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
3.3Vdc and 2.5Vdc, clock square wave
generator and a miniature round or strip A
T
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 A cut crystal temperature
T
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: 90% AL2O3
• Lead material: Kovar
• Lead finish:
Gold Plated: 50μ ~ 80μ inches
Nickel Underplate: 100μ ~ 250μ inches
• Weight: 0.6g typ., 3.0g max.
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
QT481 and QT488 Series (Revision -, October 2010)
1
QT481 AND QT488 SERIES
Q-TECH
CORPORATION
ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS
2.5Vdc and 3.3Vdc - 32.768kHz
Electrical Characteristics
Parameters
Output frequency range (Fo)
Supply voltage (Vdd)
Maximum Applied Voltage
(Vdd max.)
Frequency stability (∆F/∆T)
Operating temperature (Topr)
Storage temperature (Tsto)
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)
Output voltage (V ol)
oh/V
Output Current (Ioh/Iol)
Enable/Disable function Pin 1
Aging
0.42 mA typ., 0.7mA max.
50/50% typ., 45/55% max.
0.2µs typ., 1µs max.
15pF
10ms max.
0.9 x Vdd min.; 0.1 x Vdd max.
± 2mA min.
VIH ≥ 0.7Vdd: Active
VIL ≤ 0.3Vdd: High Impedance
Stand-by current: 10µA max.
± 5ppm max. first year / ± 2ppm max. per year thereafter
+3.3Vdc ± 10%
+5Vdc
See Ordering Information
See Ordering Information
-55ºC to + 125ºC
0.24 mA typ., 0.5mA max.
+3.3Vdc
32.768kHz
+2.5Vdc
+2.5Vdc ± 10%
Q-TECH Corporation
-
10150 W. Jefferson Boulevard, Culver City 90232
-
Tel: 310-836-7900 - Fax: 310-836-2157
-
www.q-te c h.co m
QT481 and QT488 Series (Revision -, October 2010)
2
QT481 AND QT488 SERIES
Q-TECH
CORPORATION
ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS
2.5Vdc and 3.3Vdc - 32.768kHz
Dimensions are in inches (mm)
QT483
(4X)
R 0.20
(R .008)
4
P/N
0.197 ± .006
(5.00 ± 0.15)
Package Outline and Pin Connections
QT481
0.276 ± .006
(7.0 ± 0.2)
4
P/N
FREQ.
D/C S/N
3
(4X)
R 0.20
(R .008)
QT482
0.276 ± .006
(7.0 ± 0.2)
3
QT484
(4X)
R 0.200
3
(R .008)
4
0.276±.006
(7.0±0.2)
3
P/N
(4X)
R 0.200
(R .008)
0.276 ± .006
(7.0 ± 0.2)
4
P/N
0.197 ± .006
(5.00 ± 0.15)
FREQ.
D/C S/N
FREQ.
D/C S/N
0.197 ± .006
(5.00 ± 0.15)
FREQ.
D/C S/N
0.197±.006
(5.00±0.15)
1
0.200 ± .008
(5.08 ± 0.2)
2
1
0.200 ± .008
(5.08 ± 0.2)
2
1
2
0.2±.008
(5.08±0.2)
1
0.200 ± .008
(5.08 ± 0.2)
2
0.100
max.
(2.54)
0.028
(0.72)
0.040
(1.02)
0.008
(0.20)
0.100
max.
(2.54)
0.028
(0.72)
0.060
(1.52)
0.008
(0.20)
0.200±.005
(5.80±0.13)
0.008
(0.20)
0.100
max.
(2.54)
0.028
(0.72)
0.060
(1.52)
1
4
2
3
0.079
(2.0)
max.
0.018±.003
(.46±0.08)
0.018±.003
(.46±0.08)
0.018±.003
(.46±0.08)
0.216
(5.49)
0.216
(5.49)
0.008
(.203)
.102
(2.6)
0.200 ± .005
0.008 ± .001
(.20 ± 0.03)
0.205 ± .010
(5.20 ± 0.25)
(5.080 ± 0.13)
0.008
(.203)
0.050
(1.27)
0.055
(1.4)
0.040
(1.0)
0.050
(1.27)
QT488
0.350±0.005
(8.89±0.13)
4
3
QT489
0.350±0.005
(8.89±0.13)
QT490
0.350±.0.005
(8.89±0.13)
4
3
3
QT492
0.350±.0.005
(8.89±0.13)
4
3
4
Q-TECH
P/N
FREQ.
D/C S/N
0.290±0.005
(7.37±0.13)
Q-TECH
P/N
FREQ.
D/C S/N
0.290±0.005
(7.37±0.13)
Q-TECH
P/N
FREQ.
D/C S/N
0.290±0.005
(7.37±0.13)
Q-TECH
P/N
FREQ.
D/C S/N
0.290±0.005
(7.37±0.13)
1
2
0.100±0.005
(2.54±0.13)
1
2
0.100±.005
(2.54±0.13)
1
2
0.100±.005
(2.54±0.13)
1
2
0.100±.005
(2.54±0.13)
0.200±.005
0.200±0.005
(5.08±0.13)
0.200±.005
(5.080±0.13)
0.200±.005
(5.080±0.13)
0.170 Max.
(4.32)
(5.08±0.13)
0.130
(3.30)
0.190 MAX.
MAX.
0.190 MAX.
(4.826 MAX.)
