Package Size(mm): 8.0 * 3.8 * 2.54
Frequency(KHz): 32.768
Frequency Tolerance(ppm): ±20 - ±50
Operating Temperature(℃): -40 - +85
RoHS And Pb Free:
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Product details

Feature

  • Frequency range: 32.768kHz (20kHz~120kHz);
  • External dimensions: 8.0 × 3.8 × 2.54mm;
  • Harmonic times: fundamental frequency;

Application

  • Clocks and microcomputers;

Overview

MC-306 (kHz Frequency Range Crystal Unit Surface Mount (SMD))


  • Electrical Specifications


Item

Symbol

Specifications

Condition/Remarks

Nominal frequency range

f_nom

32.768kHz

20kHz to 120kHz

Please contact us regarding available frequencies

Storage temperature

T_stg

-55°C to +125°C

Store as bare product.

Operating temperature

T_use

-40°C to +85°C


Level of drive

DL

1.0µW Max.


Frequency tolerance (standard)

f_tol

±20 × 10-6, ±50 × 10-6

±50 × 10-6, ±100 × 10-6

+25°C, DL=0.1µW

Turnover temperature

Ti

+25°C ±5°C


Parabolic coefficient

B

-0.04 × 10-6/ °C2 Max.


Load capacitance

CL

6pF to ∞ (standard :12.5pF)

Please specify

Motional resistance (ESR)

R1

50kΩ Max.

As per below table


Motional capacitance

C1

1.8fF Typ.

4.0fF to 0.6fF


Shunt capacitance

C0

0.9pF Typ.

2.0pF to 0.6pF


Frequency aging

f_age

±3 ×10-6 / year Max.

±5 ×10-6 / year Max.

+25°C, First year

MC-306-1.png


  • Equivalent Series Resistance and Mode of Operation



Frequency

Motional  Resistance

20KHz≤ f <31.2KHz

55kΩ Max

31.2KHz≤ f <40KHz

35kΩ Max

40KHz≤ f <90KHz

20kΩ Max

90KHz≤ f <120KHz

12kΩ Max



  • Mechanical Dimensions


尺寸.gif


  • Reflow Condition


焊盘.gif


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