MB88155 Fujitsu Media Devices, MB88155 Datasheet - Page 14

• Manufacturer Part Number: MB88155
• Description: Spread Spectrum Clock Generator
• Manufacturer: Fujitsu Media Devices

14
MB88155
• AC Characteristics
*1 : Duty of the REFOUT output is guaranteed only for the following A and B because it depends on t
*2 : The modulation clock requires stabilization wait time after the IC is turned on or released from power-down
Oscillation
frequency
Input frequency
Output frequency
Output slew rate
Output clock
duty cycle
Modulation
frequency
Lock-up time*
Cycle-cycle jitter
mode, or after SEL (modulation factor) or ENS (modulation on/off) setting is changed. For the modulation clock
stabilization wait time, assure the maximum value for the lock-up time.
clock duty.
Parameter
A. Resonator input : When resonator is connected with XIN and XOUT, and oscillates normally.
B. External clock input : The input level is Full-swing (V
2
Symbol
SRc
SR
f
f
t
t
MOD
OUT
DCC
DCR
t
t
f
f
LK
JC
in
x
R
REFOUT
REFOUT
REFOUT 1.5 V reference level
CKOUT
CKOUT
CKOUT 1.5 V reference level
CKOUT Input frequency at 24 MHz
CKOUT ⎯
CKOUT
XOUT
XIN,
XIN
Pin
Fundamental oscillation
3
MB88155 − 1x0, 1x2
MB88155 − 1x1, 1x3
MB88155 − 4xx
MB88155 − 1x0, 1x2
MB88155 − 1x1, 1x3
MB88155 − 4xx
MB88155 − 1x0, 1x2
MB88155 − 1x1, 1x3
MB88155 − 4xx
Load capacitance 15 pF,
0.4 V to 2.4 V
Load capacitance 15 pF,
0.4 V to 2.4 V
MB88155 − 1xx
Input frequency
12.5 MHz to 20 MHz,
No load capacitance,
Ta = + 25 °C, V
Standard deviation
MB88155 − 1xx
Input frequency
20 MHz to 50 MHz,
No load capacitance,
Ta = + 25 °C, V
Standard deviation
MB88155 − 4xx
No load capacitance,
Ta = + 25 °C, V
Standard deviation
rd
overtone
Conditions
(Ta = −
DD
DD
DD
SS
= 3.3 V,
= 3.3 V,
= 3.3 V,
σ
σ
σ
40
− V
°C to + 85 °C, V
DD
).
t
DCI
12.5
12.5
12.5
12.5
12.5
12.5
Min
0.4
0.3
40
25
25
25
50
40
− 10*
⎯
⎯
⎯
⎯
⎯
1
DD
= 3.3 V ± 0.3 V, V
Value
32.4
Typ
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
2
t
DCI
Max
150
100
200
4.0
2.0
40
48
25
50
20
25
50
20
25
50
80
60
+ 10*
⎯
5
DCI
SS
of input
1
= 0.0 V)
MHz
MHz
MHz
Unit
V/ns
kHz
ms
ps
ps
ps
%