MB88154A Ver la hoja de datos (PDF) - Cypress Semiconductor
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MB88154A Datasheet PDF : 24 Pages
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MB88154A
■ AC Characteristics
(Ta = −40 °C to + 85 °C, VDD = 3.3 V ± 0.3 V, VSS = 0.0 V)
Parameter
Symbol
Pin
Conditions
Value
Unit
Min
Typ
Max
Oscillation frequency
Input frequency
Output frequency
Output slew rate
fx
XIN,
Fundamental oscillation
16.6
⎯
XOUT
3rd over-tone oscillation
40
⎯
fin
XIN
MB88154A-103/113
16.6
⎯
MB88154A-112
33
⎯
fOUT
CKOUT,
MB88154A-103/113
16.6
⎯
REFOUT
MB88154A-112
33
⎯
SR
CKOUT,
0.4 V to 2.4 V
0.3
⎯
REFOUT load capacitance 15 pF
40
MHz
48
40
MHz
67
40
MHz
67
2.0
V/ns
Output clock duty cycle
tDCC
CKOUT
tDCR
REFOUT
1.5 V
1.5 V
40
⎯
60
%
tDCI − 10*
⎯
tDCI + 10*
%
Modulation frequency
(Number of input clocks
per modulation)
fMOD (nMOD) CKOUT
MB88154A-103/113
MB88154A-112
fin/2640
(2640)
fin/4400
(4400)
fin/2280
(2280)
fin/3800
(3800)
fin/1920
(1920)
fin/3200
(3200)
kHz
(clks)
Lock-Up time
Cycle-cycle jitter
tLK
CKOUT
⎯
⎯
2
5
ms
tJC
CKOUT No load capacitance,
⎯
⎯
100 ps-rms
Ta = +25 °C, VDD = 3.3 V
* : Duty of the REFOUT output is guaranteed only for the following A and B because it depends on tDCI of input clock duty.
A. Resonator : When resonator is connected with XIN and XOUT and oscillates normally.
B. External clock input : The input level is Full - swing (VSS − VDD).
<Definition of modulation frequency and number of input clocks per modulation>
fout (Output frequency)
Modulation wave form
t
fMOD (Min)
fMOD (Max)
Clock count Clock count t
nMOD (Max)
nMOD (Min)
MB88154A contains the modulation period to realize the efficient EMI reduction.
The modulation period fMOD depends on the input frequency and changes between fMOD (Min) and fMOD (Max) .
Furthermore, the average value of fMOD equals the typical value of the electrical characteristics.
Document Number: 002-08252 Rev. *B
Page 12 of 23
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