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參數(shù)資料
| 型號： | MPC9351AC |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 13/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PLL CLOCK DRIVER LV 32-LQFP |
| 標(biāo)準(zhǔn)包裝： | 250 |
| 類型： | PLL 時鐘發(fā)生器 |
| PLL： | 帶旁路 |
| 輸入： | LVCMOS，LVPECL |
| 輸出： | LVCMOS |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 2:9 |
| 差分 - 輸入:輸出： | 是/無 |
| 頻率 - 最大： | 200MHz |
| 除法器/乘法器： | 是/無 |
| 電源電壓： | 2.375 V ~ 3.465 V |
| 工作溫度： | -40°C ~ 85°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： | 托盤 |
| 其它名稱： | 800-2256 MPC9351ACIDT-ND |
MPC9351 REVISION 6 JANUARY 31, 2013
8
2013 Integrated Device Technology, Inc.
MPC9351 Data Sheet
LOW VOLTAGE PLL CLOCK DRIVER
Calculation of Part-to-Part Skew
The MPC9351 zero-delay buffer supports applications
where critical clock signal timing can be maintained across
several devices. If the reference clock inputs (TCLK or PCLK)
of two or more MPC9351 are connected together, the
maximum overall timing uncertainty from the common TCLK
input to any output is:
tSK(PP) = t() + tSK(O) + tPD, LINE(FB) + tJIT() CF
This maximum timing uncertainty consist of 4 components:
static phase offset, output skew, feedback board trace delay
and I/O (phase) jitter:
Figure 4. MPC9351 Maximum Device-to-Device Skew
Due to the statistical nature of I/O jitter, a RMS value (1
)
is specified. I/O jitter numbers for other confidence factors
(CF) can be derived from Table 10.
The feedback trace delay is determined by the board
layout and can be used to fine-tune the effective delay
through each device. In the following example calculation, an
I/O jitter confidence factor of 99.7% (
3) is assumed,
resulting in a worst case timing uncertainty from input to any
output of –251 ps to 351 ps relative to TCLK (VCC = 3.3 V and
fVCO = 400 MHz):
tSK(PP)=[–50 ps...150 ps] + [–150 ps...150 ps] +
[(17ps –3)...(17ps 3)] + tPD, LINE(FB)
tSK(PP)=[–251 ps...351 ps] + tPD, LINE(FB)
Above equation uses the maximum I/O jitter number
shown in the AC characteristic table for VCC = 3.3 V (17 ps
RMS). I/O jitter is frequency dependant with a maximum at
the lowest VCO frequency (200 MHz for the MPC9351).
Applications using a higher VCO frequency exhibit less I/O
jitter than the AC characteristic limit. The I/O jitter
a smaller I/O jitter number at the specific VCO frequency,
resulting in tighter timing limits in zero-delay mode and for
part-to-part skew (tSK(PP)).
Figure 5. Maximum I/O Jitter (RMS)
versus Frequency for VCC = 2.5 V
Figure 6. Maximum I/O Jitter (RMS)
versus Frequency for VCC = 3.3 V
Power Supply Filtering
The MPC9351 is a mixed analog/digital product. Its analog
circuitry is naturally susceptible to random noise, especially if
this noise is seen on the power supply pins. Noise on the
VCCA (PLL) power supply impacts the device characteristics,
for instance, I/O jitter. The MPC9351 provides separate
power supplies for the output buffers (VCC) and the
phase-locked loop (VCCA) of the device. The purpose of this
design technique is to isolate the high switching noise digital
outputs from the relatively sensitive internal analog
phase-locked loop. In a digital system environment, where it
is more difficult to minimize noise on the power supplies, a
second level of isolation may be required. The simple but
effective form of isolation is a power supply filter on the VCCA
pin for the MPC9351. Figure 7 illustrates a typical power
supply filter scheme. The MPC9351 frequency and phase
stability is most susceptible to noise with spectral content in
Table 10. Confidence Factor CF
CF
Probability of Clock Edge within the Distribution
1
0.68268948
2
0.95449988
3
0.99730007
4
0.99993663
5
0.99999943
6
0.99999999
tPD,LINE(FB)
tJIT()
+tSK(O)
—t()
+t()
tJIT()
+tSK(O)
tSK(PP)
Max. skew
TCLKCommon
QFBDevice 1
Any QDevice 1
QFBDevice2
Any QDevice 2
30
25
20
15
10
5
0
75
225
250
275
300
325
VCO Frequency [MHz]
t JIT(
)
[ps]
ms
Max. I/O Jitter versus Frequency
350
375
400
30
25
20
15
10
5
0
75
225
250
275
300
325
VCO Frequency [MHz]
t JI
T(
)
[ps]
ms
Max. I/O Jitter versus Frequency
350
375
400
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPC9351ACR2 | 功能描述:時鐘驅(qū)動器及分配 FSL1-9 LVCMOS/LVPECL LVCMOS PLL Clk Gen RoHS:否 制造商:Micrel 乘法/除法因子:1:4 輸出類型:Differential 最大輸出頻率:4.2 GHz 電源電壓-最大: 電源電壓-最小:5 V 最大工作溫度:+ 85 C 封裝 / 箱體:SOIC-8 封裝:Reel |
| MPC9351D | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Low Voltage PLL Clock Driver |
| MPC9351FA | 功能描述:時鐘驅(qū)動器及分配 2.5 3.3V 200MHz Clock Generator RoHS:否 制造商:Micrel 乘法/除法因子:1:4 輸出類型:Differential 最大輸出頻率:4.2 GHz 電源電壓-最大: 電源電壓-最小:5 V 最大工作溫度:+ 85 C 封裝 / 箱體:SOIC-8 封裝:Reel |
| MPC9351FAR2 | 功能描述:IC PLL CLOCK DRIVER LV 32-LQFP RoHS:否 類別:集成電路 (IC) >> 時鐘/計(jì)時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:PLL 時鐘發(fā)生器 PLL:帶旁路 輸入:LVCMOS，LVPECL 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:2:11 差分 - 輸入:輸出:是/無 頻率 - 最大:240MHz 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) |
| MPC9352 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:3.3V / 2.5V 1:11 LVCMOS ZERO DELAY CLOCK GENERATOR |
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