Q-Tech QT488 User Manual

Q-TECH

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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

QT481 AND QT488 SERIES

ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS

2.5Vdc and 3.3Vdc - 32.768kHz

(*) 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% AL2O

• Lead material: Kovar

• Lead finish:

Gold Plated: 50μ ~ 80μ inches

Nickel Underplate: 100μ ~ 250μ inches

• Weight: 0.6g typ., 3.0g max.

Q-T ECH Co rpo rat ion - 1 015 0 W. J efferson Boulevard, Culver City 90232 - Tel: [phone] - Fax: [phone] - www.q-t e c h.c om

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

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Q-TECH

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Electrical Characteristics

Parameters +3.3Vdc +2.5Vdc

QT481 AND QT488 SERIES

ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS

2.5Vdc and 3.3Vdc - 32.768kHz

Output frequency range (Fo)

Supply voltage (Vdd)

Maximum Applied Voltage
(Vdd max.)

Frequency stability (∆F/∆T) See Ordering Information

Operating temperature (Topr) See Ordering Information

Storage temperature (Tsto) -55ºC to + 125ºC

Operating supply current
(Idd) (No Load)

Symmetry
(50% of ouput waveform)

Rise and Fall times
(Tr, Tf betweeen 10% and 90% of output waveform)

Output Load

Start-up time (Tstup) 10ms max.

Output voltage (Voh/Vol)

Output Current (Ioh/Iol)

Enable/Disable function Pin 1

+3.3Vdc ± 10%

0.42 mA typ., 0.7mA max.

50/50% typ., 45/55% max.

0.9 x Vdd min.; 0.1 x Vdd max.

VIL ≤ 0.3Vdd: High Impedance

Stand-by current: 10µA max.

32.768kHz

+5Vdc

0.2µs typ., 1µs max.

15pF

± 2mA min.

VIH ≥ 0.7Vdd: Active

+2.5Vdc ± 10%

0.24 mA typ., 0.5mA max.

Aging ± 5ppm max. first year / ± 2ppm max. per year thereafter

Q-T ECH Co rpo rat ion - 1 015 0 W. J efferson Boulevard, Culver City 90232 - Tel: [phone] - Fax: [phone] - www.q-te ch .com

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

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Q-TECH

(5.080 ± 0.13)

0.200 ± .005

0.040
(1.02)

0.197 ± .006

(5.00 ± 0.15)

0.276 ± .006

(7.0 ± 0.2)

(2.54)

0.100

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0.018±.003

(.46±0.08)

(.20 ± 0.03)

0.008 ± .001

(5.08 ± 0.2)

0.200 ± .008

max.

0.205 ± .010

(5.20 ± 0.25)

R 0.20

(R .008)

(4X)

(0.20)

0.008

0.200±.005

(5.80±0.13)

0.028
(0.72)

P/N
FREQ.
D/C S/N

0.197 ± .006
(5.00 ± 0.15)

0.276 ± .006

(7.0 ± 0.2)

12

43

(5.08 ± 0.2)

0.200 ± .008

R 0.20

(R .008)

(4X)

0.060 ± .003

(1.52 ± 0.08)

(.203)

0.008

(1.40 ± 0.08)

0.055 ± .003

0.216

(5.49)

(2.54)

0.100
max.

0.018±.003
(.46±0.08)

(0.20)

0.008

0.028

(0.72)

P/N
FREQ.
D/C S/N

3º to 5º typ.

detail A’

A’

(1.40 ± 0.08)

0.055± .003

0.216

(5.49)

(.203)

0.008

0.197 ± .006
(5.00 ± 0.15)

0.276 ± .006

(7.0 ± 0.2)

(5.08 ± 0.2)

0.200 ± .008

R 0.200

(R .008)

(4X)

0.060 ± .003

(1.52 ± 0.08)

(2.54)

0.100
max.

0.018±.003

(.46±0.08)

(0.20)

0.008

0.028

(0.72)

2

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1

P/N
FREQ.
D/C S/N

A’

3º to 5º typ.

detail A’

.102

(2.6)

0.055

(1.4)

0.040

(1.0)

(2.0)

0.079

12

34

max.

0.197±.006

(5.00±0.15)

0.276±.006

(7.0±0.2)

12

43

(5.08±0.2)

0.2±.008

R 0.200

(R .008)

(4X)

P/N
FREQ.
D/C S/N

0.290±0.005

(7.37±0.13)

0.350±0.005

(8.89±0.13)

0.100±0.005

(2.54±0.13)

0.200±0.005

(5.08±0.13)

0.170 Max.

(4.32)

0.018±0.003

(0.457±0.076)

0.315 max.

(8.00 max.)

0.240±0.005

(6.10±0.13)

0.040 Max.

(1.02)

12

43

Q-TECH
P/N
FREQUENCY
D/C S/N

1

2

4

3

0.350±0.005

0.290±0.005

0.130

0.018±.003

(8.00 max.)

(5.080±0.13)

0.100±.005

0.200±.005

(.457±0.076)

(8.89±0.13)

(7.37±0.13)

(2.54±0.13)

(5.080±0.13)

(3.30)

0.050

(1.27)

(.203)

FREQ.

Q-TECH

D/C S/N

0.315 max.

0.200±.005

0.008

MAX.

P/N

.190 MAX.

(4.826 MAX.)

(.203)

(8.00 max.)

(10.16 ± .13)

.008

.315 max.

.400 TYP.

1

2

4

3

.350 ± .005

.290 ± .005

.100 ± .005

.200 ± .005

(8.89 ± .13)

(7.37 ± .13)

(2.54 ± .13)

(5.08 ± .13)

FREQ.

Q-TECH

D/C S/N

4 X

.048 ± .002

(1.22 ± .051)

4 X

.018 ± .003

(.457 ± .076)

P/N

4 X

.290 ± .005

.190 MAX.

(1.396 ± .13)

.200 ± .005

.048 ± .002

(1.22 ± .051)

(7.37 ± .13)

(5.08 ± .13)

.100 ± .005

(2.54 ± .13)

(4.826 MAX.)

(.203) (2.794 ± .13)

(8.00 max.)

.315 max.

.055 ± .005

.008

.110 ± .005

1 2

43

.350 ± .005

(8.89 ± .13)

4 X

.018 ± .003

(.457 ± .076)

Q-TECH
P/N
FREQ.
D/C S/N

ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS

COR PORATI ON

Package Outline and Pin Connections - Dimensions are in inches (mm)

QT481 AND QT488 SERIES

2.5Vdc and 3.3Vdc - 32.768kHz

QT481

QT488

QT482

QT489

QT483

QT490

QT484

QT492

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

Pin No.

1
2
3
4

Function

TRISTATE or NC

GND/CASE

OUTPUT

VDD

Q-T ECH Co rpo rat ion - 1 015 0 W. J efferson Boulevard, Culver City 90232 - Tel: [phone] - Fax: [phone] - www.q-t e c h.c om

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