ics9248-141 ETC-unknow, ics9248-141 Datasheet
ics9248-141
Related parts for ics9248-141
ics9248-141 Summary of contents
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... ICS reserves the right to make changes in the device data identified in this publication without further notice. ICS advises its customers to obtain the latest version of all device data to verify that any information being relied upon by the customer is ICS9248-141 48 REF1/FS2* 47 GND 46 CPUCLKT1 45 ...
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... ICS9248-141 Pin Descriptions ...
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... General Description The ICS9248-141 is a main clock synthesizer chip for AMD-K7 based systems with VIA style chipset. This provides all clocks required for such a system. Spread spectrum may be enabled through I This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9248-141 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations ...
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... ICS9248-141 Serial Configuration Command Bitmap Byte0: Functionality and Frequency Select Register (default = ...
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... Note: Don’t write into this register, writing into this register can cause malfunction 5 ICS9248-141 ...
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... ICS9248-141 Absolute Maximum Ratings Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND –0 Ambient Operating Temperature . . . . . . . . . . . . . 0°C to +70°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only and functional operation of the device at these or any other conditions above those listed in the operational sections of the specifications is not implied ...
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... CPU0 OH OL CPUT1 Note 2 Note 2 Note 3 CPU0 between crossing points CPUT1 @ 50% 90,100,133 MHz required for switching, where ICS9248-141 MIN TYP MAX UNITS 2.4 0.4 -22 16 1.6 4.0 1.8 4 500 1000 MIN TYP MAX ...
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... ICS9248-141 Electrical Characteristics - PCICLK 70C 3.3V +/-5 PARAMETER SYMBOL 1 Output Impedance R DSP1B 1 Output Impedance R DSN1B Output High Voltage V OH1 Output Low Voltage V OL1 I Output High Current OH1 I Output Low Current OL1 1 Rise Time Fall Time Duty Cycle ...
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... - ICS9248-141 MIN TYP MAX UNITS 2.4 V 0 1.3 4.0 ns 1.3 4 150 500 ps MIN TYP MAX UNITS ...
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... ICS9248-141 General I The information in this section assumes familiarity with I For more information, contact ICS for an I How to Write: • Controller (host) sends a start bit. • Controller (host) sends the write address D2 • ICS clock will acknowledge • Controller (host) sends a dummy command code • ...
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... The programming resistors should be located close to the series termination resistor to minimize the current loop area more important to locate the series termination resistor close to the driver than the programming resistor. Via to VDD 2K 8.2K Clock trace to load Series Term. Res. Fig ICS9248-141 ...
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... Crystal Notes: 1. All timing is referenced to the Internal CPUCLK (defined as inside the ICS9248-141 device shown, the outputs Stop Low on the next falling edge after PD# goes low asynchronous input and metastable conditions may exist. This signal is synchronized inside this part. ...
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... CPU_STOP asychronous input to the clock synthesizer used to turn off the CPU clocks for low power operation. CPU_STOP# is synchronized by the ICS9248-141. The minimum that the CPU clock is enabled (CPU_STOP# high pulse) is 100 CPU clocks. All other clocks will continue to run while the CPU clocks are disabled. The CPU clocks will always be stopped in a low state and start in such a manner that guarantees the high pulse width is a full pulse ...
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... ICS9248-141 Ordering Information ICS9248yF-141-T Example: ICS XXXX PPP - T Designation for tape and reel packaging Pattern Number ( digit number for parts with ROM code patterns) Package Type Revision Designator (will not correlate with datasheet revision) Device Type (consists digit numbers) Prefix Third party brands and names are the property of their respective owners ...