GS3471 datasheet(2/179 Pages) SEMTECH

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GS3471

Final Data Sheet Rev.4

PDS-060498

September 2017

2 of 179

Semtech

www.semtech.com

Description

The GS3471 is a multi-rate SDI Receiver which includes

complete SMPTE processing. The SMPTE processing

features can be bypassed to support signals with other

coding schemes. Multi-link UHD can be supported when

multiple GS3471devices are used.

The GS3471 integrates Semtech's adaptive cable equalizer

technology, achieving unprecedented cable lengths and

jitter tolerance. The device features a dual input buffer with

a 2x2 MUX. The 2x2 MUX can select between either input for

de-serialization and can route either of the two inputs to the

serial loopback independently (reclocked or

non-reclocked). In addition, the integrated Retimer with an

internal VCO provides a wide Input Jitter Tolerance (IJT).

Configurable Power-down modes are available and allows

for increased flexibility. Each Power-down mode enables

power savings to a varying degree by selectively enabling

or disabling key features. Some of the options available in

Power-down mode are CSR access, PCLK, retimed DDO

loop-through output, and non-retimed DDO loop-through

output. Enabling or disabling each of these options will

offer power consumption levels to suit the application's

requirements.

The device has three other basic modes of operation which

include:

•

SMPTE mode

•

DVB-ASI mode

•

Data-Through mode

The GS3471 includes an audio de-embedder and audio

clocks are internally generated. Up to eight channels (two

audio groups) of serial digital audio may be extracted from

the video data stream, in accordance with SMPTE ST 272-C

and SMPTE ST 299.



GS3471 Functional Block Diagram

DDI

Retimer

Buffer

DDO

De-Scramble

Sync Detect

CRC Check

CRC Insertion

Parallel Output

Audio Extraction

ANC Extraction

FIFO

RC Bypass

DDO

Input Switch

DDI

CT0

IO_VDD

DOUT[19:0]

PCLK

STAT[5:0]

AOUT_1_2

AOUT_3_4

AOUT_5_6

AOUT_7_8

AUDIO_EN/DIS

ACLK

WCLK

AMCLK

SDI

Host Interface

JTAG Test

Frequency Reference

POR

PWR_DWN

AGC

CT1

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