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参数资料
| 型号： | C9853AT |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封装： | TSSOP-48 |
| 文件页数： | 1/16页 |
| 文件大小： | 145K |
| 代理商： | C9853AT |
+/+
…when timing is critical
C9853
High Performance Pentium
III Clock Generator
Preliminary
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
1.0
4/13/2000
MILPITAS, CA TEL 408-263-6300, FAX 408-263-6571
Page 1 of 16
http://www.imicorp.com
Product Features
Two differential host clocks pairs
One 3V Mref reference clock for memory reference
seeds (separate single ended, but 180 degrees out
of phase)
Three 3V, 66 MHz clocks
Ten 3V, 33 MHz PCI clocks
Two 48 MHz clocks
Two 14.318 MHz reference clocks
Select logic for Differential Swing Control, Test
mode, Hi-Z, Power-down, Spread spectrum, and
limited frequency select
External resistor for current reference
48 Pin SSOP and TSSOP Package
Frequency Selection Table
SEL 133/100
SELA
SELB
CPU(1:2)/
CPU# (1:2)
3Vmref/
3Vmref_b
3V66 (0:2)
PCI (1:10)
48M
(0:1)
Ref (1:2)
0
100 MHz
50 MHz
66.7 MHz
33.3 MHz
48 MHz
14.318 MHz
0
1
105 MHz
52.5MHz
70.0 MHz
35.0 MHz
48 MHz
14.318 MHz
0
1
0
200 MHz
50 MHz
66.7 MHz
33.3 MHz
48 MHz
14.318 MHz
0
1
Hi-Z
1
0
133 MHz
66.7 MHz
33.3 MHz
48 MHz
14.318 MHz
1
0
1
126.7 MHz
63.3 MHz
31.7 MHz
48 MHz
14.318 MHz
1
0
200 MHz
66.7 MHz
33.3 MHz
48 MHz
14.318 MHz
1
XIN/2
XIN/4
XIN/8
XIN/2
XIN
Block Diagram
Pin Configuration
Ref2/MultSel1
VDDR
XIN
XOUT
VSSP
PCI1
PC2
VDDP
PCI3
PCI4
VSSP
PCI5
PCI6
VDDP
PCI7
PCI8
VSSP
PCI9
PCI10
VDDP
Sel100/133
VSSU
48M0/SelA
48M1/SelB
Ref1/MultSel0
VSSR
VDDM
3VMref
3VMref_b
VSSM
Spread#
CPU1
CPU1#
VDDC
CPU2
CPU2#
VSSC
I_Ref
VDD
VSS
PwrDwn#
VDDL
3V66_0
3V66_1
VSSL
3V66_2
VDDL
VDDU
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
OSC
VCO1
VCO2
I_REF
VDDR
Ref1/MultSel0
Ref2/MultSel1
VSSR
Sel1
Sel2
3VMRef
3VMRef_b
VDDC
CPU(1:2)
CPU#(1:2)
VSSC
VDDL
3V66(0:2)
VSSL
VDDP
PCI (1:10)
VSSP
VDDU
48M(0:1)
VSSU
SELA/B
2
XOUT
XIN
SEL#
SEL100/133
SPREAD#
PWRDWN#
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