- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359430 > VSC7938 (Vitesse Semiconductor Corporation.) Laser Diode Driver with Automatic Power Control PDF資料下載
參數(shù)資料
| 型號： | VSC7938 |
| 廠商： | Vitesse Semiconductor Corporation. |
| 英文描述： | Laser Diode Driver with Automatic Power Control |
| 中文描述： | 激光二極管驅(qū)動(dòng)器，帶有自動(dòng)功率控制 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 213K |
| 代理商： | VSC7938 |
VITESSE
Preliminary Data Sheet
VSC7938
SONET/SDH 3.125Gb/s
Laser Diode Driver with Automatic Power Control
G52349-0, Rev 3.0
01/20/01
Page 7
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano
Camarillo, CA 93012
Tel: (800) VITESSE
FAX: (805) 987-5896
Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Table 5: Pin Identifications
Pin Name
Pin Number
Description
GND
1, 2, 7, 12, 16,
20, 23, 33, 34
36, 40, 42, 45
3, 6, 8, 11, 18, 24,
27, 32, 37, 48
4
5
9
10
13
Ground
V
CC
Power Supply
DATA+
DATA-
CLK+
CLK-
LATCH
Positive Data Input (PECL)
Negative Data Input (PECL)
Positive Clock Input (PECL). Connect to V
CC
if data retiming is not used.
Negative Clock Input (PECL). Leave unconnected if data retiming is not used.
Latch Input (TTL/CMOS). Connect to V
CC
for data retiming and GND for direct data.
Enable Input (TTL/CMOS). If used, connect DISABLE to GND. Connect to V
CC
for
normal operation and GND to disable laser bias and modulation currents.
Disable Input (TTL/CMOS). If used, leave ENABLE pin floating. Connect to GND for
normal operation and V
CC
to disable laser bias and modulation currents.
Connect capacitor to GND to delay turn on time of bias and modulation currents.
Output (TTL/CMOS). When low, it indicates APC failure.
ENABLE
14
DISABLE
15
SLWSTRT
FAIL
17
19
NC
21, 26, 28, 31, 39,
41
22
25
29
30
No Connection. Leave these pins unconnected.
APCFILT
BIAS
OUT+
OUT-
No effect on device operation.
Laser Bias Current Output
Positive Modulation-Current Output. I
MOD
flows when input data is high.
Negative Modulation-Current Output. I
MOD
flows when input data is low.
Monitor Diode Input. Connect to monitor photodiode anode. Connect capacitor to
GND to filter high-speed AC monitor photocurrent.
Capacitor to GND sets dominant pole of the APC feedback loop.
Do not connect.
Resistor to GND sets desired average optical power. If APC is not used connect 100k
resistor to GND.
Connect resistor to GND to set desired modulation current.
Connect resistor to GND to set maximum bias current. The APC function can subtract
from this value, but it cannot add to it.
MD
35
CAPC
RESERVED
38
43
APCSET
44
MODSET
46
BIASMAX
47
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VSC7938W | Laser Diode Driver with Automatic Power Control |
| VSC7939 | Laser Diode Driver with Automatic Power Control |
| VSC7939RP | Laser Diode Driver with Automatic Power Control |
| VSC7939W | Laser Diode Driver with Automatic Power Control |
| VSC7940RP | SONET/SDH 3.125Gb/s Laser Diode Driver with Automatic Power Control |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| VSC7938R0 | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:Laser Diode Driver with Automatic Power Control |
| VSC7938W | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:Laser Diode Driver with Automatic Power Control |
| VSC7939 | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:Laser Diode Driver with Automatic Power Control |
| VSC7939RP | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:Laser Diode Driver with Automatic Power Control |
| VSC7939W | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:Laser Diode Driver with Automatic Power Control |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。