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PDF VSC7924 Data sheet ( Hoja de datos )
| Número de pieza | VSC7924 | |
| Descripción | SONET/SDH 2.5Gb/s Laser Diode Driver | |
| Fabricantes | Vitesse Semiconductor | |
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VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7924
SONET/SDH 2.5Gb/s Laser Diode Driver
Features
• Rise Times Less Than 100ps
• High-Speed Operation
(Up to 2.5Gb/s NRZ Data)
• Single-Ended Operation
• Single Power Supply
• Direct Access to Modulation and Bias FETs
• Data Density Monitors
• 24-Pin Ceramic Package
Applications
• SONET/SDH at 622Mb/s, 1.244Gb/s, and 2.488Gb/s
• Full-Speed Fibre Channel (1.062Gb/s)
General Description
The VSC7924 is a single 5V supply, 2.5Gb/s laser diode driver with direct access to the laser modulation
and bias FETs. Laser bias and modulation currents are set by external components allowing precision monitor-
ing 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.
VSC7924 Block Diagram
IOUT NIOUT
DIN
VREF
*TERM
MK
NMK
VIP
VIB
IMOD
IBIAS
MIP MIB
*Terminated to Off-chip Capacitor
G52156-0, Rev 3.0
05/01/01
© 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  
www.DataSheet4U.com
VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7924
SONET/SDH 2.5Gb/s Laser Diode Driver
Input Termination Schemes
Figure 1: Input Structure
OV (GND)
DIN X
11.440k0Ω
VREF X
TERM X
12pF
3Ω
44.330k0Ω
114.40k0Ω
+
-
44.330k0Ω
• Nominal VREF = -1.3V
• 1400, 4300 Ohm Resistor
on die, nominal values
Nominal VREF = 1.3V
1.4kΩ, 4.3kΩ resistor on die, nominal values
GND -5.2V (VSS)
SOURCE
Figure 2: Single-Ended AC Coupled
50Ω
-2V
0.1µF
DIN
X
TERM or VREF
X
0.1µF
GND
+
-
GND
VSS
Figure 3: Single Ended AC Coupled with Offset Adjust
GND
SOURCE
0.1µf DIN
X
50Ω VREF
X
+
-
GND
2k0Ω00
4.330k0Ω
3 VSS
X
TERM
0.1µf
VSS GND
G52156-0, Rev 3.0
05/01/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Internet: www.vitesse.com
Page 5
5 Page 
www.DataSheet4U.com
VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7924
SONET/SDH 2.5Gb/s Laser Diode Driver
Ordering Information
The order number for this product is formed by a combination of the device number, and package style.
VSC7924 XX
Device Type
VSC7924: 2.5Gb/s Laser Diode Driver
Package Style
KF: (Ceramic - Straight Leads)
KFL: (Ceramic- Formed Leads)
Notice
Vitesse Semiconductor Corporation (“Vitesse”) provides this document for informational purposes only. This document contains pre-production
information about Vitesse products in their concept, development and/or testing phase. All information in this document, including descriptions of
features, functions, performance, technical specifications and availability, is subject to change without notice at any time. Nothing contained in this
document shall be construed as extending any warranty or promise, express or implied, that any Vitesse product will be available as described or
will be suitable for or will accomplish any particular task.
Vitesse products are not intended for use in life support appliances, devices or systems. Use of a Vitesse product in such applications without writ-
ten consent is prohibited.
G52156-0, Rev 3.0
05/01/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Internet: www.vitesse.com
Page 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet VSC7924.PDF ] | |
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