鈥?/div>
SMPTE 292M, SMPTE 259M and SMPTE 344M Serial
Digital Interfaces
DESCRIPTION
The GS1535 Multi-Rate Serial Digital Reclocker is designed
to automatically recover the embedded clock signal and re-
time the data from a SMPTE 292M, SMPTE 259M or SMPTE
344M compliant digital video signal.
The device removes the high frequency jitter components
from the bit-serial stream. Input termination is on-chip for
seamless matching to 50鈩?transmission lines. An LVPECL
compliant output interfaces seamlessly to the GS1528
Cable Driver
The GS1535 can operate in either auto or manual rate
selection mode. In Auto mode the GS1535 automatically
detects and locks onto an incoming SMPTE SDI data signal
from 143 Mb/s to 1.485 Gb/s. For single rate data systems,
the GS1535 can be configured to operate in manual mode.
In both modes, the GS1535 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 GS1535 will
automatically or manually enter a bypass mode in order to
pass the signal without reclocking.
The ASI/177 input pin allows for manual selection of support
of either 177Mb/s or DVB-ASI inputs
GS1535
XTAL+ XTAL-
XTAL XTAL
OUT+ OUT-
LF+ LF-
KBB
DDO_MUTE
XTAL
OSC
BUFFER
RE-TIMER
M
U
X
DATA BUFFER
DDO/DDO
DDI 0
PHASE
FREQUENCY
DETECTOR
D
A
T
A
M
U
X
M
U
X
CHARGE
PUMP
VCO
DDI 1
PHASE
DETECTOR
DIVIDE BY
2,4,6,8,12,16
DIVIDE BY
152, 160, 208
DDI 2
DDI 3
DDI_SEL[1:0]
CONTROL LOGIC
BYPASS
LOGIC
SS[2:0]
ASI/177
AUTO/MAN
LD
AUTOBYPASS
BYPASS
GS1535 FUNCTIONAL BLOCK DIAGRAM
Revision Date: June 2003
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 E-mail: info@gennum.com
www.gennum.com
Document No. 18557 - 4