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OVERVIEW

The SM5073 series are VCXO ICs with built-in varicap diode. They use a recently developed negative-resistance switching oscillation circuit, at oscillation startup and during normal oscillation, for both good oscillation startup characteristics and wide pullrange. Furthermore, it employs a CMOS process varicap diode, and also features all the necessary VCXO structure circuit components on a single chip, forming a VCXO with just the connection of an external crystal.

FEATURES

■ 3.0 to 3.6V supply voltage range

■ 10MHz to 60MHz operating frequency (varies with version)

■ Uses negative-resistance switching function

■ Varicap diode built-in

■ Frequency divider built-in (varies with version: fO, fO/2, fO/4, fO/8, fO/16, fO/32)

■ CMOS output level

■ 50 ± 10 output duty

■ 6mA (min) output drive capability

■ 15pF output load capacitance CL

■ Standby function

High impedance in standby mode (oscillator continues running)

■ Package: 8-pin SOP (SM5073××S)

APPLICATIONS

■ VCXO modules

■ Communications application

■ Networking application

■ Broadcasting application