- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9021 > MPC9658ACR2 (IDT, Integrated Device Technology Inc)IC PLL CLK GEN 1:10 3.3V 32-LQFP PDF資料下載
參數(shù)資料
| 型號： | MPC9658ACR2 |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PLL CLK GEN 1:10 3.3V 32-LQFP |
| 標準包裝： | 2,000 |
| 類型： | PLL 時鐘發(fā)生器 |
| PLL： | 帶旁路 |
| 輸入： | LVPECL |
| 輸出： | LVCMOS |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:10 |
| 差分 - 輸入:輸出： | 是/無 |
| 頻率 - 最大： | 250MHz |
| 除法器/乘法器： | 是/無 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-LQFP |
| 供應(yīng)商設(shè)備封裝： | 32-TQFP（7x7） |
| 包裝： | 帶卷 (TR) |
MPC9658 REVISION 6 JANUARY 8, 2013
8
2013 Integrated Device Technology, Inc.
MPC9658 Data Sheet
3.3V 1:10 LVCMOS PLL CLOCK GENERATOR
Figure 6. Single versus Dual Transmission Lines
The waveform plots in Figure 7 show the simulation
results of an output driving a single line versus two lines. In
both cases the drive capability of the MPC9658 output buffer
is more than sufficient to drive 50
transmission lines on the
incident edge. Note from the delay measurements in the
simulations a delta of only 43 ps exists between the two
differently loaded outputs. This suggests that the dual line
driving need not be used exclusively to maintain the tight
output-to-output skew of the MPC9658. The output waveform
in Figure 7 shows a step in the waveform. This step is caused
by the impedance mismatch seen looking into the driver. The
parallel combination of the 36
series resistor plus the
output impedance does not match the parallel combination of
the line impedances. The voltage wave launched down the
two lines will equal:
VL =VS (Z0 (RS+R0 +Z0))
Z0 =50 || 50
RS =36 || 36
R0 =14
VL = 3.0 (25 (18+14+25)
=1.31 V
At the load end the voltage will double, due to the near
unity reflection coefficient, to 2.6 V. It will then increment
towards the quiescent 3.0 V in steps separated by one round
trip delay (in this case 4.0 ns).
Figure 7. Single versus Dual Waveforms
Since this step is well above the threshold region it will not
cause any false clock triggering. However, designers may be
uncomfortable with unwanted reflections on the line. To better
match the impedances when driving multiple lines, the
situation in Figure 8 should be used. In this case, the series
terminating resistors are reduced such that, when the
parallel combination is added to the output buffer impedance,
the line impedance is perfectly matched.
Figure 8. Optimized Dual Line Termination
Figure 9. PCLK MPC9658 AC Test Reference
14
In
MPC958
Output
Buffer
RS = 36
ZO = 50
OutA
14
In
MPC958
Output
Buffe
RS = 36
ZO = 50
OutB0
RS = 36
ZO = 50
OutB1
Time (ns)
Volta
ge
(V)
3.0
2.5
2.0
1.5
1.0
0.5
0
2
4
6
8
10
12
14
OutB
tD = 3.9386
OutA
tD = 3.8956
In
14
MPC958
Output
Buffe
RS = 22
ZO = 50
RS = 22
ZO = 50
14
+ 22 || 22 = 50 || 50
25
= 25
Pulse
Generator
Z = 50
RT = 50
ZO = 50
RT = 50
ZO = 50
MPC9658 DUT
VTT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| GTC01R-20-27S | CONN RCPT 14POS INLINE W/SCKT |
| MS3114E16-99SW | CONN RCPT 23POS JAM NUT W/SCKT |
| SL28PCIE26ALI | IC CLOCK PCIE GEN3/2 32QFN |
| VI-234-MW-F3 | CONVERTER MOD DC/DC 48V 100W |
| MS3114E16-99S | CONN RCPT 23POS JAM NUT W/SCKT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPC9658FA | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 2.5 3.3V 250MHz Clock Generator RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MPC9658FAR2 | 制造商:Integrated Device Technology Inc 功能描述:PLL Clock Driver Single 32-Pin LQFP T/R 制造商:Integrated Device Technology Inc 功能描述:MPC9658FAR2 - Tape and Reel |
| MPC96877VK | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 DDR2 PLL RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MPC96877VKR2 | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 DDR2 PLL RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MPC970 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:LOW VOLTAGE PLL CLOCK DRIVER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。