|
|
Número de pieza | VSC8162 | |
Descripción | 2.488 Gbit/sec SONET/SDH 1:16 Demux | |
Fabricantes | Vitesse Semiconductor | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de VSC8162 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
No Preview Available ! VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC8162
2.488 Gbit/sec SONET/SDH
1:16 Demux with Clock Recovery
Features
• 2.488Gb/s 1:16 Demux with Integrated Clock and
Data Recovery
• Recovered Clock and Data Available
• Monolithic Phase Locked Loop
• Digitally Adjustable Serial Data Sampling Point
• Differential Low Speed Outputs
• Differential/Single-ended Reference Clock
• Loss of Lock Detection
• Meets SONET OC-48 and SDH STM-16 Jitter
Tolerance Requirements
General Description
The VSC8162 combines a clock recovery unit (CRU) with a 1:16 demultiplexer on a single chip to directly
generate 16-bit wide data from an incoming 2.488Gb/s NRZ data stream. An on-chip Phase Locked Loop (PLL)
generates a 2.488GHz clock which remains phase locked to the incoming data. The incoming data is retimed
and demultiplexed to a 16-bit word. A Loss of Lock (LOL) signal indicates gross conditions where incoming
data no longer has sufficient transitions to keep the CRU in lock.
VSC8162 Functional Block DIagram
DINVERT
DI+
DI–
REFCK+
REFCK–
PADJ[4:0]
5
Data
Retime
Clock
Recovery
Divide
by 16
RTDO+
RTDO–
D0+
D0–
D15+
D15–
PARITY+
PARITY–
CLK16+
CLK16–
CLKO+
CLKO–
LOL
NOREF
G52209-0, Rev. 2.0
9/14/98
© VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 1
1 page VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC8162
2.488 Gbit/sec SONET/SDH
1:16 Demux with Clock Recovery
Interface Recommendations
REFCK+, REFCK– Inputs
Internal biasing will position the reference voltage of approximately -1.32V on both the true and comple-
ment inputs. This input can either be DC coupled or AC coupled; it can also be driven single-ended or differen-
tially. Figure 2 shows the configuration for single-ended, AC-coupling operation. In the case of direct coupling
and single-ended input, it is recommended that a stable VREF for ECL levels be used for the complementary
input.
Figure 2: Single-ended AC Coupling for REFCK+, REFCK– Inputs
Chip Boundary
VCC = GND
ZO
CIN REFCK+
-1.32V
-1.32V
RT = ZO
VTT
CSE
REFCK–
VTT VTT = -2V
CIN TYP = 0.1µF
CSE TYP = 0.1µF for single ended applications.
(Capacitor values are selected for REFCLK = 19.44 MHz)
R| | = 1kΩ (Approx.)
G52209-0, Rev. 2.0
9/14/98
© VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 5
5 Page VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC8162
2.488 Gbit/sec SONET/SDH
1:16 Demux with Clock Recovery
Table 4: PLL Parameters
Parameters
Description
Min Typ Max Units
Conditions
RCd
RCf
∆fRC
tACQ
tset
tclr
tdensity
tjitter
ttolerance
REFCK Duty Cycle
REFCK Frequency
REFCK Frequency Tolerance
Acquisition time
Loss of Lock set time
Loss of Lock clear time
Maximum zero-timing-content
period
Jitter generationa
Jitter toleranceb
45 — 55
— 19.44 —
-100 — +100
— — 20
2.3 — 100
125 — 250
— 1200 —
— 3.6 4.0
Exceeds mask in Figure 9
%
MHz
ppm
µs
µs
µs
—
—
—
With valid reference clock
From data interruption
From data restoration
UI For 0 BER
ps rms —
—
a. Measured at the HS clock output for jitter in the 12 kHz to 20 MHz band. Assume 1.2 ps rms input data jitter
b. Error-free operation guaranteed when electrical input signal is subject to jitter specified by mask in Figure 9.
Figure 12: VSC8162 Jitter Mask Specification
sinusoidal
input
jitter
30
15
slope = -20 dB/decade
amplitude
(UI p-p)
3.0
1.5
VSC8162 Mask
SONET/SDH Mask
0.30
0.15
10 600
6k 100k
frequency (Hz)
1000k
G52209-0, Rev. 2.0
9/14/98
© VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
Page 11
11 Page |
Páginas | Total 20 Páginas | |
PDF Descargar | [ Datasheet VSC8162.PDF ] |
Número de pieza | Descripción | Fabricantes |
VSC8161 | 2.488Gb/s SONET / SDH 16:1 Mux | Vitesse Semiconductor |
VSC8162 | 2.488 Gbit/sec SONET/SDH 1:16 Demux | Vitesse Semiconductor |
VSC8164 | 2.488 Gbit/sec to 2.7Gbit/sec 1:16 SONET/SDH Demux | Vitesse Semiconductor |
Número de pieza | Descripción | Fabricantes |
SLA6805M | High Voltage 3 phase Motor Driver IC. |
Sanken |
SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |