Q-Tech QT581 User Manual

Q-TECH

COR PORATI ON

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

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 accuracy­improvement 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.

QT581 AND QT588 SERIES

2.5Vdc and 3.3Vdc - 32.768kHz

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

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

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

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Electrical Characteristics

Parameters +3.3Vdc +2.5Vdc

QT581 AND QT588 SERIES

ULTRA-LOW CURRENT, HIGH-TEMPERATURE 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-0007 (Rev A, January 2013) (ECO #10336)

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(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

12

43

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

4 3

(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

43

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

4 3

(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)

FREQ.

Q-TECH

D/C S/N

12

43

P/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

4 3

.350 ± .005

(8.89 ± .13)

P/N
FREQ.

Q-TECH

D/C S/N

4 X

.018 ± .003

(.457 ± .076)

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

COR PORATI ON

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

QT581 AND QT588 SERIES

2.5Vdc and 3.3Vdc - 32.768kHz

QT581

QT588

QT582

QT589

QT583

QT590

QT584

QT592

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

Package Information

Nickel Underplate: 100μ ~ 250μ inches

3

Pin No.

1
2
3
4

Function

TRISTATE

GND/CASE

OUTPUT

VDD

• Package material: 91% AL2O

• Lead material: Kovar

• Lead finish: Gold Plated: 50μ ~ 80μ inches

• Weight: 0.6g typ., 3.0g max.

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Ordering Information

Solder Dip Option:

T = Standard

S = Solder Dip (*)

G = Solder Dip (*)

QT581 AND QT588 SERIES

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

2.5Vdc and 3.3Vdc - 32.768kHz

(Sample part number)

QT581 L D 7 M - 3 2 . 7 6 8 k Hz

Q T 5 81 L D 7 M- 3 2 .768k Hz

Output Frequency

Screening Option:

Blank = No Screening

M = Per MIL-PRF-55310, Level B

High Temperature
Real Time Clock Oscillator

Package:

(See page 3)

Logic & Supply Voltage:

L = LVHCMOS +3.3V

N = LVHCMOS +2.5V

TABLE I (QT581 SERIES) TABLE II (QT588 SERIES)

Operating Temperature Range vs. Frequency Stability

1 2 3 4 5 6 7 8
A
B
C
D
E

F
G
H

I

J
K
L

M

N
O

P

Operating Temperature Option:

A = 0ºC to + 150ºC
B = 0ºC to + 175ºC
C = 0ºC to + 185ºC
D = 0ºC to + 200ºC

E = -20ºC to + 150ºC

F = -20ºC to + 175ºC
G = -20ºC to + 185ºC
H = -20ºC to + 200ºC

I = -40ºC to + 150ºC

J = -40ºC to + 175ºC
K = -40ºC to + 185ºC

L = -40ºC to + 200ºC

M = -55ºC to + 150ºC

N = -55ºC to + 175ºC
O = -55ºC to + 185ºC
P = -55ºC to + 200ºC

Available Combinations of

✓ ✓ ✓ ✓

✓ ✓ ✓

✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓

Frequency Stability Option:

1 = ± 40ppm
2 = ± 50ppm
3 = ± 75ppm
4 = ± 100ppm
5 = ± 150ppm
6 = ± 175ppm
7 = ± 200ppm
8 = ± 250ppm

Not every combination of Operating Temperature
range and Frequency Stability will be available.
See TABLE I and TABLE II below:

Available Combinations of

Operating Temperature Range vs. Frequency Stability

1 2 3 4 5 6 7 8

✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓

A

✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓

B
C
D
E

F
G
H

I

J
K
L

M

N
O

P

✓ ✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓ ✓

✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓

For Non-Standard requirements, contact Q-Tech Corporation at [e-mail]

Packaging Options Other Options Available For An Additional Charge

• Standard packaging in black foam

• Standard packaging in anti-static plastic tube (60 pcs/tube)

• Tape and Reel (800 pcs/reel) is available for an additional
charge.

Specifications subject to change without prior notice.

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

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

• P. I. N. D. test (MIL-STD 883, Method 2020, Condition B)

(*) Hot Solder Dip options for an additional cost:

S = Sn60/Pb40 per MIL-PRF 55310
G = Lead free Alloy SAC305 (96.5% Sn, 3% Ag, 0.5% Cu)

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Q-TECH

Ø178±1

26

FEEDING (PULL) DIRECTION

Ø13.0±0.5

120°

2.5

4.699±0.1

Ø1.5

16±0.1

2.0

1.75±0.1

0.3±.005

2.0±0.1

7.747±0.1

4.0±0.1

or

Ø330±1

Ø1.5

9.271

5°Max

24.0±0.3

11.5

P/N

FREQUENCY

D/C S/N

0 20 40 60 80 100 120 140 160

180

200 220 240 260

280

300 320 340 360 380 400 420 Time (s)

25

50

75

100

125

150

175

200

225

250

TEMP(*C)

0

60s min.

120s max.

60s min.

120s max.

225º min.
240º max.

60s min.

150s max.

