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參數(shù)資料
| 型號： | TZA3030HL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | SDH/SONET STM1/OC3 optical receiver |
| 中文描述： | RECEIVER, PQFP32 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大?。?/td> | 502K |
| 代理商： | TZA3030HL |
1998 Aug 24
14
Philips Semiconductors
Objective specification
SDH/SONET STM1/OC3 optical receiver
TZA3030
CML outputs: OUTCML and OUTQCML
The output impedance of the CML output driver is 100
(see Fig.9) which doesn’t match the characteristic
impedance of the strip line. While this means that the
reflections of some incident edges will arrive at the driver
output on the PCB, this value was selected to reduce
power dissipation inside the IC. The parallel combination
of 100
and 50
(33
) will generate a signal swing of
200 mV (peak-to-peak value, single-sided) with a tail
current of 6 mA.
If the output impedance was 50
rather than 100
,
an 8 mA tail current would be needed to generate the
same voltage swing. This would increase power
dissipation by 33%.
If necessary, the output impedance of the generator can
be matched to the line impedance by connecting an
external 100
resistor in parallel with the output as shown
in Fig.10. The magnitude of the output voltage swing will
not change due to adaptive regulation. However, power
dissipation will increase by 33%.
Fig.9 CML interface circuit without matched impedance; low power dissipation.
handbook, full pagewidth
MBK861
VOQ
VO
VIQ
VI
100
100
50
50
VCC
VCC
Zo = 50
Zo = 50
generator
inside TZA3030
interconnect
PCB
receiver
inside TZA3004
Fig.10 CML interface circuit with matched impedance; high power dissipation.
handbook, full pagewidth
MBK862
VOQ
VO
VIQ
VI
100
100
100
100
50
50
VCC
VCC
Zo = 50
Zo = 50
generator
inside TZA3030
interconnect
PCB
receiver
inside TZA3004
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TZA3030U | SDH/SONET STM1/OC3 optical receiver |
| TZA3031AHL | SDH/SONET STM1/OC3 laser drivers(SDH/SONET STM1/OC3 激光驅(qū)動器) |
| TZA3034T | SDH/SONET STM1/OC3 postamplifiers |
| TZA3034 | SDH/SONET STM1/OC3 postamplifier |
| TZA3034TT | SDH/SONET STM1/OC3 postamplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TZA3030U | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SDH/SONET STM1/OC3 optical receiver |
| TZA3031 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SDH/SONET STM1/OC3 and STM4/OC12 transceiver |
| TZA3031AHL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SDH/SONET STM1/OC3 laser drivers |
| TZA3031BHL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SDH/SONET STM1/OC3 laser drivers |
| TZA3031U | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:SDH/SONET STM1/OC3 laser drivers |
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