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Firewire Device Incorporates Content Protected Streaming Audio Capability

Debuting as a second-generation device from the ceLynx family, the TSB43CA43A is said to be the industry's first Firewire device to integrate content protected streaming audio capability. As the device supports digital transmission content protection (DTCP), content can be sent digitally across the 1394 interface with no need for conversion to analog and down-mixing or down-sampling. The chip is also reported to enable a single-cable connection between a SACD/DVD-audio player and A/V receiver, as opposed to the six cables currently required. When a 1394b repeater hub is used, it supports distances up to 100m. The TSB43CA43A integrates an embedded, 50 MHz ARM microprocessor, which reduces the burden on the system CPU by handling the 1394 transaction layer, DTCP authentication and key exchange, and service interrupts. Other features of the chip include 256 KB of program memory and support for IEC61883-6, 60958 and 61937 (SPDIF), two- and six-channel PCM, and multi-bit linear audio formats. Audio interfaces supported include S/PDIF, I2S, and MLPCM. A second device, the TSB43CB43A, has the same features as the TSB43CA43A except it comes without DTCP. The TSB43CA43A comes in a 176-pin BGA package and the TSB43CB43A comes in a 176-pin QFP. Pricing for the TSB43CB43A is $15 each/1,000. TEXAS INSTRUMENTS INC., Dallas, TX. (800) 477-8924 ext 4500.


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