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PDF GS2975A Data sheet ( Hoja de datos )
| Número de pieza | GS2975A | |
| Descripción | Multi-Rate SDI Automatic Reclocker | |
| Fabricantes | Gennum | |
| Logotipo |  |
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GS2975A HD-LINX® III Multi-Rate SDI Automatic Reclocker with Dual
Differential Outputs
Features
• SMPTE 424M, 292M, and 259M-C compliant
• Supports data rates of 270, 1483.5, 1485, 2967,
2970Mb/s
• Supports DVB-ASI at 270Mb/s
• Pb-free and RoHS Compliant
• Auto and Manual Modes for rate selection
• Standards indication in Auto Mode
• 4:1 input multiplexer patented technology
• Choice of dual reclocked data outputs or one data
output and one recovered clock output
• Footprint and drop-in compatible with existing
GS2975 designs
• Loss of Signal (LOS) Output
• Lock Detect Output
• On-chip Input and Output Termination
• Differential 50Ω inputs and outputs
• Mute, Bypass and Autobypass functions
• SD/HD indication output to control GS2978 Dual
Slew-Rate Cable Driver
• Single 3.3V power supply
• Operating temperature range: 0°C to 70°C
Description
The GS2975A is a Multi-Rate Serial Digital Reclocker
designed to automatically recover the embedded clock
from a digital video signal and re-time the incoming video
data.
The GS2975A Serial Digital Reclocker will recover the
embedded clock signal and re-time the data from a SMPTE
424M, SMPTE 292M, or SMPTE 259M-C compliant digital
video signal.
The GS2975A removes the high frequency jitter
components from the bit-serial stream. Input termination is
on-chip for seamless matching to 50Ω transmission lines.
The GS2975A 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
any supported rate. For single rate data systems, the
GS2975A 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 of non-SMPTE data rates,
the GS2975A can be configured to either automatically or
manually enter a bypass mode in order to pass the signal
without reclocking.
Applications
• SMPTE 424M, SMPTE 292M and SMPTE 259M-C Serial
Digital Interfaces
The GS2975A offers a choice of dual reclocked data outputs
or one data output and one recovered clock output. The
device is footprint and drop-in compatible with existing
GS2975 designs, with no additional application changes
required.
The GS2975A is Pb-free, and the encapsulation compound
does not contain halogenated flame retardant.
This component and all homogeneous sub-components are
RoHS compliant.
GS2975A HD-LINX® III Multi-Rate SDI Automatic
Reclocker with Dual Differential Outputs
Data Sheet
41487 - 4
April 2009
www.gennum.com
1 of 27
Free Datasheet http://www.datasheet4u.com/
1 page  
1.2 GS2975A Pin Descriptions
Table 1-1: Pin Descriptions
Pin Number Name
1, 3 DDI0, DDI0
2 DDI0_VTT
4, 8, 12,16, 32,
43, 49
5, 7
6
GND
DDI1,DDI1
DDI1_VTT
9, 11
10
DDI2, DDI2
DDI2_VTT
13, 15
14
DDI3, DDI3
DDI3_VTT
17, 18
DDI_SEL[1:0]
Type
Input
Passive
Passive
Description
Serial digital differential input 0.
Center tap of two 50Ω on-chip termination resistors between DDI0 and
DDI0.
Recommended connect to GND.
Input
Passive
Input
Passive
Input
Passive
Logic Input
Serial digital differential input 1.
Center tap of two 50Ω on-chip termination resistors between DDI1 and
DDI1.
Serial digital differential input 2.
Center tap of two 50Ω on-chip termination resistors between DDI2 and
DDI2.
Serial digital differential input 3.
Center tap of two 50Ω on-chip termination resistors between DDI3 and
DDI3.
Serial digital input select.
DDI_SEL1
0
0
1
1
DDI_SEL0
0
1
0
1
INPUT SELECTED
DDI0
DDI1
DDI2
DDI3
19 BYPASS
Logic Input
Bypass the reclocker stage.
When BYPASS is HIGH, it overwrites the AUTOBYPASS setting.
20
AUTOBYPASS
Logic Input
Automatically bypasses the reclocker stage when the PLL is not locked
This pin is ignored when BYPASS is HIGH.
21
AUTO/MAN
Logic Input
Auto/Manual select.
When set HIGH, the standard is automatically detected from the input data
rate. When set LOW, the user must program the input standard using the
SS[2:0] pins.
22 VCC_VCO
Power
Most positive power supply connection for the internal VCO section.
Connect to 3.3V.
23 VEE_VCO
Power
Most negative power supply connection for the internal VCO section.
Connect to GND.
GS2975A HD-LINX® III Multi-Rate SDI Automatic
Reclocker with Dual Differential Outputs
Data Sheet
41487 - 4
April 2009
5 of 27
Free Datasheet http://www.datasheet4u.com/
5 Page 
Table 2-2: AC Electrical Characteristics (Continued)
VCC = 3.3V ±5%, TA = 0°C to 70°C, unless otherwise shown. Typical values: VCC = 3.3V and TA =25°C
Parameter
Symbol Conditions
Min Typ Max
Loop Bandwidth
BWLOOP
2.97 Gb/s, KBB = VCC
2.97 Gb/s, KBB = FLOAT
2.97 Gb/s, KBB = GND,
<0.1dB Peaking
1.485 Gb/s, KBB = VCC
1.485 Gb/s, KBB = FLOAT
1.485 Gb/s, KBB = GND,
<0.1dB Peaking
270 Mb/s, KBB = VCC
270 Mb/s, KBB = FLOAT
270 Mb/s, KBB = GND,
<0.1dB Peaking
NOTES:
1. DDO0 to DDO1 skew alignment as defined here:
.
– 1.75
– 3.5
– 7.0
– 0.875
– 1.75
– 3.5
– 0.16
– 0.32
– 0.64
–
–
–
–
–
–
–
–
–
DDO0
DDO1
Units
MHz
MHz
MHz
Notes
–
–
–
MHz
MHz
MHz
–
–
–
MHz
MHz
MHz
–
–
–
DDSKEW
2. DDO0 to RCO skew alignment as defined here:
DDO0
RCO
DR
SKEW
3. KBB = Float, PRN = 223-1, input jitter = 40psp-p.
4. KBB = Float, PRN = 223-1, input jitter = 20psp-p.
GS2975A HD-LINX® III Multi-Rate SDI Automatic
Reclocker with Dual Differential Outputs
Data Sheet
41487 - 4
April 2009
11 of 27
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet GS2975A.PDF ] | |
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