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参数资料
| 型号： | IMISG570CYB |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封装： | SSOP-48 |
| 文件页数： | 2/14页 |
| 文件大小： | 176K |
| 代理商： | IMISG570CYB |
SG570
I
2C Frequency Clock Generator w/ EMI Reduction Spread Spectrum Technology
for Pentium Processor Based Designs.
Preliminary
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
Rev.1.1
3/23/98
MILPITAS, CA 95035. TEL: 408-263-6300. FAX 408-263-6571
Page 10 of 14
SWITCHING CHARACTERISTICS
Characteristic
Symbol
Min
Typ
Max
Units
Conditions
Output Duty Cycle
-
45
50
55
%
Measured at 1.5V
CPU to PCI Offset
tOFF
1
-
4
ns
15 pf Load Measured at 1.5V
Buffer out Skew All CPU
and PCI Buffer Outputs
tSKEW
-
250
ps
15 pf Load Measured at 1.5V
Period Adjacent Cycles
P
-
+250
ps
-
Jitter Spectrum
20 dB
Bandwidth from Center
BWJ
500
KHz
Overshoot/Undershoot
Beyond Power Rails
Vover
-
1.5
V
22 ohms @ source of 8 inch PCB run
to 15 pf load
Ring Back Exclusion
VRBE
0.7
2.1
V
note1
VDD = VDDQ3 =3.3V
±5%, VDDQ2 = 2.5V±5% , TA = 0C to +70C
note 1: Ring Back must not enter this range.
TYPE 1 BUFFER CHARACTERISTICS FOR CPUCLK(0:3)
Characteristic
Symbol
Min
Typ
Max
Units
Conditions
Pull-Up Current
IOH
-91
-131
-183
mA
Vout = 1.0 V
Pull-Up Current
IOH
-43
-62
-87
mA
Vout = 2.0 V
Pull-Down Current
IOL
83
119
167
mA
Vout = 1.2 V
Pull-Down Current
IOL
26
38
53
mA
Vout = 0.3 V
Rise/Fall Time Min
Between 0.4 V and 2.0 V
TRFmin
0.4
-
nS
10 pF Load
Rise/Fall Time Max
Between 0.4 V and 2.0 V
TRFmax
-
2.0
nS
20 pF Load
VDD = VDDQ3 =3.3V
±5%, VDDQ2 = 2.5V±5% , TA = 0C to +70C
TYPE 2 BUFFER CHARACTERISTICS FOR IOAPIC
Characteristic
Symbol
Min
Typ
Max
Units
Conditions
Pull-Up Current
IOH
-91
-131
-183
mA
Vout = 1.0 V
Pull-Up Current
IOH
-43
-62
-87
mA
Vout = 2.0 V
Pull-Down Current
IOL
83
119
167
mA
Vout = 1.2 V
Pull-Down Current
IOL
26
38
53
mA
Vout = 0.3 V
Rise/Fall Time Min Between 0.4 V and 2.0 V
TRFmin
0.4
-
nS
10 pF Load
Rise/Fall Time Max Between 0.4 V and 2.0 V
TRFmax
-
1.9
nS
20 pF Load
VDD = VDDQ3 =3.3V
±5%, VDDQ2 = 2.5V±5% , TA = 0C to +70C
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