TSB41AB3

The Texas Instruments TSB41AB3 is a highly integrated IEEE 1394a transceiver and arbiter designed for high-performance serial bus applications. It fully supports the provisions of the IEEE 1394-1995 standard and the 1394a-2000 supplement, ensuring interoperability with FireWire and i.LINK implementations.

This device provides three fully compliant 1394a-2000 cable ports, capable of operating at 100, 200, or 400 Megabits per second. Key features include connection debounce, arbitrated short reset, multispeed concatenation, arbitration acceleration, fly-by concatenation, and port disable/suspend/resume functionality. It also supports extended resume signaling for compatibility with legacy DV devices.

Designed with power efficiency in mind, the TSB41AB3 includes power-down features for battery-powered applications, such as automatic device power down during suspend, a device power-down terminal, link interface disable via LPS, and inactive ports powered down. An ultralow-power sleep mode and node power class information signaling further enhance system power management. The device operates from a single 3.3-V supply and is housed in a low-cost, high-performance 80-pin TQFP thermally enhanced package.

Fail-safe circuitry is incorporated to sense sudden power loss and disable ports, preventing the TSB41AB3 from loading the TPBIAS of connected devices. It also features a 1394a-compliant common-mode noise filter on the incoming bias detect circuit to mitigate crosstalk noise. The TSB41AB3 is a direct drop-in upgrade for TSB41LV03APFP and TSB41LV03PFP.