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CF5019

Nippon Precision Circuits
Part Number CF5019
Manufacturer Nippon Precision Circuits
Description 3rd Overtone Crystal Oscillator Module ICs
Published Apr 25, 2009
Detailed Description CF5019 series High-Frequency, 3rd Overtone Crystal Oscillator Module ICs www.datasheet4u.com OVERVIEW The CF5019 series...
Datasheet PDF File CF5019 PDF File

CF5019
CF5019

Overview
CF5019 series High-Frequency, 3rd Overtone Crystal Oscillator Module ICs www.
datasheet4u.
com OVERVIEW The CF5019 series are high-frequency, 3rd overtone crystal oscillator module ICs.
They incorporate an oscillator circuit and an output buffer that operate at high frequency on a single chip.
The oscillator circuit employs CMOS inverters and a built-in damping resistor RD, reducing the crystal current compared with existing devices.
The damping resistor RD is fabricated using NPC’s unique high-precision thin-film resistor technology, which suppresses oscillator characteristic variations due to changes in temperature and voltage to a minimum.
The CF5019 series can be utilized to construct stable, high-frequency, 3rd overtone crystal oscillators.
FEATURES I I I I I I RD built-in to reduce crystal current in the oscillator circuit 2.
25 to 3.
6V operating supply voltage range Recommended operating frequency range (varies with version) • 2.
5V operation: 60 to 155MHz • 3.
0V operation: 60 to 170MHz – 40 to 85°C operating temperature range Oscillator capacitors with excellent frequency response built-in Feedback resistors with good temperature characteristics built-in I I I I I I I I Standby function • High impedance in standby mode, oscillator stops Low standby current • Power-saving pull-up resistor built-in Oscillation detector function CMOS output duty level (1/2VDD) 50 ± 5% output duty (at 1/2VDD) 30pF output load (3.
3V operation) Molybdenum-gate CMOS process Chip form (CF5019AL×) APPLICATIONS I Crystal oscillator modules (3rd overtone oscillation) SERIES CONFIGURATION Recommended operating frequency range*1 [MHz] gm ratio 2.
5V operation 3.
0V operation CF5019ALA CF5019ALB CF5019ALC CF5019ALD CF5019ALE 60 to 80 70 to 115 105 to 135 110 to 155 90 to 125 60 to 90 80 to 125 115 to 145 135 to 170 95 to 135 0.
6 0.
8 1.
0 1.
0 0.
8 Oscillator circuit constants Built-in capacitance Feedback Damping resistance resistance CG [pF] CD [pF] Rf [kΩ] RD [Ω] 4 3 1 1 2 7 3 3 5 7 ...


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