4.9 x 1.8mm SMD Tuning Fork

K255

(former FX255)

DATASHEET

© Copyright 2019 Fox Electronics. All rights reserved

Drawing Number: K255-DOC-1

Size: A

Part Number:

Cage: 61429

Draftsperson: MAJ

Approved: BEC

Revision Date: 10/21/2019

STANDARD SPECIFICATIONS

PARAMETERS

Frequency

32.768 kHz

Frequency Tolerance @ 25ºC

±20 PPM

Frequency Stability

(Temperature Coefficient)

Temperature Range

Turnover

Storage

+20ºC ~ +30ºC

-55ºC ~ +125ºC

(See options on page 2)

500MΩ Min

Drive Level

1.0 µW

0.1 µW Typ

Aging per year

±3 PPM

Maximum Soldering Temp / Time

260ºC / 10 Seconds x2

Moisture Sensitivity Level (MSL)

1

Termination Finish

Au over Ni

Seal Method

Au/Sn

Lead (Pb) Free

Yes

RoHS/Reach Compliant

Yes

Temperature Coefficient

‐180

‐160

‐140

‐120

‐100

‐80

‐60

‐40

‐20

0

‐40‐30‐20‐10 0 102030 405060 7080

ppm

°C

Page 1 of 2

Mechanical / Dimensions (millimeters):

Note: Dimensional drawing is for reference to critical specifications defined by

size measurements. Certain non-critical visual attributes, such as side

castellations, etc. may vary.