+/+…when timing is critical
C9815C
Low EMI Clock Generator for Intel 133MHz/2DIMM Chipset Systems
Preliminary
In Center Spread mode, the Center frequency remains the same as in the non-spread mode.
Down Spread
Center Spread
Figure 8A
Figure 8B
Spread Spectrum Selection Tables
Spread
%
Spread
%
I²C BYTE5
Bit[7:5]
I²C BYTE5
Bit[7:5]
000
001
010
011
- 0.5
- 0.7
- 1.0
- 0.25
100
101
110
111
± 0.25
± 0.35
± 0.5
+/- 0.125
Table 4A
Table 4B
Maximum Ratings
This device contains circuitry to protect the inputs
against damage due to high static voltages or electric
field; however, precautions should be taken to avoid
application of any voltage higher than the maximum
rated voltages to this circuit. For proper operation, Vin
and Vout should be constrained to the range:
Maximum Input Voltage Relative to VSS: VSS - 0.3V
Maximum Input Voltage Relative to VDD: VDD + 0.3V
Storage Temperature:
Operating Temperature:
Maximum ESD protection
Maximum Power Supply:
-65ºC to + 150ºC
0ºC to +85ºC
2KV
VSS<(Vin or Vout)<VDD
5.5V
Unused inputs must always be tied to an appropriate
logic voltage level (either VSS or VDD).
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.,
MILPITAS, CA 95035, USA TEL: 408-263-6300, FAX 408-263-6571
http://www.imicorp.com
Rev 1.2
4/5/2000
Page 10 of 18
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