fs6261-01 ETC-unknow, fs6261-01 Datasheet
fs6261-01
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fs6261-01 Summary of contents
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... Intel and Pentium are registered trademarks of Intel Corporation. Spread spectrum modulation is licensed under US Patent No. 5488627, Lexmark International, Inc. American Microsystems, Inc. reserves the right to change the detail specifications as may be required to permit improvements in the design of its products. 2.0 ® The FS6261- CMOS clock generator IC designed i820 based for high-speed motherboard applications. Two different frequencies can be selected for the CPU clocks via two SEL pins ...
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Table 2: Pin Descriptions Key Analog Input Analog Output Digital Input Digital Output Power/Ground Active-low pin PIN TYPE NAME 53, 54 APIC_0 CK48 ...
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January 2000 Table 3: Actual Clock Frequencies Note: Spread spectrum disabled CLOCK APIC_0:2 CPU_0:3 CPU/2_0:1 PCI_1:7, PCI_F CK66_0:3 (1) CK48 (1) 48MHz USB clock is required to be 167ppm off from 48.000MHz to conform to USB requirements. 3.0 Programming Information ...
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SEL_1, SEL_0 These two input pins can either tristate the output drivers, select the Test Mode frequency, or choose the CPU fre- quencies. Both the SEL_1 and SEL_0 pins have pull-ups that default the CPU output frequency to either ...
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January 2000 Figure 2: CPU_STOP# Timing CPU_ STOP# PCI_F CPU (133MHz) CPU (100MHz) Figure 3: PCI_STOP# Timing PCI_ STOP# PCI_F PCI_1:7 Figure 4: PWR_DWN# Timing PWR_ DWN# PCI_F PCI_1:7 CPU (133MHz) CPU (100MHz) VCO Crystal Oscillator Shaded regions in the ...
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Spread Spectrum Modulation To limit peak EMI emissions, high-speed motherboard designs now require the reduction of the peak harmonic energy contained in the system bus frequencies. A re- duction in the peak energy of a specific frequency can be ...
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January 2000 Compared to the profile limits the modulation slew rate is relatively slow between the limits, allowing the down- stream PLL a chance to reduce the tracking skew. The ability of the downstream PLL to catch up is determined ...
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Electrical Specifications Table 6: Absolute Maximum Ratings Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These conditions represent a stress rating only, and functional operation of the device at these or any ...
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January 2000 Table 8: DC Electrical Specifications Unless otherwise stated, all power supplies = 3.3V ± 10%, no load on any output, and ambient temperature range T characterization data and are not currently production tested to any specific limits. MIN ...
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Table 8: DC Electrical Specifications, continued Unless otherwise stated, all power supplies = 3.3V ± 10%, no load on any output, and ambient temperature range T characterization data and are not currently production tested to any specific limits. MIN and ...
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January 2000 Table 9: AC Timing Specifications Unless otherwise stated, all power supplies = 3.3V ± 10%, no load on any output, and ambient temperature range T characterization data and are not currently production tested to any specific limits. MIN ...
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Table 9: AC Timing Specifications, continued Unless otherwise stated, all power supplies = 3.3V, no load on any output, and ambient temperature T are not currently production tested to any specific limits. MIN and MAX characterization data are PARAMETER CPU_0:3 ...
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January 2000 Table 9: AC Timing Specifications, continued Unless otherwise stated, all power supplies = 3.3V, no load on any output, and ambient temperature T are not currently production tested to any specific limits. MIN and MAX characterization data are ...
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Figure 10: DC Measurement Points V = 2. 0.4V OL 3.3 (device interface) A. 3.3V Clock Interface Figure 11: Timing Diagrams Duty Cycle A. 3.3V Clock Interface Table 10: CPU_0:3, CPU/2_0:1, APIC_0:2 ...
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January 2000 Table 11: REF_0:1, CK48 Clock Outputs High Drive Current (mA) Voltage (V) MIN. TYP. MAX ...
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Package Information Table 13: 56-pin SSOP (0.300") Package Dimensions DIMENSIONS INCHES MILLIMETERS MIN. MAX. MIN. MAX. A 0.095 0.110 2.41 2.79 A 0.008 0.016 0.203 0.406 1 A 0.088 0.092 2.24 2. 0.008 0.0135 0.203 0.343 C ...
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... January 2000 8.0 Ordering Information Table 15: Device Ordering Codes DEVICE NUMBER ORDERING CODE 11565-801 FS6261-01 11565-811 9.0 Revision Information DATE PAGE DESCRIPTION 1/31/00 11-13 Updated characterization data Copyright © 1999, 2000 American Microsystems, Inc. Devices sold by AMI are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. AMI makes no warranty, express, statutory implied or by description, regarding the information set forth herein or regarding the freedom of the described devices from patent infringement ...