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PDF VSC7927KFL Data sheet ( Hoja de datos )
| Número de pieza | VSC7927KFL | |
| Descripción | SONET/SDH 2.5Gb/s Laser Diode Driver | |
| Fabricantes | ETC | |
| Logotipo |  |
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VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7927
SONET/SDH 2.5Gb/s Laser Diode Driver
Features
• Rise Times of Less Than 100ps
• High Speed Operation
(Up to 2.5 Gb/s NRZ Data)
• Differential or Single-Ended Inputs
• Single Supply
• ECL-Compatible Clock and Data Inputs
• Direct Access to Modulation and Bias FETs
• Data Density Monitors
• On-Chip Reclocking Register
• On-Chip Mux for Clocked or Non-clocked Appli-
cations
• On-Chip 50Ω Input Termination: Clock and Data
General Description
The VSC7927 is a single 5V supply, 2.5 Gb/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 density outputs are provided to allow the user to adjust the laser bias
in high unbalanced data applications. Clock and data inputs are differentially terminated to 50Ω.
Applications
• SDH/SONET @ 622Mb/s, 1.244Gb/s, 2.488Gb/s
• Full Speed Fibre Channel (1.062Gb/s)
VSC7927 Block Diagram
DIN
DINTERM*
NDIN
50 Ω**
50 Ω**
DQ
M
U
X
CLK
CLKTERM*
NCLK
50 Ω**
50 Ω**
*Terminated to Off-chip Capacitor
**On Die Components
SEL
MK
NMK
DCC
VIP
VIB
IMOD
IOUT
NIOUT
IBIAS
IBIAS
MIP MIB
G52201-0, Rev 3.0
04/05/01
© 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
VSC7927
SONET/SDH 2.5Gb/s Laser Diode Driver
Figure 1: On-chip Data and Clock Input Configuration
DIN
(CLK)
DINTERM
(CLKTERM)
NDIN
(NCLK)
X
X
X
* 50
* 50
*On-chip
Components
GND
* 4.0K
* 6.4K
VSS
GND
DATA BUFFER
(CLOCK BUFFER)
VSS
DINTERM to -2.0V for Differential ECL Inputs
Figure 2: Single-Ended Operation
DATA
SOURCE
CLOCK
SOURCE
0.1µf
0.1µf
0.1µf
7927
DIN
DINTERM
NDIN
GND
0.1µf
GND
CLK
CLKTERM
NCLK
0.1µf
0.1µf
GND
GND
G52201-0, Rev 3.0
04/05/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Internet: www.vitesse.com
Page 5
5 Page 
VITESSE
SEMICONDUCTOR CORPORATION
Preliminary Data Sheet
VSC7927
SONET/SDH 2.5Gb/s Laser Diode Driver
Package Information - 24 Pin Ceramic Package (Straight Leads)
INDEX
1
2
3
A
4
5
6
Top View
A
24 23 22 21 20 19
E
18
17
16
15
14
13
Key mm
A 9.5
B 7.7
C 5.8
D 1.27
E 0.30
F 1.7
G 0.6
H 9.53
I 0.125
J 8.51
In
0.374
0.303
.230
0.050
0.012
0.067
0.024
0.375
0.005
0.335
7 8 9 10
D
11 12
Side View
B
I
C
GF
HC
NOTES: Drawing not to scale.
G52201-0, Rev 3.0
04/05/01
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Internet: www.vitesse.com
Page 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet VSC7927KFL.PDF ] | |
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