240º

Ramp down (6ºC/s Max)

Ramp up (3ºC/s Max)

TYPICAL REFLOW PROFILE FOR Sn-Pb ASSEMBLY

COR PORATI ON

QT581 AND QT588 SERIES

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

2.5Vdc and 3.3Vdc - 32.768kHz

Reflow Profile

The five transition periods for the typical reflow process are:

• Preheat

• Flux activation

• Thermal equalization

• Reflow

• Cool down

Environmental Specifications

Q-Tech Standard Screening/QCI (MIL-PRF55310) is available for all of our QT581 and QT588 series. Q-Tech can also customize
screening and test procedures to meet your specific requirements. The QT581 and QT588 series are designed and processed to exceed
the following test conditions:

Temperature cycling MIL-STD-883, Method 1010, Cond. B
Constant acceleration MIL-STD-883, Method 2001, Cond. A, Y1
Seal: Fine and Gross Leak MIL-STD-883, Method 1014, Cond. A and C
Burn-in 160 hours, 125°C with load
Aging 30 days, 70°C, ±1.5ppm max
Vibration sinusoidal MIL-STD-202, Method 204, Cond. D
Shock, non operating MIL-STD-202, Method 213, Cond. I (See Note 1)
Thermal shock, non operating MIL-STD-202, Method 107, Cond. B
Ambient pressure, non operating MIL-STD-202, 105, Cond. C, 5 minutes dwell time minimum
Resistance to solder heat MIL-STD-202, Method 210, Cond. B
Moisture resistance MIL-STD-202, Method 106
Terminal strength MIL-STD-202, Method 211, Cond. C
Resistance to solvents MIL-STD-202, Method 215
Solderability MIL-STD-202, Method 208
ESD Classification MIL-STD-883, Method 3015, Class 1 HBM 0 to 1,999V
Moisture Sensitivity Level J-STD-020, MSL=1

Note 1: Additional shock results successfully passed on 16MHz, 20MHz, 24MHz, 40MHz, and 80MHz

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

Embossed Tape and Reel Information For QT588

Dimensions are in mm. Tape is compliant to EIA-481-A.

Reel size vs. quantity:

Reel size (Diameter in mm)

178
330

Environmental Test Test Conditions

• Shock 850g peak, half-sine, 1 ms duration (MIL-STD-202, Method 213, Cond. D modified)

• Shock 1,500g peak, half-sine, 0.5ms duration (MIL-STD-883, Method 2002, Cond. B)

• Shock 36,000g peak, half-sine, 0.12 ms duration

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

Please contact Q-Tech for higher shock requirements

Qty per reel (pcs)

150
800

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-

-

Output

Ground

4

3

2

0.1µF

15pF

1

Tristate Function

Power

supply

10k

mA

Vdc

+

+

+

(*)

or

0.01µF

QT88

(*) CL includes probe and jig capacitance

Typical test circuit for CMOS logic

-250

-200

-150

-100

-50

0

50

100

150

200

250

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200

Frequency Stability (PPM)

Temperature (°C)

Type: QT88LD8M Vcc Input:3.3 Out Freq:32.768Khz +/-250ppm@ 0 to 200 deg.C

45º 45º

Hybrid Case

Substrate

Die

D/A epoxy

D/A epoxy

Heat

Die

R1

D/A epoxy

Substrate

D/A epoxy

Hybrid Case

R2 R3 R4 R5

JA JC CA

Die

T

T

T

C

A

J

CA

JC

COR PORATI ON

QT581 AND QT588 SERIES

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

2.5Vdc and 3.3Vdc - 32.768kHz

Output Waveform (Typical)

Frequency vs. Temperature Curve

Test Circuit

The Tristate function on pin 1 has a built-in pull-up resistor typical 50kΩ, so it can
be left floating or tied to Vdd without deteriorating the electrical performance.

Start up Time at 200ºC

Thermal Characteristics

The heat transfer model in a hybrid package is described in figure 1.

Heat spreading occurs when heat flows into a material layer of increased
cross-sectional area. It is adequate to assume that spreading occurs at a
45° angle.

The total thermal resistance is calculated by summing the thermal
resistances of each material in the thermal path between the device and
hybrid case.

RT = R1 + R2 + R3 + R4 + R5

The total thermal resistance RT (see figure 2) between the heat source
(die) to the hybrid case is the Theta Junction to Case (Theta JC) in°C/W.

• Theta junction to case (Theta JC) for this product is 30°C/W.

• Theta case to ambient (Theta CA) for this part is 100°C/W.

• Theta Junction to ambient (Theta JA) is 130°C/W.

Maximum power dissipation PD for this package at 25°C is:

• PD(max) = (TJ (max) – TA)/Theta JA

• With TJ = 175°C(Maximum junction temperature of die)

• PD(max) = (175 – 25)/130 = 1.15W

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

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

(Figure 1)

(Figure 2)

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QT581 AND QT588 SERIES

Q-TECH

COR PORATI ON

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

2.5Vdc and 3.3Vdc - 32.768kHz

Revision History

ECO REV REVISION SUMMARY Page

Added dimension tolerance to QT582 & QT583 outlines 3

Added Solder Dip option G 3

10336

Modified ordering information table 4

B

Added “Revision History” table 7

Add document number on footer of all pages All

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

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

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