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參數(shù)資料
| 型號： | MPC980FA |
| 廠商： | MOTOROLA INC |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 66 MHz, PROC SPECIFIC CLOCK GENERATOR, PQFP52 |
| 封裝： | PLASTIC, LQFP-52 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大小： | 133K |
| 代理商： | MPC980FA |
MPC980
MOTOROLA
ECLinPS and ECLinPS Lite
DL140 — Rev 3
4
DC CHARACTERISTICS (TA = 0° to 70°C)
Symbol
Characteristic
Min
Typ
Max
Unit
Condition
VCC
Power Supply Voltage
3.3–5%
3.3
3.3+5%
V
VIL
Input LOW Voltage
0.3VCC
V
VIH
Input HIGH Voltage
0.7VCC
VCC
V
VOH
Output HIGH Voltage
VCC –0.4
V
–20mA (Note 1.)
VOL
Output LOW Voltage
0.4
V
+20mA (Note 1.)
CIN
Input Capacitance
4.5
pF
CPD
Power Dissipation Capacitance
25
pF
ICC
Quiescent Supply Current
190
mA
ICCA
PLL Supply Current
20
mA
1. Output can drive two series terminated 50
transmission lines or a single 50 line terminated 50 into VCC/2.
AC CHARACTERISTICS (TA = 0° to 70°C, VCC = 3.3V ±5%)
Symbol
Characteristic
Min
Typ
Max
Unit
Condition
fXtal
Input Crystal Frequency
14.31818
MHz
fmax
Maximum Output Frequency
QP
QPCI
66
33
MHz
tdc
Output Duty Cycle
tCYCLE/2
–1000
tCYCLE/2
±500
tCYCLE/2
+1000
ps
tjitter
Cycle–to–Cycle Jitter
66/33MHz
(Peak–to–Peak)
60/30MHz
50/25MHz
±150
±200
±250
ps
tskew
Output–to–Output Skew
QP to QP
QPCI to QPCI
QP to QPCI
350
500
ps
Rising Edges Only;
Dly_PCI = 0
tdelay
Time Delay
QP to QPCI
2
1
4fQP
1
4fQP
) 1
ns
Dly_PCI = 1
tr, tf
Output Rise/Fall Time
0.05
0.8
ns
1.0 to 1.8V
tLOCK
PLL Lock Time
10
ms
tPZL, tPZH
Output Enable Time
3
10
ns
50
to VCC/2
tPLZ, tPHZ
Output Disable Time
4
11
ns
50
to VCC/2
APPLICATIONS INFORMATION
Using the On–Board Crystal Oscillator
The MPC980 features an on–board crystal Oscillator to
allow for seed clock generation as well as final distribution.
The on–board Oscillator is completely self contained so that
the only external component required is the crystal. As the
Oscillator is somewhat sensitive to loading on its inputs the
user is advised to mount the crystal as close to the MPC980
as possible to avoid any board level parasitics. To facilitate
co–location surface mount crystals are recommended, but
not required.
The Oscillator circuit is a series resonant circuit as
opposed to the more common parallel resonant circuit, this
eliminates the need for large on–board capacitors. Because
the design is a series resonant design for the optimum
frequency accuracy a series resonant crystal should be used
(see specification table below). Unfortunately most off the
shelf crystals are characterized in a parallel resonant mode.
However a parallel resonant crystal is physically no different
than a series resonant crystal, a parallel resonant crystal is
simply a crystal which has been characterized in its parallel
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| MPC9817SD | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 FSL 1-5 PwrQUICC/Pwr PC Clk Gen, 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 |
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