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1139
D
Quartz Crystals - 32.768 kHz
-20
T(
°C)
f/f (PPM)
-10
-20
-30
-40
-50
-60
10
020 30 40 50 60 70
Parabolic Temperature Curve
To determine frequency stability, use parabolic
curvature. For example: What is the stability at 45C?
(1) Change in T (C) = 45 - 25 = 20C
(2) Change in frequency
= 0.04 PPM x ( T)
= 0.04 PPM x (20)
= -16.0 PPM
ECX-3TA Series Specifications:
Frequency: 32.768kHz Frequency Tolerance @ 25°C: ±20ppm Equivalent Series Resistance: 50kΩ
Max. Shunt Capacitance: 2.0pF Typ. Operating Temperature: -40°C ~ 85°C Storage Temperature:
-55°C ~ 125°C
Load
Capacitance
Digi-Key
Part No.
Cut Tape
Digi-Key
Part No.
Tape & Reel
ECS
Part No.
Price Each
Pricing
1
10
100
3,000
12.5pF
X488CT-ND
.86
.72
.58
X488TR-ND
445.20/M ECS-.327-12.5-24-TR
RoHS Compliant
12.5pF
X968CT-ND
.86
.72
.58
—
ECS-.327-12.5-24X-TR
Cylinder Type
Fig.
Load
Capaci-
tance
Equivalent
Series
Resistance
Shunt
Capacitance
(Typ.)
Digi-Key
Part No.
Price Each
ECS
Part No.
1
10
100
1
12.5pF
35kΩ
1.6pF
X801-ND
.16
.15
.12
ECS-3X8
2
12.5pF
35kΩ
1.35pF
X802-ND
.16
.15
.12
ECS-.327-12.5-13
3
8.0pF
40kΩ
1.00pF
X803-ND
1.39
1.26
1.01
ECS-.327-8-14
RoHS Compliant
1
12.5pF
35kΩ
1.6pF
X1123-ND
.16
.15
.12
ECS-3X8X
2
12.5pF
35kΩ
1.35pF
X1124-ND
.16
.15
.12
ECS-.327-12.5-13X
3
8.0pF
40kΩ
1.00pF
X1125-ND
.33
.30
.24
ECS-.327-8-14X
ECX-306
ECX-306 Series Specifications:
Frequency: 32.768kHz Frequency Tolerance @ 25°C: ±20ppm Equivalent Series Resistance: 50kΩ
Max. Shunt Capacitance: 1.3pF Typ. Drive Level: 1μW Max. Calibration Tolerance: ±20 ppm @ 25°C
Temperature Coefficient: -0.040 ppm/°C2 Max. Operating Temperature: -40°C ~ 85°C Max. Storage
Temperature:
-55°C ~ 125°C Q Factor: 50,000 Minimum Turnover Temperature: 25°C (±5°C) Insula-
tion Resistance:
500MΩ Minimum, 100VDC Motional Capacitance: 0.003pF Typ. Aging (first year):
±3ppm Max. @ 25°C
Load
Capacitance
Digi-Key
Part No.
Cut Tape
Digi-Key
Part No.
Tape & Reel
ECS
Part No.
Price Each
Pricing
1
10
100
3,000
6.0pF
XC746CT-ND
.57 .48 .39 XC746TR-ND
296.80/M ECS-.327-6-17-TR
12.5pF
XC488CT-ND
.57 .48 .39 XC488TR-ND
296.80/M ECS-.327-12.5-17-TR
RoHS Compliant
6.0pF
XC1307CT-ND .57 .48 .39 XC1307TR-ND
296.80/M ECS-.327-6-17X-TR
12.5pF
XC1195CT-ND .57 .48 .39 XC1195TR-ND
296.80/M ECS-.327-12.5-17X-TR
ECX-31
Load
Capacitance
Digi-Key
Part No.
Cut Tape
Digi-Key
Part No.
Tape & Reel
ECS
Part No.
Price Each
Pricing
1
10
100
3,000
RoHS Compliant
12.5pF
XC1085CT-ND 2.37
2.14
1.78 XC1085TR-ND
1184.55/M ECS-.327-12.5-32-TR
ECX-3TA
Quartz Crystals - ECS-31 Series
Specifications:
Frequency Tolerance:
±30ppm @ 25°C
Temperature Coefficient: -0.034ppm/°C
Operating Temperature: -10°C ~ 60°C
Storage Temperature: -40°C ~ 85°C
Equivalent Series Resistance (ESR): 30kΩ ~ 50kΩ Max.
Shunt Capacitance: .8pF ~ 1.7pF
Drive Level: 1μW Max.
Insulation Resistance: 500MΩ Min./DC 100V ±15V
Aging (First Year): ±5ppm Max. @25°C ±3°C
Frequency
(kHz)
Load
Capacitance
Digi-Key
Part No.
Price Each
ECS
Part No.
1
10
100
500
32.000
12.5pF
XC972-ND
.44
.40
.32
.28
ECS-.320-12.5-13
40.000
12.5pF
XC973-ND
.44
.40
.32
.28
ECS-.400-12.5-13
60.000
12.5pF
XC974-ND
.44
.40
.32
.28
ECS-.600-12.5-13
65.536
12.5pF
XC975-ND
.44
.40
.32
.28
ECS-.655-12.5-13
75.000
12.5pF
XC976-ND
.44
.40
.32
.28
ECS-.750-12.5-13
100.000
12.5pF
XC977-ND
.44
.40
.32
.28
ECS-1.00-12.5-13
125.000
12.5pF
XC999-ND
.44
.40
.32
.28
ECS-1.25-12.5-13
153.600
12.5pF
XC978-ND
.44
.40
.32
.28
ECS-1.536-12.5-13
RoHS Compliant
32.000
12.5pF
XC1392-ND
.44
.40
.32
.28
ECS-.320-12.5-13X
65.536
12.5pF
XC1393-ND
.44
.40
.32
.28
ECS-.655-12.5-13X
100.000
12.5pF
XC1394-ND
.44
.40
.32
.28
ECS-1.00-12.5-13X
153.600
12.5pF
XC1395-ND
.44
.40
.32
.28
ECS-1.536-12.5-13X
1.4
Front View
5.5
2.5
0.5
Side View
43
1
Bottom View
2
1.9
1.3
4.2
8.0 max.
Top View
3.8
43
12
3.2
1.2
Top View
Side View
1.0 Max.
0.725
Bottom View
1.07
End View
Land Pattern
1.6
1.0
1.3
Crystal Connection
Front View
1.2
3.88
1.2
1.3
2.4
1.3
#4
#3
#1
7.3
Top View
2.0
2.5 4.1
#2
0.4
5.08
Side View
0.2
1.8
2.0
#4
#3
#1
Bottom View
#2
2.1
6.2
10.0
2- 0.26
0.7
8.2
3.1
10
.35
1.1
6.2
2.1
10
.26
.7
Fig. 2
5.1
1.5
4.3
.2
.45
Fig. 1
Fig. 3
Specifications:
Frequency: 32.768kHz Frequency Tolerance @ 25°C: ±20ppm Drive Level: 1μW Operating Tem-
perature:
-10°C ~ 60°C Storage Temperature: -40°C ~ 85°C