2
ICS9250-28
The ICS9250-28 is part of a two chip clock solution for 810/810E and 815 type chipset. Combined with the
ICS9112-17, the ICS9250-28 provides all necessary clock signals for such a system.
Spread spectrum may be enabled through I
2
C programming. Spread spectrum typically reduces EMI by 8dB to 10
dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The
ICS9250-28 employs a proprietary closed loop design, which tightly controls the percentage of spreading over
process and temperature variations.
General Description
Pin Configuration
REBMUNNIPEMANNIPEPYTNOITPIRCSED
1CIPAOITUO.zHM3.33tagninnurtuptuokcolcV5.2
65,2LDDVRWPCIPAOI&UPCrofylppusrewopV5.2
4
1SFNIytilanoitcnuftuptuolla,ycneuqerfUPCsenimreteD.niptceleSnoitcnuF
0FERTUO.tuptuokcolcecnereferzHM813.41,V3.3
,52,02,41,9,5
94,44,04,53,13
DDVRWPylppusrewopV3.3
61XNI
kcabdeefdna)Fp33(pacdaollanretnisah,tupnilatsyrC
2Xmorfrotsiser
72XTUO
daollanretnisaH.zHM813.41yllanimon,tuptuolatsyrC
)Fp33(pac
,91,71,31,8,3
,93,43,03,42
55,25,84,34
DNGRWPylppusV3.3rofsnipdnuorG
01,11,21)0:2(66V3TUOBUHrofstuptuokcolczHM66dexiFV3.3
81,82)0,2(SFNI
.ytilanoitcnuftuptuolla,ycneuqerfUPCsenimreteD.sniptceleSnoitcnuF
.3egapnoelbatytilanoitcnuFotreferesaelP
51,61]0:1[KLCICPTUOstuptuokcolcICPV3.3
12#DPNI
otniecivedehtnwodrewopotdesuniptupniwolevitcasuonorhcnysA
dnaOCVehtdnadelbasideraskcolclanretniehT.etatsrewopwola
ebtonlliwnwodrewopehtfoycnetalehT.deppotseralatsyrceht
.sm3nahtretaerg
22KLCSNIIfonipkcolC
2
tnarelotV5yrtiucricC
32ATADSO/IIrofnipataD
2
tnarelotV5yrtiucricC
72,620_zHM84TUO.stuptuokcolczHM84dexiFV3.3
,63,33,23,92
,24,14,83,73
15,05,74,64,54
MARDS
)0:21(
TUO
ffodenrutebnacstuptuoMARDSllA.zHM001gninnurtuptuoV3.3
Ihguorht
2
C
35,45)0:1(KLCUPCTUO
gnidnepedzHM331rozHM001,zHM66.tuptuokcolcsubtsoHV5.2
.snip)0:2(SFno