0.048±.002
6X
(1.22±0.051)
(4.826 MAX.)
0.018±0.003
(0.457±0.076)
0.050
(1.27)
0.018±.003
(.457±0.076)
0.018±.003
(.457±0.076)
0.315 max.
(8.00 max.)
0.315 max.
0.315 max.
(8.00 max.)
(8.00 max.)
0.040 Max.
(1.02)
0.240±0.005
(6.10±0.13)
0.315 max.
(8.00 max.)
0.008
(.203)
0.110±.005
(2.794±0.13)
0.055±.005
(1.396±0.13)
0.400TYP.
0.200±.005
0 008
(5 080±0 13)
(10.160±0.13)
0.008
(.203)
Pin No.
1
2
3
4
TRISTA or NC
TE
GND/CASE
OUTPUT
VDD
Function
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
QT481 and QT488 Series (Revision -, October 2010)
3
QT481 AND QT488 SERIES
Q-TECH
CORPORATION
ULTRA-LOW CURRENT REAL TIME CLOCK OSCILLATORS
2.5Vdc and 3.3Vdc - 32.768kHz
Ordering Information
Sample part number
QT 48 8L D 10M- 32. 768 kH z
Q T 4 88 L D 10 M - 32. 76 8 kHz
T = Standard
S = Solder Dip
(*)
Model #:
(See page 3)
Output frequency
Screening Options:
Blank
=
No Screening
M
=
Per MIL-PRF-55310, Level B
Logic:
L = +3.3Vdc
N = +2.5Vdc
Tristate Option
Blank = No Tristate
D
= Tristate
1
4
5
6
9
10
11
12
Frequency vs. Temperature Code:
= ± 100ppm at
0ºC to +70ºC
= ± 50ppm at
0ºC to +70ºC
= ± 25ppm at -20ºC to +70ºC
= ± 50ppm at -55ºC to +105ºC
= ± 50ppm at -55ºC to +125ºC
= ± 100ppm at -55ºC to +125ºC
= ± 50ppm at -40ºC to +85ºC
= ± 100ppm at -40ºC to +85ºC
Frequency stability vs. temperature codes may not be available in all frequencies.
For Non-Standard requirements, contact Q-Tech Corporation at Sales@Q-Tech.com
Packaging Options
• Standard packaging in anti-static plastic tube (60pcs/tube)
• Tape and Reel (800pcs/reel) is available for an additional
charge.
Other Options Available For An Additional Charge
•
(*)
Hot Solder Dip Sn60 per MIL-PRF 55310
• P. I. N. D. test
(MIL-STD 883, Method 2020)
Specifications subject to change without prior notice.
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
QT481 and QT488 Series (Revision -, October 2010)
4
QT481 AND QT488 SERIES
Q-TECH
CORPORATION
ULTRA-LOW CURRENT 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
TYPICAL REFLOW PROFILE FOR Sn-Pb ASSEMBLY
Embossed Tape and Reel Information For QT488
FEEDING (PULL) DIRECTION
2.0±0.1 4.0±0.1
1.75±0.1
0.3±.005
5°Max
Ø1.5
11.5
9.271
4.699±0.1
Ø1.5
7.747±0.1
16±0.1
Ø13.0±0.5
2.5
Ø178±1
or
Ø330±1
2.0
26
120°
TEMP(*C)
Ramp up (3ºC/s Max)
250
225
200
175
150
240º
Ramp down (6ºC/s Max)
225º min.
240º max.
60s min.
150s max.
60s min.
120s max.
125
100
75
50
25
0
0
20
40
60
60s min.
120s max.
80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420
Time (s)
Dimensions are in mm. Tape is compliant to EIA-481-A.
Reel size vs. quantity:
Reel size (Diameter in mm)
Qty per reel (pcs)
150
800
178
330
Environmental Specifications
Q-Tech Standard Screening/QCI (MIL-PRF55310) is available for all of our QT481 and QT488 series. Q-Tech can also customize
screening and test procedures to meet your specific requirements. The QT481 and QT488 series are designed and processed to exceed
the following test conditions:
Environmental Test
Temperature cycling
Constant acceleration
Seal: Fine and Gross Leak
Burn-in
Aging
Vibration sinusoidal
Shock, non operating
Thermal shock, non operating
Ambient pressure, non operating
Resistance to solder heat
Moisture resistance
Terminal strength
Resistance to solvents
Solderability
ESD Classification
Moisture Sensitivity Level
Test Conditions
MIL-STD-883, Method 1010, Cond. B
MIL-STD-883, Method 2001, Cond. A, Y1
MIL-STD-883, Method 1014, Cond. A and C
160 hours, 125°C with load
30 days, 70°C, ±1.5ppm max
MIL-STD-202, Method 204, Cond. D
MIL-STD-202, Method 213, Cond. I (See Note 1)
MIL-STD-202, Method 107, Cond. B
MIL-STD-202, 105, Cond. C, 5 minutes dwell time minimum
MIL-STD-202, Method 210, Cond. B
MIL-STD-202, Method 106
MIL-STD-202, Method 211, Cond. C
MIL-STD-202, Method 215
MIL-STD-202, Method 208
MIL-STD-883, Method 3015, Class 1 HBM 0 to 1,999V
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
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
QT481 and QT488 Series (Revision -, October 2010)
5
24.0±0.3
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
