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參數(shù)資料
| 型號： | VSC7939W |
| 廠商： | VITESSE SEMICONDUCTOR CORP |
| 元件分類： | 其它接口 |
| 英文描述： | Laser Diode Driver with Automatic Power Control |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, UUC48 |
| 封裝： | DIE-48 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大?。?/td> | 226K |
| 代理商： | VSC7939W |
VITESSE
Preliminary Data Sheet
VSC7939
SONET/SDH 3.125Gb/s
Laser Diode Driver with Automatic Power Control
G52350-0, Rev 3.2
02/26/01
Page 1
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano Camarillo, CA 93012
Tel: (800) VITESSE FAX: (805) 987-5896 Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Features
Applications
General Description
The VSC7939 is a single 3.3V or 5V supply laser diode driver specially designed for SONET/SDH applica-
tions up to 3.125Gb/s. External resistors set a wide range of bias and modulation currents for driving the laser.
Data and clock inputs accept differential PECL signals. The automatic power control (APC) loop maintains a
constant average optical power over temperature and lifetime. The dominant pole of the APC loop can be con-
trolled with an external capacitor. Other features include enable/disable control, short-circuit protection for the
modulation and bias inputs, short rise and fall times, programmable slow-start circuit to set laser turn-on delay,
and failure-monitor output to indicate when the APC loop is unable to maintain the average optical power. The
VSC7939 is available in die form or in a 32-pin TQFP package.
Block Diagram
Power Supply: 3.3V or 5V
±
5%
AC-Coupled to Laser Diode
Programmable Modulation Current: 5mA to 60mA
Programmable Bias Current: 1mA to 100mA
Enable /Disable Control
Typical Rise/Fall Times of 60ps
Automatic Optical Average Power Control
Supply Current of 33mA at 3.3V
3.3V Operation
Q
SET
CLR
Q
D
MUX
APC
BIAS
V
CC
IOUT+
IOUT-
MD
MODSET
BIASMAX
CAPC
APCSET
FAIL
LATCH
1nF
MODMON
BIASMON
DATA+
DATA-
CLK+
CLK-
ENABLE
DISABLE
C
D
L
P
L
P
V
CC
V
CC
V
CC
C
F
R
F
SONET/SDH at 622Mb/s, 1.244Gb/s,
2.488Gb/s, 3.125Gb/s
Full-Speed Fibre Channel (1.062Gb/s)
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| VSC7940RP | SONET/SDH 3.125Gb/s Laser Diode Driver with Automatic Power Control |
| VSC7940 | SONET/SDH 3.125Gb/s Laser Diode Driver with Automatic Power Control |
| VSC7940W | SONET/SDH 3.125Gb/s Laser Diode Driver with Automatic Power Control |
| VSC7958 | 2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications |
| VSC7958CC | 2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| VSC7940 | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:SONET/SDH 3.125Gb/s Laser Diode Driver with Automatic Power Control |
| VSC7940RP | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:SONET/SDH 3.125Gb/s Laser Diode Driver with Automatic Power Control |
| VSC7940W | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:SONET/SDH 3.125Gb/s Laser Diode Driver with Automatic Power Control |
| VSC7958 | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications |
| VSC7958CC | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:2.5Gb/s High Speed Limiting Post Amplifier for OC-48/SDH-16 Applications |
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