描述 Description

The MK3235 is the smallest size, lowest power system clock synthesizer available. It is the ideal way to generate clocks for handheld computers, such as PDAs, PICs, 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, 14.318MHz, and serial communications output clocks.

The device has three power down modes for the 14.3MHz, communications, and 32.768kHz clocks.

The MK3235 can save board space and cost even if it only replaces the 32kHz oscillator circuitry and one additional surface mount crystal or oscillator. The extremely low IDD, the ease of surface mounting, and the power down capability are added benefits in using the part.

特性 Features

? Input crystal frequency of 32.768 kHz

? Lowest power solution available

? Lowest profile clock solution where height is critical

? Three output clocks

? 3.3V or 5.0V operation

? Duty cycle of 45/55

? 14.3MHz or 14.3MHz+Comm clock power downs

? Separate battery supply pin for 32 kHz runs to 2V

? IDD less than 4μA when 32 kHz running

? Packaged in 16 pin narrow SOIC