GS3470 datasheet(2/169 Pages) SEMTECH

2 / 169 page

GS3470

Final Data Sheet

Rev.8

PDS-060500

September 2017

2 of 169

Semtech

www.semtech.com

Description

The GS3470 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 GS3470 devices are used.

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 GS3470 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.



GS3470 Functional Block Diagram

DDI0

DDI1

Retimer

Buffer

DDO

De-Scramble

Sync Detect

CRC Check

CRC Insertion

Parallel Output

Audio Extraction

ANC Extraction

FIFO

RC Bypass

DDO

Input Switch

DDI0

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

DDI1

CT1

Host Interface

JTAG Test

Frequency Reference

POR

PWR_DWN

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