MK3754

I C R O C LOC K Description The MK3754 is ICS/Microclock’s lowest cost, low jitter, high performance 3.3 Volt VCXO and PLL clock synthesizer designed to replace expensive 54 MHz VCXOs. The on-chip Voltage Controlled Crystal Oscillator accepts a 0 to 3.3 V input voltage to vary the output clocks by ±100 ppm. Using ICS/Microclock’s patented VCXO and analog/digital Phase-Locked Loop (PLL) techniques, the device uses an inexpensive external 13.5 MHz pullable crystal input to produce a 54 MHz output clock. The MK3754A is a drop-in replacement to the earlier MK3754S. MK3754 Low Cost 54 MHz 3.3 Volt VCXO Features Packaged in 8 pin SOIC 3.3 V only operating voltage Uses an inexpensive 13.500 MHz external crystal On-chip VCXO (patented) with pull range of 200ppm (minimum) VCXO tuning voltage of 0 to 3.3 V 12mA output drive capability at TTL levels Advanced, low power, sub-micron CMOS process The A version is the latest, manufactured in a smaller geometry process. The MK3754A gives a wider pull range than the MK3754S, and so is recommended for all new designs, and cost reductions of existing designs. Block Diagram VIN X1 13.5 MHz pullable crystal X2 Voltage Controlled Crystal Oscillator PLL/Clock Synthesis Circuitry Output Buffer 54MHz 1 Revision 060100 Printed 11/16/00 Integrated Circuit Systems, Inc. 525 Race Street San Jose CA95126 (408) 295-9800 tel www.icst.com MDS 3754 D I C R O C LOC K Pin Assignment MK3754 X1 VDD VIN GND 1 2 3 4 MK3754 Low C...