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參數(shù)資料
| 型號(hào)： | ZL30406QGC1 |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | SONET/SDH Clock Multiplier PLL |
| 中文描述： | ATM/SONET/SDH SUPPORT CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, 1 MM HEIGHT, LEAD FREE, MS-026, TQFP-64 |
| 文件頁(yè)數(shù)： | 11/21頁(yè) |
| 文件大?。?/td> | 307K |
| 代理商： | ZL30406QGC1 |
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ZL30406
Data Sheet
11
Zarlink Semiconductor Inc.
2.3 Tristating LVPECL Outputs
The ZL30406 has four differential 77.76 MHz LVPECL outputs, which can be used to drive four different OC-3/OC-
12/OC-48 devices such as framers, mappers and SERDES. In the case where fewer than four clocks are required,
a user can disable unused LVPECL outputs on the ZL30406 by pulling the corresponding enable pins low. When
disabled, voltage at the both pins of the differential LVPECL output will be pulled up to Vcc - 0.7 V.
For applications requiring the LVPECL outputs to be in a tri-state mode, external AC coupling capacitors can be
used as shown in Figure 10. Typically this might be required in hot swappable applications.
Resistors R1 and R2 are required for DC bias of the LVPECL driver. Capacitors C1 and C2 are used as AC
coupling capacitors. During disable mode (C77oEN pin pulled low) those capacitors present infinite impedance to
the DC signal and to the receiving device this looks like a tristated (High-Z) output. Resistors R3, R4, R5 and R6
are used to terminate the transmission line with 50 ohm impedance and to generate DC bias voltage for the
LVPECL receiver. If the LVPECL receiver has an integrated 50 ohm termination and bias source, resistors R3, R4,
R5 and R6 should not be populated.
Figure 10 - Tristatable LVPECL Outputs
Z=50
Z=50
C77oEN
ZL30406
0.1 u
C1
0.1 u
C2
R4
82.5
R6
82.5
R5
127
R3
127
R1
200
R2
200
3.3 V 3.3 V
相關(guān)PDF資料 |
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| ZL30409 | T1/E1 System Synchronizer with Stratum 3 Holdover |
| ZL30410 | CONN HDR INVERSE 30POS 5ROW VERT |
| ZL30410QCC | CONN SOCKET R/A 4R0W 24POS SLD |
| ZL30414 | SONET/SDH Clock Multiplier PLL |
| ZL30414QGC | SONET/SDH Clock Multiplier PLL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZL30406QGG1 | 制造商:Microsemi Corporation 功能描述:IC PB FREE T1/E1 SYS. SYNC+STRATUM 3 H/O 制造商:Microsemi Corporation 功能描述:PB FREE SONET/SDH CLOCK MULTIPLIER PLL - Trays 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC PLL SONET/SDH CLK MULT 64TQFP 制造商:Microsemi Corporation 功能描述:IC PLL SONET/SDH CLK MULT 64TQFP |
| ZL30407 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH Clock Multiplier PLL |
| ZL30407/QCC | 制造商:Microsemi Corporation 功能描述:PLL TRIPLE UP TO 19.44MHZ 80LQFP EP - Trays 制造商:Microsemi 功能描述:PLL TRIPLE UP TO 19.44MHZ 80LQFP EP |
| ZL30407_06 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH Network Element PLL |
| ZL30407QCC | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:SONET/SDH Network Element PLL |
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