ics9248-98 Integrated Device Technology, ics9248-98 Datasheet
ics9248-98
Related parts for ics9248-98
ics9248-98 Summary of contents
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... IOAPIC STOP 0 0 REF(1: CPUCLK_F 0 0 CPUCLK 1 STOP 0 1 SDRAM (11:0) STOP 12 1 SDRAM_F 1 1 PCICLK (4:0) STOP 5 1 PCICLKF ICS9248-98 Pin Configuration 48 VDD1 GND VDD2 GND ...
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... ICS9248-98 Pin Descriptions ...
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... General Description The ICS9248- single chip clock solution for Desktop designs. It provides all necessary clock signals for such a system. Spread spectrum may be enabled through I programming. Spread spectrum typically reduces system EMI by 8dB to 10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9248- ...
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... ICS9248-98 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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... ± ICS9248- ...
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... ICS9248-98 Byte 1: CPU, Active/Inactive Register (1= enable disable ...
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... CLK_STOP asychronous input to the clock synthesizer used to turn off the CPU clocks for low power operation. CLK_STOP# is synchronized by the ICS9248-98. The minimum that the CPU clock is enabled (CLK_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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... ICS9248-98 PCI_STOP# Timing Diagram PCI_STOP asynchronous input to the ICS9248-98 used to turn off the PCICLK clocks for low power operation. PCI_STOP# is synchronized by the ICS9248-98 internally. The minimum that the PCICLK clocks are enabled (PCI_STOP# high pulse least 10 PCICLK clocks. PCICLK clocks are stopped in a low state and started with a full high pulse width guaranteed ...
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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 ICS9248-98 ...
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... ICS9248-98 Absolute Maximum Ratings Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . GND –0 Ambient Operating Temperature . . . . . . . . . . 0°C to +70°C Case Temperature . . . . . . . . . . . . . . . . . . . . . . 115°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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... DDL L CONDITIONS ICS9248-98 MIN TYP MAX UNITS 2 2.4 V 0.17 0.4 V -58 - 1.08 1.6 ns 0. 175 ps 216 250 ps MIN TYP MAX UNITS 2.4 3 ...
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... ICS9248-98 Electrical Characteristics - SDRAM 70° 3.3V +/-5 PARAMETER SYMBOL Output High Voltage V OH3 Output Low Voltage V OL3 Output High Current I OH3 Output Low Current I OL3 1 Rise Time Fall Time Duty Cycle t3 1 Skew window t sk3 1 Propagation Time ...
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... Guaranteed by design, not 100% tested in production. 0313F—08/04/04 = 2.5V +/-5 (unless otherwise stated) DDL L CONDITIONS ICS9248-98 MIN TYP MAX UNITS 2.4 3.03 V 0.23 0.4 V -50 - 1.26 4.0 ns 1. ...
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... ICS9248-98 General Layout Precautions: 1) Use a ground plane on the top layer of the PCB in all areas not used by traces. 2) Make all power traces and vias as wide as possible to lower inductance. Notes: 1 All clock outputs should have series terminating resistor. Not shown in all places to improve ...
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... Lead Free (Optional) Pattern Number ( digit number for parts with ROM code patterns) Package Type F = SSOP Revision Designator (will not correlate with datasheet revision) Device Type Prefix ICS = Standard Device 15 ICS9248-98 In Millimeters In Inches COMMON DIMENSIONS COMMON DIMENSIONS MIN MAX MIN 2.413 2 ...