CDC921 Datasheet, PDF (6/17 Pages) Texas Instruments – 133-MHz CLOCK SYNTHESIZER/DRIVER FOR PC MOTHERBOARDS WITH 3-STATE OUTPUTS

CDC921
133-MHz CLOCK SYNTHESIZER/DRIVER FOR PC MOTHERBOARDS
WITH 3-STATE OUTPUTS
SCAS623 –MAY 27, 1999
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)^†
Supply voltage range, V_DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 4.6 V
Input voltage range, V_I (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 4.6 V
Voltage range applied to any output in the high-impedance state or power-off state,
V_O (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to V_DD + 0.5 V
Current into any output in the low state, I_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 × I_OL
Input clamp current, I_IK (V_I < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 18 mA
Output clamp current, I_OK (V_O < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 50 mA
Operating free-air temperature range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0°C to 85°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† _{Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and}
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATNG
DERATING FACTOR†
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
DL
1315.7 mW
10.53 mW/°C
842.1 mW
684.2 mW
† _{This is the inverse of the traditional junction-to-case thermal resistance (RθJA) and uses a board-mounted device}
at 95°C/W.
recommended operating conditions (see Note 2)
MIN NOM† MAX UNIT
Supply voltage, VDD
3.3 V
2.5 V
3.135
2.375
3.465
V
2.625
High-level input voltage, VIH
2
VDD +
0.3 V
V
Low-level input voltage, VIL
GND –
0.3 V
0.8 V
Input voltage, VI
0
CPUx, CPU_DIV2
VDD V
–12
High-level output current, IOH
APIC
48MHz, REFx
–12
mA
–14
PCIx, PCI_F, 3V66x
–18
CPUx, CPU_DIV2
12
Low-level output current, IOL
APIC
48MHz, REFx
12
mA
9
PCIx, PCI_F, 3V66x
12
Reference frequency, f(XTAL)‡
Crystal frequency, f(XTAL)§
Test mode
Normal mode
130
13.8 14.318
MHz
14.8 MHz
Operating free-air temperature, TA
0
85 °C
NOTE 2: Unused inputs must be held high or low to prevent them from floating.
† _{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 and normal mode. In test mode, XIN can be driven}
externally up to f(XTAL) = 130 MHz. If XIN is driven externally, XOUT is floating.
§ _{This is a series fundamental crystal with fO = 14.31818 MHz.}
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