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ECS-3X8 参数 Datasheet PDF下载

ECS-3X8图片预览
型号: ECS-3X8
PDF下载: 下载PDF文件 查看货源
内容描述: 32.768kHz的音叉型晶体 [32.768 KHz TUNING FORK CRYSTALS]
分类和应用: 晶体谐振器石英晶体驱动
文件页数/大小: 1 页 / 81 K
品牌: ECS [ ECS, INC. ]
   
ECS-3X8, 2X6, 1X5
32.768 KHz TUNING FORK CRYSTALS
ECS tuning fork type crystals are used as a
clock source in communication equipment,
measuring instruments, microprocessors and
other time management applications. Their
low power consumption makes these crystals
ideal for portable equipment.
FEATURES
• Cost effective
• Tight tolerance
• Long term stability
• Excellent resistance and environmental characteristics
PART NUMBERING GUIDE
“EXAMPLE”
ECS
ECS
ECS
FREQUENCY
.327
.327
.327
LOAD CAPACITANCE
12.5
12.5
8
PACKAGE TYPE*
8
13
14
* Package type examples (8=3x8, 13=2x6, 14=1x5)
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
PARAMETERS
NOMINAL FREQUENCY
FREQUENCY TOLERANCE
LOAD CAPACITANCE (typ.)
DRIVE LEVEL (max.)
RESISTANCE
AT SERIES RESONANCE
Q-FACTOR
TURNOVER TEMPERATURE
TEMPERATURE COEFFICIENT
SHUNT CAPACITANCE
CAPACITANCE RATIO
OPERATING TEMP. RANGE
STORAGE TEMP. RANGE
SHOCK RESISTANCE
INSULATION RESISTANCE
AGING (FIRST YEAR)
MOTIONAL CAPACITANCE
Fo
∆f/fo
C
L
D
L
R
1
Q
T
M
ß
C
o
T
OPR
T
STG
IR
∆f/fo
C
1
ECS-3X8
32.768
±20
12.5
1
35 (max.)
90,000 (typ.)
+25 ±5
-0.040ppm/˚C
2
max.
1.60 (typ.)
460 (typ.)
ECS-2X6
ECS-1X5
32.768
32.768
±20
±20
12.5
8.0
1
1
35 (max.)
40 (max.)
70,000 (typ.)
80,000 (typ.)
+25 ±5
+25 ±5
2
-0.040ppm/˚C max.
-0.040ppm/˚C
2
max.
1.35 (typ.)
1.00 (typ.)
450 (typ.)
400 (typ.)
-10~+60
-40~+85
Drop test 3 times on hard wooden board from height of 75cm / ±5 PPM max.
500MΩ min./DC100V
±3 PPM max. @ +25˚C ±3˚C
0.0035 (typ.)
0.0030 (typ.)
0.0025 (typ.)
UNITS
KHz
PPM
pF
µW
KΩ
˚C
PPM/(∆C˚)
pF
˚C
˚C
PPM
MΩ
PPM
pF
Note: Contact factory for optional load capacitance.
PACKAGE DIMENSIONS (mm)
1.1
Ø
3.1 Max.
RECOMMENDED OSCILLATION
CIRCUIT
Rf
PARABOLIC TEMPERATURE CURVE
T (˚C)
-20 -10
0
10
20 30 40 50
-10
-20
60
70
ø 0.35
8.2 Max.
10
Rd
-30
-40
-50
Figure 1) ECS-3X8
0.7
C
1
C
2
-60
ø 2.1 Max
ø 0.26
f/f (PPM)
6.2 Max.
10
Figure 2) ECS-2X6
0.45
ø 1.5 Max
ELECTRICAL CHARACTERISTICS
IC: TC 4069P
Rf: 10MΩ
Rd: 330KΩ (As required)
C
1
= 22pF, C
2
= 22pF
V
DD
= 3.0V
In this circuit, low drive level with a maximum of
1µW is recommended. If excessive drive is
applied, irregular oscillation or quartz element
fractures may occur.
To determine frequency stability, use parabolic
curvature. For example: What is the stability at 45˚C?
1) Change in T (˚C) = 45 -25 = 20˚C
2
2) Change in frequency = -0.04 PPM x (
T)
2
= -0.04 PPM x (20)
= -16.0 PPM
5.1 Max.
4.3
Figure 3) ECS-1X5
ECS, INC. INTERNATIONAL
1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM
CRYSTALS
3
ø 0.2
CRYSTALS