1
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
QT581 and QT588 Series (Rev-, December 2010)
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
Applicatios
• Real-time clock driver
• 32.768kHz output crystal modules
Package Information
• Package material: 90% AL2O3
• Lead material: Kovar
• Lead finish:
Gold Plated: 50μ ~ 80μ inches
Nickel Underplate: 100μ ~ 250μ inches
• Weight: 0.6g typ., 3.0g max.
QT581 and QT588 Series (Rev-, December 2010)
2
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
QT581 and QT588 Series (Rev-, December 2010)
Electrical Characteristics
Parameters +3.3Vdc +2.5Vdc
Output frequency range (Fo) 32.768kHz
Supply voltage (Vdd) +3.3Vdc ± 10% +2.5Vdc ± 10%
Maximum Applied Voltage
(Vdd max.) +5Vdc
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) 0.42 mA typ., 0.7mA max. 0.24 mA typ., 0.5mA max.
Symmetry
(50% of ouput waveform) 50/50% typ., 45/55% max.
Rise and Fall times
(Tr, Tf betweeen 10% and 90% of output waveform) 0.2µs typ., 1µs max.
Output Load 15pF
Start-up time (Tstup) 10ms max.
Output voltage (Voh/Vol) 0.9 x Vdd min.; 0.1 x Vdd max.
Output Current (Ioh/Iol) ± 2mA min.
Enable/Disable function Pin 1
VIH ≥ 0.7Vdd: Active
VIL ≤ 0.3Vdd: High Impedance
Stand-by current: 10µA max.
Aging ± 5ppm max. first year / ± 2ppm max. per year thereafter
Q-TECH
CORPORATION
3
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
QT581 and QT588 Series (Rev-, December 2010)
Package Outline and Pin Connections
(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
QT581
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
(1.52)
(.203)
0.008
(1.27)
0.050
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
QT582
(1.27)
0.050
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
(1.52)
(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
QT583
.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
QT584
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)
P/N
FREQ.
Q-TECH
D/C S/N
12
43
QT588
Dimensions are in inches (mm)
QT589 QT590 QT592
12
43
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)
P/N
FREQ.
Q-TECH
D/C S/N
0.315 max.
0.200±.005
0 008
MAX.
6 X
0.290±0.005
0.190 MAX.
(1.396±0.13)
0.200±.005
0.048±.002
(1.22±0.051)
(7.37±0.13)
(5.08±0.13)
0.100±.005
(2.54±0.13)
(4.826 MAX.)
(.203) (2.794±0.13)
(8.00 max.)
0.315 max.
0.055±.005
0.008 0.110±.005
1 2
43
0.350±.0.005
(8.89±0.13)
P/N
FREQ.
Q-TECH
D/C S/N
Pin No.
Function
1
TRISTATE
2
GND/CASE
3
OUTPUT
4
VDD
Available
Operating Temperature Range vs. Frequency Stability
12345678
A✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
B✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
C✓ ✓ ✓ ✓ ✓ ✓
D✓ ✓ ✓ ✓ ✓ ✓
E✓ ✓ ✓ ✓ ✓ ✓
F✓ ✓ ✓ ✓ ✓ ✓
G✓ ✓ ✓ ✓ ✓ ✓
H✓ ✓ ✓ ✓ ✓ ✓
I✓✓✓✓✓
J✓✓✓✓✓
K✓✓✓✓✓
L✓✓✓✓✓
M✓✓✓✓✓
N✓✓✓✓✓
O✓✓✓✓✓
P✓✓✓✓✓
Frequency Stability Options:
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 below:
4
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
QT581 and QT588 Series (Rev-, December 2010)
Ordering Information
Packaging Options Other Options Available For An Additional Charge
Specifications subject to change without prior notice.
• Standard packaging in anti-static plastic tube (60pcs/tube)
• Tape and Reel (800pcs/reel) is available for an additional
charge.
•(*) Hot Solder Dip Sn60/Pb40 per MIL-PRF 55310
• P. I. N. D. test (MIL-STD 883, Method 2020, Condition B)
QT588LD10M-32.768kHz
QT 5 88 LD8M- 32.768kHz
Sample part number
T = Standard
S = Solder Dip (*)
Screening Options:
Blank = No Screening
M = Per MIL-PRF-55310, Level B
Operating Temperature Options:
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
Logic:
L = +3.3Vdc
N = +2.5Vdc
Model #:
(See page 3)
For Non-Standard requirements, contact Q-Tech
Corporation at Sales@Q-Tech.com
5
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
QT581 and QT588 Series (Rev-, December 2010)
Embossed Tape and Reel Information For QT588
Environmental Specifications
The five transition periods for the typical reflow process are:
• Preheat
• Flux activation
• Thermal equalization
• Reflow
• Cool down
Dimensions are in mm. Tape is compliant to EIA-481-A.
Reel size vs. quantity:
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
Reel size (Diameter in mm)
Qty per reel (pcs)
178
150
330
800
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:
Environmental Test 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
• 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
Please contact Q-Tech for higher shock requirements
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
Reflow Profile
6
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
QT581 and QT588 Series (Rev-, December 2010)
Output Waveform (Typical)
Frequency vs. Temperature Curve
Test Circuit
-
-
Output
Ground
43
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
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
Thermal Characteristics
JA JC CA
Die
T
T
TC
A
J
CA
JC
(Figure 1)
(Figure 2)
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.
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
Start up Time at 200ºC
-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