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Número de pieza | GS1535 | |
Descripción | HD-LINX II-TM Multi-Rate SDI Automatic Reclocker | |
Fabricantes | Gennum Corporation | |
Logotipo | ||
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Key Features
• SMPTE 292M, 259M and 344M compliant
• Supports data rates of 143, 177, 270, 360, 540,
1483.5, 1485 Mb/s
• Supports DVB-ASI at 270Mb/s
• Auto and Manual Modes for rate selection
• Standards indication in Auto Mode
• 4:1 input multiplexor
• Lock Detect Output
• On-chip Input and Output Termination
• Differential inputs and outputs
• Configuarble automatic Mute or Bypass when not
locked
• Manual Bypass function
• SD/HD indication output to control GS1528 Dual
Slew-Rate Cable Driver
• Pb-free and Green
• Single 3.3V power supply
• Operating temperature range: 0°C to 70°C
Applications
• SMPTE 292M, SMPTE 259M and SMPTE 344M
Serial Digital Interfaces
GS1535 HD-LINX II™
Multi-Rate SDI
Automatic Reclocker
GS1535 Data Sheet
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 50Ω
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.
XTAL+ XTAL-
XTAL XTAL
OUT+ OUT-
LF+ LF- KBB
XTAL
OSC
BUFFER
DDI 0
DDI 1
DDI 2
DDI 3
D
A
T
A
M
U
X
DDI_SEL[1:0]
PHASE
FREQUENCY
DETECTOR
PHASE
DETECTOR
M
U
X
DIVIDE BY
152, 160, 208
CONTROL LOGIC
CHARGE
PUMP
RE-TIMER
VCO
DIVIDE BY
2,4,6,8,12,16
M
DATA BUFFER
DDO/DDO
U
X
DDO_MUTE
BYPASS
LOGIC
SS[2:0]
ASI/177
AUTO/MAN
LD
AUTOBYPASS
GS1535 Functional Block Diagram
BYPASS
18557 - 8 February 2005
1 of 22
www.gennum.com
1 page GS1535 Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin
Number
24, 25, 26
Name
SS[2:0]
Type
Description
BIDIRECTIONAL
When AUTO/MAN is HIGH, SS[0:2] are outputs, displaying the data rate to
which the PLL has locked.
When AUTO/MAN is LOW, SS[0:2] are inputs, forcing the PLL to lock only to a
selected data rate.
SS2 SS1 SS0
DATA RATE
SELECTED/FORCED (Mb/s)
0 00
143
0 01
177
0 10
270
0 11
360
1 00
540
1 01
1483.5/1485
27
28
29
33
34
36
44, 46
45
50, 51
52, 53
62, 63
4, 8, 12,16,
32, 35, 37,
43, 49, 54, 64
43
ASI/177
LD
RSVD
SD/HD
KBB
DDO_MUTE
DDO, DDO
DDO_VTT
XTAL_OUT+,
XTAL_OUT-
XTAL+, XTAL-
LF+, LF-
GND
GND_DRV
LOGIC INPUT
OUTPUT
RESERVED
OUTPUT
ANALOG INPUT
LOGIC INPUT
OUTPUT
PASSIVE
OUTPUT
Disables 177Mbps data rate in the AUTO data rate detection circuit. This
prevents a FALSE LOCK to 177Mbps when using DVB/ASI.
LOCK DETECT. HIGH when the PLL is locked.
DO NOT CONNECT.
This signal is LOW when the reclocker has locked to 1.485Gbps or
1.485/1.001Gbps, and HIGH when the reclocker has locked to 143Mbps,
177Mbps, 270Mbps, 360Mbps, or 540Mbps.
Controls the loop bandwidth of the PLL. Leave this pin floating for serial
reclocking applications.
Mutes the DDO/DDO outputs, when not in bypass mode.
Differential Serial Digital Outputs.
Center tap of two 50Ω on-chip termination resistors between DDO and DDO..
Differential buffered outputs of the reference oscillator.
INPUT
PASSIVE
PASSIVE
Reference crystal input. Connect to the GO1535.
Loop filter capacitor connection. (CLF = 47nF).
Recommended connect to GND.
PASSIVE
Recommended connect to GND.
18557 - 8 February 2005
5 of 22
5 Page GS1535 Data Sheet
LF+ LF-
Figure 2-4: Loop Filter
XTAL OUT+
1K
1K
XTAL OUT-
Figure 2-5: Crystal Ouput Buffer
KBB
V
REF
500R
Figure 2-6: KBB
18557 - 8 February 2005
11 of 22
11 Page |
Páginas | Total 22 Páginas | |
PDF Descargar | [ Datasheet GS1535.PDF ] |
Número de pieza | Descripción | Fabricantes |
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