描述 Description

The MK3230 is the smallest size, lowest power system clock synthesizer available. It is the ideal way to generate clocks for portable computers, PDAs, and other devices where low power is required. Using analog Phase-Locked Loop (PLL) techniques, the device operates from a single 32.768 kHz crystal to produce the 32.768kHz, CPU, system, keyboard controller, and floppy (or super I/O) controller output clocks.

? Packaged in 16 pin narrow (0.150”) SOIC

? Input crystal frequency of 32.768 kHz

? Lowest power solution available

? Lowest profile clock solution where height is critical

? Output clock frequencies up to 80 MHz

? Five output clocks

? 3.3V or 5.0V operation

? Duty cycle of 45/55

? Seven selectable CPU frequencies

? CPU and peripheral clock power downs

? Separate battery supply pin for 32 kHz

? IDD less than 5μA when 32 kHz running

? Available with either 12MHz (-01) or 16MHz (-02) keyboard clock output

? 14.3MHz output is not suitable for driving PLL for CRT. Will drive all other functions

? 32kHz crystals require long startup (>500ms) Features