DATASHEET To request the full datasheet, please visit www.intersil.com/products/tw6872 Triple-Rate (SD/HD/3G) SDI Transmitter with VC-2 Encoder and Audio Decoder TW6872 Features The TW6872 is a triple-rate (SD/HD/3G) SDI transmitter. It receives parallel BT.656/BT.1120/ASI video data from a CMOS sensor/ISP chip. It also receives analog audio, or serial digital audio. The TW6872 serializes the video and audio into an SDI stream and transmits it to an SDI receiver via its integrated cable driver. • Triple-rate (SD/HD/3G) SDI transmitter for Standard Definition (SD) and High Definition (HD), and 3G 10-bit component video • Encoding SDI standard of ITU-R BT.656/SMPTE 259M Level C, ITU-R BT.1120/SMPTE ST 292, SMPTE 424M 10-bit parallel component video inputs into 10-bit serial video output • BT.656/BT.1120 interface for CMOS sensor/ISP chip In addition to the standard SDI format with uncompressed raw video data, TW6872 can optionally compress video with a visually lossless VC-2 compression algorithm to send the video formats normally running at HD rate (1.5Gbps) on the cable at SD rate (270Mbps), and therefore achieve longer cable reach. • Asynchronous Serial Interface (ASI) for IEC 13818-1 compliant transport streams • Integrated 75Ω cable driver with pre/de-emphasis Together, the TW6872 and Intersil’s TW6874 SDI receiver provide a complete end-to-end SDI link solution and can operate with or without VC-2 compression. Integrated audio/video test patterns and PRBS checker ease system design and implementation. • Integrated VC-2 encoder allows transmission of HD video over SD transmission lengths • Analog audio and I2S serial audio input interfaces over ancillary field • Digital audio with PCM encoding for embedding audio samples into the audio ancillary field of SDI stream The TW6872 is available in a 76 Ld QFN. It is specified for operation over the -40°C to +85°C ambient temperature range and operates on two power supplies: 1V and 3.3V. A single 27MHz crystal is used for all supported audio/video operating modes. • Single 27MHz clock/crystal input • Optional clock output for use as the ISP chip’s clock input to enhance overall jitter Applications • PRBS7/23 and video/audio pattern generator • I2C for external micro-controller interface • SD/HD/3G-SDI Camera • Low power consumption • Small footprint LTZ-QFN76L (9mm x9mm) package • Pb-free (RoHS compliant) 1.0V 3.3V CLK CMOS SENSOR 3.3V ISP 21 3 DATA CLKO SDO VD SDO d u m m y AIN0 4.7k 75 COAX 1µF d u m m y 75 22pF 27MHz XTO AIN1 22pF RSET 1.6k HOST PROCESSOR TW6874S DI RX XTI 2.2µF 4.7k 0 75 open* TW6872 1µF open* 3.3V I2S 2.2µF 0 75 IRQ I2C AINN *Final RLN values pending optimization. Place holder for inductor recommended. 2.2µF FIGURE 1. TW6872 TYPICAL APPLICATION May 23, 2014 FN8616.0 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2014. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. 2 I C Bus™ is a trademark owned by NXP Semiconductors Netherlands, B.V. All other trademarks mentioned are the property of their respective owners. TW6872 For additional products, see www.intersil.com/en/products.html Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/en/support/qualandreliability.html Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com Submit Document Feedback 2 FN8616.0 May 23, 2014