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PDF VSC7923 Data sheet ( Hoja de datos )
| Número de pieza | VSC7923 | |
| Descripción | SONET/SDH 2.5Gb/s Laser Diode Driver | |
| Fabricantes | Vitesse Semiconductor | |
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VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7923
SONET/SDH 2.5Gb/s Laser Diode Driver
Features
• Rise Times Less Than 100ps
• High Speed Operation (Up to 2.4Gb/s NRZ Data)
• Single-Ended or Differential Input Operation
• Single Power Supply
• Direct Access to Modulation and Bias FETs
• Data Density Monitors
Applications
• SONET/SDH at 622Mb/s, 1.244Gb/s,
2.488Gb/s, 3.125Gb/s
• Full-Speed Fibre Channel (1.062Gb/s)
General Description
The VSC7923 is a single 5V supply, 2.4 Gb/s laser diode driver with direct access to the laser modulation and
bias FET’s. Laser bias and modulation currents are set by external components allowing precision monitoring
and setting of the current levels. Data inputs accept ECL levels. Data density outputs are provided to allow the
user to adjust the laser bias in high unbalanced data applications.
VSC7923 Block Diagram
IOUT NIOUT
DIN
VREF
MK
NMK
VIP
IMOD
IBIAS
VIB
MIP MIB
G52203-0, Rev 3.0
05/11/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: [email protected]
Internet: www.vitesse.com
Page 1
1 page  
VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7923
SONET/SDH 2.5Gb/s Laser Diode Driver
Input Termination Schemes
Figure 1: Input Structure
OV (GND)
DIN X
VREF X
1400
4300
1400
+
-
4300
• Nominal VREF = -1.3V
• 1400, 4300 Ohm Resistor
on die, nominal values
SOURCE
SOURCE
-5.2V (VSS)
Figure 2: Single Ended AC Coupled
GND
50 Ohms
GND
GND
50Ω
0.1µF
DIN
X
VREF
X
+
-
-2V 0.1µF
GND
VSS
Figure 3: Differential AC Coupled
GND
0.1µF
GND GND 50Ω 0.1µF
GND
GND -2V
50Ω
DIN
X
X
VREF
+
-
-2V VSS
G52203-0, Rev 3.0
05/11/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Internet: www.vitesse.com
Page 5
5 Page 
VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7923
SONET/SDH 2.5Gb/s Laser Diode Driver
Pin Diagram for 24 Pin Ceramic Package
VSS
DIN
GND
GND
GND
VSS
24 23 22 21 20 19
1 18
2 17
3 16
4 15
5 14
6 13
7 8 9 10 11 12
VIB
GND
IOUT
GND
NIOUT
VSS
Note: Package bottom plate is connected to GND within the package.
Package lid is electrically unconnected.
G52203-0, Rev 3.0
05/11/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Internet: www.vitesse.com
Page 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet VSC7923.PDF ] | |
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