MB88161 Fujitsu Media Devices, MB88161 Datasheet - Page 6

• Manufacturer Part Number: MB88161
• Description: Spread Spectrum Clock Generator
• Manufacturer: Fujitsu Media Devices

6
MB88161
BLOCK DIAGRAM
Reference clock
SPRD
XOUT
MLTP
XIN
OE
S0
S1
A glitchless IDAC (current output D/A converter) provides precise modulation,
thereby dramatically reducing EMI.
Multiplication
Output enable
Modulation type setting
Modulation rate setting
Modulation rate setting
4 pF
4 pF
M
N
1
−
1
−
1
−
L
R
f
= 500 kΩ
rate setting
compare
Phase
Power
Down
Reference
clock
Power
Down
MB88161 PLL block
Charge
pump
V
V
DD
SS
conversion
PLL block
Loop filter
V/I
Modulation logic
IDAC
clock output
Modulation
control
Hi-Z
Modulation clock
ICO
Modulation
rate setting
S0, S1
output
OUT