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参数资料
| 型号： | MPC905DR2 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 50 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO16 |
| 封装： | PLASTIC, SOIC-16 |
| 文件页数： | 3/5页 |
| 文件大小： | 92K |
| 代理商： | MPC905DR2 |
6
MPC905
MOTOROLA ADVANCED CLOCK DRIVERS DEVICE DATA
530
AC CHARACTERISTICS (TA = 0–70°C; VDD = 3.3V ±0.3V)
Symbol
Characteristic
Min
Typ
Max
Unit
Condition
Fmax
Maximum Operating
Using External Crystal
Frequency
Using External Clock Source
–
DC
50
100
MHz
tpw
Output Pulse Width
HIGH (Above 2.0V)
LOW (Below 0.8V)
HIGH (Above 2.0V)
LOW (Below 0.8V)
0.40T1
0.45T2
0.60T1
0.55T2
T = Periods
tper
Output Period
T – 400ps
T = Desired Period
tos
Output-to-Output Skew
Rising Edges
Falling Edges
400
500
ps
tr, tf
Rise/Fall Times (Slew Rate)
1
4
V/ns
Series Terminated
Transmission Lines
tEN
Enable Time
Enable1
Enable2
5
4
ms
Cycles
tDIS
Disable Time
Enable1
Enable2
4
Cycles
Aosc
XTAL_IN to XTAL_OUT Oscillator Gain
6
db
Phase
Loop Phase Shift Modulo 360
° +
30
Degrees
1. Assuming input duty cycle specs from Recommended Operationg Conditions table are met.
2. Assuming external crystal or 50% duty cycle external reference is used.
Figure 1. Crystal Oscillator Interface
(Fundamental)
100
Pin 1
Pin 16
Y1
33.3333MHz
16pF
10pF
C1
C3
Figure 2. Crystal Oscillator Interface
(3rd Overtone)
CTRAP
Pin 1
Pin 16
Y1
11.1111MHz
16pF
10pF
C1
C3
LTRAP
fFUND +
1
2
p LTRAP CTRAP
Table 1. Crystal Specifications
Parameter
Value
Crystal Cut
Fundamental AT Cut
Resonance
Parallel Resonance*
Frequency Tolerance
±75ppm at 25°C
Frequency/Temperature Stability
±150pm 0 to 70°C
Operating Range
0 to 70
°C
Shunt Capacitance
5–7pF
Equivalent Series Resistance (ESR)
50 to 80
Correlation Drive Level
100
W
Aging
5ppm/Yr (First 3 Years)
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