CDC950 Datasheet, PDF (6/16 Pages) Texas Instruments – 133-MHz DIFFERENTIAL CLOCK SYNTHESIZER/DRIVER FOR PC MOTHERBOARDS/SERVERS

CDC950
133ĆMHz DIFFERENTIAL CLOCK SYNTHESIZER/DRIVER FOR
PC MOTHERBOARDS/SERVERS
SCAS646B − FEBRUARY 2001 − REVISED OCTOBER 2003
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
DERATING FACTOR†
TA = 70°C
TA = 85°C
POWER RATING ABOVE TA = 25°C POWER RATING POWER RATING
DGG
1400 mW
11.2 mW/°C
900 mW
730 mW
† _{This is the inverse of the traditional junction-to-case thermal resistance (RθJA) and uses a}
board-mounted device at 89°C/W
recommended operating conditions (see Note 4)
MIN NOM‡
MAX UNIT
Supply voltages, VDD, AVDD
High-level input voltage, VIH
Low-level input voltage, VIL
Input voltage, VI
HCLK/HCLK
3.135
2
−0.3
3.3
3.465
V
0.8
VDD + 0.3
−40
CLK33
−18
High-level output current, IOH
3V48/SelA and 3V48/SelB
−14
REFCLK
HCLK/HCLK
−14
mA
0
CLK33
12
Low-level output current, IOL
3V48/SelA and 3V48/SelB
9
REFCLK
9
Reference frequency, f(XIN)^§
Crystal, f(XTAL)¶
Test mode
Normal mode
14
13.8 14.318
MHz
14.8
Operating free-air temperature, TA
0
85 °C
‡ _{All nominal values are measured at their respective nominal VDD values.}
§ _{Reference frequency is a test clock driven on the XIN input during the device test mode or normal mode. In test mode, XIN can be driven externally}
up to f(XIN) = 16 MHz. If XIN is driven externally, XOUT is floating.
¶ _{This is a series fundamental crystal with fo = 14.31818 MHz}
NOTE 4: Unused inputs must be held high or low to prevent them from floating.
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