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參數(shù)資料
| 型號(hào)： | VSC7969YD1 |
| 廠商： | VITESSE SEMICONDUCTOR CORP |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | 3.125Gb/s Integrated Transimpedance and Limiting Amplifier with Signal Detect |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO16 |
| 封裝： | PLASTIC, TSSOP-16 |
| 文件頁(yè)數(shù)： | 9/14頁(yè) |
| 文件大小： | 170K |
| 代理商： | VSC7969YD1 |
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VITESSE
Advance Product Information
VSC7969
3.125Gb/s Integrated Transimpedance
and Limiting Amplifier with Signal Detect
G52355-0, Rev 2.0
02/09/01
Page 9
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano
Camarillo, CA 93012
Tel: (800) VITESSE
FAX: (805) 987-5896
Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Signal Detect
The signal detect feature of the VSC7969 provides a CMOS level output corresponding to the input current
level to the transimpedance amplifier. The assert and deassert levels of the signal detect pin can be adjusted by
placing an optional resistor from SD_ADJ to ground. The following tables show the two extremes at which the
signal detect pin will operate; open circuit and short-ciruit to ground.
Table 5: Signal Detect Function, SD_ADJ Open
With SD_ADJ (pin 16) shorted to ground, thresholds are 3dB higher, as shown in Table 6.
Table 6: Signal Detect Function, SD_ADJ Shorted to Ground
Photodetector Current Monitor
The IMON pin provides a linear measurement of the average input current from the photodetector to the
transimpedance amplifier. For example, if 20μA is the average input current to the transimpedance amplifier,
the current through the IMON pin will be 20μA (see the typical operating curve
“
IMON Characteristic, 0μA to
200μA
). To use this feature, connect the IMON pin to V
CC
using a resistor less than 2k
. If this feature is not
used, the IMON pin can be left unconnected.
Electrical
Min
Typ
Max
Units
Assert
Deassert
Hysteresis
3
1
1
5
9
3
4
μA
μA
dB
2.2
2
Electrical
Min
Typ
Max
Units
Assert
Deassert
Hysteresis
6
2
1
10
4.4
2
18
6
4
μA
μA
dB
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| VSC7969YD2 | 制造商:VITESSE 制造商全稱:Vitesse Semiconductor Corporation 功能描述:3.125Gb/s Integrated Transimpedance and Limiting Amplifier with Signal Detect |
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