W254B Datasheet, PDF (7/16 Pages) SpectraLinear Inc – 133MHz Spread Spectrum FTG for Mobile Pentium® III Platforms

W254B
Table 9. W254B Maximum Allowed Current
W254B
Condition
Powerdown Mode
(PWR_DWN# = 0)
Full Active 66 MHz
FS1:0 = 00 (PWR_DWN# =1)
Full Active 100 MHz
FS1:0 = 01 (PWR_DWN# =1)
Full Active 133 MHz
FS1:0 = 11 (PWR_DWN# =1)
Max. 2.5V supply consumption
Max. discrete cap loads,
V_DDQ2 = 2.625V
All static inputs = V_DDQ3 or V_SS
< 1 mA
70 mA
100 mA
100 mA
Max. 3.3V supply consumption
Max. discrete cap loads
V_DDQ3 = 3.465V
All static inputs = V_DDQ3 or V_SS
< 1 mA
280 mA
280 mA
280 mA
Notes:
4. Once the PWR_DWN# signal is sampled LOW for two consecutive rising edges of CPU, clocks of interest will be held LOW on the next HIGH-to-LOW transition.
5. PWR_DWN# is an asynchronous input and metastable conditions could exist. This signal is synchronized inside W254B.
6. The shaded sections on the SDRAM, REF, and USB clocks indicate “Don’t Care” states.
7. Diagrams shown with respect to 100 MHz. Similar operation when CPU is 66 MHz.
Rev 1.0, November 20, 2006
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