Integrated Circuit Systems, Inc. Addendum to ICS5342 Data Sheet In order to guarantee proper VCO startup on when using an external crystal device, a 750 Ohm pull up resistor must be inserted between Xout (Pin 49) and Vcc (+5 VDC)" NOTE: This pull up resistor provides for correct VCO start-up ICS5342ad 02/09/98 ICS reserves the right to make changes in the device data identified in this publication without further notice. ICS advises its customers to obtain the latest version of all device data to verify that any information being relied upon by the customer is current and accurate.