GS1522 Datasheet, PDF (1/20 Pages) Gennum Corporation – HDTV Serial Digital Serializer

HD-LINX ^™ GS1522
HDTV Serial Digital Serializer
FEATURES
• SMPTE 292M compliant
• 20:1 parallel to serial conversion
• NRZ(I) encoder & SMPTE scrambler with selectable
bypass
• NRZ to NRZ(I) serial data conversion
• 1.485Gb/s and 1.485/1.001Gb/s operation
• lock detect output
• selectable DUAL or QUAD 75Ω cable driver outputs
• 8 bit or 10 bit input data support
• 20 bit wide inputs
• 3.3V and 5V CMOS/TTL compatible inputs
• single +5.0V power supply
APPLICATIONS
SMPTE 292M Serial Digital Interfaces for Video Cameras,
Camcorders, VTR's, Signal Generators, Portable Equip-
ment, and NLE's.
ORDERING INFORMATION
PART NUMBER
PACKAGE
GS1522-CQR
128 pin MQFP
TEMPERATURE
0°C to 70°C
PRELIMINARY DATA SHEET
DESCRIPTION
The GS1522 is a monolithic bipolar integrated circuit
designed to serialize SMPTE 274M and SMPTE 260M bit
parallel digital signals.
This device performs the following functions:
• Sync word mapping for 8-bit/10-bit operation.
• Parallel to Serial conversion of Luma & Chroma data
• Interleaving of Luma and Chroma data
• Data Scrambling (using the X⁹+X⁴+1 algorithm)
• Conversion of NRZ to NRZI serial data (using the (X+1)
algorithm)
• Selectable DUAL or QUAD 75Ω Cable Driver outputs
• Lock Detect Output
• 1.485Gb/s or 1.485/1.001Gb/s operation
This device requires a single 5V supply and typically
consumes less than 1000mW of power while driving two
75Ω cables.
The GS1522 uses the GO1515 external VCO connected to
the internal PLL circuitry to achieve ultra low noise PLL
performance.
SYNC_DETECT
_DISABLE
20
DATA_IN[19:0]
PCLK_IN
GO1515
INPUT
LATCH
RESET BYPASS
R_SET0
20
SYNC DETECT
SMPTE
SCRAMBLER _RESET
INTERLEAVER
PARALLEL
O/P0
BYPASS ^{TO SERIAL}
S_CLK
CONVERTER
NRZ TO NRZI
O/P1
PLL
P_LOAD
MUTE
FUNCTIONAL BLOCK DIAGRAM
SDO0+
SDO0-
SDO1+
SDO1-
R_SET1
SDO1_EN
PLL_LOCK
Revision Date: August 2000
Document No. 522 - 26 - 00
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. [phone] Fax. [phone] E-mail: [e-mail]
www.gennum.com