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參數(shù)資料
| 型號： | VSC7940W |
| 廠商： | VITESSE SEMICONDUCTOR CORP |
| 元件分類： | 其它接口 |
| 英文描述： | SONET/SDH 3.125Gb/s Laser Diode Driver with Automatic Power Control |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, UUC48 |
| 封裝： | DIE-48 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 167K |
| 代理商： | VSC7940W |
VITESSE
Preliminary Data Sheet
VSC7940
SONET/SDH 3.125Gb/s
Laser Diode Driver with Automatic Power Control
G52357-0, Rev 3.2
05/11/01
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
Power Supply: 5V
±
5%
DC-Coupled to Laser Diode
Programmable Modulation Current: 5mA to 100mA
Programmable Bias Current: 1mA to 100mA
Enable/Disable Control
Automatic Optical Average Power Control
Modulation and Bias Current 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 VSC7940 is a single 5V supply laser diode driver specially designed for SONET/SDH applications 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 controlled with
an external capacitor. Other features include enable/disable control, 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 opti-
cal power. The VSC7940 is available in die form or in a 32-pin TQFP package.
Block Diagram
Q
S E T
CLR
Q
D
MUX
MODSET
BIASMAX
CAPC
APC
APCSET
LATCH
1nF
MODMON
MD
FAIL
BIAS
BIASMON
DATA+
DATA-
CLK+
CLK-
ENABLE
DISABLE
V
CC
V
CC
V
CC
IOUT+
IOUT-
V
CC
R
F
C
F
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| 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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| VSC7959 | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:3.125Gb/s CML Limiting Amplifier with LOS Detect |
| VSC7959W | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:3.125Gb/s CML Limiting Amplifier with LOS Detect |
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