參數(shù)資料
型號: MPC905EFR2
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 時鐘產生/分配
英文描述: 50 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO16
封裝: PLASTIC, SOIC-16
文件頁數(shù): 3/5頁
文件大?。?/td> 92K
代理商: MPC905EFR2
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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