Typical HCMOS Pierce Oscillator

A conventional HCMOS Pierce oscillator is shown below. The

crystal oscillates at a frequency f above the crystal’s series-

resonant frequency. The crystal is effectively inductive and in

combination with R , C and C in the feedback loop, provides

approximately 180° of the phase shift necessary to ensure

oscillation.

O

F1

2

Order Code

CX-1

“S” if special

or custom design

Blank if standard

Frequency

SM1

SM2

SM3

Calibration

Tolerance*

@ 25°C

A, B, C

32MHz

SM1

Circuit Design

Conventional HCMOS Pierce Oscillator Circuit

CX-1

Buffer

Amplifier

Osc.

Freq. (Fo)

C

CX-1-SM - Bulk Pack (Standard)

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

per EIA 481

- Tray Pack (Optional)

Packaging

Temperature

Range:

C = Commercial

I = Industrial

M = Military

S = Specify

( A / 25ppm / 50ppm / I )

O.T.=3rd O.T. Mode

Blank = Fundamental

C = Ceramic Lid

Blank = Glass Lid

Frequency

Stability

over

Temperature

Range

Total

Frequency

Tolerance

*For other calibration tolerances

enter figure in ppm

Terminations

Designation

SM1

Gold Plated

SM2

Nickel, Solder Plated

SM3

Nickel, Solder Plated and Solder Dipped

Termination

1.78

4.06

6.86

Suggested Solder Pad Layout

HG

CX-1HG-SM

8MHz to 160MHz

HIGH SHOCK

MINIATURE AT-CUT

SMD CRYSTAL

CX-1HG-SM

8MHz to 160MHz

MINIATURE AT-CUT

SMD CRYSTAL

HIGH SHOCK

+44(0)1460 230000

+44(0)1460 230001

sales@euroquartz.co.uk

www.euroquartz.co.uk

Telephone:

Fax:

Email:

Web:

CX MINIATURE CRYSTALS

Page

2of2