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

QT481 AND QT488 SERIES

ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS

2.5Vdc and 3.3Vdc - 32.768kHz

Q-TECH

CORPORATION

QPDS-0008 (Revision A, June 2013) (ECO # 10907)

Description

Q-Tech’s leaded or surface-mount miniature QT481 and

QT488 oscillators consist of an IC 2.5Vdc and 3.3Vdc,

clock square wave generator and a miniature round or

strip AT quartz crystal built in a low profile ceramic

package with gold plated contact terminals.

Features

• Made in the USA

• ECCN: EAR99

• +3.3Vdc or +2.5Vdc operation

• 32.768kHz square wave CMOS output

• Wide operating temperature (*)

• Stand-by function:

High Impedance in stand-by mode oscillator stops

• Excellent AT cut crystal temperature characteristics

• Tristate output option (D)

• Fundamental design

• Able to meet 36,000g shock half-sine

• Fast Start-up time

• RoHS compliant

(*) Available in high temperature for down-hole

application. Call Q-Tech for details

Applications

• Real-time clock driver

• 32.768kHz output crystal modules

Package Information

• Package material: 91% AL

• Lead material: Kovar

• Lead finish:

Gold Plated: 50μ ~ 80μ inches

Nickel Underplate: 100μ ~ 250μ inches

• Weight: 0.6g typ., 3.0g max.

Summary of content (7 pages)

PAGE 1
QT481 AND QT488 SERIES Q-TECH CORPORATION ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS 2.5Vdc and 3.3Vdc - 32.768kHz Description Q-Tech’s leaded or surface-mount miniature QT481 and QT488 oscillators consist of an IC 2.5Vdc and 3.3Vdc, clock square wave generator and a miniature round or strip AT quartz crystal built in a low profile ceramic package with gold plated contact terminals. Features • • • • • • • • • • • • Made in the USA ECCN: EAR99 +3.3Vdc or +2.5Vdc operation 32.
PAGE 2
QT481 AND QT488 SERIES ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS 2.5Vdc and 3.3Vdc - 32.768kHz Q-TECH CORPORATION Electrical Characteristics Parameters +3.3Vdc Output frequency range (Fo) Supply voltage (Vdd) 32.768kHz +3.3Vdc ± 10% Maximum Applied Voltage (Vdd max.) +5Vdc Frequency stability (∆F/∆T) +2.
PAGE 3
QT481 AND QT488 SERIES ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS 2.5Vdc and 3.3Vdc - 32.768kHz Q-TECH CORPORATION Package Outline and Pin Connections - Dimensions are in inches (mm) QT481 QT482 0.276 ± .006 4 0.276 ± .006 (4X) R 0.20 (R .008) (7.0 ± 0.2) 1 0.276 ± .006 (4X) R 0.20 (7.0 ± 0.2) 4 0.197 ± .006 2 4 1 0.197 ± .006 (5.00 ± 0.15) (5.08 ± 0.2) 0.028 (0.72) 0.200±.005 0.008 (0.20) 0.040 (1.02) (5.80±0.13) 3 P/N FREQ. D/C S/N 0.197 ± .006 (5.00 ± 0.15) 1 2 0.2±.008 (5.
PAGE 4
QT481 AND QT488 SERIES ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS 2.5Vdc and 3.3Vdc - 32.768kHz Q-TECH CORPORATION Ordering Information (Sample part number) QT488LD10M-32.768kHz Q T 4 88 L D 10 M - 32.768kHz Solder Dip Option: T = Standard S = Solder Dip (*) G = Solder Dip (*) Ultra-Low Current Real Time Clock Oscillator Package: (See page 3) Logic & Supply Voltage: L = LVHCMOS +3.3V N = LVHCMOS +2.
PAGE 5
QT481 AND QT488 SERIES Q-TECH CORPORATION Output Waveform (Typical) ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS 2.5Vdc and 3.3Vdc - 32.768kHz Test Circuit Typical test circuit for CMOS logic + mA 4 + Vdc + Power supply - - Output 3 QT88 0.1µF or 1 2 0.
PAGE 6
QT481 AND QT488 SERIES ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS 2.5Vdc and 3.3Vdc - 32.768kHz Reflow Profile FEEDING (PULL) DIRECTION 1.75±0.1 2.0±0.1 4.0±0.1 Ø1.5 0.3±.005 5°Max P/N FREQUENCY D/C S/N The five transition periods for the typical reflow process are: • Preheat • Flux activation • Thermal equalization • Reflow • Cool down Embossed Tape and Reel Information For QT488 9.271 24.0±0.3 CORPORATION 11.
PAGE 7
QT481 AND QT488 SERIES ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS 2.5Vdc and 3.3Vdc - 32.768kHz Q-TECH CORPORATION ECO 10907 Revision History REV - A Initial Release REVISION SUMMARY Change Package Material from 90% to 91% Add Lead Free Tinning to Solder Dip Option Add Code 7 to Frquency vs. Temperature Code table Add document number to footer PAGE 1 4 All DATE 10/26/2010 6/13/2013 Q-TECH Corporation - 10150 W.