Q-tech Q-Tech's Manual de usuario descargar pdf

Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com

QT581 AND QT588 SERIES

ULTRA-LOW CURRENT, HIGH-TEMPERATURE REAL TIME CLOCK OSCILLATORS

2.5Vdc and 3.3Vdc - 32.768kHz

Q-TECH

CORPORATION

QPDS-0007 (Rev A, January 2013) (ECO #10336)

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Description

Q-Tech’s high temperature real time clock oscillators

consist of a source clock square wave generator and a

miniature round or strip quartz crystal built in a low

profile hermetically ceramic package with gold plated

contact terminals.

The device provides a precision clock for timekeeping for

most down-hole electronic applications by using AT or IT

cut quartz crystals. The design and construction of the

QT581 and QT588 series will make accuracy-

improvement techniques over the traditional RTC with a

32.768kHz quartz tuning-fork crystal, which due to its

parabolic characteristics that do not provide much

accuracy over a wide temperature range. As a result, there

is a gaining or losing up to seconds per day and tens of

minutes per year.

The device is built using high temperature materials and

processes suitable for long life and highest reliability.

Features

• Made in the USA

• ECCN: EAR99

• +3.3Vdc and +2.5Vdc operation

• 32.768kHz square wave CMOS output

• Wide operating temperature -55°C to +200°C

• Tight frequency stability (±40ppm to ±250ppm)

• Ultra-low current suitable for battery operation

• Excellent AT and IT cut crystal temperature characteristics

• Tristate output standard

• Fundamental design

• Fast start-up time

• Hermetically sealed package

• 100% testing over temperature

• RoHS compliant

Applications

• Real-time clock driver

• 32.768kHz output crystal modules

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