Datenblatt

Quartz Crystal Units
21SMX
STANDARD SMD CRYSTALS
Temperature stability (referred to +25゜
C)
0.00568 gm (wt.)
21SMX
VCXO
0.7
0.65
Drive level (P)
0.5
0.55
#3
0.55
#1
SMI Part No.
TCXO
0.75
1.35
26.000000
260
60
27.000000
270
60
27.120000
271
60
AT-Cut / Fundamental
10 seconds max. at +250゜
C ±10゜
C
1.05
AT-CUT
+100
+80
+60
+40
Load capacitance (CL)
Frequency designator
Frequency
21M400-8
21 = 21SMX
M = Parallel resonance
CL= 8 pF
400 = 40.000 MHz
21S270
21 = 21SMX
S = Series resonance
270 = 27.000 MHz
Package
Lid
21SMX
Metal
Base
Ceramic
Sealing
Seam
Terminal
Tungsten (metalized)
+20
Terminal plating
0
-20
-40
RoHS
-60
-80
0
21 M 400 - 8
Circuit Calibration Condition
Item
(ppm)
OCXO
80
+15
+30
+45
+60
28.636300
286
60
30.000000
300
60
32.000000
320
60
36.000000
360
60
38.400000
384
60
40.000000
400
50
42.000000
420
50
44.545000
44545
50
48.000000
480
50
PACKAGE DATA
0.85
-15
250
Package
#2
SOLDERING PATTERN
-30
25.000000
Example
#3
-100
-45
80
100 μW max. (10 μW for testing)
±5 ppm max. at +25゜
C ±3゜
C per year
Package type
Circuit calibration condition
<Top View>
#4
#2
<#2 & #4 : Grounded to metal lid>
∆f/f
240
PART NUMBERING GUIDE
0.65
#4
24.000000
5 pF max.
Reflow condition
#2
#1
±30 ppm over -20゜
C to +70゜
C
Shunt capacitance (C0)
0.4±0.1
#1
200
8 pF, Typical
Cut / Oscillation mode
#3
1.6±0.1
#4
20.000000
Load capacitance (CL)
Aging
2.0±0.1
20.000 MHz to 80.000 MHz
±30 ppm at +25゜
C ±3゜
C
Max. Equivalent
Series Resistance
Ohms (Ω) ESR
100
+75
OCXO
CLK OSC
Actual size
Frequency Designator
CLK OSC
Frequency tolerance
Frequency
MHz
VCXO
Frequency range
Specifications
21SMX
TCXO
XTAL
Item
Package type
XTAL
21SMX STANDARD FREQUENCIES
STANDARD SPECIFICATIONS
21SMX
Gold / Nickel
(surface) / (under)
Compliant (Pb-free)
C)
+90 (゜
MCF
MCF
TYPICAL TEMPERATURE CHARACTERISTICS
TAPE SPECIFICATIONS
∅
1.5 +
0
-0 .1
1.75±0.1
4.0±0.1
2.0±0.1
A
C
D
L
B
J
M
F
A
B
C
D
F
J
L
M
Reel Dia.
Qty/Reel
2.25
1.85
8.0
3.5
4.0
1.05
0.25
0.65
180
3000pcs
(1000pcs)
24
25
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