User guide

5
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: [phone] - Fax: [phone] - www.q-tech.com
QT89 SERIES
HIGH-RELIABILITY MINIATURE CLOCK OSCILLATORS
1.8 to 5.0Vdc - 15kHz to 160MHz
Q-TECH
CORPORATION
QT89 (Revision J, January 2011) (ECO #10087)
Vdd
GND
0.1xVdd
0.9xVdd
VOH
VOL
TrTf
TH
T
0.5xVdd
SYMMETRY = x 100%
TH
T
Output Waveform (Typical)
Frequency vs. Temperature Curve
Test Circuit
-
-
Output
Ground
4
3
2
0.1µF
15pF
1
Tristate Function
Power
supply
10k
mA
Vdc
+
+
+
(*)
or
0.01µF
QT89
(*) CL includes probe and jig capacitance
Typical test circuit for CMOS logic
0
5
10
15
20
25
30
35
40
45
0.5 2816 24 27 32 36 40 48 50 55 65 70 75 85 100 125 133 150 160
Freq(MHz)
Icc (mA)
TYPICAL SUPPLY CURRENT ICC (mA) AT 3.3Vdc & 5.0Vdc NO LOAD
Icc 3.3V Icc 5V
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.
Typical start-up time of a QT89HC8M-20.000MHz 5.0Vdc at +200ºC (~1.75ms)
FREQUENCY VS. TEMPERATURE QT89AC8 20.000MHz
-250
-200
-150
-100
-50
0
50
100
150
200
250
0510 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 185 190 195 200
Temp (ºC)
ppm