M685 datasheet(7/7 Pages) ICST

Part #	M685

Description	DUAL SAW, SELECTABLE FREQUENCY VCSO

PDF	7 Pages

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Manufacturer	ICST [Integrated Circuit Systems]

Direct Link	http://www.icst.com

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7 / 7 page

M685 Datasheet Rev 0.4 - Errata

Revised 16Nov2004

Integr a t ed Cir cui t S ystems , Inc . ● N e tw or kin g & C o mm un icat ion s ● www. icst.com ● te l (5 08 ) 85 2-5 4 0 0

M685

DUAL SAW, SELECTABLE FREQUENCY VCSO

Integrated

Circuit

Systems, Inc.

Er rata

PRODUCT APPLICATION CAUTION

F_SEL Change During Power-Up Can Affect Output Frequency Accuracy

M685E1

The M685 features an F_SEL input which is used to select the internal VCSO frequency.

The F_SEL input logic level should not be changed while the M685 device is in operation (that is, voltage

is applied to the pin VCC), particularly when the pin VIN (the control voltage input) is above 2.0V.

Changing the F_SEL input logic level during operation may result in an erroneous output frequency.

It is safe to change F_SEL during operation if pin VIN can be held low, or at least below 2.0V.

M685 Datasheet(PDF) 7 Page - Integrated Circuit Systems