Integrated Circuit Systems ICS9131
The ICS9131 offers a tiny footprint solution for generating a selectable CPU clock from a 32.768 kHz crystal. The device allows a variety of microprocessors to be clocked by changing the state of address lines FS0, FS1, and FS2. The ICS9131 is the ideal solution for replacing high speed oscillators and for reducing clock speeds to save power in computers.GENERAL DESCRIPTION
The device provides smooth, glitch-free frequency transitions so that the CPU can continue to operate during slow down or speed up. The rate of frequency change makes the ICS9131 compatible with all 386DX, 386SX, 486DX, 486DXZ, 486SX and Pentium™ microprocessors. The ICS9131 is driven from a single 32.768 kHz crystal. The only external components required are the crystal and a 10M ohm resistor. The device generates the 14.318 MHz system clock, eliminating the need for a 14.318 MHz crystal. HighPerformance applications may require high speed clock termination components.FEATURES
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● Single 32.768 kHz crystal generates system clock and selectable CPU clock Generates CPU clocks from 8 MHz to 100 MHz. Operates from 3.3V or 5.0V supply Operates up to 66 MHz at 3.3V Separate VDD for 32 kHz clock enables it to run from battery STOPCLK feature allows for a glitch-free turn-on and Pen-turn-off of the CPU clock to static processors Output enable tristates outpu...