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GS1675 SD/HD SDI Reclocker

Data Sheet

54174 - 1

June 2011

GS1675 SD/HD SDI Reclocker

www.gennum.com

The GS1675 is a multi-rate serial digital reclocker designed to automatically recover the embedded clock from a digital video signal and

retime the incoming video data. It will recover the embedded clock signal and retime the data from a SMPTE 292M or SMPTE 259M-C

compliant digital video signal.

The GS1675 can operate in either Auto or Manual rate selection mode. In Auto mode, the device will automatically detect and lock onto

incoming SMPTE SDI data signals at SD and HD data rates. For single-rate data systems, the GS1675 can be configured to operate in

Manual mode. In both modes, the device requires only one external crystal to set the VCO frequency when not locked, and provides

adjustment-free operation. In systems which require passing non-SMPTE data rates, the GS1675 can be configured to either

automatically or manually enter a bypass mode in order to pass the signal without reclocking.

The GS1675 accepts industry-standard differential input levels including LVPECL and CML. The differential data and clock outputs

feature selectable output swing via the host interface, ensuring compatibility with most industry-standard, terminated differential

receivers. The GS1675 features dual differential outputs. The second output can be configured to emit either the recovered clock signal

or the re-timed video data.

Key Features

•

SMPTE 292M and SMPTE 259M-C compliant

•

Supports DVB-ASI at 270Mb/s

•

Single-supply operation at 3.3V or 2.5V

•

180mW typical power consumption (213mW with RCO

enabled) at 2.5V

•

2:1 input multiplexer patented technology

•

Choice of dual reclocked data outputs or one reclocked data

output and one clock output

•

Uses standard 27MHz crystal

•

Differential inputs and outputs

supports DC-coupling to industry-standard differential

logic

on-chip 100Ω differential data input/output termination

selectable 400mVppd or 800mVppd output swing on

each output

•

4-wire SPI host interface for device configuration and

monitoring

•

Standard logic control and status signal levels

•

Auto and Manual modes for rate selection

•

Standards indication in Auto mode

•

Lock Detect Output

•

Mute, Bypass and Autobypass functions

•

SD/HD indication output to control GS1678 or GS1679 cable

drivers

•

Operating temperature range: -40°C to +85°C

•

32 pin 5mm x 5mm QFN package

•

Pb-free and RoHS compliant

•

Forward pin-compatible with the Gennum's 3G GS2965

reclocker

•

Typical Application Circuit

(Pin15)

VEE_DDO1

VEE_DDO0

VEE_CP

(Pin20)

(Pin24)

(Pin31)

VEE_VCO

VSS_DIG

(Pin10)

VDD_DIG

(Pin19)

(Pin23)

(Pin32)

(Pin14)

VCC_DDO1

VCC_DDO0

VCC_CP

VCC_VCO

(Pin9)

VCO_SEL

Data Input 0

Data Input 1

Data Output 0

Data Output 1

SPI

GND

VCC2

GND

GND

GND

GND

GND

GND

VCC2

CSb

SCK

SDO

SDI

HIFb

SD/HD

LOS

LOCKED

Y1

ABM7-27.000MHZ-D2Y-T

C16

DNP

C13

10n

C2

18p

C30

10n

C4

220n

C20

10n

C27

DNP

R23

422R

JP5

1

2

R24

267R

C31

1u

C7

10n

C33

10u

C1

18p

R6

1M

U2

GS1675

U2

DDI0

3

HIF

4

DDI0

5

DDI1

6

DDI1

7

NC

8

LOCKED

12

LOS

13

DDO0

22

DDO0

21

DDO1/RCO

18

SD/HD

16

CP_CAP

2

LF+

1

SDI

30

SDO

29

SCK

28

CS

27

XTAL-

26

XTAL+

25

DDO1/RCO

17

C34

220n

C23

DNP

C15

DNP

C32

10n

C3

47n