SC464 Datasheet | International Microcircuits

Motherboard Clock Chip Approved Product PRODUCT Features T Generates All Essential Clock Signals for the Motherboards T 4V to 7V Operating Supply Range T Supports 8086, 80286, 80386 and 80486 Including S Series ® and Pentium™ Based Designs T Supports ISA, VESA, and PCI Based Designs T Supports GREEN PC Applications T On-Chip Dual Quad Buffers T Integrates CPU Clock and Buffered 14.318 MHz Output T Wide Range of Selectable Output Frequencies Including 80, 66.6, 60, 50, 40, 33.3, 30, 25, 16 and 8 MHz. T Doze Mode for Low Power Consumption T Single, Low Cost Crystal (14.318 MHz Used as Reference Frequency T Smooth and Glitch-Free Switching for Programmable Clock Generator T 50% Duty Cycle T TTL or CMOS patible Outputs T Low, Short and Long Term Jitter T 28 PDIP and 28 Pin SSOP (209 Mil Body) Package Options BLOCK DIAGRAM 14.318 MHz DOZE# LF1 SO S1 S2 ST# B1IN B2IN REF CLOCK GEN REF14 MCLK2 MCLK1 B1OUT1 B1OUT2 B1OUT3 B1OUT4 B2OUT1 B2OUT2 B2OUT3 B2OUT4 IMISC464 eliminates the need for multiple oscillators and generates all the essential clock signals for the Personal puter Motherboards. Supports 8086, 80286, 80386SX, 80386DX, 80486SX, 80486DX, 80486DX2, 80486 S Series ® and Pentium™ based designs. IMISC464 can be used with Green PC, laptop or notebook puters to save power by running the system slower than normal CPU speeds. FREQUENCY TABLE INPUTS S2 S1 S0 000 001 010 011 100 101 110...