CX-1C-SM2FREQ(A/C) [EUROQUARTZ]

Parallel - Fundamental Quartz Crystal, 0.53MHz Min, 2.1MHz Max, HERMETIC, MINIATURE, CERAMIC PACKAGE-2;


型号：	CX-1C-SM2FREQ(A/C)
厂家：	EUROQUARTZ LIMITED
描述：	Parallel - Fundamental Quartz Crystal, 0.53MHz Min, 2.1MHz Max, HERMETIC, MINIATURE, CERAMIC PACKAGE-2 驱动晶体谐振器
文件：	总2页 (文件大小：97K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

CX MINIATURE CRYSTALS

EUROQUARTZ

Telephone:

Fax:

+44(0)1460 230000

+44(0)1460 230001

sales@euroquartz.co.uk

www.euroquartz.co.uk

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530kHz ttoo 22..11MMHHzz

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Email:

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MMIINNIIAATTUURREE SSMMDD CCRRYYSSTTAALL

Extensional mode

Ideal for use with microprocessors

Designed for low-power applications

Compatible with hybrid or PC board packaging

Low ageing

Full military environmental testing available

Ideal for battery operated applications

General Description

The miniature CX-1-SM crystals in leadless ceramic packages have

been designed for surface-mounting on printed circuit boards or

hybrid circuits. Hermitically sealed in a rugged, miniature ceramic

package, the CX-1-SM crystal is manufactured using a photo-

lithographic process.

Specification

Frequency Range:

Functional Mode:

Calibration Tolerance*:

530kHz to 2 .1MHz

Extensional

±0.05% (±500ppm)

±0.1%

±1.0%

Load Capacitance:

7pF

Motional Resistance (R ):

Motional Capacitance (C ):

Quality Factor (Q):

3k max.

1.2fF

150k

Outline

Shunt Capacitance (C ):

Drive Level:

Turning Point (T )**:

1.0pF

3 W max.

35°C

CX-1-SM Package Dimensions

Note: Frequency (f) deviation from frequency (f ) @ turning point

temperature (T ):

Typical

(mm)

Maximum

(mm)

Dimension

f-fo

k(T-To)

8.00

3.56

8.38

3.94

Ageing, first year:

Shock, survival:

Vibration, survival:

Operating Temperature:

±5ppm max.

750g 0.3ms, ½ sine

10g rms, 20-1,000Hz random

-10°~+70°C (commercial)

-40°~+85°C (industrial)

-55°~+125°C (military)

-55°C~+125°C

see below

1.40

1.14

1.52

1.78

Storage Temperature:

Process Temperature:

260°C for 20 seconds

Dimension

“C”

Glass Lid

(mm max.)

Ceramic Lid

(mm max.)

Specifications are typical at 25°C unless otherwise indicated.

SM1

SM2

SM3

1.65

1.70

1.78

1.83

1.90

Tighter frequency calibration available

Other turning point available

Equivalent Circuit

Solder Pad Layout

1.78

4.06

6.86

Motional Resistance

Motional Capacitance

Motional Inductance

Shunt Capacitance

CX MINIATURE CRYSTALS

EUROQUARTZ

Telephone:

Fax:

+44(0)1460 230000

+44(0)1460 230001

sales@euroquartz.co.uk

www.euroquartz.co.uk

Page

CX-1-SM

530kHz ttoo 22..11MMHHzz

2 of 2

Email:

Web:

MMIINNIIAATTUURREE SSMMDD CCRRYYSSTTAALL

Circuit Design

Conventional HCMOS Pierce Oscillator Circuit

Typical Pierce Oscillator Application

Amplifier

Buffer

The low profile CX miniature surface-mount crystal is ideal for small,

battery operated portable products. The CX crystal design in a Pierce

oscillator (single inverter) circuit has a very low current consumption

with high stability. A conventional HCMOS Pierce oscillator circuit is

shown below. The crystal is effectively inductive and in a Pi network

with C and C which provides the additional phase-shift necessary

to sustain oscillation. The oscillation frequency (f ) is 15ppm to

150ppm above the crystal’s series resonant frequency (F ).

Osc.

Freq. (Fo)

CX-1

Drive Level

R is used to limit the crystal’s drive level by forming a voltage

divider between R and C . R also stabilizes the oscillator against

changes in the amplifiers output resistance (R ). R should be

increased for higher voltage operation.

Terminations

Load Capacitance

The CX crystal calibration tolerance is influenced by the effective

circuit capacitances, specified as the load capacitance (C .) C is

approximately equal to:

Termination

Designation

C x C

C + C

SM1

SM2

SM3

Gold Plated

NOTE: C and C include stray layout capacitance to ground. C is

the stray shunt capacitance between the crystal terminals. In

practice, the effective valus of C will be less than that calculated

from C , C , and CS values due to the effect of the amplifier output

resistance. C should be minimized.

Nickel, Silver Plated

Nickel, Solder Plated and Solder Dipped

The oscillation frequency (f ) is approximately equal to:

Packaging

CX-1-SM - Tray Pack (Standard)

16mm tape, 178mm or 330mm reels (Optional)

per EIA 481

2(C + C )

Where F = Series resonant frequency of the crystal

C = Motional Capacitance

C = Shunt Capacitance

Order Code

Blank = Glass Lid

C = Ceramic Lid

Frequency

CX-1

-SM1 1.0MHz

(A / I)

SM1

SM2

SM3

“S” if special

or custom design

Blank if standard

Calibration

Tolerance*

@ 25°C

(A)

(B)

Temperature

Range:

C = Commercial

I = Industrial

M = Military

S = Specify

*For other

calibrations

(C)

insert value

in ppm

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