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PDF GS2986 Data sheet ( Hoja de datos )
| Número de pieza | GS2986 | |
| Descripción | Multi-Rate SDI Reclocker | |
| Fabricantes | Gennum | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de GS2986 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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GS2986 Multi-Rate SDI Reclocker with Equalization & De-emphasis
Features
• SMPTE 424M, 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
• Input signal equalization and output-signal de-emphasis
settings to compensate for board-trace dielectric losses
• 4:1 input multiplexer patented technology
• Choice of dual reclocked data outputs or one reclocked data
output and one clock output
• Uses standard 27MHz crystal
• Cascadable crystal buffer supports multiple reclockers using
a single crystal
• Differential inputs and outputs
support DC coupling to industry-standard differential
logic
on-chip 100Ω differential data input/output termination
selectable 400mVppd or 800mVppd output swing on
each output
seamless interface to other Gennum products
• 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 GS2978 or GS2988 dual
slew-rate cable drivers
• Operating temperature range: -40°C to +85°C
• Small footprint QFN package (6mm x 6mm)
• Pb-free and RoHS compliant
Applications
• SMPTE 424M, SMPTE 292M and SMPTE 259M-C coaxial
cable serial digital interfaces
Description
The GS2986 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 424M,
SMPTE 292M, or SMPTE 259M-C compliant digital video signal.
A serial host interface provides the ability to configure and
monitor multiple GS2986 devices in a daisy-chain configuration.
Adjustable input trace equalization (EQ) for up to 40” of FR4 trace
losses, and adjustable output de-emphasis (DE) for up to 20” of
FR4 trace losses, can be configured via the host interface.
The GS2986 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 GS2986 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.
The GS2986 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 GS2986 features dual differential outputs. The second output
can be configured to emit either the recovered clock signal or the
re-timed video data. This output can also be disabled to save
power.
In systems which require passing of non-SMPTE data rates, the
GS2986 can be configured to either automatically or manually
enter a bypass mode in order to pass the signal without reclocking.
The GS2986 is Pb-free, and the encapsulation compound does not
contain halogenated flame retardant. This component and all
homogeneous sub-components are RoHS compliant.
GS2986 Multi-Rate SDI Reclocker with Equalization &
De-emphasis
Data Sheet
52134 - 1
March 2010
www.gennum.com
1 of 41
Free Datasheet http://www.datasheet4u.com/
1 page  
1. Pin Out
1.1 Pin Assignment
CP_CAP
DDI0
HIF
DDI0
DDI1
DDI1
DDI2
DDI2
DDI3
DDI3
40 39 38 37 36 35 34 33 32 31
1
2
3
4 GS2986
5 40-pin QFN
6 (top view)
7
8
9
10
11 12 13 14 15 16 17 18 19 20
30
29
28
27
26
25
24
23
22
21
Ground Pad
(bottom of package)
VEE_DDO0
VCC_DDO0
DDO0
DDO0
VEE_DDO1
VCC_DDO1
DDO1/RCO
DDO1/RCO
DDO1_DISABLE
SD/HD
Figure 1-1: GS2986 Pin Out
GS2986 Multi-Rate SDI Reclocker with Equalization &
De-emphasis
Data Sheet
52134 - 1
March 2010
5 of 41
Free Datasheet http://www.datasheet4u.com/
5 Page 
Table 2-2: AC Electrical Characteristics (Continued)
Parameter
Output De-Emphasis
Input Jitter Tolerance
Loop Bandwidth
PLL Lock Time (asynchronous)
PLL Lock Time (synchronous)
Serial Data output Jitter Intrinsic
(DDO0)
Output Rise/Fall Time
Output Rise/Fall Time Mismatch
Symbol
Conditions
− OFF - 0
ON - 0
ON - 1
ON - 2
ON - 3
ON - 4
ON - 5
ON - 6
ON - 7
− square-wave modulated
jitter
BWLOOP
(270Mb/s)
KBB = VCC
KBB = FLOAT
KBB = GND
BWLOOP
(1485Mb/s)
KBB = VCC
KBB = FLOAT
KBB = GND
BWLOOP
(2970Mb/s)
KBB = VCC
KBB = FLOAT
KBB = GND
talock
−
tslock
CLF = 47nF, SD/HD = 0
CLF = 47nF, SD/HD = 1
tOJ(270MB/s)
KBB = FLOAT
PRN 2^23-1 test pattern
tOJ(1485MB/s)
KBB = FLOAT
PRN 2^23-1 test pattern
tOJ(2970MB/s)
KBB = FLOAT
PRN 2^23-1 test pattern
tr/f 20% to 80% (400mV
swing)
20% to 80% (800mV
swing)
−−
Min Typ Max Units Notes
− 0 − dB −
− 0 − dB −
− 0.7 − dB −
− 1.3 − dB −
− 2 − dB −
− 2.6 − dB −
− 3.3 − dB −
− 4 − dB −
− 4.7 − dB −
0.8 − − UI −
− 170 − kHz
− 340 − kHz
− 680 − kHz
− 0.875 −
MHz
− 1.75 − MHz
− 3.5 − MHz
− 1.75 − MHz
− 3.5 − MHz
− 7.0 − MHz
− 0.5 1 ms
− 0.5 4
μs
− 5 10 μs
− 0.01 −
UI
−
−
−
−
−
−
−
−
−
−
−
−
−
− 0.03 − UI −
− 0.05 − UI −
− 65 − ps
− 80 − ps
− − 15 ps
−
−
−
GS2986 Multi-Rate SDI Reclocker with Equalization &
De-emphasis
Data Sheet
52134 - 1
March 2010
11 of 41
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet GS2986.PDF ] | |
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