TSB81BA3E

The TSB81BA3E from Texas Instruments is a versatile IEEE 1394b three-port cable transceiver and arbiter designed for high-performance serial bus applications. It fully supports the provisions of IEEE P1394b Revision 1.33+ at 1-Gigabit signaling rates, as well as IEEE 1394a-2000 and 1394-1995 standards. This device is interoperable with Firewire, i.LINK, and SB1394 implementations.

This transceiver provides three fully backward-compatible, bilingual P1394b cable ports capable of operating at up to 800 Megabits per second (Mbits/s). It also supports three 1394a-2000 compliant cable ports at 100/200/400 Mbits/s. Key 1394a-2000 features include connection debounce, arbitrated short reset, multispeed concatenation, arbitration acceleration, fly-by concatenation, and port disable/suspend/resume functionality.

Designed with power efficiency in mind, the TSB81BA3E includes power-down features and a low-power sleep mode, making it suitable for battery-powered applications. It is compliant with Open Host Controller Interface (HCI) requirements and features cable power presence monitoring. The device offers flexible data interface options, selectable between 1394a-2000 mode (2/4/8 parallel bits at 49.152 MHz) and 1394b mode (8 parallel bits at 98.304 MHz).

The TSB81BA3E is available in an 80-pin TQFP (PFP) thermally enhanced package and a 168-pin ZAJ (BGA) package. It incorporates fail-safe circuitry to protect connected devices during power loss and includes a common-mode noise filter for improved signal integrity. Software device reset (SWR) and port programmability for forcing 1394a mode are also supported.