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reference designTW6874

Renesas TW6874

Quad Triple-Rate (SD/HD/3G) SDI Receiver with Adaptive Equalizer, VC-2 Decoder and Audio CODEC

Overview

TopologyBoost Converter
IC revision1

Description

The TW6874 is a quad triple-rate (SD/HD/3G) SDI receiver. It has four independent channels, each consisting of an adaptive equalizer, clock data recovery, audio decoder and VC-2 decompression engine. Each channel can receive up to 2.97Gbps serial data over extended coaxial cable lengths anddeserialize the data into video/audio streams for the back-end device.The video streams are output as: 8-bit BT.656 for SD; BT.1120 in 8/16 bit mode for HD; or BT.1120 for 3G. The audio streams are output through an I2S audio digital interface in a multi-channel interleaving format. In addition to the extraction of embedded SDI audio, the TW6874 incorporates a 5-channel audio ADC decoder to decode analog audio inputs and outputthem through the same I2S interface. A visually lossless VC-2 (Dirac) compression/decompression engine is implemented in the TW6872/TW6874 SDI Tx/Rx pair to extend the reach of HD-SDI to that of SD-SDI. An interrupt pin can be used to signal the host processor of any conditions such as loss of video, audio detection and ancillary data packet detection. Finally, integrated audio test patternsand PRBS checker ease system design and implementation.

Features

  • Quad triple-rate (SD/HD/3G) SDI receiver for standard (SD)and high (HD/3G) definition 8-bit component video
  • Automatic SDI detection of SMPTE 259M Level C (SD-SDI),SMPTE ST 292 (1.5G SDI), and SMPTE 424M (3G SDI)signals
  • Each SDI input standard supported with ITU-R BT.656 (SD) orITU-R BT.1120 (1.5G and 3G) interface
  • Automatic SDI detection among ITU-R BT.656/SMPTE 259MLevel C, ITU-R BT.1120/SMPTE ST 292, SMPTE 424Msignals
  • Converts 10-bit serial digital component video input to 8-bitparallel video output
  • Adaptive equalizer/clock data recovery/VC-2 decompressionengine for each channel
  • 4 separate video output ports with BT. 656/BT. 1120 outputformat
  • 5-channel audio ADC (analog-to-digital converter)
  • Single multiplexed audio output DAC (digital-to-analogconverter)
  • Supports I2S master/slave interface for record output andplayback input with cascade
  • I2C and SPI interface
  • Pb-free (RoHS compliant) 256 ball LFBGA

Typical applications

  • SD/HD/3G-SDI DVR

More information

Products

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Product series
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
Material
Qty.
L(µH)
Tol. L
Test Condition L
Qmin.
Test Condition Q
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IR(mA)
fres(MHz)
SamplesAvailability & Sample
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744310115
SPECWE-HCI SMT Flat Wire High Current Inductor, 11.8 A, 7.5 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Performance Rated Current11.8 A
Saturation Current @ 10%7.5 A
Saturation Current @ 30%13 A
DC Resistance8.6 mΩ
MaterialSuperflux 
Packaging Unit1500 
Inductance1.15 µH
Inductance±20% 
Inductance100 kHz/ 100 mV 
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–
DC Resistance9.46 mΩ
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Self Resonant Frequency84 MHz
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744314101
SPECWE-HCI SMT Flat Wire High Current Inductor, 5.3 A, 1.8 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Performance Rated Current5.3 A
Saturation Current @ 10%1.8 A
Saturation Current @ 30%4 A
DC Resistance33 mΩ
MaterialSuperflux 
Packaging Unit1000 
Inductance10 µH
Inductance±20% 
Inductance100 kHz/ 100 mV 
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–
DC Resistance36.3 mΩ
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Self Resonant Frequency40 MHz
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744765062A
SPECWE-KI SMT Wire Wound Ceramic Inductor, –, –
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ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-KI SMT Wire Wound Ceramic Inductor
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Packaging Unit3000 
Inductance0.0062 µH
Inductance±5% 
Inductance250 MHz 
Q-Factor23 
Q-Factor250 MHz 
DC Resistance83 mΩ
Rated Current760 mA
Self Resonant Frequency5800 MHz
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