bus management, self-ID verification, and interrupt-driven host control. Its architecture supports simultaneous transport of DVB, DirecTV, DV, and asynchronous streams using up to eight independent FIFO partitions.

It features two bidirectional High-Speed Data Interface (HSDI) ports-each with dedicated DTCP cipher modules-and hardware-based MPEG2 time stamp release per IEC 61883-4. The device includes separate async acknowledge buffering and JTAG scan support for post-assembly validation.

Key Specifications

Pinout & Package

TQFP-128 (PDT) package, 14.0 mm × 14.0 mm body, 1.2 mm max height, 0.4 mm pitch, RoHS-compliant NIPDAU finish, MSL Level-3 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TSB42AA4PDT and TSB42AB4IPDT, the TSB42AB4PDT provides certified DTCP content protection at commercial temperature range - making it optimal for mainstream set-top boxes and DVRs where encryption compliance and cost are both critical.

Availability

TSB42AB4PDT is available at Aetrix Electronics and suitable for digital video recorders, satellite set-top boxes, and professional AV editing systems requiring stable component supply and long-term FireWire 1394a link-layer support.

Supply support for TSB42AB4PDT 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 and embedded processing solutions across industrial, automotive, and consumer markets.

The ceLynx product line-including TSB42AB4PDT-is designed specifically for high-volume consumer electronics applications requiring secure, low-latency IEEE 1394a transport of MPEG2, DV, and encrypted audio/video streams.

FAQ

What is the primary function of the TSB42AB4PDT in a consumer electronics system?

The TSB42AB4PDT serves as a full IEEE 1394a link-layer controller that manages bidirectional transport of encrypted DVB, DirecTV™, and DV streams. It integrates DTCP hardware (dual M6 ciphers, SHA-1, RNG), 8-Kbyte configurable FIFO, and 16-bit microprocessor interface-enabling secure, low-CPU-overhead streaming in set-top boxes and DVRs. Its role is strictly link-layer bridging-not physical layer signaling or application-layer decoding.

Does the TSB42AB4PDT support both DVB and DirecTV™ MPEG2 transport streams?

Yes, the TSB42AB4PDT explicitly supports both DVB MPEG2 transport streams (per IEC 61883-4) and DirecTV™ transport streams over IEEE 1394, as confirmed in the SLLA217 datasheet. It applies DTCP encryption/decryption natively to both stream types using its dual hardware M6 cipher modules-one per HSDI port-ensuring compliance with content protection requirements for broadcast reception.

What package type and pin count does the TSB42AB4PDT use?

The TSB42AB4PDT uses a TQFP-128 package (orderable code PDT), measuring 14.0 mm × 14.0 mm with 0.4 mm pitch and 1.2 mm maximum height. It has 128 pins, RoHS-compliant NIPDAU finish, and JEDEC-standard tray packaging (90 units per tray). Pin 1 is marked by a corner chamfer and "1" indentation per TI's PDT0128A mechanical drawing.

Can the TSB42AB4PDT operate without external memory or co-processors?

Yes-the TSB42AB4PDT contains an embedded 8-Kbyte SRAM FIFO and all necessary logic for IEEE 1394a link-layer operation, including bus management, self-ID, and DTCP acceleration. No external memory or co-processor is required for basic streaming; however, a host microprocessor is needed for configuration, interrupt handling, and higher-layer protocol management per the Motorola 68000-style interface.

Is the TSB42AB4PDT compatible with Texas Instruments' TSB41LV03 physical layer device?

Yes, the TSB42AB4PDT is explicitly designed to interface directly with TI's TSB41LV0X and TSB41AXX family of 100/200/400-Mbps IEEE 1394 physical layer devices, including the TSB41LV03. The datasheet confirms seamless electrical and protocol-level interoperability-supporting full-duplex operation, automatic speed negotiation, and cable-power handshaking without additional level-shifting or glue logic.