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STB ICs feature power-saving modes

Posted: 24 Mar 2009     Print Version  Bookmark and Share

Keywords:STBs  hybrid STBs  demodulator 

STi5197, STi5189

From STMicroelectronics comes two single-chip STB ICs that enable manufacturers to boost product performance and implement added-value features using fewer components.

The STi5197 for cable STBs and STi5189 for satellite STBs share a common architecture and are software-compatible, enabling efficient development and fast time-to-market for products such as basic zappers, interactive and DVR-capable STBs, and hybrid STBs.

The STi5197 includes a QAM demodulator, and the STi5189 includes a QPSK demodulator. Both products have a common architecture for MPEG-2 audio/video-decoding and application-processing functions. The common architecture saves product development time, lowers BOM costs and simplifies PCB design to deliver highly price-competitive products into global markets. Each device supports relevant cable or satellite broadcast standards. The STi5197 supports DVB-C including ITU-T J83 Annexes A/B/C and Transport Stream Multiplex Frame. The STi5189 supports DVB-S for satellite. All industry-standard middleware and browsers are also supported.

Both ICs support all major conditional-access security schemes, with integrated DVB, Data Encryption Standard, Multi2 and Integrated Conditional Access Module descramblers as well as a built-in smart-card interface, which will help to broaden markets for pay-TV services.

Additional features common to both devices include an interface to off-chip flash memory, enabling support for a PVR-type time-shift feature without requiring HDD. The USB interface provided is ideal for general connectivity including implementing DVR-enabled STBs. An Ethernet interface is also integrated, enabling manufacturers to build hybrid STBs on the same platform. There is also an integrated audio sub-system providing digital and analogue outputs, and supporting MP3 and Dolby Digital 5.1 decoding.

Software compatibility between the STi5197 and STi5189 streamlines development of either cable or satellite products. In addition, ST's STB-development ecosystem provides common development tools and the fully documented and supported programming interface STAPI, which enables easy porting of software, thus promoting code re-use and compliance with industry standards.

Compared with previous-generation STB ICs, the new devices also benefit from higher processing performance and sophisticated power management featuring two power-saving modes to help designers meet local energy-efficiency regulations for consumer products.

Both devices are available in a choice of 23mm x 23mm plastic BGA or cost-optimised 15mm x 15mm low-profile fine-pitch BGA package.

- Henri Arnold
EE Times Europe

Visit Embedded Design India to learn more about STB ICs.





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